Application of 3D Scanning as an Indirect Method to Analyze and Eliminate Errors on the Manufactured Yoke-Type Forgings Forged in SMED Device on Modernized Crank Press

This article proposes an indirect measurement method based on a dimensional and shape analysis of forgings for the evaluation of the manufacture and the proper operation of the key elements of the crank press, in which after modernization, a quick tool assembly based on SMED (Single Minute Exchange of Die) was implemented. As a result of the introduced changes aiming at improving the forging aggregate and increasing the production efficiency, errors were observed on the manufactured products-forgings in the form of twists and joggles. In order to solve the problem, a lot of advanced methods was used, including: dynamic system of deformation analysis, numerical modeling and as well as dimensional and shape analysis by 3d scanning. Despite the above, this approach (classic way) did not solve the problem. A proprietary method with the use of 3D reverse scanning was proposed, which allows to solve the problem of forgings errors. Based on the measurement results and analyses for a few variants of production cycles, the necessary changes were obtained, making it possible to minimize the errors and obtain proper products in respect of geometry and quality.     

Physical activity as a proxy to ameliorate inflammation in patients with type 2 diabetes and periodontal disease at high cardiovascular risk

While the beneficial impact of physical activity has been ascertained in a variety of pathological scenarios, including diabetes and low-grade systemic inflammation, its potential remains still putative for periodontal health. Periodontal disease has been associated with inflammatory systemic alterations, which share a common denominator with type 2 diabetes mellitus and cardiovascular disease. Physical exercise, along with nutritional counseling, is a cornerstone in the treatment and prevention of type 2 diabetes, also able to reduce the prevalence of periodontal disease and cardiovascular risk. In addition, considering the higher incidence of periodontitis in patients with type 2 diabetes compared to healthy controls, the fascinating research question would be whether physical activity could relieve the inflammatory pressure exerted by the combination of these two diseases. This multi-disciplinary viewpoint discusses available literature in order to argument the hypothesis of a “three–way relationship” linking diabetes, periodontitis, and physical activity.     

逐瘀止血汤加减治疗慢性子宫内膜炎气虚血瘀证的疗效观察

目的 评价逐瘀止血汤加减对慢性子宫内膜炎（CE）气虚血瘀证患者妊娠结局的影响及对免疫炎症因子的调节作用。方法 将144例患者随机按数字表法分为观察组和对照组各72例。观察组脱落、失访4例，剔除2例，完成66例；对照组脱落、失访3例，剔除5例，完成65例。两组均给予抗感染治疗14 d。对照组口服妇科千金片，6片/次，3次/d。观察组内服逐瘀止血汤加减，1剂/d。两组疗程均为3个月，并随访6个月。记录治疗前后月经经量、经期和周期变化情况；进行治疗前后宫腔镜和阴道彩色多普勒超声检查，评价子宫内膜形态、子宫内膜容受性（CP）［子宫内膜厚度、阻力指数（RI），搏动指数（PI）和血流指数（FI）］等，并进行子宫内膜病理检查；进行治疗前后气虚血瘀证评分；检测治疗前后月经血白细胞介素-1β（IL-1β），IL-6和肿瘤坏死因子-α（TNF-α）水平和外周血测T淋巴亚群（CD3⁺，CD4⁺，CD8⁺）水平；随访记录妊娠情况和流产情况。进行安全性评价。结果 治疗后观察组经量、经期、周期和月经完全正常率均高于对照组（P<0.05）；观察组子宫内膜厚度和FI均高于对照组（P<0.01），RI和PI均低于对照组（P<0.01）；观察组月经血IL-1β，IL-6和TNF-α水平均低于对照组（P<0.01）；观察组CD3⁺，CD4⁺水平和CD4⁺/ CD8⁺均高于对照组（P<0.01），CD8⁺水平低于对照组（P<0.01）；在6个月随访期间，观察组妊娠率46.97%（31/66），高于对照组的27.69%（18/65）（χ²=5.197，P<0.05）；观察组子宫内膜形态疗效总有效率为96.97%（64/66），高于对照组的86.15%（56/65）（χ²=4.981，P<0.05）；观察组子宫内膜病理组织疗效总有效率为95.45%（63/66），高于对照组的84.62%（55/65）（χ²=4.304，P<0.05）；观察组综合临床疗效总有效率为93.94%（62/66），高于对照组的81.54%（55/65）（χ²=4.696，P<0.05）；两组治疗期间均未发现与中药相关不良反应。结论 逐瘀止血汤加减治疗CE气虚血瘀证患者，可调经月经、减轻临床症状，改善宫腔镜下内膜形态，调节全身和局部的免疫炎症反应，提高了CP，从而改善了妊娠结局，有着较好的综合疗效，且安全。     

