Sunday, November 17, 2019

Cause and Effects of Watching Too Much Television Essay Example for Free

Cause and Effects of Watching Too Much Television Essay Cause and effects of watching too much television Discoveries and invention of devices are always welcome till we, humans, find a way to abuse its benefits and be adversely affected by it. This was the case when Wilhelm Roentgen discovered x-ray and within five years, the British Army was using a mobile x-ray unit to locate bullets and shrapnel in wounded soldiers in the Sudan. Television was also invented with positive thoughts in mind – there would be no national borders, education and communication would be worldwide, etc. However, we are now trying to overcome its physiological and psychological adverse effects on human beings. People mainly watch television for entertainment especially when they are bored or â€Å"have nothing to do†. It is also used for relaxing, as most people like to sit and back and relax while watching their favourite television show. Watching the television however, may become addictive and a hard habit to break. There are many effects of watching too much television. One of the physiological effects of watching television in excessive amounts is eye-strain. It is true that there are specifications for watching television; television should be 5 m. away from the eye, the room should be adequately lit, television should be placed at the same height with our eyes, etc. However, these do not prevent our eyes from getting tired if we keep watching television for a long time. Another effect is obesity, which is widely observed in people who like watching television and eating snacks everyday (there is even a term â€Å"television snacks† to refer to fast food that is suitable for eating in front of the television). Television is such a powerful machine that people cannot get away from it – it is addictive. Apart from the physiological effects, television also causes psychological effects. One is a result of being exposed to violence. After seeing so many violent scenes on television, people start considering violent actions normal and they lose their sensitivity to their environment. Partly connected to this effect, the interpersonal communication among people decreases. Being insensitive to the suffering of other people causes people to become alienated. Also, after coming home from work people seek to relax n front of the television, and generally people prefer watching television to talking to each other. This issue is very important since lack of interpersonal relationships mostly end with divorces. Shortly, inventions are meant to be beneficial for human beings, if we know how to benefit from them. Television is one of such inventions that need to be used for the right purpose only – being educated and entertained for a reasonable (according to age) period of time. We may, then, be safe from or at least reduce the adverse physiological and psychological effects of watching too much television.

Thursday, November 14, 2019

Decline of the Muslim Empires: Safavid, Ottoman, and Mughal Essay

Decline of the Muslim Empires: Safavid, Ottoman, and Mughal Since the beginning, all empires have faced change in many ways, declining and rising in status. Many empires have collapsed, only to start again under a different name. Like all empires, the three Muslim Empires, the Ottomans, Safavids, and Mughals have faced this inevitable state. Although each individual empire is different, they each have similarities in their reasons for decline. Whether it is social, religious, economic, or political reasons, the empires, like many others, have fallen. The Ottoman Empire, founded by Osman, had started in the northwestern corner of the Anatolian Peninsula. The empire expanded rapidly, only to weaken again. The first visible decline was the loss of territory at the Battle of Carlowitz in 1699. Many of their reasons of success have deteriorated over the years and actually caused the decline as well. The Ottoman's military was very strong, especially the members of the Janissaries corps. Boys were recruited from the local Christian population to serve as guards but only the best ones became Janissaries. Soon, though, the position became hereditary, so there was no longer a need to be excellent to occupy a position. Also, the training of officials declined, and the elite formed a privileged group seeking wealth and power. Although the Ottoman system was religiously tolerant, non-Muslims were forced to pay a head tax because of their exemption from military service and were divided by religious faith into a number of "nations" that had i ts own leader and laws. Also, before the decline, the position of the sultan was hereditary and a son always succeeded his father. The heir to the throne gained experience by being assigned a... ...itish control. Although all three of the empires had reached their highest point and were considered to be three great Muslim empires, all of them had started the process of decline. Aurangzeb's actions can illustrate some of the reasons for decline. Without religious tolerance, the empire started having a number of revolts against the imperial authority. By forbidding customs of other religions and everything he considered evil, rebellious groups reasserted local authority, reducing the emperor's power. After causing the weakness of his empire, Delhi was reduced to ashes by the Persians. During and after his rule, everything started to fall apart. This comes to show that one lousy ruler can be the reason for decline in any empire because in order for the empire to be successful, it must have a good ruler, wealth, a strong military, and religious tolerance.

