Thursday, December 26, 2019

Why We Should Not Sleep - 1657 Words

Why We Should Not Sleep in? Why some of us sleep in? The very reason why some are over sleeping, it is because of sleep deprivation and because of that, they are so sleepy and they think that sleep in will retrieve the incomplete time of sleeps to recover. Over sleep in the morning or sleep in is mainly cause by series of sleepless nights, not enough, and not getting the real quality of sleep. Sleep deprivation affects our immune system like stress. The immune system is altered in similar ways by lack of sleep and physical stress, resulting to a possible connection to chronic diseases like obesity and diabetes The reason why we should not sleep in later in the morning because this practice often decreasing and emptying the bucket of our hearth, as time goes by and that makes us feel unhealthy and unproductive and it somehow stops us to do less of our daily living tasks and our life duties, which are the things that always give us the good feeling of a successful completion of not only our living tasks to do, bu t life accomplishment duties to be done per se. Making up for inadequate sleeps by way of sleep in will result to a very serious health problem. So, it is best to change the habit of sleeping and it is still the best to do it at night because it’s the most perfect time to attain the quality and adequate sleep to make feel better to gain the essential benefit for the healthy heart, weight, mind and more. Rising early is a respond warmly to fill our buckets of ourShow MoreRelatedWhy Do We Need Sleep?1713 Words   |  7 PagesWhy Do We Need Sleep? Typed By: Miracle Taylor Regulating sleep is something our bodies do that is as natural as eating, drinking, and breathing. This implies that sleeping serves a similar role in our health and well being. Even though it is difficult to answer the question â€Å"Why do we need sleep?† scientists have developed several theories that may explain why we spend a third of our lives sleeping. Comprehending these theories can help expand our appreciation of the functionRead MoreSleep Deprivation : Symptoms And Can Lower Your Body s Natural Defense System Essay1362 Words   |  6 Pageswhen they felt a little sleep deprived; there was a time in their life when they felt more tired than usual. It was either just a busy work week, or one night accidentally stayed up a few hours longer, but college students bring a new meaning to sleep deprivation. We are reported to be the highest number of sleep deprived people. Sleep deprivation comes in two stages: chronic and acute, whichever category, both come with extreme side-effects. The effects of chronic sleep deprivation form long-lastingRead MoreWhy School Should Start Later816 Words   |  4 PagesWe live in an age when many growing adolescents are constantly fighting their natural body clocks. It could potentially be one of the biggest issues facing our high school systems. Many school’s across America have started to push back their school start times. Is it worth it? The answer is yes. School should start later in order to unlock our nation’s high school potential. One of the reasons that school should be started later is because it does not give growing teens enough time to sleep. SleepRead MoreSleep Disorders1112 Words   |  5 Pagesbut if we not sleep, we cant live an ordinary life and maintain health. For this crucial time, there shouldn’t be any disturb to get good sleep. There are various kind of sleep disorder such as insomnia, Sleep apnea or Narcolepsy, which are enemies of good night sleep. In this report, I would like to cover the importance of good, proper sleep to overcome various sleep disorders and why sleeping in the dark is crucial for human. In addition, the reason why I put this sub topic, why we should sleepRead MoreWhy Do We Sleep? Essay618 Words   |  3 Pagesâ€Å"Why do we sleep?† is a very popular questions that many humans ask today. Sleep is very sufficient to the human body. If it was not important, then God would not have designed for a third of our life to be occupied by sleep. During this time per iod, many people are interested to know what is a good amount of sleep and what are the harmful effects to not getting enough sleep. The question â€Å"why do we sleep?† is a very difficult question to answer. One way to think about why sleep is important isRead MoreThe Health Benefits Of Getting More Sleep857 Words   |  4 Pagesknew that we sleep 24 years in a lifetime? Well let me tell you that there is a lot of people that sleep less than 24 years. Today I will present to you some of the surprising health benefits of getting more sleep And how with more sleep you can succeed in business and life On the contrary I will also tell you why you shouldn’t get to much sleep. Then I will have some time for questions is you have any Then I will finally conclude my presentation So let’s get started. To begin with sleep givesRead MoreSleep Is A Periods Of Reduced Activity948 Words   |  4 PagesIntroduction: We spend about eight hours of the day asleep and spend almost one third of our time on earth asleep! So exactly what is sleep? Sleep is a period of reduced activity. During sleep the body changes internally and externally. It rejuvenates and restores the body, and it follows a predictable pattern consisting of infiltrating Non-REM and REM sleep. Review of Research: Sleep is usually a time where the body is at a lying down position with the eyes shut. The outcome of sleeping is whenRead MoreTaking a Look at Sleep Paralysis690 Words   |  3 Pagesor even move. This helpless â€Å"nightmare† can also be known as Sleep Paralysis. A condition which people experience a terrifying paralyzing feeling throughout their body in between the state of rest and awakening; often seeing troubled things. Since when I was young I would have some experiences with sleep paralysis. Due to the unusual experiences, I became interested to research the topic and took my time to read about it more. Sleep paralysis, occurs with the most normal sleeper, so it’s possibleRead MoreThe Theory, The Energy Conservation Theory1419 Words   |  6 PagesIntroduction: what is sleep: Sleeping is something that most creatures of the animal kingdom have in common. A period of time where the body seemingly ceases to function. The average human is supposed to sleep 7-8 hours a day, and although this varies from species to species, the core function stays the same.The dictionary definition of sleep is â€Å"the natural state of rest during which your eyes are closed and you become unconscious†.(Sleep, n.d.) Although it seems like nothing is happening whenRead MoreWhy School Should Start Later1531 Words   |  7 Pagesmakes me super tired. School starts way too early! Should students have to wake up at unreasonably early times just to get to school on time? No, they shouldn t and school should start later because it causes many risks and problems in students lives. There are many reasons that school should start later, but the main reason is because students don t get enough sleep and are tired which causes a lot of problems. Some of the results of sleep dep rivation are that it negatively impacts students

