10,000 Matching Annotations
  1. Jan 2024
    1. each week
      • The guidelines for children activity should be one hour moderate or vigorous physical activity daily, not weekly.

      This information is communicated on the CDC website (below) and in Physical Guidelines for Americans, second edition, page 48. This is also stated in the WCRF and AICR "Recommendations and public health and policy implications," page 20. https://www.wcrf.org/wp-content/uploads/2021/01/Recommendations.pdf

      CDC. How much physical activity do kids need? Accessed January 16, 2024. https://www.cdc.gov/physicalactivity/basics/children/index.htm#:~:text=Children%20ages%203%20through%205,for%2060%20minutes%20every%20day.

      • Under "Cancer prevention," the guidelines for children activity should be one hour moderate or vigorous physical activity daily, not weekly.

      This information is communicated on the CDC website (below) and in Physical Guidelines for Americans, second edition, page 48. This is also stated in the WCRF and AICR "Recommendations and public health and policy implications," page 20. https://www.wcrf.org/wp-content/uploads/2021/01/Recommendations.pdf

      CDC. How much physical activity do kids need? Accessed January 16, 2024. https://www.cdc.gov/physicalactivity/basics/children/index.htm#:~:text=Children%20ages%203%20through%205,for%2060%20minutes%20every%20day.

    1. One of the most useful models for understanding public speaking is Barnlund’s (2008) transactional model of communication. In the transactional model, communication is seen as an ongoing, circular process. We are constantly affecting and are affected by those we communicate with.

      Transactional model

    2. This three-part model was intended to capture the radio and television transmission process. However it was later adapted to human communication and is now known as the linear model of communication.

      linear model

    1. What are the personal, professional and public benefits of enhancing your public speaking skills?

      Question 1 Personal: Helps me to feel more comfortable communicating. Professional: Helps me to be more proficient while communicating tasks. Public: Helps me to express ideas more clearly.

    1. Look at this picture, and notice your first reaction. Do you have an emotional reaction, good or bad? What is your opinion right off the bat? Going with your gut, what do you think? Notice I am asking you about two things: (1) your emotional reaction and (2) your first thought.

      My first reaction to this picture is that I would agree with the poster. Being able t dream about big things that you want to happen to yourself if great, because you are setting that goal for yourself and you are going to do everything and anything you can to achieve that goal.

    1. Van der Waals forces arise from the spontaneous and/or induced transient polarization of molecules.

      A weak intermolecular force that change according to the distance of molecules or atoms

    2. in contrast to an ionic interaction in which electrons remain on each atom of an ion or are transferred between species that have highly different electronegativities.

      What causes a covalent bond? and where are the electrons coming from?

    3. We describe one such property, the tendency of an atom to attract electrons, by the chemical concept and term, electronegativity.

      As you move from left to right on the periodic table electronegativity is increasing

    1. After the Egyptian and Indian, the Greek and Roman, the Teuton and Mongolian, the Negro is a sort of seventh son, born with a veil, and gifted with second-sight in this American world, — a world which yields him no self-consciousness, but only lets him see himself through the revelation of the other world. It is a peculiar sensation, this double-consciousness, this sense of always looking at one’s self through the eyes of others, of measuring one’s soul by the tape of a world that looks on in amused contempt and pity.

      1

    2. SociologySociology is the systematic study of society and social interaction. In order to carry out their studies, sociologists identify cultural patterns and social forces and determine how they affect individuals and groups. One way sociology achieves a more complete understanding of social reality is through its focus on the importance of the social forces affecting our behavior, attitudes, and life chances. This focus involves an emphasis on social structure, the social patterns through which a society is organized. Sociology provides a lens for understanding the human condition and the structural forces that influence our behavior and attitudes.

      Come back to this part

    1. Review some of the demands from the Third World Liberation Front in Section 1.2 of this chapter. Do any of these resonate with your experience on our own campus? What demands would you make of your administration? How would you modify or update these demands for your own context? When reviewing the demands from the Third World Liberation Front none of these demands resonate with my experience on campus.