Tuesday, November 12, 2019

Imaginative Journey

Imaginative journey refers to movements where the individual does not have to physically travel anywhere. It is a journey of the mind, which allows individuals to visit any place they desire or are led to; even those that don’t exist. Imaginative journey can lead to inspiration, belief and imagination. However the journey is only a means to an end. This end being: knowledge, experience or discoveries made by the individual in the process of the imaginative journey which broadens or heightens the responder’s perception or sense of the world. Imaginative journeys that take place in the film adaptation of Lewis Carroll’s Alice in Wonderland explore the themes of imagination, magic and freedom. This allows the responder to be able to journey with the main characters and evaluate the perception of their experience and discoveries by applying it to ourselves and others. Alice in Wonderland is an immortal tale of fantasy and wonder that follows the tale of a young girl who falls asleep in a meadow and dreams of entering a magical world, filled with strange adventures and magical creatures. The protagonist of the film Alice uses magic as a form of distraction, resulting from her fear of singing in front of public audiences. Magic is symbolised through the constant music in the film. This is evident when Alice opens the door to the beautiful garden. The director uses a calming instrumental piece of music to show the difference between the reality in Alice’s life and the reality in the magical world behind the small door. The use of a close up shot enforces Alice’s facial expressions to show the audience her excitement and interest in entering the garden. What the audience discovers in Alice’s magical journey is that she’s trying to use magic and her imagination as a platform for self-expression. For example, the rabbit and all the magical characters she meets, from the rude caterpillar to the Cheshire cat, all help her through her imaginative journey. Her fear of speaking in front of people is a reoccurring motif and each character plays a part in helping her overcome this fear. The caterpillar tells her â€Å"everything has a purpose, even here†. Her ‘purpose’ was not only to escape her boring life with magic and imagination, but rather meet that life head on and conquer her fears. Another issue involved is that of freedom. The audience must understand that Alice comes from a social context where children are only meant to be seen, not heard. What the audience gathers from her journey is that her effort to escape and find herself is just a means for her to find her form of freedom. This is shown by the way she has the freedom to either drink or not to drink the potion â€Å"if I drink this, ill be small enough to climb under the door† referring to the beautiful garden that she thinks â€Å"looks safe and no one will look for me there†. The high camera angle of the garden enables the audience to understand why Alice wishes to go there. Though the Cheshire cat reminds her, â€Å"Sometimes things that look safe, turn out to be nasty†. The audience discovers that Alice is able to go through the process of an imaginative journey so she can be free. This helps the audience understand that in their own world it doesn’t matter what age, race or sex you are, the imaginative journey is part of humanity and it is the key towards a better understanding of ourselves and the world around us. Therefore through the themes of imagination, magic and freedom the audience is able to experience Alice’s imaginative journey and gain a better understanding of themselves and others.

