2025.12.20 – A December Date That Slips: Argentina’s Christmas Tree Tradition and Its Roots

Key Takeaways

The idea in one breath

  • In Argentina (South America), many families put up the Christmas tree on December eight, but one family in December two thousand twenty-five moved it to the weekend of December thirteen–fourteen because a family member could not do Monday.
  • The date points to a Catholic feast day with a long history: the Solemnity of the Immaculate Conception.
  • In the mid-nineteen-nineties, Argentina (South America) also fixed December eight as a national holiday in law, which helped make the date even more visible.
  • Other places choose different “start days” for decorations, shaped by local calendars, faith, and public holidays.

Story & Details

A plan that already happened

In Argentina (South America), December eight often works like a small starting bell for the season. Many homes choose that day to put up the Christmas tree. In December two thousand twenty-five, one family kept the tradition’s spirit but changed the timing: the tree went up on the weekend of December thirteen–fourteen, because Monday did not work for a family member. By December twenty, two thousand twenty-five, that weekend had already passed, and the choice had done what traditions often do best: it helped the household line up one simple moment together. The plan was also meant to be shared in a short message to the family group, so everyone would remember the new day.

Why December eight matters

The pull of December eight is not random. In the Catholic calendar, it is the Solemnity of the Immaculate Conception, placed nine months before September eight, the feast of Mary’s birth. The feast’s story has key steps that are often repeated in church histories: approval in fourteen seventy-six, extension to the wider church in seventeen oh eight, and the formal dogma proclamation in eighteen fifty-four.

In Argentina (South America), the date also gained a strong civic shape. Law 24.445 lists December eight as a national holiday, with the law recorded as passed in December nineteen ninety-four and promulgated in January nineteen ninety-five. A later national holidays law, Law 27.399, also includes the date in the modern holiday framework. Put simply, the home custom and the public calendar reinforce each other: a day that is already meaningful becomes even easier to keep when it is also a day off.

A quick world glance

Not every country starts the season the same way. Italy (Europe) and Spain (Europe) are often linked to December eight because the same feast day is public and familiar. The United States (North America) commonly shifts into decorating soon after Thanksgiving, which falls on the fourth Thursday of November. Germany (Europe) is well known for Christmas Eve customs, and many families decorate the tree close to December twenty-four. The Philippines (Asia) is famous for a very long season, with decorations and music starting as early as September. Russia (Europe and Asia) is often described through a different center of gravity: the decorated tree is strongly tied to New Year celebrations, with a major revival of the “New Year tree” tradition in the Soviet period.

A tiny Dutch mini-lesson for the season

Here are two natural Dutch lines that fit the topic, with a simple meaning first and then a careful word-by-word guide.

Sentence: “We zetten de kerstboom op.”
Meaning: People put up the Christmas tree.
Word-by-word: We = we; zetten = put, place; de = the; kerstboom = Christmas tree; op = up.
Use: Everyday, friendly, normal at home.

Sentence: “We doen het dit weekend.”
Meaning: People do it this weekend.
Word-by-word: We = we; doen = do; het = it; dit = this; weekend = weekend.
Use: Very common and casual. It works for plans with family or friends.

Conclusions

A tradition that breathes

December eight stays strong in Argentina (South America) because it sits on two tracks at once: a church feast day with deep roots, and a public holiday that makes the day easy to keep. Still, the most real part of the story is the small change: when Monday is not possible, the weekend becomes the new marker, and the season begins anyway.

Selected References

[1] Vatican News — “Solemnity of the Immaculate Conception of the Blessed Virgin Mary.” https://www.vaticannews.va/en/liturgical-holidays/solemnity-of-the-immaculate-conception-of-the-blessed-virgin-mar.html

[2] Casa Rosada — “Immaculate Conception Day of the Virgin Mary.” https://www.casarosada.gob.ar/international/latest-news/50830-immaculate-conception-day-of-the-virgin-mary

[3] Official legal text — Law 24.445 (national holidays; includes December eight). https://www.argentina.gob.ar/normativa/nacional/ley-24445-782/texto

[4] Official legal text — Law 27.399 (national holidays framework). https://www.argentina.gob.ar/normativa/nacional/ley-27399-281835/texto

[5] Encyclopaedia Britannica — “Thanksgiving Day.” https://www.britannica.com/topic/Thanksgiving-Day

[6] Germany Travel — “Christmas Eve.” https://www.germany.travel/en/cities-culture/christmas-eve.html

[7] ABC News (Australia) — “Why many Filipinos celebrate Christmas from September 1.” https://www.abc.net.au/news/2021-12-19/why-many-filipinos-celebrate-christmas-from-september-1/100677072

[8] Radio Free Europe/Radio Liberty — “Russian New Year: …” (tree linked to New Year; mentions 1935 revival). https://www.rferl.org/a/russia-christmas-new-near-traditions-food-customs/31010307.html

[9] YouTube (Vatican News) — “December 8, 2025 Homage to the Statue of the Immaculate Conception.” https://www.youtube.com/watch?v=FW-qOU3eO5U

Appendix

Advent. A Christian season that begins on the fourth Sunday before Christmas and is used as a time of waiting and preparation.

Christmas tree. A decorated evergreen tree, real or artificial, used in many homes as a main symbol of the Christmas season.

Immaculate Conception. A Catholic teaching that Mary, from the first moment of her existence, was preserved from original sin; the feast is kept on December eight.

National holiday. A day set by law when many workplaces, schools, and offices close, making it easier for families to gather.

Nativity of Mary. A feast day that marks Mary’s birth, kept on September eight, and used as a calendar pair to explain the “nine months” link.

Thanksgiving. A public holiday in the United States (North America) observed on the fourth Thursday of November, often treated as a cultural start point for winter holiday decorating.

Yolka. A decorated tree linked to New Year celebrations in Russia (Europe and Asia), especially in modern tradition.

2025.12.20 – The Slow-but-Steady Script for Fearful Days

Key Takeaways

  • This article is about the Slow-but-Steady Script: a short plan for days marked by fear or the feeling of being slow.
  • The script keeps movement alive, but it lowers the pressure: fewer priorities, simple actions, and a calm sentence for the present moment.
  • Its logic matches well-known ideas in modern psychology, including Behavioural Activation and Acceptance and Commitment Therapy. Evidence reviews and summaries support these approaches. [1] [2] [5]

Story & Details

In December two thousand twenty-five, the world still runs fast. Many men do not. Some days feel thick. Fear shows up. A harsh label appears: slow. The Slow-but-Steady Script is built for that moment.