Wednesday, December 18, 2019

Critique of the Behavioral Study of Obedience - 593 Words

Critique of the Behavioral Study of Obedience Dr. Stanley Milgram was an American Social Psychologist who conducted the Behavioral Study of Obedience in 1963. Dr. Milgram conducted the study to assess the conflict between obedience to authority and personal conscience. The subjects of the study were recruited from various occupations including, but not limited to, laborers and engineers. Dr. Milgram hoped to learn about the circumstances in which people would carry out the commands of authority figure and when will they refuse to obey (citation). The research methods used in the Behavioral Study of Obedience were experiments and observation. The results of the experiment concluded that the participants were obedient to the orders and conformed to their assigned â€Å"role† quickly and without question. The research methods used in the study conducted by Dr. Milgram were experiment and observation. The subjects of the study were recruiting using a newspaper advertisement and direct mail solicitation. The participants believed they were going to take part in a study of memory and learning at Yale University. There were a total of 40 male participants between the age of 20 and 50. The participants would act as teachers under direction of an experimenter and would be instructed to deliver shocks to their students if they answered a question wrong. The shocks were delivered from a machine that ranged from 15 volts to 450 volts. The experimenter was dressed in a technician coatShow MoreRelatedCritique of Stanley Milgram’s â€Å"Behavioral Study of Obedience†905 Words   |  4 PagesA Critique of Stanley Milgram’s â€Å"Behavioral Study of Obedience† Stanley MIlgram is a Yale University social psychologist who wrote â€Å"Behavioral Study of Obedience†, an article which granted him many awards and is now considered a landmark. In this piece, he evaluates the extent to which a participant is willing to conform to an authority figure who commands him to execute acts that conflict with his moral beliefs. Milgram discovers that the majority of participants do obey to authority. InRead MoreInvestigating The Nature Of Obedience1678 Words   |  7 Pages Investigating the Nature of Obedience Stanley Milgram managed to conduct the experiment that revealed the distinct features of the members of our society. He questioned how millions of ordinary people in Germany could obey the immoral commands of the Nazi government and provided the study exploring the mechanisms of human obedience to authorities. Though Milgram’s experiment has provoked a huge amount of criticism, the analysis of internal and external validityRead MoreBehavioral Study Of Obedience By Stanley Milgram1053 Words   |  5 Pages â€Å"Behavioral Study of Obedience† by Stanley Milgram (1963) Stanley Milgram Yale University Group 1: Wasis Ali, Christopher Okpala, Michelle Walden, Estefany Majano General Psychology 1010 Ms. Thompson Spring Semester, March 17, 2014 Introduction In 1961, The Journal of Abnormal and Social Psychology published an article by Stanley Milgram, a researcher at Yale University, and his study testing obedience towards political influence vs towards morals and values taught from an early ageRead MoreSocial Identity Theory And Fees Must Fall Protests Essay1257 Words   |  6 Pagesfollowing the â€Å"trend† of the group. If majority of the group wants to do something, but one individual does not, the individual will go along with the group in order to protect identity as a member of the group. The #feesmustfall protests highlight this obedience exceptionally