Saturday, November 9, 2019

Report on Intelligence and link to Gender

In my study I am traveling to speak about intelligence: specifying the word intelligence, IQ proving and theoreticians work on intelligence, if there is any grounds linked with gender differences in intelligence. I will include possible factors that may impact gender differences in intelligence for case environmental and biological factors. The methods I will utilize to acquire grounds for this study are as follows ; I will utilize books on what theoreticians findings are on this topic, use the cyberspace and diaries. The intent of this survey is to happen out, if there are any possible differences between gender, and associating this to intelligence. Encarta dictionary definition of intelligence ‘is the ability to larn facts and accomplishments and use them ‘ . Deary ‘s ( 2001, p.17 ) definition of intelligence ‘is a really general mental capableness that, among other things, involves the ability to ground, program, work out jobs, think abstractly, comprehend complex thoughts, learn rapidly and larn from experience ‘ . Galton ‘s familial mastermind is to make with the different degrees of intelligence measured by familial factors. Galton thought that higher intelligence was being passed down to kids. Day, Macaskill, & A ; Maltby ( 2007 p.258 ) province that ‘intelligent people show the ability to react to the big scope of information gained through their senses ‘ . So the 5 senses of the human organic structure are critical such as odor, gustatory sensation, hearing, sight and touch because this will find how intelligent a individual may be, if they do non utilize their senses right, the individual will hold less intelligence than those who can for case, a individual does non cognize the difference between Sweet and salty. A babe ‘s gustatory sensation and odor buds are really good because, the babe will cognize when it is clip for dinner by utilizing their odor sense. Babies use gustatory sensation buds go od because when my brother was younger he would prefer to eat the sweet nutrient instead than the salt nutrient, it would take him longer to eat the salty nutrient, on the other manus when eating the sweet nutrient it wo n't take every bit long as the salt nutrient. Cattell ‘s mental trial is to make with mensurating a individual ‘s intelligence through hearing and weight these experiments were carried out utilizing the psychometric theoretical account. Problems with this experiment Chamorro – premuzic ( 2007, p. 67 ) examined this and suggested that ‘ therefore, most of the variables he measured were more â€Å" elemental † than â€Å" mental † , and referred to really basic cognitive procedures that are now known to be related to intelligence ‘ . From this remark you can see that the experiment he did was more on the indispensable side of things such as how good child can hear and non based on mental accomplishments such as numeracy, jo bs work outing or literacy. The IQ trial was developed by two Gallic scientists, Alfred Binet and Theodore Simon, the intent of the trial was to measure kids at school so that stupid kids or kids with behavioral troubles could have equal and appropriate instruction. IQ proving is to make with mensurating your intelligence for illustration comprehension, job resolution and concluding accomplishments. Criticisms of IQ proving are as follows they do non accurately step intelligence, and everyone has different strengths and failings in different countries of intelligence, such as person could be good at job resolution, but have a failing in concluding accomplishments and another individual could be good at concluding accomplishments and non really good on job resolution. Howard Gardner ( multiple intelligence theory ) he put together eight different intelligence trials which were Linguistic, Logical-mathematical, Spatial, Bodily-kinesthetic, Musical, Interpersonal, Intrapersonal and Nat uralist. Criticism of the Theory like many theories environing intelligence, Gardner ‘s theory of multiple intelligences is controversial and widely criticised. In peculiar, there is uncertainty over his deficiency observed informations – many feel that the 8 ‘intelligences ‘ are merely alternate names for specific endowments or even personality types. Methodology I have used books, the cyberspace and diaries to roll up my informations. This method of researching is called secondary research. Secondary research is the usage of stuff, which has been researched by person else. The different research methods for secondary research are as follows: engineering based and instance surveies. Technology based research is to make with researching from the computing machine to acquire your information, which has a batch of benefits such as the cyberspace provides on-line libraries ; e-books, diaries and encyclopedia. The chief electronic databases I have used for my research were as follows Psycinfo, Psychology & A ; Behavioural Sciences Collection and British ED index. The cardinal read was based on, intelligence and gender differences and how the hunt found a figure of diaries, but some were irrelevant, to what I was looking for. You can download information off the Internet but make certain it is copyright free. Search engines aid you through the mass of information on the Internet two most popular hunt engines are yahoo and google etc ; besides on the cyberspace you can seek for newspaper articles. Case surveies published by other research workers can be used as secondary footing of informations. There is a batch of ways you can utilize them such as identify differences and discuss comparings. I did non utilize primary research because this is to make with transporting out your ain research. The different research methods for primary research are interviews, experiments, questionnaires and observations etc. I did n't utilize this method because I did n't hold adequate clip to make this if I did I would hold done questionnaires to acquire my findings. Literature reappraisal There has been a batch of work done on intelligence and how this is linked to gender differences. Alan Feingold ( 1988 ) examined sex differences for spelling, verbal logical thinking, numerical ability, spacial relationship and linguistic communication and many more. Another individual who studied this was Larry Hedges and Amy Nowell ( 1995 ) , who looked at reading comprehension, vocabulary, mathematics, scientific