Wednesday, December 20, 2006

Sniffle-Busting Personalities: Positive mood guards against getting colds

Bruce Bower

People with generally positive outlooks show greater resistance to developing colds than do individuals who rarely revel in upbeat feelings, a new investigation finds.

Frequently basking in positive emotions defends against colds regardless of how often one experiences negative emotions, say psychologist Sheldon Cohen of Carnegie Mellon University in Pittsburgh and his colleagues. They suspect that positive emotions stimulate symptom-fighting substances.

"We need to take more seriously the possibility that a positive emotional style is a major player in disease risk," Cohen says.

In a study published in 2003, his group exposed 334 healthy adults to one of two rhinoviruses via nasal drops. Those who displayed generally positive outlooks, including feelings of liveliness, cheerfulness, and being at ease, were least likely to develop cold symptoms. Unlike the negatively inclined participants, they reported fewer cold symptoms than were detected in medical exams.

The new study, which appears in the November/December Psychosomatic Medicine, replicates those results and rules out the possibility that psychological traits related to a positive emotional style, rather than the emotions themselves, guard against cold symptoms. Those traits include high self-esteem, extroversion, optimism, and a feeling of mastery over one's life.

The latest data also show that among people with a consistently positive mood, well-being doesn't simply reflect physical vigor. All volunteers entered the study in comparably good health.

In that project, Cohen's team interviewed 193 healthy adults by phone each evening for 2 weeks. The participants reported their positive and negative emotions during that day. They then received nasal drops containing a rhinovirus or an influenza virus that causes a coldlike illness.

Each person was quarantined in a separate room and monitored for 5 or 6 days. Although a positive emotional style bore no relation to whether participants became infected, it protected against the emergence of cold symptoms. For instance, among people infected by the influenza virus, 14 of 50 (28 percent) who often reported positive emotions developed coughs, congestion, and other cold symptoms, as compared with 23 of 56 infected individuals (41 percent) who rarely reported positive emotions.

The extent of positive emotions, but not of negative ones, exerted a strong impact on the emergence of cold symptoms, Cohen says. His recent analysis of immune measures from volunteers in the 2003 study, published last March in Brain, Behavior, and Immunity, points to enhanced regulation of an infection-fighting substance, interleukin-6, in people with positive emotional styles.

Cohen's current study offers "an interesting twist" on the relationship between feelings and health, remarks psychologist Janice K. Kiecolt-Glaser of Ohio State University in Columbus. Other research indicates that negative emotions influence immune function and illness development more powerfully than positive emotions do, Kiecolt-Glaser says.

However, psychologist Barbara L. Fredrickson of the University of North Carolina at Chapel Hill notes that the new data agree with her work showing that to a surprising degree, positive emotions can bolster the immune system to improve health.

Studies of the impact of mood on physical health need to account for both positive and negative emotions, Cohen holds. He points to preliminary data from other teams suggesting that among depressed people, a lack of positive emotions is a more accurate predictor of stroke than is the extent of their negative emotions.

Just can't get e-nough

From issue 2583 of New Scientist magazine, 20 December 2006, page 34-37

 

Hello, my name is Richard and I am an egosurfer. The habit began about five years ago, and now I need help. Like most journalists, I can't deny that one of my private joys is seeing my byline in print. Now the internet is allowing me to feed this vanity to an ever greater extent, and the occasional sneaky web search has grown into a full-blown obsession with how high up Google's ranking my articles appear when I put my name into the search box. When I last looked, my best effort was a rather humiliating 47th place. You know you have a problem when you find yourself competing for ranking with a retired basketball player from the 1970s.

Not that I'm alone in suffering from a dysfunctional techno-habit. New technologies have revealed a whole raft of hitherto unsuspected personality problems: think crackberry, powerpointlessness or cheesepodding (see "Modern maladies", bottom). Most of us are familiar with sending an email to a colleague sitting a couple of feet away instead of talking to them. Some go onto the web to snoop on old friends, colleagues or even first dates. More of us than ever reveal highly personal information on blogs or MySpace entries. A few will even use internet anonymity to fool others into believing they are someone else altogether. So are these web syndromes and technological tics new versions of old afflictions, or are we developing fresh mind bugs?

