数码影像技术在物证照相中的应用

随着数字技术的飞速发展，越来越多的刑事摄影人员发现，无论是影像信息采集、信息传递，还是影像处理、影像制作，数字影像技术与传统模拟影像技术由交互利用向完全取代的趋势发展，成为刑事技术领域多媒体应用技术重要的一部分。而数字相机、扫描仪正是生成数字影像的基本工具，尤其是随着图像处理软件和图像输出技术的进步，将数字影像技术推广应用于刑事技术工作，已显得越来越必需了。     

刑事影像技术的作用

1　刑事影像科学技术刑事影像科学技术是公安机关、国家安全机关和人民检察院的侦察部门、刑事技术部门以及其它依法可以进行勘验检查和物证鉴定的机构 ,以光学、化学等为理论基础 ,依照法定程序和办案工作的要求 ,运用摄影、摄像等器材和影像技术 ,记录、显现和检验与犯罪及物证鉴定有关的客体的一种专门手段。刑事影像技术包括刑事摄影、刑事摄像和刑事图像处理技术 ,是刑事科学技术的重要组成部分。刑事影像技术在揭露和打击刑事犯罪的斗争中起着重要的作用。1 1　刑事影像技术分类(1)根据影像形成特性和方式分为 :刑事摄影、刑事摄像、…     

缩微摄影技术和数字影像技术相结合促进档案事业发展

对缩微摄影技术、数字影像技术、数模整合技术的应用和特点进行了分析,指出缩微技术的发展方向是与数字技术紧密地结合起来,二者优势互补、互相支持、共同发展。     

发展是硬道理——协会更名综述

中国缩微摄影技术协会成立十多年来，积极有效开展工作，较好地完成了协会《章程》规定的各项任务，为促进我国文献管理领域缩微摄影技术和数字影像技术的应用、普及与发展起到了积极作用。得到了会员单位、个人会员以及广大文献影像技术人员的赞许和好评。     

商业摄影中的数字影像解析

一、前言 在数字技术进入到摄影领域后,任何一次技术上的革新都无法与数字技术对摄影的影响相提并论,数字技术不仅大大缩短了摄影的工作流程,而且丰富了摄影在艺术、商业等领域的表现手段,并且使摄影更加大众化、普及化.在当下,随着市场的需要,高品质的数字影像在商业摄影领域发挥着举足轻重的作用,数字技术已经完全渗透到商业摄影的整个工作流程当中.     

由"上海中国国际影像和摄影器材展览会"看影像技术设备的技术进展

2006年7月中国国际影像和摄影器材展览会在上海举行，130余家国内外知名厂家和影像媒体单位参加展出。一些世界影像业大公司在会上展出了一些最新产品，由此可以观察到近几年影像技术和工业的飞跃进步和发展方向。此次展览会展出的产品以数字影像输出设备为主，本文重点介绍一些性能突出、构思新颖、能反映影像技术新进展、特别引人注目的产品，供进一步研究探讨。     

摄像监视技术在刑事摄影中的应用

本文介绍了电视摄像监视技术在刑事摄影中的应用前景,从而从理论上证明了摄像技术对推动刑事摄影技术的提高和特种摄影在基层的普及所起到的重要作用。     

影室灯在刑事摄影中的应用

本文介绍人像摄影常用的影室灯，作为面光源，应用于刑事摄影中的痕迹拍摄。在一些痕迹的拍摄中取得良好效果。     

以协会更名为契机加快发展文献影像设备制造业

中国缩微摄影技术协会更名为中国文献影像技术协会，是协会发展历程中的一件大事，它反映了协会所服务的行业已从单一模拟技术跨入了模拟/数字影像复合技术的领域，即文献影像技术领域。其实这种技术跨越早在几年前就已经开始，现在“名正言顺”了，势必对协会今后工作的开展产生积极影响，从而促进整个行业的发展。     

刑事影像数字化配置方案的选择

本文综述了数字影像技术的现状及在刑侦领域的作用。根据刑侦工作的特点、要求，提出了刑事影像设备配置选择方案。     

Gender differences in publication productivity in psychology in India

An analysis of gender differences in psychology in India provides quantitative and qualitative assessment of R&D output contributed by psychologists with the indication of the trend of growth, skewness, relatedness, co-authorship pattern of productivity.     