    1. Argument can help us gain power in society as well.

      Very true depending on the topic because majority of topics can become very controversial

    2. But why does academia make writing so central?

      Academia makes writing so central because it is a big part of the system. Without writing, many parts of the world wouldn't be able to get most of the things that they do done.

    3. why do so many professions depend on it?

      Many professions depend on writing because they are able to express themselves more and better than just trying to explain it out loud. They are also able to brainstorm and think about what they want to write, instead of trying to come up with something and saying it.

    1. ogether can predict the geometry of each atom in a molecule. The main idea of VSEPR theory is that pairs of electrons (in bonds and in lone pairs) repel each other. The pairs of electrons (in bonds and in lone pairs) are called "groups". Because electrons repel each other electrostatically, the most stable arrangement of electron groups (

      i hate niggas

    1. When protic solvents are used in nucleophilic substitution reactions, the positively polarized hydrogen of the solvent molecule can interact with the negatively charged nucleophile. In solution, molecules or ions that are surrounded by these solvent molecules are said to be solvated. Solvation is the process of attraction and association of solvent molecules with ions of a solute. The solute, in this case, is a negatively charged nucleophile.

      What happens to Nu ' in a polar protic solvent.

    1. One of the challenges for students learning chemistry is recognizing that the same symbols can represent different things in the macroscopic and microscopic domains, and one of the features that makes chemistry fascinating is the use of a domain that must be imagined to explain behavior in a domain that can be observed.

      I think this is important to understand to try and prevent any common mistakes from occurring in the future.

    1. Many OH compounds in living systems are formed by alkene hydration. Here is an example that occurs in the Krebs cycle: fumarate is hydrated to form malate. In addition to its preparation from ethylene, ethanol is made by the fermentation of sugars or starch from various sources (potatoes, corn, wheat, rice, etc.). Fermentation is catalyzed by enzymes found in yeast and proceeds by an elaborate multistep mechanism. We can represent the overall process as follows:

      very important

  2. Dec 2023
    1. Example 3.1.2

      Derive 3 times and resulting to zero has to be any polynomial with the highest power being 2, therefore any collection that has a power of less than 2 will do the job. Therefore vector space P2 is correct.

    1. Personality Theory: The 4 Facets Extroversion-Introversion (EI): how you get your energy and where you prefer to focus your attention Sensing-Intuition (SN): how you take in information about the world around you Thinking-Feeling (TF): how you like to make decisions Judging-Perceiving (JP): how you prefer to organize your life Complete the following activity to identify your personality type based on your own self reflection. As part of the course requirement, you will also be taking the MBTI personality test through our career center. Please check the syllabus for instructions. You can complete the following quick activity to self identify your personality type. Then compare the results with the actual MBTI assessment to see how your results are similar and different. Activity 4.1: What’s Your Type? Read descriptions for the four facets. Pick which is more like you. E (Extraversion) or I (Introversion)? S (Sensing) or N? (Intuition)? T (Thinking) or F? (Feeling)? J (Judging) or P? (Perceiving)? Could be described as: Talkative, outgoingLike to be in a fast-paced environmentTend to work out ideas with other, think aloudEnjoy being the center of attention Then you prefer (E) Extraversion Could be described as: Reserved, privatePrefer a slower pace with time for contemplationTend to think things through inside your headWould rather observe then be the center of attention Then you prefer (I) Introversion Could be described as: Focus on the reality of how things arePay attention to concrete facts and detailsPrefer ideas that have practical applicationsLike to describe things in a specific, literal way Then you prefer (S) Sensing Could be described as: Imagine the possibilities of how things could beNotice the big picture, see how everything connectsEnjoy ideas and concepts for their own sakeLike to be describe in a way figurative, poetic Then you prefer (N) Intuition Could be described as: Make decision in an impersonal way, using logical reasoningValue justice, fairnessEnjoy finding the flaws in an argumentsCould be described as reasonable, level-headed Then you prefer (T) Thinking Could be described as: Base you decision on personal values and how our actions affect othersValue harmony, forgivenessLike to please others and point out the best in peopleCould be described as warm empathetic Then you prefer (F) Feeling Could be described as: Prefer to have matters settledThink rules and deadlines should be respectedPrefer to have a detailed step-by-step instructionsMake plans, want to know what you’re getting into Then you prefer (J) Judging Could be described as: Prefer to leave your options openSee rules and deadlines as flexibleLike to improvise and make things up as you goAre spontaneous, enjoy surprise and new situations Then you prefer (P)Perceiving What is your 4-letter personality type? __ __ __ __ The following are brief descriptions of the 16 personality types from Humanmetrics. Click on your personality type or a similar type to see which describes you best. The 16 personality types ESTJ ISTJ ENTJ INTJ ESTP ISTP ENTP INTP ESFJ ISFJ ENFJ INFJ ESFP ISFP ENFP INFP

