Podiatric medical resources on the Internet

PURPOSE: To determine utility of polymerase chain reaction (PCR)-based urine screening for Chlamydia trachomatis in the care of adolescent females in an urban clinic. METHODS: Females > or = 15 years of age attending an adolescent clinic were approached consecutively. Each enrollee was interviewed to determine the primary reason(s) for the clinic visit and was queried about genitourinary symptoms. Nonsterile voided urine specimens were tested for C. trachomatis using PCR-based analysis. Endocervical C. trachomatis cultures were obtained from the subjects who had a pelvic examination. Main outcome measures were chlamydia infection rates in clinic attendees whether a pelvic examination was performed or not. RESULTS: A total of 315 (99.4%) of 317 patients approached agreed to participate. Overall, 47 (14.9%) patients had positive urine PCR tests. The chlamydia infection rate detected by urine PCR was 22.1% (19 of 86) among those who had pelvic examinations performed and 12.2% (28 of 229) among those who did not (p = .03; odds ratio 2.04; 95% confidence interval 1.02, 4.06). Sixty percent (28 of 47) of chlamydia infections identified during the study period were identified by the urine screening test. CONCLUSION: Urine screening was accepted by vast majority of female adolescents attending the clinic irrespective of reason for the clinic visit, and was highly effective in identifying unsuspected C. trachomatis infections, particularly among girls attending the clinic for reasons unrelated to reproductive health care and as an interim screening tool for adolescent family-planning clients.     

Displaying medical illustrations on the Internet

Subcutaneous and aerogenic vaccination of humans with live dry vaccine may be assessed using a new test: index of macrophageal transformation of peripheral blood monocytes. In addition, this method will help choose the optimal dose of vaccine.     

Challenges and opportunities of the Internet for medical oncology

PURPOSE: The internet, and in particular the world wide web (www), has a rapidly increasing potential to provide information for oncologists and their patients about cancer biology and treatment. A brief overview of this environment is given along with examples of how easily the information is accessed as a means of introducing the web page of the American Society of Clinical Oncology (ASCO), ASCO OnLine. METHODS: Oncology information sources on the www were accessed from the author's home using a 14.4 kbs modem, Netscape browser (Netscape communications Corp, Mountain View, CA), and the locations recorded for tabulation and discussion. RESULTS: Overwhelming amounts of oncology-related information are now available via the Internet. CONCLUSION: Oncology as a subspecialty is ideally suited to apply the newest information technology to traditional needs in areas of education, research, and patient care. Oncologists will increasingly act as information guides rather than information resources for patients and their families with cancer.     

Full text core medical journals on the Internet

Peer reviewed, core medical journals have an increasing presence on the Internet. A significant number of them offer full text articles without fees. This paper indexes these resources, and discusses ways to keep the list current.     

Comparison of medical and psychological tests.

Comments on the G. J. Meyer et al (see record 2001-00159-003) summary of evidence and issues associated with psychological assessment. H. N. Garb et al conclude that Meyer et al did not establish that psychological test validity is comparable to medical test validity. By focusing on meta-analyses, they ignored results for most medical tests and psychological test scores. Furthermore, although it may appear that they routinely summarized results from meta-analyses, in some cases they actually calculated their own effect sizes. For at least some studies, their effect sizes appear to be misleading, making their review of the literature difficult to interpret. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Pulmonary function tests in patients with congestive heart failure: effects of medical therapy

In a group of 13 patients with severe heart failure, both forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) significantly improved after intensive medical therapy (FVC: from 77 +/- 17 to 92 +/- 20%, p < 0.001; FEV1: from 65 +/- 15 to 81 +/- 15%, p < 0.001) in the absence of change in M-mode echo cardiac dimension and left ventricular systolic function; on the other hand, a change of indices of left ventricular filling by Doppler transmitral flow was documented (E/A ratio: from 3.6 +/- 1.2 to 1.65 +/- 1.5, p < 0.01; early filling deceleration time: from 94 +/- 39 to 178 +/- 78 ms, p < 0.01), indicating a reduction of pulmonary capillary pressure; this probably positively affected pulmonary interstitial edema and bronchial wall congestion, thus enhancing pulmonary function.     

基于InTouch和InControl的应用软件开发

介绍了Wonderware公司FactorySuite软件中的InTouch ,InControl以及I/OServer组件的应用开发方法 ,用其实现连续控制、逻辑控制和顺序控制 ,并列举了贮罐液位单回路PID控制应用实例 ,控制效果良好     

Pulmonary function tests and the diagnosis of bronchial asthma

A simple, heuristic model of a photographic emulsion is described for the purpose of illustrating the fundamental physical processes and emulsion properties which determine the characteristics of an x-ray film (viz., the shape of the H - D curve, film gamma, and film speed). By means of this model, it is shown that the contrast multiplication afforded by an x-ray film (i.e., a film gamma greater than unity) is a direct result of the exponential attenuation of the viewing light by the developed film, and that film gamma is proportional to grain size, grain density, and emulsion thickness. The difference in the H - D curve that is observed when the same film is exposed to light from an intensifying screen or directly to x rays is also predicted by the model.     

The medical device directives and their impact on the development and manufacturing of medical implants

For flexible peptides, nuclear Overhauser Effects (NOE) experiments do not provide enough information to ensure a correct definition of their solution structure. The use of distance constraints, derived from the knowledge of proton chemical shifts, is developed to restrict the number of possible conformations. In the case of flexible molecules, randomization appears as an important factor of the correct estimation of the chemical shifts from the 3D structure. The refinement of the solution structure of the highly flexible AVP-like parallel dimer is described to illustrate this process.     

基于ANSYS二次开发辊弯仿真

鉴于ANSYS自有的APDL参数化功能和冷弯成型的特点,利用ANSYS平台的开发环境,结合冷弯板料成型规律,建立弹塑性大变形有限元模型并采用动力显式算法对冷弯成型过程进行仿真计算分析,实现了在ANSY$界面下输入预设辊花参数,得到冷弯变形后板料的等效塑性应力应变,据此判断冷弯辊花设计是否合理,并给出修正建议,进行优化.