It starts with a small choice: move, even if the pace is gentle. The point is not speed. The point is direction. A day that includes even one clean step can feel different from a day that stops at the doorway.

Then the script narrows the field. Only a few priorities remain. This matters because stress can drain the brain’s planning power. Under pressure, the mind can slide from careful thinking to quick, reactive modes. When that happens, fewer choices can be a relief, not a loss. [4]

The next move is simple on purpose. A small physical task gives the day a handle. It is concrete. It ends. It leaves proof on the table: something happened. Behavioural Activation is built on this kind of step. It is a practical method that links action and mood, and it is widely studied. [1] [2]

The script also keeps one short sentence close. It does not make promises about the future. It only steadies the present. That kind of grounding fits well with self-compassion work, where the goal is to soften self-attack and reduce distress with a kinder inner tone. [3]

Acceptance and Commitment Therapy adds another layer. It does not ask people to erase fear first. It asks for valued action with fear still in the room. That is a quiet but powerful shift: the day can move even when the mind feels loud. [5]

A tiny Dutch mini-lesson can echo the same idea for anyone living in the Netherlands (Europe) or learning the language. One useful sentence is: Voor nu is alles goed. Word by word it reads: voor = for, nu = now, is = is, alles = everything, goed = good. In real use, it is a calm way to say the present moment is okay. A close, everyday variant is: Het is nu goed (word by word: het = it, is = is, nu = now, goed = good).

Conclusions

The Slow-but-Steady Script is not a magic fix. It is a steady tool. It lowers the bar without lowering dignity. It keeps a man moving, even on a hard day, and it does so in a way that fits what research often recommends: fewer demands, clearer steps, and kinder self-talk. [1] [3] [5]

Selected References

[1] Cochrane. Behavioural activation therapy for depression in adults. https://www.cochrane.org/evidence/CD013305_behavioural-activation-therapy-depression-adults
[2] University of Washington (United States, North America), AIMS Center. Evidence Base for Behavioral Activation (BA) (PDF, updated May six, two thousand twenty-five). https://aims.uw.edu/wordpress/wp-content/uploads/2025/05/Evidence-Base-for-BA.pdf
[3] PubMed. Kirby JN, Tellegen CL, Steindl SR. A Meta-Analysis of Compassion-Based Interventions: Current State of Knowledge and Future Directions. https://pubmed.ncbi.nlm.nih.gov/29029675/
[4] PubMed Central (PMC). Arnsten AFT. Stress weakens prefrontal networks: molecular insults to higher cognition. https://pmc.ncbi.nlm.nih.gov/articles/PMC4816215/
[5] PubMed. A-Tjak JGL, et al. A meta-analysis of the efficacy of acceptance and commitment therapy for clinically relevant mental and physical health problems. https://pubmed.ncbi.nlm.nih.gov/25547522/
[6] YouTube. NHS (United Kingdom, Europe). Self-help for low mood and depression. https://www.youtube.com/watch?v=qKcRUOWYQ9w

Appendix

Acceptance and Commitment Therapy (ACT). A type of talking therapy that focuses on psychological flexibility: noticing difficult thoughts and feelings, and still choosing actions linked to values. [5]

Behavioural Activation. A structured approach that helps people feel better by doing small, meaningful activities, especially when mood is low and avoidance grows. [1] [2]

Catastrophizing. A thinking pattern where the mind jumps to the worst outcome and treats it as likely, which can raise fear and tension.

Executive Functions. Brain skills used for planning, focus, self-control, and switching tasks; stress can weaken these skills, so simpler plans can help. [4]

Grounding Sentence. A short line used to steady attention in the present moment, without arguing with fear or predicting the future.

Rumination. Repeating the same worries again and again in the mind, often without reaching a helpful next step.

Self-compassion. A way of responding to personal struggle with kindness and steadiness instead of harsh self-judgment; research links it with lower distress. [3]

Values-based Action. Choosing small actions that fit what matters most, even when feelings are uncomfortable, a core idea in ACT. [5]

2025.12.20 – When “Not a Perfect Ten” Turns Into a Personal Earthquake

Key Takeaways

The subject

This piece is about what happens inside a person when a rating, score, or judgment feels less than perfect.

The emotional trap

A small gap between “very good” and “perfect” can feel like a fall into “very bad,” especially when the reason is unclear.

The way out

Clear, concrete feedback—about actions and impact—can turn panic into direction, in work, school, sport, art, and relationships.

Story & Details

A familiar moment, far beyond one setting

In December 2025, the moment has already happened: someone sees a result that is not a perfect ten. It could be a work review, an exam grade, a competition score, a comment on a creative project, a lukewarm reaction in dating, or silence after sharing something personal. The details change. The feeling often does not.

The mind makes a fast leap. It turns “not perfect” into “something is wrong.” Then it slides into extremes: very good becomes very bad. The middle disappears. The body answers with stress—tight chest, busy thoughts, short patience—because uncertainty feels like danger.

Why the missing reason hurts more than the number

A score is not only a signal. It is also a story trigger. When the reason is not clear, the brain tries to fill the blank. It can invent harsh answers: “I failed,” “I am not good,” “I fooled everyone,” “I do not belong.” This is not logic. It is self-protection that misfires.

In real life, a “not-ten” can mean many things. The judge may value a different style. The audience may not have noticed the effort. The goal may have been unclear. The timing may have been off. The result may be strong but not visible. Sometimes the scale itself is strict, and top marks are rare.

A gentle shift: from blame to clarity

The most stabilizing move is to change the question. Not “What is wrong with me?” but “What, exactly, was the yardstick?”

That shift works in many places. A student can ask which parts lost points, and which parts were strong. An athlete can ask what the coach wants to see in the next training block. A writer can ask what felt unclear to a reader. A partner can ask what felt missing in a conversation, and what felt good. The goal is not to beg for praise. The goal is to get specific information that can be used.

The best feedback is concrete. It names what happened, what it caused, and what would help next time. It avoids labels. It avoids mind-reading. It focuses on actions and impact.

A short Dutch mini lesson for asking for feedback in the Netherlands (Europe)

In the Netherlands (Europe), polite phrasing often opens doors. These phrases are simple and widely usable.

Kunt u mij feedback geven?
Simple meaning: a polite request for feedback.
Word-by-word: Kunt = can, u = you, mij = me, feedback = feedback, geven = give.
Tone and use: formal and respectful; good for a manager, teacher, or official setting.

