On cohomological dimension and depth under linkage

Some relations between cohomological dimensions and depths of linked ideals are investigated and discussed by various examples.Comment: 7 page

Tameness and Artinianness of Graded Generalized Local Cohomology Modules

Let $R=\bigoplus_{n\geq 0}R_n$, \fa\supseteq \bigoplus_{n> 0}R_n and $M$ and $N$ be a standard graded ring, an ideal of $R$ and two finitely generated graded $R$-modules, respectively. This paper studies the homogeneous components of graded generalized local cohomology modules. First of all, we show that for all $i\geq 0$, H^i_{\fa}(M, N)_n, the $n$-th graded component of the $i$-th generalized local cohomology module of $M$ and $N$ with respect to \fa, vanishes for all $n\gg 0$. Furthermore, some sufficient conditions are proposed to satisfy the equality \sup\{\en(H^i_{\fa}(M, N))| i\geq 0\}= \sup\{\en(H^i_{R_+}(M, N))| i\geq 0\}. Some sufficient conditions are also proposed for tameness of H^i_{\fa}(M, N) such that i= f_{\fa}^{R_+}(M, N) or i= \cd_{\fa}(M, N), where f_{\fa}^{R_+}(M, N) and \cd_{\fa}(M, N) denote the $R_+$-finiteness dimension and the cohomological dimension of $M$ and $N$ with respect to \fa, respectively. We finally consider the Artinian property of some submodules and quotient modules of H^j_{\fa}(M, N), where $j$ is the first or last non-minimax level of H^i_{\fa}(M, N).Comment: 18pages, with some revisions and correction

We were all in it together: Managing work from home as dual-earner households with school-age children

We examine how professional dual-earner couples, with school-age children, who worked from home during the COVID-19 lockdown, adjusted to the changes it brought to their lives. To do so, we conducted a qualitative study of 28 dual-earner households that had at least one school-age child, resided in China, Iran, Malaysia, the United Kingdom, or the United States, and worked from home during their local lockdown period. In each household, we interviewed the parents (56 total), and we asked at least one child to draw their perception of their parents\u27 work-from-home experience and narrate the drawing (31 total). Informed by work–home interface and family stress scholarships, we outline the resources and demands generated by working at home as a family, as well as the strategies families employed to manage their collective work from home. We extend work-from-home scholarship beyond the individual level by accounting for the roles of all collective members in the work-from-home experience. We complement the research that has studied individual- and couple-level work–family strategies by theorizing the supportive, attentive, relational, delegative, and compromising strategies families adopted to generate changes in resource-demand dynamics. In doing so, we introduce family adaptive capability for the context of adjusting to work from home and define it as a collective ability to initiate strategies to meet remote work demands with resources generated from the new work arrangement. At a practical level, the strategies presented in our work can inform employers of dual-earner couples and families experiencing similar dynamics

Calculating of Taftan Volcano Displacement Using PSI Technique and Sentinel 1 Images

Taftan is a semi-active volcano located in southeast of Iran with a number of craters. The main objective of this study is to investigate whether subsidence or uplift in Taftan peak. A total number of 58 images of Sentinel 1-A acquired between January 2015 to December 2020 in the ascending orbit mode and 102 images of both Sentinel 1-A, Sentinel 1-B acquired between October 2014 to June 2020 in the descending orbit mode were pre-processed for this purpose. The interferograms with the permanent scatterer interferometry (PSI) method were created using SARPROZ and StaMPS software in which atmospheric corrections were made automatically and following that get surface displacement of Taftan volcano. The results of the Line Of Sight (LOS) displacement corresponding to the uplift was observed to be 0.5 mm to 1 mm yr-1 for the ascending orbit and 1 mm yr-1 for the descending orbit. Because of GPS station lack close to Taftan volcano, the GPS measurements of one station located in the study area (Saravan station) was used to check the accuracy of PSI method, the GPS station of SARAVAN has been located inside of town and it is appropriate to use and analyze PSI technique in this station. As a result, it was found that the PSI method is in good agreement with the GPS data

