Empirical Research Published in \u3ci\u3eProduction and Operations Management\u3c/i\u3e (1992–2005): Trends and Future Research Directions

We review and evaluate empirical research in more than 150 papers published in Production and Operations Management (POM) during 1992 to 2005 to assess how far the papers’ authors have met the journal’s stated objective of promoting empirical research. We also assess the diversity of articles in terms of the purposes of research, data collection approaches, and data analysis techniques. We classify the empirical research articles based on their primary purpose (theory building, theory verifying, application, and providing evidence), data collection approach (case study, qualitative research, archival research, survey-based research, laboratory research, and field research), data analysis technique (descriptive statistics, various multivariate statistical techniques, and mathematical modeling), and operations topics (strategy, quality, and supply chain management). We also discuss directions for future empirical research in operations management. During 1992 to 2005, the articles based on empirical data have increased substantially from 30 to 50 percent of all articles published in POM. During 1992 to 1998, about three-fourths of the empirical research-based articles published in POM focused on the manufacturing industry, but recently the gap between the numbers of manufacturing- and service-focused articles published in POM has almost disappeared. While a previous assessment of articles published in a range of operations management journals showed that almost all of the empirical articles were based on either surveys or case studies, our results indicate that POM has published articles that were based on a much wider and more diverse range of data collection approaches. Production and Operations Management has clearly established itself as a leading outlet for publishing empirical research in operations management

Ranking Operations Management Conferences

Several publications have appeared in the field of\ud Operations Management which rank Operations\ud Management related journals. Several ranking systems\ud exist for journals based on , for example, perceived\ud relevance and quality, citation, and author affiliation.\ud Many academics also publish at conferences but we have\ud not come across publications that rank conferences.\ud Conference rankings are generally more complicated than\ud journal rankings. Journal rankings are primarily for\ud publishing purposes. Conferences on the other hand are\ud attended by people for different reasons. In this paper the\ud first attempt is made in developing an operations\ud management conference ranking based upon author\ud affiliation. Ranking based on an analysis of author\ud affiliation assumes that one important motive for\ud participants is to attend a high quality research\ud conference. With that assumption it is reasonable to use\ud the author affiliation approach. Based upon an existing\ud ranking of institutes that offer operations management\ud programs a ranking list of affiliations is developed.\ud Subsequently, we compare several operations\ud management related conferences such as POMS,\ud EurOMA, OSCM and the Operations Management\ud Division of the Academy of Management based on that\ud ranked list of institutes. The results provide information\ud for authors that help in deciding which operations\ud management oriented conferences to attend

Secured Scheme for Privacy Preserving and Node Authentication Mechanism for a Special Mobile Ad hoc Network

Opportunistic networks are a special type of Mobile Ad hoc network which are wirelessly interlinked nodes with the absence of end to end connectivity. All nodes in an opportunistic network are free to move in an environment. Due to the high degree of mobility of nodes, opportunistic networks differ significantly from the existing traditional networks and it works on store, carry &forward mechanism in which, each node has a communication range. Within its proximity, if any node comes, it can send and receive messages. In an opportunistic network, there is no proper infrastructure available for communication and node have limited storage and computational capabilities. The major problem being faced in an opportunistic network is the identification of normal and malicious nodes because due to the open nature of the opportunistic network, malicious nodes also can join the network and perform some malicious activities like Sybil attack. We propose a remedy to address the authentication and privacy issue that can arise in an opportunistic network. According to the findings of the simulation, the proposed research work satisfies the authentication and privacy criteria of an opportunistic network

Effect of Site-disorder, Off-stoichiometry and Epitaxial Strain on the Optical Properties of Magnetoelectric Gallium Ferrite

We present a combined experimental-theoretical study demonstrating the role of site disorder, off-stoichiometry and strain on the optical behavior of magnetoelectric gallium ferrite. Optical properties such as band-gap, refractive indices and dielectric constants were experimentally obtained by performing ellipsometric studies over the energy range 0.8 eV to 4.2 eV on pulsed laser deposited epitaxial thin films of stoichiometric gallium ferrite with b-axis orientation and the data was compared with theoretical results. Calculations on the ground state structure show that the optical activity in GaFeO3 arises primarily from O2p-Fe3d transitions. Further, inclusion of site disorder and epitaxial strain in the ground state structure significantly improves the agreement between the theory and the room temperature experimental data substantiating the presence of site-disorder in the experimentally derived strained GaFeO3 films at room temperature. We attribute the modification of the ground state optical behavior upon inclusion of site disorder to the corresponding changes in the electronic band structure, especially in Fe3d states leading to a lowered band-gap of the material.Comment: 18 Pages, 6 figure

COUMARINS: A UNIQUE SCAFFOLD WITH VERSATILE BIOLOGICAL BEHAVIOR

Benzopyrones are the club of compounds that can be coumarins or flavonoids. The hydroxyl derivatives of coumarins such as 4-hydroxycoumarins and 7-hydroxycoumarins have extensive biological activities which have employed for the synthesis of miscellaneous coumarin derivatives. These derivatives have exhibited impressive pharmacological and physiological activities such as anticoagulant, antibacterial, antiviral, antitumor, bactericidal, fungicidal, anti-inflammatory agents, and anti-HIV activity. This review comprised pharmacokinetic studies, including absorption, distribution, and metabolism of coumarin analogs along with toxicological studies. The studies of coumarins and their derivatives exhibiting immense pharmacological activity are also summarized in the current study