Wat kan ik beter doen?
Simple meaning: asking what to improve.
Word-by-word: Wat = what, kan = can, ik = I, beter = better, doen = do.
Tone and use: neutral and common; fits many everyday situations.

Wat miste er om een tien te halen?
Simple meaning: asking what was missing for a top score.
Word-by-word: Wat = what, miste = was missing, er = there, om = to, een = a, tien = ten, te halen = to achieve.
Tone and use: direct but still polite; best used with a calm voice and a learning focus.

Conclusions

A score is a moment, not a whole identity

A single rating can feel like a loud verdict. Often it is only a narrow signal, shaped by context, expectations, and visibility.

The calmer ending

When the reason becomes clear, the mind can stop spinning. What stays is usable: what worked, what did not, and what “excellent” looks like next time.

Selected References

[1] Center for Creative Leadership — Tips for giving feedback and avoiding feedback mistakes — https://www.ccl.org/articles/leading-effectively-articles/review-time-how-to-give-different-types-of-feedback/
[2] NHS (United Kingdom, Europe) — Reframing unhelpful thoughts — https://www.nhs.uk/every-mind-matters/mental-wellbeing-tips/self-help-cbt-techniques/reframing-unhelpful-thoughts/
[3] NHS (United Kingdom, Europe) — Stress: tips on managing stress — https://www.nhs.uk/every-mind-matters/mental-health-issues/stress/
[4] Mind (United Kingdom, Europe) — Managing stress and building resilience — https://www.mind.org.uk/information-support/types-of-mental-health-problems/stress/managing-stress-and-building-resilience/
[5] CDC (United States, North America) — Managing stress — https://www.cdc.gov/mental-health/living-with/index.html
[6] TED (YouTube) — The secret to giving great feedback — https://www.youtube.com/watch?v=wtl5UrrgU8c

Appendix

All-or-nothing thinking

A habit of judging life in extremes, like perfect or terrible, which makes normal feedback feel like disaster.

Feedback

Information about actions and their effects, meant to help a person repeat what works and adjust what does not.

Reframing

A way to step back from the first harsh story the mind tells and test other, more balanced explanations.

Score

A number or judgment that measures a small slice of performance or impact, not the full person.

Stress

A pressure response in mind and body that rises when something feels important, unclear, or out of control.

Visibility

How easy it is for other people to see the impact of effort, results, and follow-through.

2025.12.20 – The Two-Option Check-In: When Long Tiredness Meets Work Strain

Key Takeaways

  • A two-option check-in can turn a heavy, mixed feeling into a clear picture.
  • The tiredness described here lasts longer than a week and feels mostly physical.
  • Sleep feels mostly normal, yet rest still does not feel fully restoring.
  • The stress points to work or study, split between overload and loss of meaning.
  • The pressure feels both time-limited and also part of a constant background.

Story & Details

A clear subject, a simple method

This piece is about the Two-Option Check-In, a small method that uses only A-or-B choices to map tiredness and stress. On December 20, 2025, in the Netherlands (Europe), the check-in captured one cluster of feelings in plain words: feeling bad, tired, “mokestp,” fed up, and worried.

The body in front, the mind close behind

The first shape was time. This was not a short dip. It had lasted more than seven days. The next shape was weight. The tiredness felt more physical than mental. Sleep did not sound fully broken, yet it did not feel fully good either. Most of the time it felt normal, but part of the time it felt affected.

Work as the main stage

The stress did not float without a cause. It pointed to one main place: work or study. Inside that place, the strain split in two. One half was overload: too much to do, too much pressure, not enough room to breathe. The other half was meaning: a sense that the work did not feel worth it, or did not feel like the right path.

A mixed timeline, a narrow hinge

Time did not give a clean answer either. Part of the pressure felt like a peak with an end point, like deadlines or exam weeks. Another part felt like a steady layer that stayed even when the peak passed. That mix matters, because it suggests two needs at once: short relief for the peak, and a deeper change for the steady layer.

Small moves that fit the picture

Early steps stayed simple and real. Less screen time before rest. A short pause that is truly a pause. Food and water that are not skipped. Gentle movement and daylight early in the day. A short list of worries to get them out of the head and onto the page. When tiredness lasts for weeks, or daily life shrinks, health checks can be a practical next step, because long tiredness can have many causes.

One safety line

If thoughts of hurting yourself appear, urgent help matters more than any method.

Conclusions

Long tiredness can look like one problem, yet it often carries more than one layer. Here, the body felt heavy, sleep felt only partly restoring, and work carried both pressure and loss of meaning. The most hopeful part is that the picture is clear enough to act on: protect recovery, reduce overload where possible, and rebuild a sense of direction so effort can feel worth it again.

Selected References

[1] https://www.who.int/news/item/28-05-2019-burn-out-an-occupational-phenomenon-international-classification-of-diseases
[2] https://www.nhs.uk/symptoms/tiredness-and-fatigue/
[3] https://www.cdc.gov/sleep/about/index.html
[4] https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/burnout/art-20046642
[5] https://www.health.harvard.edu/staying-healthy/sleep-hygiene-simple-practices-for-better-rest
[6] https://www.youtube.com/watch?v=imwnk-6seIc

Appendix

Burnout. A work-linked state marked by deep exhaustion, distance from the job, and a drop in feeling effective.

Fatigue. Strong tiredness that does not lift with normal rest and makes daily tasks feel harder.

Meaning. The sense that work matters, fits values, and points to a goal that feels real.

Mokestp. A word used as written; it signals an unclear feeling that sits near irritation or inner unrest.

Overload. Too much demand for the time, energy, or control available.

Recovery. The body’s return to energy through rest, sleep, food, movement, and calm time.

Screen-free rest. Rest time without a phone or other bright, demanding screens.

Sleep quality. How restoring sleep feels, not only how many hours it lasts.

Two-Option Check-In. A guided self-check that uses only two choices at each step to find patterns fast.

Worry. Repeating fear-based thoughts that keep the mind tense and drain energy.

2025.12.20 – A Leader’s Mood, a Team’s Climate, and the Quiet Harm of Toxic Positivity

Key Takeaways

The short version

  • A leader’s emotional tone often spreads through a team, shaping motivation, trust, and daily effort.
  • Positivity helps when it stays honest; it harms when it becomes a demand to feel fine.
  • Toxic positivity can look polite, but it can leave people feeling unseen, tense, and alone.
  • Teams do better with grounded optimism: clear facts, real emotions allowed, and steady support.