well. When students started protesting for free Tertiary education, students from all over the country engaged in action. This unifying movement allowed for students to join together creating an in-group (the students) and an out-groupRead MoreThe Theory Of Psychology And Psychology859 Words   |  4 PagesThroughout long history of psychology, there are many brilliant and remarkable psychologists who grew psychology longing as 21st century, today. They have contributed many theories, ideas, and experiments that made study of human mind and behavior much more noble and interesting. As psychology grow older and older, there are many different types of branches that were created, such as psychoanalysis, behavior, cognitive, evolutionary, and developmental. Each branches have changed way society worksRead MoreKohlberg s Theory Of Moral Development1450 Words   |  6 Pages â€Å"Kohlberg developed six stage theory of moral development, and then he group them six into three. Which are higher-order levels of development: Level 1- Pre- Conventional morality which have two stageies 1- obedience and punishment, 2- Individual interest: behavior driven by self-interest and rewards. Level 2- Conventional morality two stageies are 1- interpersonal: behavior driven by social approval, 2- Authority: behavior driven by obeying authority: behavior driven by obe ying authority and conformingRead MoreChristian /Counseling2553 Words   |  11 Pagesis a true sign of maturity and sincerity. In the text Dr. Crabb stated, â€Å"A counselor must help the client to move over the pathway of obedience. Which he calls the OVER goal, the goal is to help the client respond biblically to problem circumstances, to â€Å"move over. Dr. Crabb also noted, â€Å"The change must be not only external obedience, but also an inward newness, a renewed way of thinking and perceiving, a changed set of goals, a transformed personality called the UP goal† (Crabb,Read MoreDiana Baumrind2963 Words   |  12 Pagesresearch to families and therapy groups. By 1960 Baumrind was a clinical and developmental psychologist at the Institute of Human Development at the University of California, Berkeley. She is well known for her research on parenting styles and for her critique of deception in psychological research. Baumrind is a recipient of the G. Stanley Hall Award and an NIMH Research Scientist Award. Baumrind work on research design, socialization, moral development, and profe ssional ethics is unified by her beliedRead MoreThe Impact Of Parenting Styles On A Child s Development2645 Words   |  11 Pagesintrigued me and prompted my self reflection of how my immigrant parents parenting practices affected my development. From my experience, I believe immigrant parents are more likely to display authoritarian versus authoritative parenting styles. â€Å"Studies have shown that parents of individualistic cultures (i.e. western cultures) are more likely to be authoritative, whereas parents of collectivistic cultures (i.e. non-western cultures, including Asian, African, and Hispanic) that have immigrated toRead MoreCollegiality: Attribute, Theory or Impossibility?3600 Words   |  15 PagesTheory? 4 Introduction 4 Collegiality in the Professional Arena 5 Collegiality and Academia 5 Collegiality and the Medical Profession 6 Collegiality and the World of Law 7 Collegiality vs. Classic Management Theory 8 Collegiality and Behavioral Theory 8 Collegiality and Bureaucratic Theory 9 Discussion 10 Conclusion 13 References 17 Collegiality – Attribute or Theory? Introduction Collegiality is both a professional attribute and a management theory. While defining collegiality

