Heparin- induced thrombocytopenia (HIT): a case report of CABG patient

Heparin- induced thrombocytopenia (HIT) is an antibody mediated adverse effect of heparin therapy which is classified into two subtypes, HITI which is non-immune, spontaneously reversible thrombocytopenia and; HITII which is an autoimmune-mediated adverse effect of heparin therapy. In this case report, we described a 65-year old male patient with HITII after coronary artery bypass grafting.Key words: Heparin- induced thrombocytopenia, Heparin- induced thrombosis, coronary artery bypass grafting

Review of Person Re-identification Techniques

Person re-identification across different surveillance cameras with disjoint fields of view has become one of the most interesting and challenging subjects in the area of intelligent video surveillance. Although several methods have been developed and proposed, certain limitations and unresolved issues remain. In all of the existing re-identification approaches, feature vectors are extracted from segmented still images or video frames. Different similarity or dissimilarity measures have been applied to these vectors. Some methods have used simple constant metrics, whereas others have utilised models to obtain optimised metrics. Some have created models based on local colour or texture information, and others have built models based on the gait of people. In general, the main objective of all these approaches is to achieve a higher-accuracy rate and lowercomputational costs. This study summarises several developments in recent literature and discusses the various available methods used in person re-identification. Specifically, their advantages and disadvantages are mentioned and compared.Comment: Published 201

Seismic Behavior of High-Performance Fiber-Reinforced Cement Composites Beam-Column Connection with High Damage Tolerance

Abstract The purpose of this study is to investigate and evaluate the feasibility of using high-performance fiber-reinforced cement composites (HPFRCC) to satisfy the requirement of transverse reinforcement in beam-column joint under seismic loads. The basic mechanical properties of the HPFRCCs are determined by compression, uniaxial tension, and direct shear tests. Four half-scale exterior beam-column connections are cast and tested under cyclic loads. The cracking patterns, hysteresis behavior, ductility, energy dissipation with damping characteristics and joint shear capacity of the HPFRCC beam-column connections are analyzed, investigated, and compared to the cyclic responses of normal concrete connections designed with/without seismic criteria of ACI. The test results revealed that HPFRCC connections considerably enhances shear and flexural capacity and also improved the deformation and damage tolerance behavior in post-cracking stage comparing to normal concrete connections in ultimate stages. Also, the failure mode of HPFRCC specimens changed from shear mode to flexural mode comparing to the connections without seismic details. Severe damages are observed in normal concrete connection designed without considering seismic criteria. Wide diagonal cracking and damage are observed on the designed NC connections under large cyclic displacement at drift 6%. However, in HPFRCC connections, joint remained intact without any cracks and damage until the test end. This implies that the shear stress requirement can be satisfied without any need to the transverse reinforcement in the HPFRCC joint

The Relation between Earnings Quality and Information Asymmetry in the Firms

In two recent decades, researches focus has been turned from the relation between earnings and returns or stock price behavior towards earning quality, financial reporting quality and their effects on capital market. Besides, information asymmetry and its consequences are among the most vital issues to be dealt with in all the capital markets including Iranian Capital Market. Therefore, this paper, relying on the theoretical principles, attempts to examine the relation between earnings quality and information asymmetry in the firms listed in Tehran Stock Exchange as between 2004-2008.To examine the research hypotheses, different testing methods (Mann-Whitney Test, Sign Test, and Wilkakson test) have been applied. The findings of the study show that the difference between the information asymmetry of the companies with low earnings quality, on the one side, and the companies with high earnings quality, on the other side, is not significant. Also the levels of information asymmetry have increased in the period after the earnings announcement, as compared to the period before it. To examine the research hypotheses, different testing methods (Mann-Whitney Test, Sign Test, and Wilkakson test) have been applied. The findings of the study, finally, revealedthat the difference between the information asymmetry of the companies with low earnings quality, on the one side, and the companies with high earnings quality, on the other side, is not significant. The findings also showed that the levels of information asymmetry have ascended in the period after the earnings announcement, as compared to the period before it

Application of Viscous Dampers in Seismic Rehabilitation of Steel Moment Resisting Frames