Story & Details

A familiar workplace pattern

In December 2025, many teams still recognize the same scene: a project moves forward, but the mood feels heavy. A leader looks disengaged, irritated, and worn down. The air changes. People start to mirror it. Energy drops, patience thins, and the work begins to feel pointless.

The opposite scene also exists. Another leader shows calm confidence, warmth, and a steady kind of joy. Nothing magical happens to the project itself, yet the team’s posture changes. People speak up more easily. They try. They recover faster after setbacks.

This is not just imagination. In organizational psychology, emotions are not only private feelings. They are also social signals. They move between people, especially when one person has status, attention, and power.

Why a leader’s attitude spreads

Research on emotional contagion shows that moods can transfer within groups and then shape how the group behaves. In controlled studies, a single person’s expressed emotion can shift the group’s shared mood and influence cooperation and conflict. The group does not simply “feel” differently; it also acts differently. Small changes in tone can change how willing people are to help, how they interpret others’ actions, and how they handle stress. [1]

A related idea is affective presence. This is the stable emotional “trace” someone tends to leave in others after interactions. Some leaders repeatedly leave people feeling encouraged and safe; others repeatedly leave people tense or anxious. This effect can be separate from what the leader reports feeling inside. What matters for the team is what the team experiences during contact. Studies in team settings connect leader behavior and feedback style to whether a leader becomes a source of positive or negative affective presence. [2]

A third piece is psychological safety: the shared belief that it is safe to take interpersonal risks, like asking a hard question, admitting an error, or saying “I do not understand.” Research on real work teams shows that leader behavior strongly shapes this safety. Supportive, coaching-like responses tend to raise it. Punitive or dismissive behavior tends to lower it. When safety drops, people protect themselves. They speak less, hide mistakes, and learn more slowly. [3]

So a leader’s visible frustration can do more than “set a mood.” It can quietly teach the team that the situation is unsafe, unstable, or not worth investing in. That lesson changes choices. It changes effort. It changes honesty.

When “stay positive” turns into a problem

Now comes the twist. Even in teams with an upbeat leader, positivity can go wrong. This is where toxic positivity enters.

Toxic positivity is not hope. It is not encouragement. It is the social pressure to be upbeat in a way that denies real pain, real limits, or real fear. It often shows up as quick fixes: “Look on the bright side,” “Everything happens for a reason,” “At least it’s not worse,” said at the exact moment someone needs to be heard.

Mental health educators describe it as the expectation that encouraging statements should push away painful emotions, creating pressure to be unrealistically optimistic. The result can be shame for feeling bad, and silence when support is needed most. [4]

In workplace research, the idea is being shaped more carefully. One scholarly definition frames toxic positivity at work as an interpersonal response that fails to acknowledge another person’s negative emotional experience by dismissing it, pushing positivity that does not fit reality, or both. The key is not the word “positive.” The key is the refusal to make space for what is true. [5]

How toxic positivity damages teams

Toxic positivity can harm teams in several quiet ways.

The cost of invalidation

When a person’s distress is brushed away, the person often stops sharing. That may look like “less drama,” but it can also mean less warning, less learning, and less trust. Over time, people can feel lonely inside a crowd.

The cost of emotional suppression

If a workplace rewards only “good vibes,” people learn to hide what they feel. Emotion regulation research shows that some strategies, like expressive suppression, can be effortful and does not reliably reduce the inner experience of unwanted emotion. It can also carry cognitive and social costs. In a team, constant masking can drain attention and reduce genuine connection. [6]

The cost of false certainty

Real optimism is compatible with realism. Toxic positivity is not. It replaces clear facts with a demand for a bright face. That can backfire, because people can sense the mismatch between words and reality.

A useful alternative is sometimes called tragic optimism: the ability to face pain and still search for meaning and action. It is not “everything is fine.” It is “this is hard, and there is still a next step.” [7]

Mood transfer: not only negative, not only positive

Emotion transfer in leader–follower relationships is not only about negative mood spreading. Research on crossover models also looks at positive states. For example, studies in healthcare settings suggest that leaders’ positive work engagement can cross over into followers’ well-being outcomes, often through the way leadership behaviors are experienced. [8]

In other words, a leader can spread depletion, but also spread energy. The same social pathways that carry frustration can also carry steadiness, clarity, and hope.

A short Dutch moment

Simple phrases for everyday work tone

Dutch can sound direct, yet it has gentle, practical phrases that fit hard moments at work in the Netherlands (Europe).

The phrase “Dat is balen” is used when something is disappointing. A simple meaning is: this is a bummer. Word by word: “Dat” means that, “is” means is, “balen” means to be a drag. The tone is informal and human, often used with colleagues.

The phrase “Sterkte” is used when someone is going through something tough. A simple meaning is: strength to you. Word by word: it is one word built from “sterk,” meaning strong, with a form that turns it into a wish. The tone can be friendly or neutral, and it fits both small and serious struggles.

The phrase “Ik snap het” is used to show understanding. A simple meaning is: I get it. Word by word: “Ik” means I, “snap” means get, “het” means it. The tone is informal, warm, and often helps before any problem-solving begins.

Conclusions

A steady path between gloom and gloss

A leader’s emotional stance can shape a team’s emotional climate through well-studied social processes: emotional contagion, affective presence, and the conditions that build or break psychological safety. When a leader appears angry, disengaged, or defeated, the team often becomes cautious and depleted. When a leader appears grounded, warm, and confident, the team often becomes braver and more engaged.

Yet positivity is not automatically healthy. When it becomes a rule that forbids honest pain, it turns toxic. The healthiest climate is not constant cheer. It is emotional truth with dignity: clear eyes, real feelings allowed, and a practical belief that the next step can still be taken.