Tuesday, December 10, 2019

Annotated Bibliography The Future of Education Technology Essay Example For Students

Annotated Bibliography: The Future of Education Technology Essay Abstract The future state of technology-based learning involves changing technologies, software and hardware solutions, and varying technology-based learning techniques. The first article, Station; Ready for Engaging Reading Instruction on the Pad? Shows the future to technology-based learning with I-to-I technology, bring your own device (BOYD) approaches, and mobile computer labs. The second article, Raytheon Company; HIGH, Raytheon Launch Nationwide PBS Learnings Program Integrating Engineering in K-12 Classrooms shows the future of technology-based in offering new technology-based programs. The final article New All-Digital Curriculums Hope to Ride High-Tech Push In Schoolrooms shows the future of technology-based learning with all-digital curriculums. Annotated Bibliography Station: ready for engaging reading instruction on the pad? (2014). Education Letter, 51 _ Retrieved March 16th 2014 from: http://search_protest. Com/deceive/ 1504209865? Accounted-28844 An anonymous News Reporter-Staff News Editor at Education Letter wrote this article. It describes a new trend in education technology called I-to-I technology, bring your own device (BOYD) approaches, and mobile imputer labs. As an elementary educator, It Is Important to offer Innovative educational technology. The article focuses on Station Reading. It is a computer- adaptive reading instruction app on the Pad. Station Reading Is a comprehensive computer-based reading program that integrates explicit, direct and systematic instruction into subject-area content while focusing on critical skills within the five key reading areas. station Reading offers a money saving solution for cash strapped schools. My school Is both cash strapped and uses the bring your own device (BOYD) approach. This app would allow my school to move too better reading program. I believe that the torture to education technology allows tort a more innovative educational technology in classrooms. Raytheon company: HIGH, Raytheon launch nationwide PBS Learnings program integrating engineering in K-12 classrooms. (2014). Education Letter, 79. Retrieved March 16th, from http://search. protest. Com/docile/1504209204? Accounted=28844 An anonymous at News Reporter-staff News Editor at Education Letter wrote this article. It describes a new trend in education technology introducing new subjects in K-12. As an elementary educator, is important to offer Innovative educational programs to students. The article focuses on HIGH and Raytheon Company partnering with PBS Learning Media to provide Webzines for teachers and students Off Interested In engineering. PBS Learnings, a Tree, online service Tort teachers across the U. S. With more than 35,000 curriculum-based digital resources. This allows educators to offer new programs for limited to no start-up cost. Most schools cannot afford new programs. My school currently does not use webzines and is not adding new programs. By offering, new technology-based programs, our school can improve students interests in science, math, technology, and engineering. Rich, M. (2014, Mar 03). New all-digital curriculums hope to ride high-tech push in schoolrooms. New York Times. Retrieved March 16th,2014 from: http:// search. protest. Com/deceive/1503511198? Accounted=28844 The author Motor Rich of the New York Times wrote this article. It focuses on a new trend in technology all digital curriculum. Many companies, such as Adobe, Prize, McGraw Hill, Scholastic, ad Amplify are providing completely digital curriculum and codebooks for schools. As an elementary educator, it is important to offer innovative textbooks to students. The article focuses on Amplifies digital curriculum which uses social media and washrags to explain concepts to students. A unit on Edgar Allan Poe, students can play a game in which they try to solve the murder of the author, using clues from several poems or stories as well as simulated coroners reports and crime scene files. This allows students to have a more I interactive approach to learning. Most school lack funding for new curriculum and technology-based codebooks. .ub22ec2517b51d5091b3ece6c51aca6b2 , .ub22ec2517b51d5091b3ece6c51aca6b2 .postImageUrl , .ub22ec2517b51d5091b3ece6c51aca6b2 .centered-text-area { min-height: 80px; position: relative; } .ub22ec2517b51d5091b3ece6c51aca6b2 , .ub22ec2517b51d5091b3ece6c51aca6b2:hover , .ub22ec2517b51d5091b3ece6c51aca6b2:visited , .ub22ec2517b51d5091b3ece6c51aca6b2:active { border:0!important; } .ub22ec2517b51d5091b3ece6c51aca6b2 .clearfix:after { content: ""; display: table; clear: both; } .ub22ec2517b51d5091b3ece6c51aca6b2 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .ub22ec2517b51d5091b3ece6c51aca6b2:active , .ub22ec2517b51d5091b3ece6c51aca6b2:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .ub22ec2517b51d5091b3ece6c51aca6b2 .centered-text-area { width: 100%; position: relative ; } .ub22ec2517b51d5091b3ece6c51aca6b2 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .ub22ec2517b51d5091b3ece6c51aca6b2 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .ub22ec2517b51d5091b3ece6c51aca6b2 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .ub22ec2517b51d5091b3ece6c51aca6b2:hover .ctaButton { background-color: #34495E!important; } .ub22ec2517b51d5091b3ece6c51aca6b2 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .ub22ec2517b51d5091b3ece6c51aca6b2 .ub22ec2517b51d5091b3ece6c51aca6b2-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .ub22ec2517b51d5091b3ece6c51aca6b2:after { content: ""; display: block; clear: both; } READ: Industrial Revolution Essay ThesisMy school currently does not use technology-based textbooks and new curriculum. In fact, Technology in classrooms has experienced something of a bumpy roll: When the Los Angles Unified School District introduced its $1 billion effort last year to give every student an pad (loaded with curriculum developed by Pearson, the large textbook and standardized test publisher), students quickly figured out how to hack the devices and wander onto non-educational websites. Our school can improve our curriculum with new technology, and move to the future.