discipline and spacial ability ( which is to make with the ability to retrieve things by looking at objects and retrieving them ) . Maccoby and Jacklin ( 1974 ) suggested that work forces on norm do better on trials of spacial ability than adult females do. Supporting this ( Feingold, 1988 ; Hedges & A ; Nowell, 1995 ) who have done surveies on spacial trials have proven this hypothesis. In contrast ( Feingold, 1988 ; Hedges & A ; Nowell, 1995 ) have similarities in their experiments for illustration they both tested numeracy accomplishments and literacy accomplishments. On the other manus adult females do better on reading comprehension and vocabulary than work forces do. APA study province that ‘some verbal undertakings show significant average differences favoring females. These include synonym coevals and verbal eloquence ( e.g. calling words that start with a given missive ) , with consequence size runing from d= 0.5 to 1.2 ( Gordon & A ; Lee, 1986 ; Hines 1990 ) ‘ . Males have larger encephalons than females and encephalon size is positively correlated with intelligence. Among kids up to the age of around 14 yr the sex differences are smaller because misss mature earlier than male childs. Work done by Lubinski and Humphreys ( 1990 ) found that the criterion of divergence for males to be 7 per centum larger than for females. It has besides been hypothesised that work forces ‘s higher IQ mark may be direct effect of their larger encephalon sizes, a claim that has been backed up by consistent grounds of correlativities in the p art of.30 between encephalon size and IQ tonss ( Rushton & A ; Ackney 1996 ) . Macintosh ( 2007, p. 184 ) provinces that ‘ the critics would hold been better advised to oppugn whether one can do reasonable illations about differences in IQ between groups from grounds of their differences in the encephalon plus grounds of a within-group correlativity between encephalon size and IQ ‘ . Environmental factor impacting intelligence environmental factors play a big function in finding IQ in certain state of affairss. Malnutrition correlates with lower IQ, proposing that proper nutrition in childhood is critical for cognitive development. ( Cole, 2000:26 ) Even before kids go to school their parents will handle a male child and girl really different. Even in society throughout history this has occurred. A batch of research has gone into this ; your gender is an issue from the minute you are born. Automatically society will state how a miss will act and how a male child will act . If it is a male child, oh he ‘s like that because he ‘s a male child and boys ever take longer to hold on it. The thought that intelligence and personality are mostly inherited has of import educational deductions. Environmental factors, e.g. household experiences, upbringing and schooling play a major function. ( Chamorro-Premuzic, 2008:99 ) . Biological factor impacting intelligence are as follows encephalon size, encephalon operation and testosterone. Testosterone is to make with males endocrines these are substances that travel around the human organic structure to consequence physiological activity, such as growing and metamorphosis Maltby et Al ( 2007, p.360 ) . Consequences or findings The figure below is from Hines ( 2003 ) and shows the magnitudes of some well-known sex differences in human behavior compared to the magnitude of the sex difference in tallness. hypertext transfer protocol: //sexes.martinsewell.com/Hines2003-1-1.png This graph shows that work forces do good in 3-D rotary motion 0.8 divergence units, maths job 0.3 divergence units, maths concept 0.1 divergence units which non much because the consequence size is little. On the other manus this graph shows that verbal eloquence is low in male childs than misss because vitamin D is a negative figure, which shows -0.3 on the graph. This tabular array shows the spread in 1989 was merely 6 % but 10yrs later it had increased to 10 % . It is suggested by S. Ball ( 2008 ) that this spread is an overall statistic and non capable particular he suggests that in 2004 the divergences of this spread was merely 1 % and that in some topics boys achieve better consequences than misss therefore it is non valid to state that all male childs or all misss achieve less in Gcse degrees Discussion The of import issues that I have found are that male childs have bigger encephalon sizes than misss, which is linked to better IQ trial tonss for male childs than misss. Another issue that I found is that male childs tend to make better on spacial accomplishments ; they find mathematics and scientific discipline more interesting to larn about. But on the other manus misss to break on verbal, comprehension and vocabulary accomplishments than male childs do. The importance of this survey was to happen out ; if there were any differences between genders in intelligence besides I was interested in happening this out so I undertook my research study on this topic. During the procedure of garnering the information, it was really interesting to happen out that work forces have bigger encephalons than adult females, which gives them better IQ mark than adult females. Decisions and recommendations The intent of this survey is to happen out, if there are any possible differences between gender, and associating this to intelligence. From making my research in this field, I have found that there is non much difference between male and females and theoreticians have backed this statement up for many old ages. Neisser 1996 province that ‘most standard trials of intelligence have been constructed so that there are no overall mark differences between females and males ‘ . The chief issues that affect intelligence in gender: Boys do better on spacial trials than misss ; in contrast to this misss do better in verbal, comprehension and vocabulary accomplishments. Brain size of males is bigger than females encephalon size which consequences in work forces acquiring better IQ tonss than adult females. If I carry out this survey once more, I would do betterments to the research I have done, by making my ain research in this field to see what consequences I get from making this, I can make this by transporting out questionnaires on IQ. Another manner I could better my research is inquiring people to take the IQ trial. With these consequences I can compare them to one another, to happen out if there are any possible differences.