Selected References

[1] Barsade, S. G. “Emotional Contagion and Its Influence on Group Behavior.” PDF: https://faculty.wharton.upenn.edu/wp-content/uploads/2012/05/Barsade_Emotional_Contagion_in_Groups.pdf

[2] Madrid, H. P. “Leader Affective Presence and Feedback in Teams.” Frontiers in Psychology: https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2020.00705/full

[3] Edmondson, A. “Psychological Safety and Learning Behavior in Work Teams.” PDF: https://web.mit.edu/curhan/www/docs/Articles/15341_Readings/Group_Performance/Edmondson%20Psychological%20safety.pdf

[4] Anxiety and Depression Association of America. “Toxic Positivity.” https://adaa.org/learn-from-us/from-the-experts/blog-posts/consumer/toxic-positivity

[5] Lefcoe, A. “Toxic Positivity in the Workplace.” McMaster University (North America) repository PDF: https://macsphere.mcmaster.ca/bitstreams/7e62df00-6d47-4db2-a64e-449bd4d8adbb/download

[6] Koole, S. L. “The Psychology of Emotion Regulation.” Vrije Universiteit Amsterdam (Europe) PDF: https://research.vu.nl/ws/files/2599118/Koole%20Cognition%20and%20Emotion%2023%281%29%202009%20u.pdf%26lang%3Den

[7] Association for Psychological Science. “The Opposite of Toxic Positivity.” https://www.psychologicalscience.org/news/the-opposite-of-toxic-positivity.html

[8] Caputo, A. et al. “Leaders’ Role in Shaping Followers’ Well-Being: Crossover in a Sample of Nurses.” International Journal of Environmental Research and Public Health: https://www.mdpi.com/1660-4601/20/3/2386

YouTube video
Cleveland Clinic (North America). “Explaining the dangers of toxic positivity.” https://www.youtube.com/watch?v=IJ-oEVOKQrk

Appendix

A–Z terms

Affective presence: The consistent feelings a person tends to leave in others after interaction, such as making people feel calm, encouraged, tense, or anxious.

Burnout: A state of long-lasting work-related exhaustion that often includes feeling drained, distant, and less effective.

Cognitive reappraisal: An emotion regulation strategy that changes how a situation is interpreted in order to change its emotional impact.

Emotional contagion: The spread of emotion from one person to another, often through facial expression, voice, pace, and shared attention.

Expressive suppression: An emotion regulation strategy that tries to hide outward emotion signs, like keeping a neutral face while feeling upset.

Psychological safety: A shared team belief that it is safe to speak up, ask questions, and admit mistakes without being punished or shamed.

Tragic optimism: A realistic form of hope that faces pain and limits while still searching for meaning and a workable next step.

Toxic positivity: The pressure to show or demand positivity in ways that dismiss, deny, or invalidate real negative emotions and real hardship.

2025.12.20 – Exxon ROP and SPIE in 2025: One Short Label, Two Very Different Worlds

Key Takeaways

The core point

“Exxon ROP” in Rotterdam is a site label for a chemical plant, not a business slogan.

The second name

SPIE Nederland is a technical services company that often works on electrical and instrumentation tasks in heavy industry.

What can and cannot be proven

Public pages support what ROP is and where it sits, but they do not clearly name a specific SPIE work package at that site for August 2025.

Why the confusion sticks

Both labels are short, common in daily speech, and easy to mix up when people move between contractors, permits, and plant gates.

Story & Details

A small label that refused to stay small

By December 20, 2025, August 2025 had already passed, but a two-word note from that month still caused real confusion: “Exxon ROP.” This article is about what that label means in Rotterdam, and how it can be mistaken for a company name like SPIE.

ROP as a place in the Rotterdam port industry

In the Rotterdam port area, ROP is used as shorthand for the Rotterdam Oxo-Alcohol Plant, part of ExxonMobil’s chemical footprint in the Netherlands (Europe). Public ExxonMobil location information lists a Rotterdam oxo-alcohol plant in Europoort and gives a reception contact for the site. Dutch public notices also use “Rop” alongside the operator name ExxonMobil Chemical Holland B.V., which is a strong sign that ROP is treated as a site label in formal records, not only in informal talk.

What “oxo-alcohol” means in plain words

“Oxo-alcohol” sounds abstract, but the idea is simple. These are building-block chemicals. They help make other products. In many industrial chains, oxo-alcohols connect strongly to plasticizers, which help make rigid plastics more flexible. They also connect to solvents, adhesives, and some additive chemistry used in oils and fuels. Industry methodology commonly groups the oxo-alcohol set around n-butanol, isobutanol, and 2-ethylhexanol, and it explains that these materials are mainly feedstocks for downstream products.

A separate, practical clue appears in a quality certificate schedule that names the Rotterdam “ROP location” under a scope describing higher alcohols in the C8 to C11 range. In simple terms, that is another public hint that the ROP label belongs to a chemical production chain, not to a finance ticker, a project nickname, or a job title.

SPIE as a different kind of name

Now the other acronym. In the Netherlands (Europe), SPIE Nederland is a technical services company that supports industrial sites with work that often falls under Electrical and Instrumentation. Public SPIE material about turnarounds describes a model built around long-term relationships on customer sites, with people who know the plant and take on both maintenance and modifications. This is the kind of work that fits large chemical plants: planned shutdowns, reliability work, small changes, and fast troubleshooting when equipment needs attention.

What SPIE work could look like at an oxo-alcohol site

Public pages do not clearly name a dedicated, site-specific SPIE work package for the Rotterdam oxo-alcohol plant in August 2025. Still, the map of typical work is familiar across heavy industry.

Electrical and Instrumentation work often means checking instruments, helping with calibration, supporting loop tests, and solving faults in plant signals or power. Maintenance work often means planning and executing preventive and corrective tasks. Small projects and modifications can mean adding panels, moving cables, changing sensors, or updating safety-related systems. These scopes are not exotic. They are the daily rhythm of industrial uptime.

At the same time, Rotterdam industry is also shaped by longer-term decarbonisation plans. ExxonMobil has publicly discussed Carbon Capture and Storage partnerships and a pilot approach tied to carbonate fuel cell technology in the Rotterdam area. This does not prove what a given crew did on a given day, but it helps explain why the wider conversation around big sites can include both classic maintenance and future-looking carbon work.

A small Dutch pocket lesson for first days on site

Dutch is often heard at gates and during safety moments in the Rotterdam port area. The lines below are short and reusable. The translations aim to be both clear and precise, without losing how the phrases feel in real use.

Goedemorgen, ik ben van SPIE.
Use: a polite greeting and a simple introduction.
Word-by-word: good morning; I am; from; SPIE.
Tone: neutral and friendly.

Waar is de werkvergunning?
Use: asking where the work permit is, often at the start of a task.
Word-by-word: where; is; the; work permit.
Tone: direct and normal on site.

Is dit veilig?
Use: a quick safety check before touching equipment or entering an area.
Word-by-word: is; this; safe.
Tone: short, serious, and appropriate.

Ik heb een vraag over de planning.
Use: raising a question about the plan or schedule without sounding confrontational.
Word-by-word: I; have; a; question; about; the; planning.
Tone: calm and cooperative.

Kunnen we dit even samen controleren?
Use: asking to verify something together, often to avoid mistakes.
Word-by-word: can; we; this; briefly; together; check.
Tone: collaborative and practical.