      Activity 4.1: What's Your Type?

    1. Part 2:

      5.Not necessarily. I think It depends on what the individual focuses on learning. It is better to support and develop according to personal preferences.

    2. Part 1: 3. To help listeners understand the importance of creativity. To help listeners understand that different people learn in different ways.

    1. Not all Collisions are Sufficiently Oriented

      Even if two molecules collide with sufficient activation energy, there is no guarantee that the collision will be successful.

    1. In an electrolytic cell this is the positive electrode. Here the electrode sign is not being determined by the cell reaction, but by the external power supply that is driving the reaction in the nonspontaneous direction

      I was confused about this at first especially in lab. But it does make sense how the more " positive " it is, the absence of electrons causes for the reaction to move to the direction of nonspontaniety.

    1. La distribution normale crée des intervalles de confiance précis lorsqu'elleσσ\sigma est connue, mais elle n'est pas aussi précise lorsque s est utilisé comme estimation. Dans ce cas, la distribution t de Student est bien meilleure. Définissez un score T à l'aide de la formule suivante :t=x¯¯¯−μs/n√t=x¯−μs/n

      On utlise Student quand n est plus que 30 si non on peut approximer que la variable suit une loi normale et utiliser s comme écart type

    1. The eight key characteristics of life are:

      Order all cells are remarkabl complex with atoms that make up molecules > cell organelles and other cellular inclusions. In multicellular organisms, similar cells form tissues > tissues collaborate to create organs > organs work together to form organ systems.

      Sensitivity or Response to Stimuli Organism an respond to diverse stimuli. Movement toward a stimulus is considered a positive response, while movement away from a stimulus is considered a negative response

      Reproduction Single called organisms : reproduce by duplication of DNA by the cell dividing to form to new cells Multicellular organisms : produce speacilized reproductive germline cells that form new individuals

      Growth and Development Organisms grow and develop from specific instructions coded by their genes

      Regulation All organisms, big or small, require multiple regulatory mechanisms to coordinate internal functions, the response to stimuli/coping of environmental stresses.

      Homeostasis Cells have to appropriate conditions such as proper temperature, pH, and appropriate concentration of diverse chemicals in order to function properly. A well known example of this is the thermoregulation of an organism that needs to regulate body temperature.

      Energy Processing All organisms use a source of energy for their metabolic activities.

      Evolution In an environment the population of organisms contribute to reproduction and survival from their advantageous traits that grow to become more common, hence become beneficial for the species.<br /> Evolution is the cause of biodiversity. The adaptations, or advantageous traits, can be structural, behavioral, or psychological.

    1. Two types of science: basic science and applied science

      Basic science or “pure” science is the science that seeks to expand nowledg regardlesss of the short-term application of that knowledge. Although it is just the gaining of knowledge, basic science can still result in practical application in the end.

      Applied science or technology uses science to solve real-world issues. In applied science, the problem is usually defined for the researcher.

