自然摄影师

正如我们的英国编辑Macrus Hawkins所发现的那样，这位最近才开始拍鸟的摄影师正在自然摄影领域里崭露头角。     

玛格南摄影师

20多岁就成了一名倍受尊崇的玛格南摄影师,乔纳斯·本迪克斯（Jonas Bendiksen）无疑是当今世界上最炙手可热的青年摄影师之一。我们英国的编辑Geoff Harris为大家揭开这位天才获得成功的秘诀。     

自然摄影师

正如我们的英国编辑Macrus Hawkins所发现的那样，这位最近才开始拍鸟的摄影师正在自然摄影领域里崭露头角。     

广告摄影师

Moraan Silk（摩根·西尔克）不但是位知名的广告摄影师，同时还是一个名副釜实的修图高手，数码后期成就了他独特的创作风格。     

纪实摄影师Nick Danziger

他是一个多才多艺且备受关注的摄影师。无论是艾滋病孤儿，还是英国首相布莱尔，尼克·丹斯格（Nick Danziger）都赢得大家的赞赏与信任。下面尼克将和我们一起分享他的摄影激情。     

园艺摄影师Clive Nichols

喜欢拍摄植物的摄影人注意了!顶级职业园艺摄影师Clive Nichols将把他拍摄花花草草的诀窍倾囊相授!     

摄影师震撼遗作

这张照片是一头愤怒的棕熊钻进帐篷张开血盆大口的场景,是一位因为摄影而不慎丧失了宝贵生命的摄影师拍摄下的最后遗作。近期,这张照片再次出现在公众眼前,让大家再一次开始怀念这位年轻却极富才华的摄影师——星野道夫。     

野生动物摄影师Steve Bloom

他拍摄的非洲野生动物照片享誉全球，其中究竟有何诀窍？史蒂夫·布鲁姆 （Steve Bloom）向我们倾囊相授     

商业广告摄影师的幽默

还记得儿时我们那些天马行空的想法,对未知世界各种的奇思妙想么？洛杉矶摄影师HughKretschmer就沿袭了儿时丰富的想象力,当然,作为一名老道的商业摄影师,他也有能力将这些想象通过影像来和我们分享。     

"白加黑减"全解析——完全掌握曝光补偿

数码相机的自动测光程序把我们从繁杂的手动曝光中解脱出来,让我们能有更多精力去考虑构图等其他问题。但自动曝光也有它的缺陷,当画面中暗色（反光率低）或浅色（反光率高）的物体占据大面积范围时,相机的测光系统就会对整体环境做出错误判断,＂擅自＂选择较多或较少的曝光量。     

用好光 出好片

<正>这里有你需要的、关于摄影的一切建议。本期重点:1.修正曝光和构图2.调整饱和度与锐化3.曲线与色彩调整4.暗部处理与构图控制5.修正曝光与恢复细节一张不错的照片和一张出色的照片有什么分别?什么元素能组成绝佳的构图?如果你需要一些建议来为日常的拍摄注入情趣,我们的专家会给你提供满意的答案。他们正在这儿等着你!这里就是你获取照片点评和得到实用建议的地方。如果你想听取关于自己作品的建设性意见,如果你想要全面提高自己的摄影水     

用好光 出好片

一张不错的照片和一张出色的照片有什么分别？什么元素能组成绝佳的构图,如果你需要一些建议来为日常的拍摄注入情趣,我们的专家会给你提供满意的答案。他们正在这儿等着你!这里就是你获取照片点评和得到实用建议的地方。     

The Measurement of Ambient Bioaerosol Exposure

Monitoring of ambient bioaerosol concentrations through the characterization of outdoor particulate matter (PM) has only been performed on a limited basis in North Carolina (NC) and was the goal of this research. Ambient samples of PM _2.5 (fine) and PM _10?2.5 (coarse) were collected for a six-month period and analyzed for mold, endotoxins and protein. PM _2.5 and PM _10?2.5 concentrations of these bioaerosols were reported as a function of PM mass, as well as volume of air sampled. The mass of PM _2.5 was almost twice that of the PM _10?2.5 ; however, the protein and endotoxin masses were greater in the coarse than the fine PM indicating an enrichment in the coarse PM. The protein and mold results demonstrated a seasonal pattern, both being higher in the summer than in the winter. Except for an occasional excursion, the endotoxin data remained fairly constant throughout the six months of the study.     

Exposure and risks from wearing asbestos mitts

Background  

Very high fibre inhalation exposure has been measured while people were wearing personal protective equipment manufactured from chrysotile asbestos. However, there is little data that relates specifically to wearing asbestos gloves or mitts, particularly when used in hot environments such as those found in glass manufacturing. The aim of this study was to assess the likely personal exposure to asbestos fibres when asbestos mitts were used.     

数码相机曝光时间标定方法研究

本文讨论了一种利用积分球均匀光源配合辅助快门标定数码相机曝光时间的方法．分析了相机感光器件的响应度线性、响应度均匀性以及相机快门的重复性对标定结果的影响，并给出了两种机型数码相机的标定结果．     

Exposure to welding particles in automotive plants

This work presents a monitoring study designed to evaluate workers' exposure to particles in several body shops within automotive plants. Concentrations in the proximity of welding activities were measured by a Fast Mobility Particle Sizer, several Condensation Particle Counters, a Nanoparticle Surface Area Monitor and a laser photometer, as well as by several gravimetric samplers. Average concentrations were found to be 1×10⁵ part cm^?3, 3×10³ μm² cm^?3 and 0.4 mg m^?3 for number, surface area and PM₁ concentration, respectively (worst case). Very high concentrations, particularly for surface area, were observed in locations with a high density of manual resistance welding activities or close to oxyacetylene welding activities. Welding emission factors in the automotive plants were also evaluated and in the most critical body shop, the overall welding activities led to emission factors of 2.8×10¹⁵ part min^?1, 7.0×10⁶ μm² min^?1 and 7.9 g min^?1 for number, surface area and PM₁ concentrations, respectively. Finally, particle concentration characterization, along with air exchange ratio measurements in the body shop, showed that the indoor concentrations and, hence, worker particle exposure can be reduced through the use of local exhaust ventilation.