Monday, December 2, 2019

The Strange Case of Dr Jeckyll and Mr Hyde Essay Example For Students

The Strange Case of Dr Jeckyll and Mr Hyde Essay In the novella, The Strange Case of Dr. Jekyll and Mr. Hyde, written by Robert Louis Stevenson, demonstrates that every man or women have both good and evil within. Dr. Jekyll attempts to divide the two in his deranged experiment. Dr. Jekyll believes that if he separates the two, humankind can possibility segregate and over power the evil that exists in us all. Dr. Jekylls intentions are good in seeking to better society, but his techniques are dubious. Dr. Jekyll and Mr. Hydes fight for dualism demonstrates that there is in fact both good and evil in everyone. Dr. Jekyll is the protagonist of the story. In the case of the protagonist Dr. Jekyll is neither the male protagonist nor the scoundrel. He is not a good person nor is he entirely malicious. The antagonist is Dr. Jekyll himself, who through a false experiment undergoes a change that is both a mental and a physical change, through a mixed drug he developed in his laboratory, he becomes Mr. Hyde. Mr. Hydes personality is the complete reverse of the wonderful Dr. Jeckyl. The conflict between the two characters whom came from the same guise is that, Dr. Jekyll is a cultured, well-mannered, normal and self-righteous person. Mr. Hyde, on the other hand is a wicked, ravenous, cruel and abnormal person. Dr. Jekyll symbolizes all the good every man or woman; where as Mr. Hyde symbolizes all that is bad in men or women. Mr. Utterson, a lawyer, went to visit Dr. Jekyll in regard to a will that he left with him. The lawyer was concerned with the fact that Dr. Jekyll was leaving all of his posses sions to his friend and benefactor, Edward Hyde. Mr. Utterson shared his concerns with Dr. Jekyll, and Dr. Jekyll told him, my good Utterson, this is very good of you, this is downright good of you, and I cannot find words to thank you in. I believe you fully; I would trust you before ant man alive ay, before myself, if I could make the choice; but indeed it isnt what you fancy; it is not so bad as that; and just to put your good heart at rest, I will just add one thing: the moment I choose, I can be rid of Mr. Hyde. Mr. Hyde is wicked, ravenous, and abnormal. One black winter morning at about 3:00, Mr. Enfield was going home and he witnessed a small, ugly man trample over an eight to ten year old, and left her screaming on the ground. Mr. Enfield ran after him and tackled him to the ground; as he did so he realized it was Mr. Hyde. We will write a custom essay on The Strange Case of Dr Jeckyll and Mr Hyde specifically for you for only $16.38 $13.9/page Order now It is ironic that Dr. Jekyll, a wise and well-educated gentleman, that he could turn into such a monster, such as Mr. Hyde. Dr. Jekyll is a well-respected and honorable man of his community. As Dr. Jekyll starts his experiment, he finds that he enjoys being the evil Mr. Hyde. Even though he awards himself some comfort in enjoying his experiments, the evil habits of Dr. Jekyll slowly absorbs into good habits of Dr. Jekyll. The more he takes the drug the more often he