Thursday, November 7, 2019

Free Essays on Describe And Evaluate One Study Into Conformity

Kim. Moreland Describe and evaluate one study into conformity. [18] 6 marks AO1- Describing the aims procedures, findings and conclusions 12 marks A02- Evaluation and commentary Zimbardo decided to conduct an experiment containing 21 male students, in which he enrolled them into two categories, he did this randomly in order to ensure that there was no bias involved, some would be given the roll of a prisoner and the others would be the guards guarding the prisoners. Zimbardo hoped to discover that the subjects would conform into the roles of the stereotype prisoner and guard, so that he could discover if the hostility found in real prisons was due to a personality trait more often found in the prison guards. Before Zimbardo could conduct the experiment he chose his subjects carefully and put them through tests to ensure that their mental condition was stable and that they were all ‘normal’. This was done to ensure that the experiment was fair and that the subjects had a less likely chance of suffering from any psychological factors after ending the experiment. He would place them in the bottom floor of an university which had been transformed into a prison environment to ensure that the conditions were as real as possible for the volunteers. to continue this idea of reality Zimbardo sent police cars to the homes of those assigned as prisoners and ‘arrested’ them there, this took place without any formal consent by the volunteers, but Zimbardo saw no harm in doing this. This could be seen as an unethical action on Zimbardo’s behalf. They were then transported to the ‘prison’ and stripped, searched, deloused and given their prison uniform. The guards were also given an uniform and a set of 16 rules they should follow. This sense of reality added more credibility to the experiment and therefore could also motivate them into their roles. The experiment gave light to many unethical happenings and the exten... Free Essays on Describe And Evaluate One Study Into Conformity Free Essays on Describe And Evaluate One Study Into Conformity Kim. Moreland Describe and evaluate one study into conformity. [18] 6 marks AO1- Describing the aims procedures, findings and conclusions 12 marks A02- Evaluation and commentary Zimbardo decided to conduct an experiment containing 21 male students, in which he enrolled them into two categories, he did this randomly in order to ensure that there was no bias involved, some would be given the roll of a prisoner and the others would be the guards guarding the prisoners. Zimbardo hoped to discover that the subjects would conform into the roles of the stereotype prisoner and guard, so that he could discover if the hostility found in real prisons was due to a personality trait more often found in the prison guards. Before Zimbardo could conduct the experiment he chose his subjects carefully and put them through tests to ensure that their mental condition was stable and that they were all ‘normal’. This was done to ensure that the experiment was fair and that the subjects had a less likely chance of suffering from any psychological factors after ending the experiment. He would place them in the bottom floor of an university which had been transformed into a prison environment to ensure that the conditions were as real as possible for the volunteers. to continue this idea of reality Zimbardo sent police cars to the homes of those assigned as prisoners and ‘arrested’ them there, this took place without any formal consent by the volunteers, but Zimbardo saw no harm in doing this. This could be seen as an unethical action on Zimbardo’s behalf. They were then transported to the ‘prison’ and stripped, searched, deloused and given their prison uniform. The guards were also given an uniform and a set of 16 rules they should follow. This sense of reality added more credibility to the experiment and therefore could also motivate them into their roles. The experiment gave light to many unethical happenings and the exten...