Developing a bad habit is easier than many might think. "You can become addicted to potentially anything you do," says Mark Griffiths, an addiction researcher at Nottingham Trent University in the UK, "because addictions rely on constant rewards." Indeed, although definitions of addiction vary, there is a body of evidence that suggests drug addictions and non-drug habits share the same neural pathways (New Scientist, 26 August, p 30). While only a hardcore few can be considered true technology addicts, an entirely unscientific survey of the web, and of New Scientist staff, has revealed how prevalent techno-addictions may have become.

The web in particular has opened up a host of opportunities for overindulgence. Take Wikipedia. Updating the entries - something anyone can do - has become almost a way of life for some. There are more than 2400 "Wikipedians", p 36 - you know where to look it up if you don't know what it means - who have edited more than 4000 pages each ("see Confessions of a Wikipediholic", below). "It's clearly like crack for some people," says Dan Cosley at Cornell University in New York, who has studied how websites such as Wikipedia foster a community. To committed Wikipedians, he says, the site is more than a useful information resource; it's the embodiment of an ideology of free information for all.

Then there are photolog sites like Flickr. While most of us would rather die than be caught surreptitiously browsing through someone else's photos, there need be no such qualms about the private pics people put up on these sites. Haliyana Khalid and Alan Dix at Lancaster University in the UK have studied this new practice of "photolurking". Most people they interviewed who used Flickr and similar sites spent time each day browsing albums owned by people they had never met. They do this for emotional kicks, Khalid and Dix suggest: flicking through someone else's wedding photos, for example, allows people to daydream about their own nuptials.

"Photolurkers spent most of their time online flicking through photograph albums posted by strangers"

Email is another area where things can get out of hand. While email has led to a revival of the habit of penning short notes to friends and acquaintances, the ease with which we can do this means that we don't always think hard enough about where our casual comments could end up. This was the undoing of US broadcaster Keith Olbermann, who earlier this year sent a private email in which he described a fellow MSNBC reporter as "dumber than a suitcase of rocks". Unfortunately for Olbermann, the words found their way into the New York Daily News.

Pam Briggs, a specialist in human-computer interaction at the University of Northumbria, UK, says the lack of cues such as facial expressions or body language when communicating electronically can lead us to overcompensate in what we say. "The medium is so thin, there's little room for projecting ourselves into it," says Briggs. "When all the social cues disappear, we feel we have to put something else into the void, which is often an overemotional or over-intimate message."

The habit of forwarding jokey emails or YouTube videos - think Diet Coke and Mentos fountains - can also say a lot about how people want to be perceived, Briggs adds. "We rarely want to be seen as too serious, so we try to project more of our personality into email." This could also explain why many bloggers expose private information that they would never shout out to a crowded room - another modern trend. Just ask Jessica Cutler, the US Senate aide who in 2004 posted graphic descriptions on her blog Washingtonienne, recounting tales of sexual mischief on Capitol Hill. Or perhaps blogger Catherine Sanderson - also known as La Petite Anglaise - who was sacked this year for her accounts of the everyday life and loves of a secretary at the Paris-based firm where she was employed. It seemed her bosses were less than thrilled that thousands were logging on to www.petiteanglaise.com to read her Bridget Jones-like tales of stuffy colleagues and exposed cleavage during business meetings.

Such indiscretions are not the only way virtual habits feed back into the real world. According to Jeff Hancock, who specialises in computer-mediated communication at Cornell University, Ithaca, New York, the way we act and emote online has implications for our offline selves. In a study to be published shortly, he and colleagues asked subjects to pretend to be extroverted either on a live blog or in a Microsoft Word document they knew would not be made public, and then ran the participants through a personality test. Hancock says the group that blogged emerged as more extroverted than the Word group. He says that acting out a particular personality online reinforces the behaviour, making it more likely to be followed in real life. This could start a cycle as our public and virtual selves feed into each other and we become gradually more indulgent, more indiscreet - or perhaps more egocentric. I do hope this article improves my Google ranking.