becomes Mr. Hyde and his personality becomes like Mr. Hyde. In examining the symbols we might find that there is good and evil in every person. The good and evil is hidden in all of us; sometimes it takes another person to find it. In examining the ironies presented here in the paper, we see that Dr. Jekyll was not telling the truth about Mr. Hyde. When he was questioned about Mr. Hyde he would try to ignore the question or he would say something that would direct Mr. Utterson, and the others attention in a different dire ction. Symbolism and irony in this story support that good and evil is the theme. To me it is apparent that the theme of the story is that there is good and bad in every man or women. We all have our good and our bad points. .u32a308d7954d906bdcb4265dd484dd10 , .u32a308d7954d906bdcb4265dd484dd10 .postImageUrl , .u32a308d7954d906bdcb4265dd484dd10 .centered-text-area { min-height: 80px; position: relative; } .u32a308d7954d906bdcb4265dd484dd10 , .u32a308d7954d906bdcb4265dd484dd10:hover , .u32a308d7954d906bdcb4265dd484dd10:visited , .u32a308d7954d906bdcb4265dd484dd10:active { border:0!important; } .u32a308d7954d906bdcb4265dd484dd10 .clearfix:after { content: ""; display: table; clear: both; } .u32a308d7954d906bdcb4265dd484dd10 { display: block; transition: background-color 250ms; webkit-transition: background-color 250ms; width: 100%; opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #95A5A6; } .u32a308d7954d906bdcb4265dd484dd10:active , .u32a308d7954d906bdcb4265dd484dd10:hover { opacity: 1; transition: opacity 250ms; webkit-transition: opacity 250ms; background-color: #2C3E50; } .u32a308d7954d906bdcb4265dd484dd10 .centered-text-area { width: 100%; position: relative ; } .u32a308d7954d906bdcb4265dd484dd10 .ctaText { border-bottom: 0 solid #fff; color: #2980B9; font-size: 16px; font-weight: bold; margin: 0; padding: 0; text-decoration: underline; } .u32a308d7954d906bdcb4265dd484dd10 .postTitle { color: #FFFFFF; font-size: 16px; font-weight: 600; margin: 0; padding: 0; width: 100%; } .u32a308d7954d906bdcb4265dd484dd10 .ctaButton { background-color: #7F8C8D!important; color: #2980B9; border: none; border-radius: 3px; box-shadow: none; font-size: 14px; font-weight: bold; line-height: 26px; moz-border-radius: 3px; text-align: center; text-decoration: none; text-shadow: none; width: 80px; min-height: 80px; background: url(https://artscolumbia.org/wp-content/plugins/intelly-related-posts/assets/images/simple-arrow.png)no-repeat; position: absolute; right: 0; top: 0; } .u32a308d7954d906bdcb4265dd484dd10:hover .ctaButton { background-color: #34495E!important; } .u32a308d7954d906bdcb4265dd484dd10 .centered-text { display: table; height: 80px; padding-left : 18px; top: 0; } .u32a308d7954d906bdcb4265dd484dd10 .u32a308d7954d906bdcb4265dd484dd10-content { display: table-cell; margin: 0; padding: 0; padding-right: 108px; position: relative; vertical-align: middle; width: 100%; } .u32a308d7954d906bdcb4265dd484dd10:after { content: ""; display: block; clear: both; } READ: Position Paper on The Police Exception EssayBibliography:I am 30 years old and a mother of a 3 year old and a 7 month old. I am a stay at