Tuesday, November 5, 2019

Basic Model of the Atom - Atomic Theory

Basic Model of the Atom - Atomic Theory All matter consists of particles called atoms. Atoms bond to each other to form elements, which contain only one kind of atom. Atoms of different elements form compounds, molecules, and objects. Key Takeaways: Model of the Atom An atom is a building block of matter that cannot be broken apart using any chemical means. Nuclear reactions can alter atoms.The three parts of the atom are protons (positively charged), neutrons (neutral charge), and electrons (negatively charged).Protons and neutrons form the atomic nucleus. Electrons are attracted to the protons in the nucleus, but are moving so quickly they fall toward it (orbit) rather than stick to protons.The identity of an atom is determined by its number of protons. This is also called its atomic number. Parts of an Atom Atoms consist of three parts: Protons: Protons are the basis of atoms. While an atom can gain or lose neutrons and electrons, its identity is tied to the number of protons. The symbol for proton number is the capital letter Z.Neutrons: The number of neutrons in an atom is indicated by the letter N. The atomic mass of an atom is the sum of its protons and neutrons or Z N. The strong nuclear force binds protons and neutrons together to form the nucleus of an atom.Electrons: Electrons are much smaller than protons or neutrons and orbit around them. What You Need to Know About Atoms This is a list of the basic characteristics of atoms: Atoms cannot be divided using chemicals. They do consist of parts, which include protons, neutrons, and electrons, but an atom is a basic chemical building block of matter. Nuclear reactions, such as radioactive decay and fission, can break apart atoms.Each electron has a negative electrical charge.Each proton has a positive electrical charge. The charge of a proton and an electron are equal in magnitude, yet opposite in sign. Electrons and protons are electrically attracted to each other.  Like charges (protons and protons, electrons and electrons) repel each other.Each neutron is electrically neutral. In other words, neutrons do not have a charge and are not electrically attracted to either electrons or protons.Protons and neutrons are about the same size as each other and are much larger than electrons. The mass of a proton is essentially the same as that of a neutron. The mass of a proton is 1840 times greater than the mass of an electron.The nucleus of an atom contains protons and neutrons. The nucleus carries a positive electrical charge. Electrons move around outside the nucleus. Electrons are organized into shells, which is a region where an electron is most likely found. Simple models show electrons orbiting the nuclear in a near-circular orbit, like planets orbiting a star, but real behavior is much more complex. Some electron shells resemble spheres, but others look more like dumb bells or other shapes. Technically, an electron can be found anywhere within the atom, but spends most of its time in the region described by an orbital. Electrons can also move between orbitals.Atoms are very small. The average size of an atom is about 100 picometers or one ten-billionth of a meter.Almost all of the mass of an atom is in its nucleus; almost all of the volume of an atom is occupied by electrons.The number of protons (also known as its atomic number) determines the element. Varying the number of neutrons results in isotopes. Varying the number of electrons results in ions. Isotopes and ions of an atom with a constant num ber of protons are all variations of a single element. The particles within an atom are bound together by powerful forces. In general, electrons are easier to add or remove from an atom than a proton or neutron. Chemical reactions largely involve atoms or groups of atoms and the interactions between their electrons. Does the atomic theory make sense to you? If so, heres a quiz you can take to test your understanding of the concepts. Sources Dalton, John (1803). On the Absorption of Gases by Water and Other Liquids, in Memoirs of the Literary and Philosophical Society of Manchester.Thomson, J. J. (August 1901). On bodies smaller than atoms. The Popular Science Monthly. pp. 323–335.Pullman, Bernard (1998). The Atom in the History of Human Thought. Oxford, England: Oxford University Press. pp. 31–33. ISBN 978-0-19-515040-7.

Sunday, November 3, 2019

How Will Advances in Big Data, IT, Cloud Computing and Analytics Essay

How Will Advances in Big Data, IT, Cloud Computing and Analytics Impact Healthcare - Essay Example Cloud computing is the use of computer software and hardware over a network normally as a service. This means that in order for someone to use the software and hardware they do not need to have them physically, all they need is access to the network where the respective cloud network is located (Agha, 2012). A good example of cloud computing is where hospitals compile all their information centrally and staff with verified passwords can access the information irrespective of the geographical location. Analytics can be considered the communication and discovery of patterns in data sets. Analytics are normally used in areas where that have a lot of recorded information. Analytic greatly depends and relies on computer programming operations and statics. Analytics can be used in the healthcare system where patient information may be used to predict future trends in diseases and general health of the population. Healthcare has been curbed by a lot of problems. It is filled with a lot of setbacks and short comings. One of major inefficiencies of the healthcare system is the old filling system. This is where all records including patient records and disease records are stored in the manual hardcopy files. There are no softcopy backups thus making the hard copy files the only files on record. This has proved cumbersome since there are hospital records that date back to almost the 1900s. Finding such a record using the manual filing system is very difficult. As it is known, almost all disease and outbreaks repeat themselves in time. This means that doctors might be unable to identify some old diseases just because a record of the disease in the past cannot be located. Another major inefficiency in healthcare is administration. Administration in the healthcare system is very poor yet a lot of money is used in the administration of all health care system. This is double inefficiency. Administrating healthcare especially in underdeveloped countries is done in a