Conclusions

One label, two worlds

In Rotterdam, “Exxon ROP” points to a real industrial place: a chemical site tied to oxo-alcohol production and its downstream chains. SPIE, in the same regional setting, points to a contractor world: technical services, Electrical and Instrumentation work, and the day-by-day craft of keeping plants running.

The safest clean takeaway

Public sources can firmly anchor what ROP means and how it is used in formal records. Public sources can also describe SPIE Nederland’s typical industrial role. What public sources do not clearly provide is a named, dedicated SPIE work package at the Rotterdam oxo-alcohol site for August 2025. The difference matters, because short labels travel fast—and mistakes travel with them.

Selected References

[1] https://corporate.exxonmobil.com/locations/netherlands/contact-us
[2] https://www.officielebekendmakingen.nl/prb-2025-1926.html
[3] https://repository.tno.nl/SingleDoc?docId=53183
[4] https://s3-eu-west-1.amazonaws.com/cjp-rbi-icis-compliance/wp-content/uploads/2013/10/Oxo-Alcohols-Methodology-October-2013.pdf
[5] https://www.exxonmobilchemical.com.cn/-/media/project/wep/exxonmobil-chemicals/chemicals/chemicals-cn/home/resources/contact-us/2900_source.pdf
[6] https://www.spie-nl.com/artikel/sturen-op-competenties-bij-turnarounds
[7] https://www.youtube.com/watch?v=YWjN7MTAHHM

Appendix

Acronym

An acronym is a short form built from initial letters. It saves time in technical work, but it can also create confusion when the same letters exist in different industries.

Carbon Capture and Storage

Carbon Capture and Storage is a set of technologies that capture carbon dioxide and store it to reduce emissions, often linked to large industrial sites and long-term infrastructure plans.

Electrical and Instrumentation

Electrical and Instrumentation is the field that covers industrial power systems and the instruments that measure and control a plant, including signals, sensors, and protective systems.

Europoort

Europoort is a major industrial and logistics zone in the Rotterdam port area in the Netherlands (Europe), used as a location label for large terminals and plants.

Higher Alcohols

Higher alcohols are alcohol molecules with longer carbon chains, often described by ranges like C8 to C11, and used as chemical intermediates in industrial production.

Oxo-Alcohols

Oxo-alcohols are a family of alcohols produced through oxo chemistry routes and used mainly as intermediates for other products, including plasticizers and other industrial chemicals.

Plasticizers

Plasticizers are additives that make rigid plastics more flexible and easier to process, and they are a common downstream use for parts of the oxo-alcohol chain.

Rotterdam Oxo-Alcohol Plant

The Rotterdam Oxo-Alcohol Plant is the facility commonly shortened to ROP in Rotterdam industry language and public records tied to ExxonMobil’s chemical operations in the Netherlands (Europe).

SPIE Nederland

SPIE Nederland is a technical services company in the Netherlands (Europe) that works in industrial settings, with public material that highlights Electrical and Instrumentation work and turnaround support.

Turnaround

A turnaround is a planned shutdown when a plant stops normal operations so teams can inspect, repair, replace, and upgrade equipment under controlled conditions.

Work Permit

A work permit on an industrial site is the formal authorization that defines what job may be done, where it may be done, and under which safety controls.

2025.12.20 – A Small Citroën C1 Warning Light, a Cold December Morning, and the Fastest Way Back to Calm

Key Takeaways

  • A steady Tire Pressure Monitoring System (TPMS) warning light usually means one or more tires are underinflated and need attention soon.
  • Cold weather can drop tire pressure, and a reading around 4°C makes that more likely.
  • A quick tire-pressure check can be done at a service-station air pump or by a local tire shop, often in minutes.
  • In Appingedam (Europe) and Delfzijl (Europe), Saturday options can be limited, so opening hours matter.
  • After correcting tire pressure, the Citroën C1 can store the new reference pressure using the TPMS “SET” control.

Story & Details

The moment the icon stayed on

On Saturday, December 20, 2025, in the northern Netherlands (Europe), a Citroën C1 showed a steady amber TPMS icon on the instrument cluster. The display also showed an outside temperature of 4°C and an odometer reading of 73,747 km. The light did not go away, staying on consistently rather than blinking.

That steady glow matters. A constant TPMS lamp typically points to low tire pressure rather than a sensor fault. In cold conditions, a small drop can be enough to cross the warning threshold, even when the tire still looks “fine” at a glance.

Where the dashboard buttons actually are

Inside the cabin, the “DISP” control is located by the instrument cluster area, used to cycle the display between ODO and Trip A/B. It is easy to miss at first because it sits low and close to the cluster trim.

But the more important control for this warning is not the “DISP” button. In this Citroën C1, a TPMS “SET” button is located in the glovebox area. It appears next to a pressure icon and the label “SET,” with a separate control marked “ON/OFF” nearby.

A brief Dutch mini-lesson that helps in real life

The owner’s material included short Dutch terms tied to the warning:

  • “Bandenspanning te laag”
    Word-by-word: banden = tires, spanning = pressure, te = too, laag = low.
    Typical use: direct and practical, the kind of phrase seen in warnings and manuals.
  • “Waarschuwing te lage bandenspanning”
    Word-by-word: waarschuwing = warning, te = too, lage = low, bandenspanning = tire pressure.
    Typical use: formal, manual-style wording.
  • “Storing”
    Word-by-word: storing = fault/malfunction.
    Typical use: short label for a technical problem.

The simple check that most drivers can do

Checking tire pressure is not a hard job for most drivers. It is usually a quick routine: find the recommended pressure on the vehicle’s tire label, read the current pressure at each wheel, then add air if needed. A small handheld gauge can do it, and many service-station pumps show the number on-screen.

The crucial detail is that the recommended number is not the maximum printed on the tire sidewall. The correct target is the vehicle maker’s specification for that car and tire size.

Saturday realities in Appingedam and Delfzijl

In Appingedam (Europe) and Delfzijl (Europe), the best place depends on what is actually open on Saturday.

AXI Banden in Appingedam lists Saturday opening hours, making it a practical option for a quick pressure check and advice when the weekend is already underway. Other well-known service points nearby may be closed on Saturdays, which can push the choice toward the shops that keep limited weekend hours.

KwikFit in Appingedam is a familiar name for tire services, but its listed hours indicate Saturday closure, which makes it less helpful for a same-day stop. In Delfzijl, Euromaster and Profile are established service providers with clear contact details and weekday availability, but Saturday closure can also be a limiting factor when the warning appears during the weekend.