 

Confessions of a Wikipediholic

People call me a Wikipediholic, but that's not the way I see myself. I'm in the top ten Wikipedians by the number of edits I have made, and I do mention it to people from time to time - though generally just as an indicator that I'm an experienced editor rather than bragging. Friends and relatives are both mildly impressed and mildly amused.

I'd say I spend about a quarter of my spare time on the site, about two hours a day on average. I've set my browser so that every time I open it I'm presented with a random article. Often it'll need some little tweak to formatting or style. It's a cycle: I'll be searching Wikipedia for information about some subject and then when I get to the article I want, I'll find it needs some major work or is otherwise inadequate. I can get sidetracked for hours on this sort of thing.

Three major factors come to mind about why I spend so much time on it: the instant gratification of being able to fix something that's broken or unpolished, the ability to explain to the rest of the world things that I know, and also how I learn new and sometimes unexpected bits of information along the way.

My idea of what it takes to be a Wikipediholic? Obsessive tidiness, at least where it comes to organising information, is a good sta
rt.

Bryan Derksen is a scientific equipment salesman who lives in Edmonton, Canada. He has made more than 70,000 edits to Wikipedia entries

Confessions of a MySpacer

I don't mind that many people seem to think they are friends with the real David Attenborough. Hardly anybody has asked me if I am really him.

I set up David's MySpace page because I've been a fan since I was a kid, watching his ground-breaking series like Life on Earth and The Living Planet. David has been an inspiration.

Generally, I spend a few hours a week on MySpace to answer questions, and update my page with news and more content, such as video clips and news of his latest programmes. I certainly never express my thoughts or message people claiming that I'm David.

I think most people understand the nature of MySpace: it's for fun, so it doesn't matter if it's "real" or not. People don't ask David if they can have his phone number; everybody just light-heartedly wants to give him praise. It's his virtual avatar - a sort of a shrine where people come and share their thoughts and admire his incredible body of work. People address Charles Darwin on his MySpace page as if he were alive and well.

Have I intentionally made it look as if David could have posted it himself? Yes and no. There is a certain role-playing aspect to it. On MySpace as in other online social interaction we depict our personalities in the way we want others to see us.

Peter Vaht is a computer artist who lives in Westchester, New York. He (and David) can be found at www.myspace.com/dattenborough

Confessions of a cyberchondriac

It starts with a heart palpitation. My doctor tells me it's just my 12-a-day espresso habit. But ask the internet and you get a different picture. Just put in the terms and follow the leads: cardiac arrhythmias, hypertension, angina, I've had the lot. It's addictive.

Of course, there is one obstacle for the committed cyberchondriac. Most responsible health websites advise you to "visit your doctor". This leads to an endless game of diagnostic tennis as I bounce back and forth from net doctor to real doctor, one insisting that I need urgent medical treatment, the other telling me I am fine.

The result is inevitable: giving up on the human doctor for remedial advice and instead digging deeper into the internet to find my own cure. And here is where the real dangers begin: internet links take the place of intellectual links; following them leads to a numbing of rational thought, but also to curious websites advocating obscure and spurious holistic remedies. Soon I forget that it's 4 am and I am entangled in the darkest depths of obsessive self-help.

Fortunately, my cyberchondriac worries burn out in the end. It's usually at the point where I own up to falsifying my answers on internet questionnaires to get the condition I want. And I admit I do feel a lot better now I am on the decaf.

Paul Sloman is a freelance designer and editor living in London. He is currently Googling for "Ebola virus"

Confessions of a cheesepodder

It started with Africa by Toto, a song so cheesy that you could cover it in plastic wrap and sell it at the deli counter - yet also one of the outstanding soft-rock moments of the early 1980s, if not all time. It was late and I was drunk, mucking around with my iTunes library, when for some reason it hit me. I needed to hear that song, right now. Just 79 pence later it was mine.

We've all got them - cringeworthy songs that we would never admit to liking, at least not while sober. In the past, owning such shameful material entailed possessing a CD, tape or vinyl album that might be discovered and ridiculed by your friends. Not any more. Not in the age of the MP3 player.