      Most people perceive basic science as “useless.” However, taking a careful look at history in science, basic science reveals basic knowledge has resulted in many remarkable applications of great value. Some scientists think that applied science relies on the results generated through basic science and other scientists think that it’s time to move on from basic science and find solutions to actual science.

      While research efforts in both basic science and applied science are usually carefully planned, it is important to note that some discoveries are made by serendipity; that is, by means of a fortunate accident or a lucky surprise.

    1. Writing the Draft Business Plan

      To summarize, when writing a draft business plan, it is suggested to follow these steps:

      1. Use the headings feature in Word to create an outline for your business plan and generate a table of contents automatically.
      2. Incorporate relevant parts of your initial research into your business plan template either by copying and pasting or by inserting the results into the appropriate sections.
      3. Include societal-level and industry-level analyses in the Operating Environment section, market-level analysis in the Marketing Plan, and firm-level analysis across all sections of the business plan.
      4. Incorporate your business model elements into the relevant sections of your plan as there is no specific section for describing the business model.
      5. Fill in as much relevant information as possible under the headings on your business plan template, using information from specific sources or assumptions you made.
      6. Clearly indicate the sources of information, such as supplier catalogs or industry experts, to establish credibility and improve professionalism.
      7. Highlight assumptions in a distinct font color and ensure to replace them with sourced information later.
      8. Use spreadsheet templates to record estimated sales revenue each month, based on well-reasoned criteria and set up with formulas for easy changes.
      9. Flag numbers based on assumptions in a distinct font and clearly indicate the sources of actual numbers.
      10. Use the spreadsheet templates to develop the financial component of your business plan.

      By following these practices, you can effectively write a draft business plan that is well-supported, credible, and includes the necessary financial projections.

    1. Biology: “the study of life” Unifying concepts that govern he study and research of the broad scope in biology - the cell is the basic unit of life - genes (consisting of DNA or RNA) are the basic unit of heredity - evolution accounts for the unity and diversity seen among living organisms - all organisms survive by consuming and transforming energy - all organisms maintain a stable internal environment

      collective research indicates the first forms of life on Earth were microorganisms that existed for billions of years before the evolution of larger organisms. (Like modern appearing humans like Homo sapiens that are relatively new species, having inhabit aged this planet for only the last 200,000 years.

      19th century - number of biologists pointed to the central importance of the cell 1838 - Scientists Schleiden and Schwann made the now universal ideas of the cell theory 1953 - discovery of the double helical structure of DNA marked the transition to the era of molecular genetics

      Science is a learning process about the natural world with collective data and research from contributing scientists. These contributions make science an iterative, or cumulative, process. Previous research is used as the foundation for new research making the understanding of any issue in the sciences as a culmination of all previous work. Science also refers to the body of knowledge produced by scientific investigation.

      Peduoscience/alternative science: a belief presented as scientific although it is not a product of scientific investigation. Lacks the rigor of the scientific method which makes carefully-controlled and thoughtfully interpreted experiments.

    1. 3.to encourage people to reduce the amount of trash they make. to teach people to make their own products. Because the video teach people how to do some thing to Protect the environment.

    1. CaCO(s)⟶CaO(s)+

      i don't think this reaction can be balanced. I also don't think CaCO is a thing.

      If the chemical is meant to be CaCO3, the equation makes much more sense.

  3. Nov 2023
  4. chem.libretexts.org chem.libretexts.org
    1. 6.3. Distribution of sample mean \(p\) for Bernoulli RV.

      1. Sample n points and construct new Binomial RV \(Y = X_1 + \cdots + X_n\). Note \(Y \sim Binomial(p,n)\) with \(\mu = np,\sigma = np(1-p)\).
      2. \(Y\) can be approximated by \(N(np,npq)\) if \(\mu \pm 3\sigma \in (0,n)\), see Wikipedia.
      3. Hence \(Y/n\) ca be approximated by \(N(p,pq/n)\), if \(\mu\pm 3\sigma \in (0,n)\) or \(p \pm 3\sqrt{pq/n} \in (0,1)\).
      4. sample mean \(\hat{p} = \mu_X = \mu_{\bar{X}} = E(\bar{X})\) is
    1. 1.1. BASICS

      1. Population and Sample: Whole set and subset.
      2. Parameter and statistic: Numeric property of Population and Sample respectively.
      3. Descriptive and Inferencial Statistics: Describe sample data and infer about population from sample data.
      4. Qualitative and Quantitive data: Non numeric and numeric.