Resetting after the tires are corrected

After the tires are inflated to the correct specification, the Citroën C1 procedure can include storing the new pressure reference using the in-car TPMS reset control. The guidance describes turning the ignition on with the car stationary, opening the glovebox area, and pressing the “SET” control to complete the reset, with confirmation shown by a brief lamp indication pattern.

When the pressure is right and the system has been reset correctly, the warning lamp should clear.

Conclusions

A steady TPMS light can feel alarming, but the story is often simple: cold air, slightly low pressure, and a car doing its job by warning early. In Appingedam (Europe) and Delfzijl (Europe), the fastest path is usually a pressure check that same day—either at a shop that is open on Saturday or at a reliable air pump—followed by a proper reset so the Citroën C1 can learn the corrected baseline again.

Selected References

[1] https://www.nhtsa.gov/vehicle-safety/tires
[2] https://www.axibanden.nl/contact/
[3] https://www.euromaster.nl/garages/groningen/delfzijl/yvksxkx-euromaster-delfzijl
[4] https://www.profile.nl/vestigingen/farmsum-delfzijl/venjelaan-2-4
[5] https://www.fulda.com/nl_nl/consumer/dealers/99/appingedam/kwikfit-appingedam-banden-apk-en-auto-onderhoud-160520.html
[6] https://www.youtube.com/watch?v=toQQyvIgK3A

Appendix

ACC A key position on many ignitions that powers accessories without fully starting the engine.

Direct TPMS A tire-pressure system that uses sensors inside each wheel to measure pressure and report it to the car.

DISP A display button used to cycle dashboard readouts such as odometer and trip meters.

ODO The odometer reading that shows total distance traveled by the vehicle.

TPMS Tire Pressure Monitoring System, the dashboard warning system that alerts when tire pressure is significantly low or when a fault is detected.

Trip A/B Two separate trip counters that track distance for shorter periods, often used between refuels or between service intervals.

Valve stem The small tire valve used to add or release air, where a gauge or air hose is attached.

2025.12.20 – A Two-Week Year-End Shutdown That Stays Clear in Every Calendar

Key Takeaways

The dates

A non-working period is set for December twenty-second, two thousand twenty-five through January fourth, two thousand twenty-six, both days included.

The count

The full break covers fourteen days.

The week numbers

The affected ISO weeks are week fifty-two of two thousand twenty-five and week one of two thousand twenty-six.

Story & Details

What this article is about

A year-end shutdown can sound simple, yet it often turns messy when it crosses from late December into early January. This piece is about one clear solution: name the shutdown dates, confirm the ISO week numbers, and place a matching all-day event into a shared calendar file.

The shutdown window

As of December twentieth, two thousand twenty-five, the shutdown is still ahead. It starts on Monday, December twenty-second, two thousand twenty-five, and ends on Sunday, January fourth, two thousand twenty-six. Both ends count. That makes fourteen days in total.

Why ISO week numbers matter

Many teams plan by ISO week. In this case, the break lines up neatly with two ISO weeks. ISO week fifty-two of two thousand twenty-five runs from Monday, December twenty-second through Sunday, December twenty-eighth. ISO week one of two thousand twenty-six runs from Monday, December twenty-ninth, two thousand twenty-five through Sunday, January fourth, two thousand twenty-six. The key detail is that ISO week one begins on a Monday, even when that Monday still sits in December.

The calendar file detail that prevents off-by-one mistakes

A simple iCalendar file, often saved with the .ics extension, can carry the shutdown as one all-day event. For all-day events, many calendar tools treat the end date as the first day that is not part of the event. That is why a shutdown that ends on January fourth is commonly stored with an end date of January fifth in the file, while still showing January fourth as the last day in the calendar app.

A short Dutch mini-lesson for real-world notices

In the Netherlands (Europe), short notices often aim for calm and direct language. These examples are practical and easy to reuse.

“Wij zijn gesloten van maandag tweeëntwintig december tweeduizend vijfentwintig tot en met zondag vier januari tweeduizend zesentwintig.”
Word-by-word guide: Wij = we; zijn = are; gesloten = closed; van = from; maandag = Monday; tweeëntwintig = twenty-two; december = December; tweeduizend vijfentwintig = two thousand twenty-five; tot = until; en met = and with; zondag = Sunday; vier = four; januari = January; tweeduizend zesentwintig = two thousand twenty-six. Tone: neutral and office-safe.

“Tot en met” is the small power tool in that sentence. It signals that the final day is included, not excluded. It is common in schedules, leave notes, and opening hours.

“Niet beschikbaar.”
Word-by-word guide: Niet = not; beschikbaar = available. Tone: short, firm, and normal in calendars. A softer option is “Even niet beschikbaar,” where Even adds a light “for a bit” feel.

Conclusions

A shutdown becomes easy to trust when it is said the same way in every place: in plain dates, in ISO week numbers, and in a calendar event that matches what people will see on their phones and laptops. With the period set from December twenty-second, two thousand twenty-five through January fourth, two thousand twenty-six, the year change stops being a source of confusion and becomes just a clean line in the plan.

Selected References

[1] https://www.iso.org/iso-8601-date-and-time-format.html
[2] https://www.rfc-editor.org/rfc/rfc5545.html
[3] https://datatracker.ietf.org/doc/html/rfc5545
[4] https://www.youtube.com/watch?v=wKJ0P0xKfCE

Appendix

All-day event

An event that covers a full date without a specific start hour, often shown as a banner across the day in a calendar.

Inclusive dates

A date range where the first day and the last day both count as part of the period.

ISO week

A week-number system where weeks start on Monday and are labeled so that planning stays consistent across years.

iCalendar

A standard format for exchanging calendar data, used by many tools to share events and schedules.

ICS file

A text file, usually ending in .ics, that holds iCalendar data so it can be imported into calendar apps.

Week boundary

The point where one labeled week ends and the next begins, which can matter when a plan crosses from one year into the next.

2025.12.20 – When Chat History Vanishes but Reminders Keep Going in ChatGPT

Key Takeaways

The subject in one line

ChatGPT has two different things that can outlast a message history: Memory and scheduled reminders, and they do not depend on the same switch.

What stays, even if the chat is deleted

Deleting a chat should not cancel or remove reminders that were already scheduled, because a chat is just history.

What Memory is, and what it is not

Memory is for saving personal preferences across chats, but reminders can stay active even when Memory is turned off.

Story & Details

A simple, clear idea

This piece is about ChatGPT, and one practical question: what happens to reminders when a chat is deleted, and what changes when Memory is turned off.