After that the cheese flowed thick and fast. More Than a Feeling by Boston. Down Under by Men at Work. And a few I'm not telling you about.

I call my habit cheesepodding, and since I discovered it I have found I am not alone. In certain circles there is even an ironic cool to be had from out-cheesing your friends. There is a problem, though. As with all addictions, you end up needing bigger and bigger hits to get the same buzz. Once I started downloading Celine Dion power ballads, I knew it was time to stop.

Fortunately, I have found a variant that is, if anything, more entertaining. I download songs I know my wife hates and put them onto her iPod while she isn't looking.

Graham Lawton is the New Scientist features editor

Confessions of a Google-stalker

Much of my recreational Googling is simply to snoop on friends and acquaintances. I enjoy Googling people I've lost touch with to find out what they are up to without having to risk actually contacting them. Often the impulse is fed by professional competitiveness, sometimes by pure inquisitiveness. I Google-stalk people who may have fared worse than I have in the years since I last saw them: fellow interns who didn't "make it", university chums who dropped out, even friends who suffered illnesses and accidents.

Other times I like to Google people I'm not really supposed to know much about - an uncle's mysterious son from a previous marriage, for instance, or a friend's supposedly secret lover. I've never met these people and probably never will, but I do delight in figuring out who they are and where they live, and glimpsing their sporting achievement (fourth place in a wrestling tournament) or success in the job market (still untenured).

Once, I incited my mother to Google an old friend of hers who'd deserted his wife back in 1963, while she was in hospital giving birth. As she tells it, he "disappeared into thin air". These days the air is not so thin. We found out where he was living, and even a telephone number where we could ring him. We didn't, of course. That would be crossing the line.

Alison Motluk is New Scientist's Toronto correspondent

Modern maladies

Blog streaking Revealing secrets or personal information online, which for everybody's sake would be best kept private

Crackberry The curse of the modern executive, not being able to stop checking your BlackBerry even at you grandmother's funeral

Cyberchondria A headache and a particular rash at the same time? Extensive online research tells you it must be cancer

Egosurfing When "just checking" gets out of control

Infornography You're beyond being a healthy "infovore": acquiring and sharing information has become an addiction for you

You Tube narcissism Not even your closest family want to see hours of your holiday videos

Google-stalking Snooping online on old friends, colleagues or first dates

MySpace impersonation Many of us pretend to be someone we're not when we are online, but some will pretend to be a well-known figure

Powerpointlessness One too many flashy slides

Photolurking Flicking through a photo album of someone you've never met

Wikipediholism Excessive devotion to a certain online collaborative encyclopedia. You can test whether you're an addict at http://en.wikipedia.org/wiki/Wikipedia:Are_You_a_Wikipediholic_Test

Friday, December 15, 2006

西方美术史

这里的西方美术史主要是西方造型艺术史(包括绘画雕刻建筑等)








史前美术



法国的拉斯科洞窟壁画

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法国的拉斯科洞窟壁画



又称“原始美术”,西方人最早的美术作品产生于旧石器时代晚期,即距今3万到1万多年之间。最杰出的原始绘画作品,发现于法国南部和西班牙北部地区的几十处洞窟中,其中最著名的是法国的拉斯科洞窟壁画和西班牙的阿尔塔米拉洞窟壁画。所绘形象皆为动物手法写实,形象生动。迄今为止发现的原始雕刻大多为小型动物雕刻,少数人像雕刻中,裸体女性雕像佔主要地位,这些女性雕像夸张女性的生理特点,突出表现女性的乳房、臀部、腹部、大腿等,体现出原始人对于母性生殖的崇拜意识。在奥地利维也纳附近的维伦多夫出土的女性雕像被称为“维伦多夫的维纳斯”,是其中最著名的代表作。



古代美术



金字塔

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金字塔



西方习惯把新石器末期到中世纪称为古代,具体来说就是指公元前4000年(文字的出现)到公元476年(西罗马帝国灭亡)。 主要包括美索不达米亚、埃及、希腊和罗马时期的美术。


