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Acute Gastrointestinal Bleeding in COVID-19 Patients: A Systematic Review and Meta-Analysis
Umair Iqbal,Hafsa Anwar,Hafiz Umair Siddiqui,Muhammad Ali Khan,Faisal Kamal,Bradley D. Confer,Harshit S. Khara 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.4
Background/Aims: More than 100 million people to date have been affected by the coronavirus disease-2019 (COVID-19)pandemic. Patients with COVID-19 have a higher risk of bleeding complications. We performed a systematic review and metaanalysisto evaluate the outcomes of COVID-19 patients with signs and symptoms of acute gastrointestinal bleeding (GIB). Methods: A systematic literature search was carried out for articles published until until November 11, 2020, in the Embase,MEDLINE, Web of Science, and Cochrane Library databases. We included studies on COVID-19 patients with signs and symptomsof GIB. Results: Our search yielded 49 studies, of which eight with a collective 127 patients (86 males and 41 females) met our inclusioncriteria. Conservative management alone was performed in 59% of the patients, endoscopic evaluation in 31.5%, and interventionalradiology (IR) embolization in 11%. Peptic ulcer disease was the most common endoscopic finding, diagnosed in 47.5% of thepatients. Pooled overall mortality was 19.1% (95% confidence interval [CI]; 12.7%-27.6%) and pooled mortality secondary to GIBwas 3.5% (95% CI; 1.3%–9.1%). The pooled risk of rebleeding was 11.3% (95% CI; 6.8%–18.4%). Conclusions: The majority of COVID-19 patients with GIB responded to conservative management, with a low mortalityrate associated with GIB and the risk of rebleeding. Thus, we suggest limiting endoscopic and IR interventions to those withhemodynamic instability and those for whom conservative management was unsuccessful.
The Financial Performance of Korean Manufacturing SMEs: Influence of Human Resources Management
KHAN, Umair,ZHANG, Yongan,SALIK, Madiha Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.8
The purpose of this study is to explore and empirically analyze the factors affecting the financial performance of Korean small- and medium-sized manufacturing companies, which are relatively insufficiently researched, in terms of human resource management (HRM). In particular, this study intends to examine the human resource management activities focusing on the individual influences of workers' attitudes on systems and policies as well as jobs and organizations. This study reviews previous research and discussions on the human resource management system, as well as the organization and job-related attitudes and financial performance of workers, for the formulation of two hypotheses. Among the HCCP data, the hypothesis was verified through reliability and correlation analysis and stepwise multiple regression analysis for small- and medium-sized manufacturing enterprises. The results show, firstly, that human resource systems and systems have the same effect, but there were differences in the degree of impact. Secondly, job satisfaction has a statistically significant influence on financial performance. Lastly, all worker/employee attitude determinants are statistically significant for both job satisfaction and organizational commitment. HRM, previously relatively overlooked, provided theoretical and practical implications by demonstrating the direct impact on financial performance and the impact of individual human resource management systems and policies.
Umair KHAN,Yongan ZHANG,Madiha SALIK 한국유통과학회 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.11
This study aims to examine OL as a potential mediating variable in the relationship between IT and organizational performance. Organizational learning (OL) has been proposed as the mechanism to accomplish this task. Existing empirical research demonstrates that OL may indeed act as a mediator for the effect of IT on organizational outcomes. Also, existing literature discusses the use of technology in the organization, and the case for OL as the key knowledge process, and the intersection between technology and OL as a knowledgebased means for improving organizational performance. Many studies use a descriptive measure of OL despite the theory suggesting that a normative measure may be more appropriate. This study aims to address these concerns in a setting by using structural equation modelling (SEM) to compare the effectiveness of descriptive and normative measures of OL as mediating variables in knowledge-intensive organizations. Survey results support OL as a mediator between IT and organizational performance in addition to normative measures of OL outperforming descriptive measures. Implications for research and practice are discussed. To test the model, we will apply (SEM) structural equation modeling in the analysis of a moment structures (AMOS) on the empirical evidence collected from 218 Pakistani CEOs and top managers.
An improved co-training approach for document Sentiment classification
Jawad Khan(자와드 칸),Aftab Alam(아프타 발람),Muhammad Numan Khan(무함마드 누만 칸),Irfan Ullah(이르판 울라),Muhammad Umair(무하마드 우매르),Umair Qudus(구두스 우매르),Tariq Habib Afridi(타리크 하비브 아프리디),Sung Soo Park(박성수),Young-Koo Lee( 한국정보과학회 2020 한국정보과학회 학술발표논문집 Vol.2020 No.7
Design and Clinical Test of a Passive Ultrasound Probe Holder Mechanism for Arterial Puncturing
Muhammad Umair Ahmad Khan,Byung-Ju Yi 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.1
This paper proposes a new ultrasonography guided arterial puncturing and guidewire insertion mechanism. In conventional arterial puncturing, a physician holds an ultrasound probe in one hand and a needle in the other. Due to the prolong holding of ultrasound probe in hand, physicians and sonographers face musculoskeletal disorders. Also the contact force exerted by the hand of the physician is variable. The purpose of this study is to develop a passive device that will not only hold the ultrasound probe, but also performs needle and guidewire insertion with precision and accuracy. To test the effectiveness of the device, animal experimentation has been performed. This device showed 100% successful insertion rate and the operating time has been reduced from 4.5 minutes to 3.8 minutes. The proposed ultrasound probe holder exerts a stable contact force on the skin of the patient which helps to provide a stable image.
Umair Baig,Asif Ali Khan 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.29 No.-
Polyurethane-cerium(IV) phosphate composite cation exchange membranes were prepared by solutioncasting method in different stoicheometric ratios of polyurethane and cerium(IV) phosphate. Thestructure and morphology of the prepared membranes were ascertained by FTIR, SEM, TGA and DTA. Themembrane having composition 1:2 (PU: cerium(IV) phosphate) shows best results for ion-exchangecapacity, water content, porosity, thickness and swelling. The Cu(II) selective electrode was developed byusing this membrane for the determination of Cu(II) in solutions. The accuracy of the procedure has beentested on drinking water samples spiked with known amounts of Cu(II) and results were comparable tothose generated by Atomic Absorption Spectrophotometer.
Impact of Store Atmosphere on Impulse Buying Behaviour : Moderating Effect of Demographic Variables
Umair Akram,Peng Hui,Muhammad Kaleem Khan,Muhammad Hashim,Shahid Rasheed 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.7
Impulse buying as an unplanned purchasing decision is influenced by several factors. This study explores the relationship between store atmosphere and impulse buying behavior (IBB). It also examines how demographic variables such as age, gender, and education affect the relationship between store atmosphere and IBB. Mall intercept technique was used to collect data from over seven hundred shoppers from eighteen mega stores in Pakistan using self administered questioners. In order to analyze the data and test the Hypothesis, Structure Equation Modeling (SEM) technique was used. The results suggest that store atmosphere has positive relationship and significant influence on IBB. Additionally, it reveals that only one demographic variable i.e. age has substantial influence on IBB while other variables such as gender and education bear insignificant relationship with IBB. Age moderates the relationship between store atmosphere and IBB. This study is a valuable addition in the existing literature and the findings of the study would be helpful in making different selling and retailing decisions. From a managerial perspective, it is recommended that marketers and the retail managers can considerably enrich the IBB through improving the store environments. In contrast to the common studies that research the impact of store atmospheres on IBB, this research mainly takes into account the demographic variables as moderators.