On rationality of nonnegative matrix factorization

Nonnegative matrix factorization (NMF) is the problem of decomposing a given nonnegative n × m matrix M into a product of a nonnegative n × d matrix W and a nonnegative d × m matrix H. NMF has a wide variety of applications, including bioinformatics, chemometrics, communication complexity, machine learning, polyhedral combinatorics, among many others. A longstanding open question, posed by Cohen and Rothblum in 1993, is whether every rational matrix M has an NMF with minimal d whose factors W and H are also rational. We answer this question negatively, by exhibiting a matrix M for which W and H require irrational entries. As an application of this result, we show that state minimization of labeled Markov chains can require the introduction of irrational transition probabilities. We complement these irrationality results with an NP- complete version of NMF for which rational numbers suffice

Flexible Work Arrangements and Work-Family Conflict: A Metasynthesis of Qualitative Studies Among Academics

Quantitative research has reported variable and inconsistent findings regarding the relationship between flexible work arrangements (FWA) and work–family conflict (WFC). In this article, we address this inconsistency through the lens of qualitative research. We synthesize the findings of 45 qualitative studies from a variety of disciplines that have explored work–family interface (WFI) among academics whose profession offers high levels of FWA by nature. Analyzing the findings of these qualitative studies, we developed six themes of which five could be translated to moderators of the relationship between FWA and WFC. These moderator variables are boundary management preferences, time management skills and approach, career/family stage, nature of an academic job, and workplace culture. Our findings have theoretical, methodological, and practical implications for work–family and human resource development (HRD) scholars and practitioners motivated to improve the quality of employees’ work–life through initiation of FWA interventions

Techno-economic assessment and optimization of a solar-assisted industrial post-combustion CO2 capture and utilization plant

This paper studies the techno-economic feasibility of the solar-assisted regeneration process of the largest industrial CO2 removal monoethanolamine-based plant in Iran. The plant incorporating parabolic troughs is modelled using System Advisor Model software and the weather data are derived from the European Commission's Photovoltaic Geographical Information System. Sensitivity analyses are realized to evaluate the effect of important parameters, i.e., the solar multiple and the hours of storage, and to reveal the optimum case. The studied impacts are linked to the overall net energy generation and the levelized cost of heat (LCOH). The optimum case is found to have a solar multiple of 3.1 and 18-hours of storage, resulting in a solar share of 0.7 and a LCOH of 3.85 (¢/kWh). When compared to the base case (solar multiple of 2 and 6 h of storage), the optimum solution results in a similar LCOH but it achieves the generation of an additional 16,112 MWhth annually. The thermal energy supplied by the solar system leads to an annual reduction in the natural gas consumption of approximately 3.8 million m3 that results in a CO2 emission reduction of 7.1 kton.The corresponding authors would like to acknowledge the University of Tehran and the Iran’s National Elites Foundation for providing support at this work. The authors would also like to thank Paul Gilman from SAM support at the National Renewable Energy Laboratory. Last but not least, technical supports of the Kermanshah Petrochemical Industries Co. and the Shahrekord Carbon Dioxide Co. are gratefully acknowledged. Fontina Petrakopoulou would like to thank the Spanish Min- istry of Science, Innovation and Universities and the Universi- dad Carlos III de Madrid (Ramón y Cajal Programme, RYC-2016- 20971)

Anesthesia for elective caesarean section in patients with Wolff�Parkinson�White syndrome (WPW) - A case study

Introduction: Wolff�Parkinson�White syndrome (WPW) is an uncommon cardiac disorder which occurs due to presence of an aberrant pathway between atria and ventricles. Owing to its life threatening complications like paroxysmal supra ventricular tachycardia (PSVT) and atrial fibrillation (AF), this syndrome has been considered a challenge for anesthesiologists. Case Report: We report a known case of WPW syndrome that had been scheduled for elective caesarean section and managed successfully under general anesthesia. Management of the present case includes important points in the management of WPW syndrome. © 2015, Kurdistan University of Medical Sciences. All rights reserved