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Juan Carlos Alvarez Moreno,Hisham F. Bahmad,Christopher A. Febres-Aldana,Andrés Pirela,Andres Azuero,Ali Salami,Robert Poppiti 대한병리학회 2021 Journal of Pathology and Translational Medicine Vol.55 No.6
Background: Acute kidney injury (AKI) is a common cause of morbidity and mortality. It mainly targets the renal tubular epithelium with pathological changes, referred to as acute tubular injury. The latter is followed by a regenerative response that is difficult to visualize on routine hematoxylin and eosin (H&E) stains. In this study, we examined the regenerative capacity of renal tubules by correlating vimentin (VIM) immunohistochemical (IHC) expression and pathological findings of AKI and renal tubular regeneration (RTR) on H&E.Methods: We reviewed 23 autopsies performed in the clinical setting of AKI and RTR. VIM expression was scored in the renal cortical tubular epithelium using a statistical cutoff ≥ 3% for high expression and < 3% for low expression.Results: Of the 23 kidney tissues examined, seven (30.4%) had low VIM expression, and 16 (69.6%) had high VIM expression. Kidney tissues with evidence of AKI and RTR had significantly higher VIM expression. Renal peritubular microenvironment features showing regenerative changes on H&E were associated with high VIM expression. In the univariate model, kidney tissues with RTR were 18-fold more likely to have high VIM expression.Conclusions: In conclusion, our findings suggest that VIM could serve as an IHC marker for RTR following AKI. However, correlation with H&E findings remains critical to excluding chronic tubular damage. Collectively, our preliminary results pave the way for future studies including a larger sample size to validate the use of VIM as a reliable biomarker for RTR.
Development of a Machine Vision System for Automotive Part-Car Seat Frame Inspection
Nelson S. Andres(Nelson S. Andres),장봉춘(Jang Bong-Choon) 한국자동차공학회 2005 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
Meeting the growing demand deadlines, reducing the production cost and upgrading the quality control measurements are the reasons why the automotive part manufacturers are venturing into automation. Attaining these objectives is impossible with human inspection for many reasons. Accordingly, the introduction of machine vision system purposely for car seat frame inspection is presented in this study as an alternative for human inspection. This proposal is designed to meet the demands, features and specifications of car seat frame manufacturing companies in striving for increased throughput of better quality. More specifically, this computer-based inspection proposal is designed to perform quality measures to detect holes, nuts and welding spots on every car seat fiame in real time and ensuring these portions to be intact, precise and in proper place. In this study, the NI Vision Builder software for Automatic Inspection is used as a solution in configuring the aimed quality measurements. These quality measurement techniques for visual inspection are optimized through qualitative analysis and simulation of human tolerance on inspecting car seat frames. Furthermore, this study exemplifies the incorporation of the optimized vision inspection environment to the pre-inspection and post-inspection phases using LabVIEW software.
Regulation and Control of the Privatization of Security in Conflict Zones
Andres Macias 한국국제정치학회 2011 한국국제정치학회 기타간행물 Vol.2011 No.6
The presence of private providers of military and security services in conflict zones has increased in the aftermath of the Cold War. Although the use of Private Security Companies (PSC) and Private Military Companies (PMC) has become very popular among States, international organizations, and multinational corporations, regulation over them is scarce, insufficient, and inadequate. This paper examines the main reasons behind the tendency to rely on private security providers and the impact they have on the promotion of peace and on the safeguard of human rights in conflict areas. PSCs and PMCs carry out military training programs and in some cases bear the same duties and responsibilities as armies do, becoming also potential perpetrators of violations of human rights. Stricter control and regulation is needed in order to make their actions and omissions accountable. The privatization of security entails difficult challenges to the promotion of human rights and awareness on the implications they represent needs to be raised to national and international levels.
Non-Erosive Reflux Disease Manifested Exclusively by Protracted Hiccups
( Andres De Hoyos ),( Edgar A Esparza ),( Maria Cervantes Sodi ) 대한소화관운동학회 2010 Journal of Neurogastroenterology and Motility (JNM Vol.16 No.4
Hiccups are a benign physiological feature affecting almost everyone at one time or another. They tend to be short-lived and do not affect quality of life; however, there are various pathologies that may present with long-lasting hiccups. These are grouped into 3 categories according to their duration: acute, persistent and intractable or protracted hiccups. Intractable hiccups last longer than 2 months and are usually associated with more severe conditions. The association between intractable hiccups and reflux disease has not been previously documented by objective methods. This report describes the case of a 23-year-old female who presented with protracted hiccups; all other organic pathologies were ruled out, and endoscopy and conventional pH-metry confirmed a diagnosis of non-erosive reflux disease as the unique cause. (J Neurogastroenterol Motil 2010;16:424-427)
Modeling the confined compressive strength of hybrid circular concrete columns using neural networks
Andres W.C. Oreta,Jason M.C. Ongpeng 사단법인 한국계산역학회 2011 Computers and Concrete, An International Journal Vol.8 No.5
With respect to rehabilitation, strengthening and retrofitting of existing and deteriorated columns in buildings and bridges, CFRP sheets have been found effective in enhancing the performance of existing RC columns by wrapping and bonding CFRP sheets externally around the concrete. Concrete columns and piers that are confined by both lateral steel reinforcement and CFRP are sometimes referred to as “hybrid” concrete columns. With the availability of experimental data on concrete columns confined by steel reinforcement and/or CFRP, the study presents modeling using artificial neural networks (ANNs) to predict the compressive strength of hybrid circular RC columns. The prediction of the ultimate confined compressive strength of RC columns is very important especially when this value is used in estimating the capacity of structures. The present ANN model used as parameters for the confining materials the lateral steel ratio (ρs) and the FRP volumetric ratio (ρFRP). The model gave good predictions for three types of confined columns: (a) columns confined with steel reinforcement only, (b) CFRP confined columns, and (c) hybrid columns confined by both steel and CFRP. The model may be used for predicting the compressive strength of existing circular RC columns confined with steel only that will be strengthened or retrofitted using CFRP.
A Case Report : Bilateral tension pneumothoraces during minimally invasive parathyroidectomy
Andres Falabella,Michael W Lew,Walter L Chang,Eugene L Bak 대한마취과학회 2009 Korean Journal of Anesthesiology Vol.57 No.2
Minimally invasive parathyroidectomy, a new technique for the surgical management of parathyroid disease, is gaining popularity. The smaller incision in the neck results in better cosmetic results and patient satisfaction. Despite a low incidence of complications, the anesthesiologist should be aware and prepared to manage life saving situations. We describe a case of bilateral tension pneumothoraces during minimally invasive parathyroidectomy. (Korean J Anesthesiol 2009;57:246∼8)
Design optimization of reinforced concrete structures
Andres Guerra,Panos D. Kiousis 한국계산역학회 2006 Computers and Concrete, An International Journal Vol.3 No.5
A novel formulation aiming to achieve optimal design of reinforced concrete (RC) structures is presented here. Optimal sizing and reinforcing for beam and column members in multi-bay and multi-story RC structures incorporates optimal stiffness correlation among all structural members and results in cost savings over typical-practice design solutions. A Nonlinear Programming algorithm searches for a minimum cost solution that satisfies ACI 2005 code requirements for axial and flexural loads. Material and labor costs for forming and placing concrete and steel are incorporated as a function of member size using RS Means 2005 cost data. Successful implementation demonstrates the abilities and performance of MATLAB's (The Mathworks, Inc.) Sequential Quadratic Programming algorithm for the design optimization of RC structures. A number of examples are presented that demonstrate the ability of this formulation to achieve optimal designs.