Organic farming of maize crop enhances species evenness and diversity of hexapod predators.

Arthropod species diversity enhances ecosystem productivity and sustainability by increasing pollination and biological control services. Although, it is declining rapidly due to conventional agricultural intensification, organic agriculture with reduced reliance on agronomic inputs can regenerate ecosystems' resilience and restore them. Here, we report whether hexapod communities differ on both types of farming systems in small-scale field plot experiments, wherein Maize variety AG-589 was grown organically and conventionally in the 2020 and 2021 seasons. Livestock manure was applied in organic fields, whereas nitrogen and phosphorous were used as synthetic fertilizers in conventional fields. Hexapods were sampled three weeks after sowing once a week from the middle rows of subplots from both organically and conventionally grown maize. Twelve species of herbivores and four species of predators were recorded. Hexapod abundance overall and that of herbivores only was higher in conventionally cultivated maize, while predator abundance was higher in organic maize. Herbivores species diversity and evenness were significantly higher in conventional maize. Predator species diversity and evenness were significantly higher in organic maize fields. We noted predator abundance, diversity, and evenness as strong predictors to lower herbivore populations. These findings suggest that organic farming conserves natural enemies' biodiversity and regulates herbivores with increased provision of suitable habitats and prey resources for natural enemies, leading to enhanced relative abundance in their specialized niches. Thus, organic agriculture can potentially mediate better ecosystem services.

CSR initiatives, organizational performance and the mediating role of integrating CSR into management control systems: Testing an inclusive model within SMEs in an emerging economy.

This paper addresses a current gap in the literature by investigating the mediating role that integrating corporate social responsibility (CSR) into the management control systems (MCS) of small and medium-sized enterprises (SMEs) can play in the relationship between CSR initiatives and organizational performance. We propose, and empirically validate, an inclusive model to examine these relationships. The study then extends further by embedding two constituents of CSR integration into MCS: namely, management control technology and involvement of management accountants in CSR management. Our study is distinguished by validating, as a contribution, a single construct for each of these two constituents. Data were collected from 117 SMEs in an emerging economy, Abu Dhabi-UAE. PLS structural equation modeling was used in the data analysis. We find that CSR initiatives in SMEs influence organizational performance both directly and indirectly through MCS. Interestingly, the results show that only the involvement of management accountants in CSR management mediates the relationship between CSR initiatives and SME performance. This indicates that the role of human intervention prevails over technology intermediation in conveying the positive effect of CSR initiatives on organizational performance. Overall, the findings help to understand how MCS is an important driving mechanism whereby SMEs may derive performance outcomes from deploying CSR initiatives. The study concludes with implications for future research and policy-makers.

Sofosbuvir-based Treatment for HCV: A Safe Option in Patients Undergoing Hemodialysis.

The objective of this study was to ascertain the safety and efficacy of sofosbuvir in patients undergoing hemodialysis. Twenty-three HCV infected patients undergoing hemodialysis were included. Sofosbuvir was administered in combinations with ribavirin, daclatasvir and ledipasvir for 12-24 weeks. Viral response was checked at the end and 12 weeks after completing therapy. Twenty-one (91.3%) were of genotype 3 and two (8.7%) genotype 1. Eight (34.8%) had cirrhosis. Three (13%) were previous relapsers to sofosbuvir and ribavirin, while one (4.3%) was relapser to interferon. Sofosbuvir plus ribavirin was given to four (17.4%), sofosbuvir plus daclatasvir to eleven (47.8%), sofosbuvir plus daclatasvir plus ribavirin to four (17.4%), sofosbuvir plus velpatasvir to three (13%), and sofosbuvir plus ledipasvir to one (4.3%) patient. Twenty-one (91.3%) achieved viral eradication on completion of treatment; two were non-responders. Nineteen (82.6%) had undetectable virus 12 weeks after ending treatment and remaining two (8.7%) relapsed. Adverse effects were not observed. Hence, sofosbuvir can be safely used in patients undergoing hemodialysis. Key Words: Sofosbuvir, Hemodialysis, Hepatitis C.

Reduced Overhead Routing in Short-Range Low-Power and Lossy Wireless Networks.