The answer depends on separating three ideas that can feel like one. There is what was said. There is what is remembered for personalization. And there is what is scheduled to happen later.

Chat history is not a schedule

A chat can feel like the “home” of a reminder. The reminder was created in that chat, so it feels tied to that chat. But the claim here is plain: deleting the chat should not delete the reminder. The chat is treated as a record. The reminder is treated as a plan.

That difference matters most on days when someone cleans up. History can be removed for peace of mind. A plan should keep working.

Memory is not the same as a reminder

Memory is described as a way to keep preferences or details across chats. It helps answers fit the person. A reminder is different. A reminder is a scheduled task that exists on its own timeline.

So the second claim is also plain: Memory does not need to be on for reminders to stay active.

A tiny Dutch mini-lesson for everyday tech talk

Dutch often builds meaning with small, strong words. Here are two useful lines for this topic.

Ik zet geheugen uit.
This is used to say a setting is turned off.
Word-by-word: Ik = I; zet = set/turn; geheugen = memory; uit = off.
Style note: neutral and direct, common in settings talk.

De herinnering blijft staan.
This is used to say something stays scheduled or remains in place.
Word-by-word: De = the; herinnering = reminder; blijft = stays; staan = standing/in place.
Style note: natural and calm, often used when something remains active.

Where the world stands in December

As of December 2025, the practical shape of the issue is easy to hold: chat deletion belongs to history, Memory belongs to personalization, and reminders belong to scheduling.

Conclusions

A cleaner mental model

ChatGPT can feel like one long stream, but it helps to think in layers.

History can be cleared. Memory can be turned off. Reminders can still run, because scheduling is its own track.

The calm takeaway

When the goal is a tidy sidebar and a working day, the safest expectation is simple: deleting words should not delete time.

Selected References

[1] https://help.openai.com/en/articles/10291617-tasks-in-chatgpt
[2] https://help.openai.com/en/articles/8590148-memory-faq
[3] https://help.openai.com/en/articles/8983778-chat-and-file-retention-policies-in-chatgpt
[4] https://openai.com/index/memory-and-new-controls-for-chatgpt/
[5] https://www.youtube.com/watch?v=WsGVXiWzTpI

Appendix

Chat History

The list of past chats shown in the product, used as a record of what was said.

Memory

A feature that can save personal details or preferences so future replies can match the user better.

Reminder

A prompt or alert meant to happen later, created so something is not forgotten.

Scheduled Task

A planned action set for a future time, which can be one-time or repeating.

Temporary Chat

A mode designed to avoid using saved personalization and to reduce what is kept from a session.

2025.12.20 – Power Naps and Sleep Inertia: When Five Minutes Can Beat Ninety

Key Takeaways

The simple idea

A sleep cycle is often close to ninety minutes, but it is not exact, and it changes from person to person.

The fast win

A very short nap can calm the body and mind without going deep, so it can feel clean and sharp after waking.

The safest middle

Many people do well with a short “power nap” that stays on the light side of sleep.

Story & Details

What this piece is about

This article is about power nap length and timing, and why some naps leave a person clear-headed while others feel heavy.

The ninety-minute myth, in plain terms

In December 2025, the “ninety-minute nap” still has a strong hold on everyday talk. It sounds neat: one full cycle, then wake up fresh. The truth is softer. Cycles are real, but they are not a clock. A cycle can run a bit shorter or longer, and the start time matters because the cycle begins after sleep actually starts.

Why a tiny nap can work

Sometimes the body does not need a full cycle. A few minutes of quiet can lower stress, loosen the muscles, and ease the strong pull to sleep. That small drop in pressure can lift focus and energy. It can feel like a reset, not a full sleep.

Where the “heavy feeling” comes from

The hard part is waking from deep sleep. When waking happens there, a person can feel slow, foggy, and clumsy for a while. That state has a name: sleep inertia. It is not a moral failure. It is a normal brain shift from sleep to wake.

A practical rhythm without strict rules

A short nap can be chosen for quick clarity. A longer nap can be chosen for deeper recovery, but only when there is real time and room for it. One quiet detail often changes everything: how long it takes to fall asleep. If falling asleep takes time, the plan needs to include that hidden gap.

A small Dutch lesson

Dutch is the language of the Netherlands (Europe). Here are two short lines that fit a nap moment.

Phrase: Ik doe even mijn ogen dicht.
Simple meaning: I close my eyes for a moment.
Word by word: Ik = I; doe = do; even = just; mijn = my; ogen = eyes; dicht = closed.

Phrase: Ik ga even liggen.
Simple meaning: I lie down for a moment.
Word by word: Ik = I; ga = go; even = just; liggen = lie down.

Conclusions

A gentle ending

A nap does not need to be perfect to help. The best nap is often the one that matches the moment: short for clarity, longer for deeper rest, and always shaped by how quickly sleep arrives.

Selected References

Links

[1] National Library of Medicine, NCBI Bookshelf: Physiology, Sleep Stages (StatPearls) — https://www.ncbi.nlm.nih.gov/books/NBK526132/
[2] PubMed Central: Sleep inertia and sleep drunkenness (Trotti) — https://pmc.ncbi.nlm.nih.gov/articles/PMC5337178/
[3] Harvard Health Publishing: The science behind power naps — https://www.health.harvard.edu/staying-healthy/can-a-quick-snooze-help-with-energy-and-focus-the-science-behind-power-naps
[4] U.S. Centers for Disease Control and Prevention (North America), NIOSH: Fatigue Prevention for Pilots (training) — https://www.cdc.gov/niosh/docs/2016-162/training.html
[5] TED (YouTube): Sleep Is Your Superpower — https://www.youtube.com/watch?v=5MuIMqhT8DM

Appendix

A–Z

Deep sleep. A stronger, slower stage of non-rapid eye movement sleep, where waking can feel harder and heavier.

Light sleep. A gentler stage of sleep, where waking is often easier than waking from deep sleep.

Nap. A short sleep taken during the day, often used to restore alertness.

Power nap. A brief nap that aims to refresh without drifting far into deep sleep.

Rapid eye movement sleep. A sleep stage linked with rapid eye movements and vivid dreaming in many people.

Sleep cycle. A repeating pattern of sleep stages that commonly lasts around ninety to one hundred ten minutes, but can vary.

Sleep inertia. The groggy, slow feeling after waking, especially after deep sleep or when sleep is cut short.

Sleep latency. The time it takes to fall asleep after lying down.

Sleep pressure. The build-up of sleepiness during time awake, which can ease after rest, even brief rest.

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