In structural seismic rehabilitation, the structural capacity spectrum curve can be enhanced by increasing the stiffness and strength of the structures and also the application of the energy dissipation systems such as dampers can decrease the structural demand spectrum curve. Dampers are basically used to mitigate the structural response and decrease the damages to the main structural elements under severe earthquakes through energy dissipation.At the present paper, it is aimed to evaluate the seismic behavior of two conventional steel moment resisting frames having 4, 8 stories incorporating seismic strength imperfection equipped with viscous dampers. OpenSees and nonlinear time-history analysis incorporating seven seismic records have been used to define the frame response. The results revealed that the seismic response of rehabilitated frames has been considerably improved. Where, the maximum roof displacement, the maximum story drift, the maximum floor acceleration and shears have been declined in damper equipped frames and the seismic performance of the most rehabilitated frame elements under an earthquake having return period of 475 years has been upgraded to performance level of life-safety

Application of Viscous Dampers in Seismic Rehabilitation of Steel Moment Resisting Frames

In structural seismic rehabilitation, the structural capacity spectrum curve can be enhanced by increasing the stiffness and strength of the structures and also the application of the energy dissipation systems such as dampers can decrease the structural demand spectrum curve. Dampers are basically used to mitigate the structural response and decrease the damages to the main structural elements under severe earthquakes through energy dissipation.At the present paper, it is aimed to evaluate the seismic behavior of two conventional steel moment resisting frames having 4, 8 stories incorporating seismic strength imperfection equipped with viscous dampers. OpenSees and nonlinear time-history analysis incorporating seven seismic records have been used to define the frame response. The results revealed that the seismic response of rehabilitated frames has been considerably improved. Where, the maximum roof displacement, the maximum story drift, the maximum floor acceleration and shears have been declined in damper equipped frames and the seismic performance of the most rehabilitated frame elements under an earthquake having return period of 475 years has been upgraded to performance level of life-safety

The Road to Developing Economically Feasible Plans for Green, Comfortable and Energy Efficient Buildings

Owing to the current challenges in energy and environmental crises, improving buildings, as one of the biggest concerns and contributors to these issues, is increasingly receiving attention from the world. Due to a variety of choices and situations for improving buildings, it is important to review the building performance optimization studies to find the proper solution. In this paper, these studies are reviewed by analyzing all the different key parameters involved in the optimization process, including the considered decision variables, objective functions, constraints, and case studies, along with the software programs and optimization algorithms employed. As the core literature, 44 investigations recently published are considered and compared. The current investigation provides sufficient information for all the experts in the building sector, such as architects and mechanical engineers. It is noticed that EnergyPlus and MATLAB have been employed more than other software for building simulation and optimization, respectively. In addition, among the nine different aspects that have been optimized in the literature, energy consumption, thermal comfort, and economic benefits are the first, second, and third most optimized, having shares of 38.6%, 22.7%, and 17%, respectively

Acquiring the Foremost Window Allocation Strategy to Achieve the Best Trade-Off among Energy, Environmental, and Comfort Criteria in a Building

The purpose of this investigation is to propose a way for acquiring the foremost window allocation scheme to have the best trade-off among energy, environmental, and comfort criteria in a building. An advanced decision-making tool, named the technique for order preference by similarity to ideal solution (TOPSIS), is utilized to find the best building amongst different alternatives for having windows on the building façades. Three conditions, namely two parallel, two perpendicular, and three façades, considered as A, B, and C types, respectively, are investigated. For each type, four possible orientations are studied. Heating, cooling, and lighting energy demands in addition to carbon dioxide equivalent emission and thermal and visual comfort are taken into account as the investigated criteria, and they are all evaluated in a simulation environment. The results show that for the modular residential buildings chosen as the case study and located in Tehran, Iran, having windows on the north and east façades is the best scheme. This alternative, which belongs to the B type, has about 40% and 37% lower heating and cooling energy demands than the C type’s foremost alternative. It is also able to provide about 10% better CO2 equivalent emission and 28% higher thermal comfort

Evaluation of the Sodium Serum Level in Infants with Jaundice

Background: Inadequate milk intake during the first year of neonate’s life can result in weight loss, severe hyperbilirubinemia, and sometimes hypernatremia. In this study, we aimed to determine the relationship between neonatal weight loss and hypernatremia in term breastfed infants with idiopathic jaundice, as well as the necessity of sodium concentration measurement in newborns with idiopathic jaundice via weight loss measurement. Methods: In this cross-sectional study, we examined 273 infants with jaundice of unknown etiology at Ghaem Hospital, Mashhad, in years 2008-2012. The study sample consisted of 226 infants in the control group (serum sodium concentratio