美索不达米亚(即幼发拉底河底格里斯河之间的地区,又称两河流域)的雕塑,如巴比伦王国的“汉漠拉比法典浮雕亚述王国那些表现战争狩猎的紧张场面、手法极为写实、充满激烈动势的浮雕。


古埃及的庞大金字塔建筑,按照正面律程式雕刻的人像雕刻和神秘威严的狮身人面像


古希腊的自由民主创造了具有民主思想的建筑、雕刻和绘画作品,其中留存于世的不少健美而优雅的雕刻形象,如《掷铁饼者》、《米洛斯的维纳斯》等,尤其具有无穷的魅力。


古罗马美术承继着古希腊的传统,但罗马人的美术更倾向于实用主义。规模巨大的科洛西姆竞技场万神庙是古罗马建筑的杰出代表。而曾被维苏威火山灰掩埋达1700多年的庞贝壁画,则给我们展示了古罗马绘画的独特面貌。



中世纪美术



哥特式教堂

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哥特式教堂



中世纪是指公元5世纪(以公元476西罗马帝国崩溃作为标志)到15世纪(意大利文艺复兴的黎明),它标志着西方进入了基督教时代。受基督教制约,中世纪美术不注重客观世界的真实描写,而强调所谓精神世界的表现。建筑的高度发展是中世纪美术最伟大的成就。拜占廷教堂罗马式教堂哥特式教堂,各具艺术上的创造性。与宗教建筑相结合,雕刻、镶嵌画壁画也取得了一定成就。



文艺复兴美术



达 · 芬奇的作品《蒙娜麗莎》

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达 · 芬奇的作品《蒙娜麗莎



14-16世纪的欧洲文艺复兴美术以坚持现实主义方法和体现人文主义思想为宗旨,在追溯古希腊古罗马艺术精神的旗帜下,创造了最符合现实人性的崭新艺术。


意大利达·芬奇米开朗基罗拉斐尔是文艺复兴美术的三位代表。达·芬奇既是艺术家又是科学家,其杰作《最后的晚餐》、《蒙娜丽莎》等皆被誉为世界名画之首。米开朗基罗则在雕刻、绘画和建筑各方面都留下了最能代表鼎盛期文艺复兴艺术水平的典范之作。他塑造的人物形象,雄伟健壮,气魄浑宏。拉斐尔则以其塑造的秀美典雅的圣母形象最为成功。他的圣母像寓崇高于平凡,被誉为美和善的化身,最充分地体现了人文主义的理想。



17世纪美术



委拉斯贵支的作品《宫娥》

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委拉斯贵支的作品《宫娥》



17世纪在欧洲出现了巴洛克美术,它发源于意大利,后风靡全欧。其特点是追求激情和运动感的表现,强调华丽绚烂的装饰性。这一风格体现在绘画、雕塑和建筑等各个美术门类中。佛兰德斯鲁本斯是巴洛克绘画的代表人物,他的热情奔放、绚丽多彩的绘画对西方绘画具有持久的影响。同时代的现实主义大师如荷兰伦勃朗、西班牙的委拉斯贵支等,也在一定程度上具有巴洛克的特色。



18世纪美术



布歇的作品《雷那多和亚美达》

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布歇的作品《雷那多和亚美达》



18世纪罗可可风格在法国兴起,随后波及欧洲其他国家。罗可可美术的特点是追求华丽纤巧和精致。代表画家有法国的华托布歇弗拉戈纳尔。随着1789年法国资产阶级大革命的到来,进步的美术家们又一次重振了古希腊古罗马的英雄主义精神,开展了一场新古典主义艺术运动。其代表画家是法国的大卫安格尔浪漫主义随着新古典主义的衰落而兴起。法国的热里科的《梅杜萨之筏》被视为浪漫主义绘画的开山之作,而这一运动的主将却是德拉克洛瓦,其绘画色彩强烈,用笔奔放,充满强烈激情,代表作有《希阿岛的屠杀》和《自由领导着人们》等。法国吕德的《马赛曲》和卡尔波的《舞蹈》都是杰出的浪漫主义雕塑作品。