      1.2. Three main tasks

      Assume "Random Sample" 1. Parameter Estimation. 2. Confidence Interval for Parameter 3. Hypothesis Testing

      2.1. Data Display:

      1. stem and leaf diagrams,
      2. frequency histograms,
      3. relative frequency histograms. (PMF or PDF)
      4. Commulitive frequency graph. (CDF)

      2.2. Measure of central tendancy

      1. Popupation Mean and sample mean
      2. Population Median and sample median
      3. Population mode and sample mode
      4. relation between mean and median gives skewness: left skewed vs right skewed

      2.3. Variability

      1. Range
      2. sample Variance and sample standard deviation. Note denominator.
      3. Population variance and standard deviation.

      2.4. Relative position

      1. Percentile: Pth percentile is $$F_X^{-1}\Big(\frac{P}{100}\Big)$$
      2. Quartile: Q1,Q2,Q3.
      3. Box plot: Also called five number sumarry $${ X_{min}, Q_1, Q_2, Q_3, X_{max} }$$
      4. IQR = Q3-Q1
      5. Z-score. for population and sample $$z(x) = \frac{x-\mu}{\sigma}$$ $$z(x) = \frac{x-\bar{x}}{s}$$

      2.5.1. The Empirical Rule: Assume Data have normal distribution. 1. approx 68% data is in \(\mu \pm \sigma\) 2. approx 95% data is in \(\mu \pm 2\sigma\) 3. approx 99.7% data is in \(\mu \pm 3\sigma\)

      2.5.2. Chebyshev's Theorem: For any distribution, at least \(1-\frac{1}{k^2}\) of the data is in \(\mu \pm k\sigma\)

    1. the Greeks of the Classical Era usually idealized the subjects of art, the Romans came to prefer more realistic and “honest” portrayals.

      and the differences emerge

    1. During synaptic plasticity the number and shapes of dendritic spines undergo radical reorganizations. Long-term potentiation (LTP) induction promotes spine head enlargement and the formation and stabilization of new spines. Long-term depression (LTD) results in their shrinkage and retraction."

      very important. Here we see the difference in effect each process has in the body.

    2. he morphology of spines in developing neurons is affected by synaptic activity, hence contributing to the experience-dependent refinement of neuronal circuits, learning, and memory.

      relating to the idea of the role of dendtric spines in relation to learning and memory formation.

    3. "In a developing brain, spines exhibit a high degree of structural and functional plasticity, reflecting the formation and elimination of synapses during the maturation of neuronal circuits.

      speaking on the idea of the theory associated with his section.

    1. : \[\begin{aligned} \Naturals ~~&=~~ \text{the set of all \textbf{natural} numbers, i.e. the set of nonnegative integers: } 0, 1, 2, 3, 4, \ldots\ \[6pt] \Integers ~~&=~~ \text{the set of all integers: } 0, \pm 1, \pm 2, \pm 3, \pm 4, \ldots\ \[6pt] \Rationals ~~&=~~ \text{the set of all \textbf{rational} numbers $\frac{m}{n}$, where $m$ and $n$ are integers, with $n \ne 0$}\ 6pt] \Reals ~~&=~~ \text{the set of all real numbers}\end{aligned} \nonumber

      HTML formatting is incorrect and renders the formula unusable. This is probably due to following the ":" symbol.

