Physical Characterization and Recovery of Corroded Fingerprint Impressions from Postblast Copper Pipe Bomb Fragments

Pipe bombs made from 1 mm thick copper pipe were detonated with a low explosive power powder. Analysis of the physical characteristics of fragments revealed that the copper had undergone work hardening with an increased Vickers Hardness of 107HV1 compared with 80HV1 for unexploded copper pipe. Mean plastic strain prior to fracture was calculated at 0.28 showing evidence of both plastic deformation and wall thinning. An examination of the external surface showed microfractures running parallel with the length of the pipe at approximately 100 μm intervals and 1–2 μm in width. Many larger fragments had folded “inside out” making the original outside surface inaccessible and difficult to fold back through work hardening. A visual examination for fingerprint corrosion revealed ridge details on several fragments that were enhanced by selective digital mapping of colors reflected from the surface of the copper. One of these fingerprints was identified partially to the original donor.     

The Curse of the Smartphone: Electronic Multitasking in Negotiations

In this study, we have explored the use of mobile phones during negotiations. Specifically, we examined the effects that multitasking — reading messages on a mobile phone while negotiating face to face — had on the outcome achieved in a negotiation, as well as on perceptions of professionalism, trustworthiness, and satisfaction. Using an experimental design in a face‐to‐face dyadic negotiation, we found that multitasking negotiators achieved lower payoffs and were perceived as less professional and less trustworthy by their partners.     

Cardiac Changes Due to Electronic Control Devices? A Computer‐Based Analysis of Electrical Effects at the Human Heart Caused by an ECD Pulse Applied to the Body's Exterior

Electronic control devices (ECDs) deliver high‐voltage, low‐current energy pulses temporarily paralyzing a person. For the ECD–human interaction, we have developed a computer model using the SEMCAD program within which to simulate the electrical effects throughout the body resulting from the imposition of an ECD pulse at a particular point on the body surface. Our human body models were based on cross‐sectional MRIs and CT scans, with the dielectric properties of the various tissues assigned based on previously published values. We simulated the application of a single ECD pulse and calculated the resulting electric field strength and current and charge densities at different body locations. The results were compared with corresponding values obtained by other researchers in similar simulations. Furthermore, we simulated an application of a pulse of 20‐millisecond duration equal to the European household current of 50 Hz and to the ventricular fibrillation threshold. The resulting current level indicated at the heart muscle was 1/5 the level considered the threshold for triggering ventricular fibrillation.     

“大调解”衔接机制的理论建构与实证探究

多元化纠纷解决机制之建构是中国未来社会治理的必然选择。当前,诉讼调解与人民调解、行政调解、行业调解等非诉讼纠纷解决机制的衔接在探索中取得了明显的成就,也为进一步深入探索＂大调解＂提供了具体的实证参考。     

加味四妙勇安汤治疗急性放射性食管炎热毒壅盛证临床研究

目的 观察加味四妙勇安汤治疗急性放射性食管炎的临床疗效。方法 将57例急性放射性食管炎热毒壅盛证患者随机分为观察组（29例）和对照组（28例）,在氯化钠注射液100 mL联合维生素B12 0.25 mg 每日1次含漱常规治疗的基础上,观察组口服加味四妙勇安汤（配方颗粒）,对照组口服康复新液,两组均治疗6周,比较两组患者治疗前后吞咽疼痛视觉模拟量表（visual analogue scale,VAS）评分、中医症状评分及Karnofsky功能状态（Karnofsky performance status,KPS）评分,并评估临床疗效。结果 治疗后两组患者VAS评分均较治疗前显著降低（P＜0.05）,且观察组降低程度较对照组更为显著（P＜0.05）;对照组KPS评分较治疗前显著降低（P＜0.05）,而观察组KPS评分较治疗前显著升高（P＜0.05）,两组KPS评分差值比较,差异有统计学意义（P＜0.05）。治疗后对照组口干口苦评分较治疗前降低（P＜0.05）,胸骨后灼热疼痛、便秘评分均较治疗前升高（P＜0.05）;观察组口干口苦、胸骨后灼热疼痛、便秘评分均较治疗前降低（P＜0.05）。两组治疗后口干口苦、胸骨后灼热疼痛、恶心呕吐、便秘评分差值比较,差异均有统计学意义（P＜0.05）。观察组疗效显著优于对照组（P＜0.05）。结论 加味四妙勇安汤治疗急性放射性食管炎有较好疗效,能显著改善临床症状。