ENHANCED CONTROL STRATEGY FOR HIGH SPEED WIRELESS NETWORKS

In 4G cellular networks, call admission control (CAC) has a direct impact on quality of service (QoS) for individual connections and overall system efficiency. Reservation-based CAC schemes have been previously proposed for cellular networks where a certain amount of system bandwidth is reserved for high-priority calls, e.g., hand-off calls and real-time new calls. Traditional reservation-based schemes are not efficient for 4G vehicular networks, as the reserved bandwidth may not be utilized effectively in low hand-off rates. We propose a channel borrowing approach in which new best effort (BE) calls can borrow the reserved bandwidth for high-priority calls. Later, if a hand-off call arrives and all the channels are busy, it will pre-empt the service of a borrower BE call if there exists any. Our focus in this paper is on the system modeling and performance evaluation of the proposed scheme. We present two system models that approximate the operation of the proposed scheme. For these models, we derive the CBP and CDP analytically. It is shown that our analytical results are very close to the ones obtained from simulations

BIOMEDICAL APPLICATIONS OF LARGE SCALE WIRELESS NETWORKS

The protection of the collected data is a major unsolved issue, with challenges coming from the stringent resource constraints of MSN devices, and the high demand for both security/privacy and practicality. In this paper, we propose a lightweight and secure system for MSNs. The system employs hash-chain based key updating mechanism and proxy protected signature technique to achieve efficient secure transmission and fine-grained data access control. Furthermore, we extend the system to provide backward secrecy and privacy preservation

Crystal structure determination, molecular modeling and surface analysis studies of 2-(4,6-dihydropyren-3-yl)-1H-benzodimidazole

Benzoimidazole compound has been synthesized and structurally characterized by single crystal X-ray diffraction studies, molecular docking and Hirshfeld surface analysis. The title compound C23 H14 N2 crystallizes in the Orthorhombic crystal system with the crystallographic space group of Pna21 with cell parameters a = 9.4472(5)Å, b=9.0556(5)Å, c=18.3755(11)Å, V=1572.03(15)Å3 and Z=4. The structure exhibits various intra and intermolecular interactions of the type N-H...N. Molecular docking studies of benzoimidazole compound have been executed with Cancer Osaka Thyroid kinease target protein which shows high binding affinity. In addition to this, Hirshfeld surface computational analysis have been carried out to analysis the hydrogen bond interaction. The major intermolecular contacts contributing to the Hirshfeld surface are H...H, H...N and H...C, respectively

COVID-19 and Acute Esophageal Obstruction Management in the Emergency Department: An U.S. multicenter research network propensity-matched analysis