Metrology in Chemistry in Germany

The system for Metrology in Chemistry in Germany is described. At the national standards level, a network of high-level chemistry institutes coordinated by the national metrology institute, PTB, provides the primary references for chemical measurements. A dissemination mechanism employs chemical calibration laboratories accredited within the framework of the German Calibration Service (DKD). They act as “multipliers” between the national standards level and the user level by providing the user with calibration means which are traceable to the SI via national standards. Traceability structures in clinical chemistry, electrochemistry, elemental analysis and gas analysis are described     

Natural radioactivity in drinking water in private wells in Finland

Natural radioactivity in drinking water was determined in population-based random study of 472 private wells. The mean concentrations of (222)Rn, (226)Ra, (234)U, (238)U, (210)Pb and (210)Po in drilled wells were 460, 0.05, 0.35, 0.26, 0.04 and 0.05 Bq l(-1), and in wells dug in the soil were 50, 0.016, 0.02, 0.015, 0.013 and 0.007 Bq l(-1), respectively. Approximately 10% of the drilled wells exceeded a radon concentration of 1000 Bq l(-1) and 18% a uranium concentration of 15 microg l(-1). The mean annual effective dose from natural radionuclides for a drilled well user was 0.4 mSv and 0.05 mSv for a user of a well dug in the soil. The effective dose arising from (222)Rn was 75% of the total of all natural radionuclides for drilled well users. As regards long-lived radionuclides, (210)Po and (210)Pb caused the largest portion of the effective dose. The dose arising from (238)U, (234)U and (226)Ra was only 8% of the total of all natural radionuclides.     

Natural radioactivity in drinking water in private wells in Finland

Radiation Protection Dosimetry     

Optische in situ Schichtdickenmessung in Bedampfungsanlagen. Optical in situ film thickness monitoring in coating systems

Optical film thickness monitoring is more precise than crystal monitoring. The optical measurement makes use of the fact that the intensity of a monochromatic light beam which is reflected on a film will change periodically with increasing film thickness. The measurement is performed at an exchangeable test glass that is positioned beside the substrates and is therefore coated in the same way as the substrates. The accuracy of cut‐off is achieved by a “fit” of a theoretical curve shape to the measured values. Order filters are used to ensure that, at a certain wavelength, higher deflection orders do not influence the measurement when a monochromator grating is used.     

Spanish experience in education and training in radiation protection in medicine

In most of its publications, the International Commission on Radiological Protection has highlighted the importance of education and training in radiation protection (RP) for medical exposures. Spain, like other Member States of the European Union, has implemented the Directive and the Guidelines in the medical area. The purpose of this paper is to present the Spanish experience in RP education and training in medicine, the different objectives established according to professional levels, existing regulations and feedback obtained from various RP actions.     

Differences in coagulation in clotting of vascular access in hemodialysis patients

Arteriovenous graft (AVG) thrombosis is a frequent cause of graft failure. We evaluated coagulation protein concentrations, platelet function, and viscoelasticity factors in 20 hemodialysis (HD) patients with AVGs. The goal was to determine whether significant differences in protein concentrations, platelet function, and viscoelasticity factors exist among dialysis patients requiring frequent AVG declot procedures vs. those who do not. Twenty HD patients were enrolled: 10 frequent clotters (>3 declots in the previous year) and 10 were nonclotters. Patients on antiplatelets or chronic anticoagulation were excluded. Laboratories were drawn pretreatment and heparinase was added to counteract any potential heparin effect. Coagulation protein concentrations including tissue factor (TF), thrombin/antithrombin III complex (TAT), and prothrombin fragment 1 + 2 (F₁₊₂) were assayed. The time to clot onset was measured by force onset time (FOT). Platelet contractile force (PCF) measured the force produced by platelets during clot retraction, whereas clot rigidity was measured as clot elastic modulus (CEM). FOT, CEM, and PCF were measured by Hemodyne. Both groups had upregulation of the TF pathway, as TF, TAT, and F₁₊₂ levels were similarly increased over baseline levels. Hemodialysis patients with frequent AVG clotting had higher levels of both PCF and CEM compared with nonclotters. Additionally, the frequent clotters had a lower FOT relative to nonclotters, although both were considered in the normal range. Our study suggests that HD patients with recurrent AVG thrombotic events form clots with higher tensile strength compared with HD patients without recurrent graft thrombosis.