    2. : \[\begin{aligned} \text{instantaneous velocity at $t$} ~~&=~~ \text{limit of average velocity over $\ival{t}{t+\Delta t}$ as $\Delta t$ approaches to 0}\ \[6pt] &=~~ \lim_{\Delta t \to 0} ~\frac{\Delta s}{\Delta t}\ \[8pt] &=~~ \lim_{\Delta t \to 0} ~(-32t ~-~ 16\Delta t)\ \[6pt] &=~~ -32t - 16(0)\ 6pt] &=~~ -32t\end{aligned} \nonumber

      HTML formatting is incorrect and renders the formula unusable. This is probably due to following the ":" symbol.

    3. s(t)=−16t2+100s(t) = -16t^2 + 100: \[\begin{aligned} \dfrac{\Delta s}{\Delta t} ~~&=~~ \dfrac{s(t + \Delta t) ~-~ s(t)} {\Delta t}\ \[8pt] &=~~ \dfrac{-16(t+\Delta t)^2 ~+~ 100 ~-~ (-16t^2 ~+~ 100)}{\Delta t}\ \[8pt] &=~~ \dfrac{-16t^2 ~-~ 32t\Delta t ~-~ 16(\Delta t)^2 ~+~ 100 ~+~ 16t^2 ~-~ 100}{\Delta t}\ \[8pt] &=~~ \dfrac{-32t\Delta t ~-~ 16(\Delta t)^2}{\Delta t} ~~=~~ \dfrac{\cancel{\Delta t} \,(-32t ~-~

      HTML formatting is incorrect and renders the formula unusable. This is probably due to following the ":" symbol.

    1. It is the retinal molecule that changes its conformation when absorbing a photon, resulting in a conformational change of the surrounding protein and the proton pumping action.

      proton pumping action을 만들고 주변 단백질(bacteriorhodopsin)의 구조적 변화를 일으키는 것은 바로 retinal protein

    1. Structures F and G are achiral.

      The red star indicating a chiral carbon on structure F is wrong. The red star should instead be on structure E on the carbon that is attached to the chlorine atom.

    1. Milestones represent what most children can do by specific ages; however, it is important to remember that children do not achieve these milestones at the same exact ages—milestones only represent the average age at which they are achieved. If a child has not achieved specific milestones by a specific age, it does not necessarily suggest a delay or disability; however, there are specific ages where if certain milestones are not achieved, caregivers should encourage the child’s parents to commu

      ai

    1. We see the sky as blue during the day because violet and blue light scatter to a greater extent than other, longer wavelengths of light.

      The less longer Waveleght, the more efficiency the light

    1. Critical Point – the point in temperature and pressure on a phase diagram where the liquid and gaseous phases of a substance merge together into a single phase. Beyond the temperature of the critical point, the merged single phase is known as a supercritical fluid.

      Density of Vapor is great equal to density of liquid

    1. The Pvap reaches a value that is equal to the atmospheric pressure (Patm). When these two pressures are equal the vapor bubbles quickly rise to the surface because they are less dense than the liquid itself and the liquid is said to be boiling.

      At boiling point atmospheric pressure equals vapour pressure

    1. How you sit is communicating to us. The things that you attach to yourself—a purse, a pen, a fancy car—all these things are communicating. How you look at others communicates

      Everything is a form of communication weather you know it or not

    2. example

      the importance of nonverbal communication this made me think about my childhood and how my mom would teach me how even through I didn’t mean to say something in a hurtful way that some other people might take it differently

    1. How to draw lewis structure of a molecules. Covalent bonds forms molecule. 1. Identity the types of reaction 2. Find the number of valance electrons with lone pair and draw it around symbols. 3. Share the electron so both side have octate configuration. 4. To check the correctness, sum the total number of electrons you draw and divided it by 2. The result should be the total number of bonds there including lone pair.

    1. How to draw Lewis dot structures (for Ionic compound) 1. Identify whether the reaction is going to Ionic or Covalent. Ionic reaction is going to occur between metal and non-metal. 2. Draw the valance electron (outermost electrons) around symbols. 3. Show the exchange of electrons by adding it from metal to non-metal to reach stable electronic configuration.