In this paper we present enhanced routing protocol for low-lower and lossy networks (ERPL), a reduced overhead routing protocol for short-range low-power and lossy wireless networks, based on RPL. ERPL enhances peer-to-peer (P2P) route construction and data packet forwarding in RPL's storing and non-storing modes of operation (MoPs). In order to minimize source routing overhead, it encodes routing paths in Bloom Filters (BF). The salient features of ERPL include the following: (i) optimized P2P routing and data forwarding; (ii) no additional control messages; and (iii) minimized source routing overhead. We extensively evaluated ERPL against RPL using emulation, simulation, and physical test-bed based experiments. Our results demonstrate that ERPL outperforms standard RPL in P2P communication and its optimized P2P route construction and data forwarding algorithms also positively impact the protocol's performance in multi-point to point (MP2P) and point to multi-point (P2MP) communications. Our results demonstrate that the BF-based approach towards compressed source routing information is feasible for the kinds of networks considered in this paper. The BF-based approach results in 65% lower source routing control overhead compared to RPL. Our results also provide new insights into the performance of MP2P, P2MP, and P2P communications relative to RPL's destination-oriented directed a-cyclic graph (DODAG) depth, i.e., a deeper DODAG negatively impacts the performance of MP2P and P2MP communications, however it positively impacts P2P communication, while the reverse holds true for a relatively shallow DODAG.

Early Initiation Of Beta Blockers Following Primary Endoscopic Therapy For Bleeding Oesophageal Varices In Cirrhotics.

BACKGROUND AND AIMS: Beta-blockers provide secondary prophylaxis following endoscopic therapy for variceal bleeding. Guidelines recommend starting beta-blockers 6 days after endoscopy to prevent masking hemodynamic signs of re-bleeding. We aimed to see safety of earlier initiation of betablockers. METHODS: Cirrhotic patients with upper GI bleed were given intravenous vasoactive agents until undergoing endoscopy. Patients with only oesophageal varices as source of bleed were recruited. Vasoactive agents were discontinued following variceal banding. The patients were observed for 12-18 hours, discharged on oral carvedilol 6.25 mg BID and monitored for 6 weeks for re-bleeding and mortality. RESULTS: Fifty patients were included, 27 (54%) male and 23 (46%) female. Average age was 43±3 years. Aetiology of cirrhosis was HCV in 42 (84%), HBV in 6 (12%), HCV & HBV in 2 (4%) and indeterminate in 1 (2%) patient. Seventeen (34%) patients had Child A, 22 (44%) Child B and 11 (22%) had Child C disease. Hospital stay was under 24 hours in 24 (48%), 24-48 hours in 15 (30%) and 48-72 hours in 11 (22%) patients. Five (10%) patients underwent EGD within 6 hours of admission, 28 (56%) within 12 hours, 14 (28%) within 24 hours and 3 (6%) within 36 hours. No re-bleeding, mortality or drug related adverse effects were noted during 6 weeks after discharge. CONCLUSIONS: Our study proves possibility of shorter management of variceal bleeding by having a 12-18 hour monitoring after endoscopic banding, followed by beta-blocker initiation and discharge. This will safely reduce physical and financial burden on health services.

Operating systems for wireless sensor networks: a survey.

This paper presents a survey on the current state-of-the-art in Wireless Sensor Network (WSN) Operating Systems (OSs). In recent years, WSNs have received tremendous attention in the research community, with applications in battlefields, industrial process monitoring, home automation, and environmental monitoring, to name but a few. A WSN is a highly dynamic network because nodes die due to severe environmental conditions and battery power depletion. Furthermore, a WSN is composed of miniaturized motes equipped with scarce resources e.g., limited memory and computational abilities. WSNs invariably operate in an unattended mode and in many scenarios it is impossible to replace sensor motes after deployment, therefore a fundamental objective is to optimize the sensor motes' life time. These characteristics of WSNs impose additional challenges on OS design for WSN, and consequently, OS design for WSN deviates from traditional OS design. The purpose of this survey is to highlight major concerns pertaining to OS design in WSNs and to point out strengths and weaknesses of contemporary OSs for WSNs, keeping in mind the requirements of emerging WSN applications. The state-of-the-art in operating systems for WSNs has been examined in terms of the OS Architecture, Programming Model, Scheduling, Memory Management and Protection, Communication Protocols, Resource Sharing, Support for Real-Time Applications, and additional features. These features are surveyed for both real-time and non-real-time WSN operating systems.