Introduction- The Coronavirus Disease-2019 (COVID-19) caused by the novel SARS-CoV-2 led to significant strain on the Emergency Department (ED) visits worldwide. Multiple stay-at-home orders were issued during the pandemic unless medical treatment was urgently needed . Acute esophageal obstruction (AEO) due to food/ foreign body impaction usually present to the ED, given its severe symptoms. Most esophageal foreign bodies pass through the gastrointestinal (GI) tract uneventfully, and related mortality is very low. Still, most of these patients receive endoscopic interventions (up to 76%). The number of non-urgent endoscopies plummeted sharply during the pandemic to reduce exposure and preserve personal protective equipment. It is unclear if ED visits for AEO and their endoscopic management changed due to the COVID-19 pandemic in the United States (US). Methods- We utilized a federated cloud-based network database named TriNetX, which provides access to electronic medical records from 92 healthcare organizations from the US. The AEO adult patients hospitalized from January 1, 2020, to December 1, 2020, were compared to a similar timeline in 2019 from TriNetX. We used ICD-10 codes for food/foreign body in esophagus, causing other injury acute food impaction (T18.128 A, T18.12), foreign body esophagus (T18.198, T18.1, T18.19, T18.108, T18.108A). Outcomes of the study included utilization rates of esophagogastroduodenoscopy (EGD), esophageal perforation, inpatient hospitalization, and mortality. The outcomes were measured before and after 1:1 propensity matching of the groups based on the baseline demographics and comorbidities. Results- Prevalence of AEO among all ED visits in 2020 were 0.12% (5890 AEO ED visits among 4,672,024 total visits), compared to 0.17% (23,478 AEO ED visits among 14,199,648 total visits) in 2019. There was a small but significant decrease (0.05%) in AEO ED visits from pre-pandemic compared to pandemic times (P<0.01). Patient with AEO had higher prevalence of eosinophilic esophagitis (mean 270 [4.6%] vs. 885 [3.8%], p=0.004) and alcohol-related disorders (mean 465 5 [7.9%] vs. 1659 [7.1%], p=0.03) in 2020 group vs. 2019 group. Patients in the 2020-group had a lower EGD utilization (RR 0.63,95%CI:0.58–0.67, p<0.001) but esophageal perforation (RR 0.87,95%CI:0.41–1.82) and inpatient hospitalization rates (RR 0.92,95%CI:0.79-1.05) did not differ between two groups. Interestingly, during the pandemic, the AEO patients had a lower mortality rate (RR 0.23, 95%CI:0.17–0.31, p<0.001) than in 2019. Conclusion With the advent of COVID-19, multiple stay-at-home orders were issued in the US, with widespread healthcare services and utilization disruption. Patients have expressed concerns about visiting healthcare facilities due to the potential of the spread of SARS-CoV-2 . Many GI societies also recommended deferring elective procedures. This was due to a concern for potential transmission of the virus from aerosolization of GI secretions and judicious use of PPE, which resulted in an overall reduction in the number of endoscopies during the pandemic. Our study shows a small reduction (0.05%) of AEO ED visits in 2020 compared to 2019. However, EGD utilization plummeted to 63% for AEO in 2020. If this is due to spontaneous resolution of the food impaction or reduced presentations to the ED needs to be studied prospectively

Educating for urban sustainability: A transdisciplinary approach

An understanding of sustainability issues should be a key component of degree programmes. It is widely regarded as being a central attribute to professional practice and responsible global citizenship, arguably more so for the training of teachers since they potentially influence their students. This issue was brought to the fore when responsibility for delivering the 'design and the environment' course was transferred to the building discipline at the University of Newcastle in Australia as a result of restructuring. The attractiveness of the subject as an elective, the need to make it accessible to distance learning students and the desirability of applying transdisciplinary approaches to solving environmental problems presented the course designers with both challenges and opportunities, particularly in devising an assessment context within which students from multiple disciplines could be exposed to, and learn from each other's professional environmental evaluation norms. This paper describes an innovative holistic, multi-criteria problem-solving course design that allows a diverse mix of undergraduates to develop a transdisciplinary understanding of sustainability issues through the use of learning contracts. It reports the experiences of staff and students involved with the course, highlighting the beneficial outcomes

GenCLiP: a software program for clustering gene lists by literature profiling and constructing gene co-occurrence networks related to custom keywords

<p>Abstract</p> <p>Background</p> <p>Biomedical researchers often want to explore pathogenesis and pathways regulated by abnormally expressed genes, such as those identified by microarray analyses. Literature mining is an important way to assist in this task. Many literature mining tools are now available. However, few of them allows the user to make manual adjustments to zero in on what he/she wants to know in particular.</p> <p>Results</p> <p>We present our software program, GenCLiP (Gene Cluster with Literature Profiles), which is based on the methods presented by Chaussabel and Sher (<it>Genome Biol </it>2002, 3(10):RESEARCH0055) that search gene lists to identify functional clusters of genes based on up-to-date literature profiling. Four features were added to this previously described method: the ability to 1) manually curate keywords extracted from the literature, 2) search genes and gene co-occurrence networks related to custom keywords, 3) compare analyzed gene results with negative and positive controls generated by GenCLiP, and 4) calculate probabilities that the resulting genes and gene networks are randomly related. In this paper, we show with a set of differentially expressed genes between keloids and normal control, how implementation of functions in GenCLiP successfully identified keywords related to the pathogenesis of keloids and unknown gene pathways involved in the pathogenesis of keloids.</p> <p>Conclusion</p> <p>With regard to the identification of disease-susceptibility genes, GenCLiP allows one to quickly acquire a primary pathogenesis profile and identify pathways involving abnormally expressed genes not previously associated with the disease.</p