Designing the Process of Stores Management for Implementing ERP in Manufacturing Organization: Case Study

This paper describes the importance of ERP in manufacturing industries and examines the various articles published by eminent Researchers in the field of ERP. Enterprise Resource Planning (ERP) software presents a frame work for organizations to better utilize their processes. The report is about windows based application. The main idea of this paper is to handle the all details of stores management system. In this project software package has been developed to smoothen the processing of item transaction in stores such as item receive, item issue & report generation such as stock statement, issue register & receive register etc. This Software will help in automating all the process like receiving and issuing application in stores. Keywords – SQL, ERP, RM Stores, PM Stores, Client/Server technology

Dichlorido[μ-10,21-dimethyl-2,7,13,18-tetra­phenyl-3,6,14,17-tetra­aza­tricyclo­[17.3.1.18,12]tetra­cosa-1(23),2,6,8,10,12(24),13,17,19,21-deca­ene-23,24-diolato]dicopper(II) ethanol hemisolvate dihydrate

The dinuclear title complex, [Cu2(C46H38N4O2)Cl2]·0.5C2H5OH·2H2O, is located on crystallographic inversion centres with two half-mol­ecules in the asymmetric unit. The two CuII atoms are coordinated by a hexa­dentate dianionic ligand formed in situ from the condensation of two tridentate ligands by four imine N atoms and two bridging phenolate O atoms along with two Cl atoms at axial positions. The coordination geometry around the metal atoms is distorted square-pyramidal (τ = 0.185 and 0.199). The non-bonding Cu⋯Cu distances are 2.9556 (12) and 2.9506 (12) Å in the two dimers. The packing is stabilized through solvent-mediated inter­molecular O—H⋯O and O—H⋯Cl hydrogen bonds. The diamine chain of one of the dimers is disordered over two positions in a 0.680 (5):0.320 (5) ratio

Inter-rater and intra-rater agreement in causality assessment of adverse drug reactions: a comparative study of WHO-UMC versus Naranjo scale

Background: The causality assessment system proposed by the WHO collaborating centre for international drug monitoring, the Uppsala monitoring centre (WHO-UMC) and the Naranjo probability scale are the generally accepted and most widely used methods for causality assessment. Both these scales are structured, transparent, consistent, and easy to apply with distinct advantages. The PvPI recommends use of WHO-UMC scale while many clinicians prefer Naranjo scale for its simplicity. As both these scales are used very widely in practise, it is important to study the level of agreement among them, to ensure proper interpretation of the causality assessment of the drugs. Objective was to study the inter-rater and intra-rater agreement in causality assessment of adverse drug reactions between WHO-UMC and Naranjo scale.Methods: A total of 200 cases were analyzed by three raters. Each ADR reporting form was analyzed by the raters independently using both the Naranjo scale and the WHO-UMC scale. The inter-rater and Intra-rater agreement of all the three raters was analyzed using kappa statistics.Results: The most common category of causality assessment was ‘possible’ which was around 73%, while the probable, definite and unlikely accounted for 23%, 3% and 1% respectively. The inter-rater agreement for the various categories of causality assessment when using Naranjo scale ranged from “very good to excellent” (Kappa value 0.95) while the same ranged from “good to very good” when the WHO-UMC scale was used (Kappa value 0.89) while the Intra-rater agreement for the three raters ranged from good to very good. The mean time (in minutes) taken for assessing the suspected adverse drug an ADR was 8. 26±2.53 for WHO-UMC scale while it was 14.18±3.44 when Naranjo scale was used.Conclusions: Both the WHO-UMC scale and Naranjo scale are reliable and valid tools for causality assessment but the Inter-rater agreement was slightly better with Naranjo as compared to WHO-UMC scale

An experience with COVID-19 positive pregnant patients at a tertiary care center

Background: The Covid-19 pandemic is a global phenomenon. The lockdown imposed by the central and state governments, has also led to restriction of movement of patients thus reducing their access to antenatal care. Our hospital was officially declared as a Covid-19 centre as per government directives. The hospital has been managing Covid-19 positive patients as per guidelines. We here present the data of management of COVID-19 positive pregnant patients.Methods: A retrospective study. All COVID positive patients admitted to the obstetric unit of the hospital from 23 March 2020 to November 2020 were analysed. A total of 96 COVID positive patients were analysed. The patients were analysed for antenatal complications, complications during delivery, mode of delivery and neonatal complications.Results: There was only one patient with major complications associated with COVID. Most of the patients were either asymptomatic or had mild symptoms. There was only one maternal mortality. 23 out of the 89 antenatal cases required emergency caesarean section. The caesarean section rate was higher in COVID positive patients though the caesarean sections were done for obstetric indications only. Three neonates tested positive for the virus. 2 of the neonate required NICU admission.Conclusions: COVID-19 is a completely unprecedented situation. The aim of this study was to demonstrate that the effect of COVID-19 on pregnant women is minimal. There were only 2 patients with major complications. The COVID positive pregnant patients can be managed effectively with proper personal protective equipment and adherence to guidelines