青年学生性健康知信行的自我分类偏差对相关问题求助意愿的影响

目的 探讨青年学生性健康知信行自我分类偏差对相关问题求助意愿的影响，为精准实施青年学生性健康促进提供科学依据。方法 2019年3-4月性健康和HIV感染风险评估干预微信小程序（"熊探"）测试期间的青年学生使用者纳入为研究对象。根据研究对象性健康知信行的自我分类和系统分类结果差异划分为3组，包括分类一致组、自我分类偏低组（自评比实际性资讯获取更少、性态度更传统、性经历更少）和自我分类偏高组（自评比实际性资讯获取更多、性态度更开放、性经历更多）。采用logistic回归分析3组研究对象的性健康相关问题求助意愿差异。结果 2 009名研究对象的年龄（19.2±1.1）岁，女性占54.7%（1 099/2 009），大专及以上者占98.4%（1 976/2 009）。性健康知信行自我分类一致、偏低和偏高者分别占49.0%（984/2 009）、10.9%（219/2 009）和40.1%（806/2 009）。与分类一致者相比，自我分类偏低青年学生的HIV自愿咨询检测服务接受意愿更低（aOR=0.65，95%CI：0.43~0.99），自我分类偏高青年学生的性相关疾病求助意愿更低（aOR=0.76，95%CI：0.59~0.98）。结论 性健康知信行自我分类偏差会降低青年学生对相关问题的求助意愿，尤其自我分类偏低会使青年学生低估HIV感染风险，接受咨询检测意愿下降，引起青年学生艾滋病疫情加速扩散。在性健康教育中需加强引导，提高青年学生群体自我评估能力、客观感知和应对风险。     

Predictive value of the coronary artery calcium score and advanced plaque characteristics: Post hoc analysis of the PREDICT registry

BackgroundWhether coronary plaque characteristics assessed in coronary computed tomography angiography (CCTA) in association with the coronary artery calcium score (CACS) have predictive value for coronary events is unclear. We aimed to examine the predictive value of the CACS and plaque characteristics for the occurrence of coronary events.MethodsAmong 2802 patients who were analyzed in the PREDICT registry, 2083 with suspected coronary artery disease (CAD) were studied using post hoc analysis. High-risk plaques were defined as having ≥2 adverse characteristics, such as low computed tomographic attenuation, positive remodeling, spotty calcification, and napkin-ring sign. An adjudicative composite of coronary events (cardiac death, nonfatal acute coronary syndrome, and coronary revascularization ≥3 months after indexed CCTA) were analyzed.ResultsSeventy-three (3.5%) patients had coronary events and 313 (15.0%) had high-risk plaques. Multivariate Cox proportional hazard analysis showed that high-risk plaques remained an independent predictor of coronary events (adjusted hazard ratio [HR] 1.95, 95% confidence interval [CI] 1.13–3.34, P ?= ?0.0154), as well as the log-transformed CACS (adjusted HR 1.24, 95% CI 1.11–1.39, P ?= ?0.0002) and the presence of obstructive stenosis (adjusted HR 5.63, 95% CI 3.22–10.12, P 0.0001). In subgroup analyses, high-risk plaques were independently predictive only in the low CACS class (<100).ConclusionThis study shows that assessment of adverse features by coronary plaque imaging independently predicts coronary events in patients with suspected CAD and a low CACS. Our findings suggest that the clinical value of high-risk plaques to CACS and stenosis assessment appears marginal.