The Comprehensive Phytopathogen Genomics Resource: a web-based resource for data-mining plant pathogen genomes

The Comprehensive Phytopathogen Genomics Resource (CPGR) provides a web-based portal for plant pathologists and diagnosticians to view the genome and trancriptome sequence status of 806 bacterial, fungal, oomycete, nematode, viral and viroid plant pathogens. Tools are available to search and analyze annotated genome sequences of 74 bacterial, fungal and oomycete pathogens. Oomycete and fungal genomes are obtained directly from GenBank, whereas bacterial genome sequences are downloaded from the A Systematic Annotation Package (ASAP) database that provides curation of genomes using comparative approaches. Curated lists of bacterial genes relevant to pathogenicity and avirulence are also provided. The Plant Pathogen Transcript Assemblies Database provides annotated assemblies of the transcribed regions of 82 eukaryotic genomes from publicly available single pass Expressed Sequence Tags. Data-mining tools are provided along with tools to create candidate diagnostic markers, an emerging use for genomic sequence data in plant pathology. The Plant Pathogen Ribosomal DNA (rDNA) database is a resource for pathogens that lack genome or transcriptome data sets and contains 131 755 rDNA sequences from GenBank for 17 613 species identified as plant pathogens and related genera

Swift trust and commitment: the missing links for humanitarian supply chain coordination?

Coordination among actors in a humanitarian relief supply chain decides whether a relief operation can be or successful or not. In humanitarian supply chains, due to the urgency and importance of the situation combined with scarce resources, actors have to coordinate and trust each other in order to achieve joint goals. This paper investigated empirically the role of swift trust as mediating variable for achieving supply chain coordination. Based on commitment-trust theory we explore enablers of swift-trust and how swift trust translates into coordination through commitment. Based on a path analytic model we test data from the National Disaster Management Authority of India. Our study is the first testing commitment-trust theory (CTT) in the humanitarian context, highlighting the importance of swift trust and commitment for much thought after coordination. Furthermore, the study shows that information sharing and behavioral uncertainty reduction act as enablers for swift trust. The study findings offer practical guidance and suggest that swift trust is a missing link for the success of humanitarian supply chains

Innovative Capability of Building Information Modeling in Construction Design

The construction industry has long been urged to innovate, but innovation has been elusive because of the inherent social and organizational complexity of construction. Therefore, developing insight into the practice of innovating is needed to better understand and perform innovation in construction. Focusing on the practice of innovating requires exploring the enabling capability of solutions for practitioners to establish novel ways of doing things for improvement, referred to as ‘innovative capability.’ Building information modeling (BIM) has been promoted as an enabler of innovation in construction design because of its data management capabilities and the opportunities for interdisciplinary work based on them. Nevertheless, previous work presents divergent results exploring what BIM technologies can do for people and what people can actually do in BIM-enabled design practices, which presents confusion about the innovative capability of BIM. This paper aims to establish the basis of this confusion as a necessary step in developing more realistic ways of assessing and exploiting this capability. A conceptual continuum is proposed based on the functionalist/technology-centered and nonfunctionalist/human-centered perspectives on BIM to consider divergent arguments about its innovative capability; this continuum is used to analyze empirical findings from BIM-enabled design practices. The analyses suggest that individuals use BIM but are confused about its innovative capability because they adopt different views of BIM depending on their job and perspective. Given this, innovation is held back by the unexpressed differences between the views of BIM adopted by various practitioners who have to work together. It is argued that recognizing these differences, and working toward their reconciliation, is the way forward in establishing and exploiting the innovative capability of BIM