[编辑] 19世纪美术



库尔贝的作品《画室》

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库尔贝的作品《画室》



19世纪中期是现实主义美术蓬勃兴旺的时期。法国画家库尔贝是现实主义的倡导者,他的代表作《奥南的葬礼》堪称绘画中的“人间喜剧”,而《石工》则深刻揭示了社会的矛盾,表现了作者对劳动人民的同情。勤劳朴实的农民画家米勒,以醇厚真挚的感情,歌颂了辛勤劳作的农民。


政治讽刺画家杜米埃创作了大量思想深刻而形象夸张的石版画油画德国女版画家柯勒惠支,以社会民主主义思想和鲜明的个人风格创作了反映工人运动农民革命的系列铜版画和石版画。俄罗斯的批判现实主义产生了列宾苏里科夫等杰出画家。法国雕塑大师罗丹的作品也具有一定的现实主义品质。


19世纪后期在法国产生了印象派。此派绘画以创新的姿态出现,它反对当时已经陈腐的古典学院派的艺术观念和法则,受到现代光学色彩学的启示,注重在绘画中表现光的效果。代表画家有马奈莫奈雷诺阿德加毕沙罗西斯莱等。


继印象派之后还出现了新印象派(代表画家是修拉西涅克)和后印象派(代表画家是塞尚凡高高更)。而实际上后印象派与印象派在艺术主张并不相同甚至完全相反。其中凡高的绘画着力于表现自己强烈的情感,色彩明亮,线条奔放。高更的画多具有象征性的寓意和装饰性的线条和色彩。塞尚绘画则追求几何性的形体结构,他因而被尊称为“现代艺术之父”。



20世纪时期至今



杜尚的作品《泉》

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杜尚的作品《泉》



20世纪以来,现代美术呈现出流派迭起,千姿百态的局面。1905年诞生的以马蒂斯为代表的野兽派绘画,强调形的单纯化和平面化,追求画面的装饰性。1908年崛起的以布拉克毕加索为代表的立体派绘画继承了塞尚的造形法则,将自然物象分解成几何块面,从而从根本上挣脱传统绘画的视觉规律和空间概念。


随着德国1905年桥社1909年蓝骑士社的先后成立,表现主义作为一种重要流派登上画坛,此派绘画注重表现画家的主观精神和内在情感。


1909年在意大利出现了未来主义美术运动,此派画家热衷于利用立体主义分解物体的方法表现活动的物体和运动的感觉。抽象主义的美术作品大约于1910年前后产生,其代表画家有俄罗斯画家康定斯基和荷兰画家蒙德里安,而两人又分别代表着抒情抽象和几何抽象两个方向。


第一次世界大战期间产生的达达主义思潮,此派艺术家不仅反对战争、反对权威、反对传统,而且否定艺术自身,否定一切。杜尚将达·芬奇的《蒙娜丽莎》画上胡须,并将小便池作为艺术品,便是达达主义思想的体现。


随着达达主义运动消退,在此基础上出现了超现实主义艺术思潮。此派画家以柏格森直觉主义弗洛伊德精神分析学梦幻心理学为理论基础,力图展现无意识和潜意识世界。其绘画往往把具体的细节描写与虚构的意境结合在一起,表现梦境和幻觉的景象。代表画家有恩斯特雷內·馬格利特夏卡爾达利胡安·米羅等。


第二次世界大战后在美国产生的以波洛克德·库宁为代表的抽象表现主义绘画,综合了抽象主义、表现主义的特点,强调画家行动的自由性和自动性。


20世纪50年代初萌发于英国、50年代中期鼎盛于美国的波普艺术,继承了达达主义精神,作品中大量利用废弃物、商品招贴、电影广告和各种报刊图片作拼贴组合,故又有新达达主义的称号。代表人物有美国画家约翰斯劳生柏安迪·沃荷等。


70年代兴起的超级写实主义(或称照相写实主义)运动,其主要特征是利用摄影成果,进行客观的复制和逼真的描绘。代表画家有克洛斯佩尔斯坦,雕塑家中,安德烈汉森最为著名。除上述之外,可以归入现代艺术范畴的还有偶发艺术大地艺术等。其许多艺术活动已经超出了美术的范围。