Automorphisms of abelian group extensions

Let $1 \to N \to G \to H \to 1$ be an abelian extension. The purpose of this paper is to study the problem of extending automorphisms of $N$ and lifting automorphisms of $H$ to certain automorphisms of $G$.Comment: 11 page

DISCOVERY OF VIRULENT APPS AND FAKE GRADING IN PLAY STORE

Existing content-based analysis tools not only cause high complexity and cost, but they also fail to handle large levels of files effectively. The proposed RTS methodology is implemented as a system remedy that can work on existing systems, such as the Hadoop file system, using the general interface of the file system and the use of information correlation properties. This document presents an almost real-time plan known as RTS to help an efficient and profitable search data analysis within the cloud. RTS extracts key property information of the given type by multidimensional features to represent these details in multidimensional vectors. An intuitive idea would be to significantly reduce the number of images used by analyzing only the most representative one instead of everything, at least once the mobile phone has an energy limit. RTS uses VFS operations to help semantic grouping. We can get the data from the closet of the page to help send them to the devil. We made a real-world situation of use in which children informed in a very busy environment are identified in time by analyzing 60 million images with RTS. RTS is created to exploit the correlation property of information through the use of hashing and a structured and manageable addressing

A comparative study of the fracture union between long and short proximal femoral intramedullary nails antirotation in the treatment of intertrochanteric femur fractures in the elderly: a multicentric analysis

Background: The objective of the study was to compare the fracture union of long vs. short proximal femoral intramedullary nail antirotation (PFNA) in the treatment of intertrochanteric fractures in elderly patients who was more than 60 years old.Methods: A retrospective analysis of 170 cases of intertrochanteric fractures of the femur (AO type A1 and A2) in the elderly was conducted. There were 64 males (37.6%) and 106 females (62.3%) with the age of 60–90 (mean age 75) years. The general demographic data of patients, operation time, intraoperative blood loss, length of hospital stay, blood transfusion rate, anterior thigh pain, postoperative complications like periprosthetic fractures, infections were recorded.Results: The short nail group also had a significantly shorter operation time (41.5±15.3 minutes vs. 62.5±25.3 minutes, p=0.002) and lower rate of postoperative transfusion (31.3% vs. 58.7%, p=0.041). However the length of hospital stay showed no significant differences. After surgery in short group there were 03 cases of periprosthetic fracture with a total incidence of 03%, however there were none in long nail group. At the end of the follow-up, all patients achieved bony union. The average fracture union time of the long nail group was (8.5±3.2) months, and the short nail group was (7.8±4.7) months, revealing no significant differences (p=0.09).Conclusions: Both the proximal femoral intramedullary long and short nail fixation has a good result in the form of fracture union in treating intertrochanteric femur fractures in the elderly. They showed no significant difference in terms of fracture union, hospital stay, and postoperative complications. The incidence of periprosthetic fractures and anterior thigh pain was slightly high in short nail group. In short intramedullary nailing group there was obvious decrease in the intraoperative blood loss, operation time and postoperative blood transfusion

Inclusion of Electrochemically Active Guests by Novel Oxacalixarene Hosts

We demonstrate for the first time the utility of oxacalixarenes as hosts and investigate the forces that influence the thermodynamics of binding

Manipulating the Cavity of a Porous Material Changes the Photoreactivity of Included Guests

Changing an ether to a ketone within the framework of a bis-urea macrocycle has little effect on the supramolecular assembly of this building block into porous crystals but introduces a triplet sensitizer into the framework that dramatically alters the photochemical reactions of included guests

Origins of Selectivity for the [2+2] Cycloaddition of α,β-unsaturated Ketones within a Porous Self-assembled Organic Framework

This article studies the origins of selectivity for the [2+2] cycloadditions of α,β-unsaturated ketones within a porous crystalline host. The host, formed by the self-assembly of a bis-urea macrocycle, contains accessible channels of ∼6 Å diameter and forms stable inclusion complexes with a variety of cyclic and acyclic α,β-unsaturated ketone derivatives. Host 1 crystals provide a robust confined reaction environment for the highly selective [2+2] cycloaddition of 3-methyl-2-cyclopentenone, 2-cyclohexenone, and 2-methyl-2-cyclopentenone, forming their respective exo head-to-tail dimers in high conversion. The products are readily extracted from the self-assembled host and the crystalline host can be efficiently recovered and reused. Molecular modeling studies indicate that the origin of the observed selectivity is due to the excellent match between the size and shape of these guests to dimensions of the host channel and to the preorganization of neighboring enones into favorable reaction geometries. Small substrates, such as acrylic acid and methylvinylketone, were bound by the host and were protected from photoreactions. Larger substrates, such as 4,4-dimethyl-2-cyclohexenone and mesityl oxide, do not undergo selective [2+2] cycloaddition reactions. In an effort to understand these differences in reactivity, we examined these host−guest complexes by thermogravimetric analysis (TGA), NMR, powder X-ray diffraction (PXRD) and molecular modeling

Absorption Properties of a Porous Organic Crystalline Apohost Formed by a Self-Assembled Bis-Urea Macrocycle

We report herein the characterization and binding properties of a microporous crystalline host formed by the self assembly of a bis-urea macrocycle 1. Bis-urea macrocycle 1 has been designed to crystallize into stacked hollow columns. The self-assembly process is guided primarily by hydrogen bonding and aromatic stacking interactions that yield crystals of filled host 1âacetic acid (AcOH). The AcOH guests are bound in the cylindrical cavities of the crystal. The guest AcOH can be removed by heating to form a stable crystalline apohost 1. Apohost 1 displays a type I gas adsorption isotherm with CO2 that is consistent with an open framework microporous material. Apohost 1 binds a range of small molecule guests with specific stoichiometry. The formation of these inclusion complexes does not destroy the crystal framework and therefore apohost 1 can be reused, much like a zeolite. We investigated the structure of apohost 1 and its inclusion complexes by powder X-ray diffraction. The ability of guests to bind and their stoichiometry could be rationalized on the basis of the size, shape, and polarity of the guest molecules. Finally, the shape selectivity of these self-assembled porous materials was demonstrated in competition studies in which apohost 1 preferentially bound p-xylene from a mixture of xylene isomers

Guest Induced Transformations of Assembled Pyridyl Bis-Urea Macrocycles

Pyridine macrocycles with no cavities assembled into close packed columns yet absorbed guests including hydrogen, carbon dioxide, and iodine

Performance of different weed management treatments on heat use efficiency of chickpea crop (Cicer arietinum) under rainfed conditions of Jammu

An experiment was undertaken during rabi 2008-09 and 2009-10 at Agronomy Research Farm, PRSS, Samba, SKUAST-J to find out the heat use efficiency of chickpea (Cicer arietinum L.) crop with different weed control treatments, viz. T1: weedy check; T2: Hand-weeding (HW) at 25-30 and 50-55 DAS; T3: Quizalofop-ethyl 40 g/ha at 20 DAS; T4: Quizalofop-ethyl 40 g/ha at 30 DAS; T5: Quizalofop-ethyl 50 g/ha at 20 DAS; T6: Quizalofop-ethyl 50 g/ha at 30 DAS; T7: Imazethapyr 25 g/ha at 20 DAS; T8: Imazethapyr 25 g/ha at 30 DAS; T9: Imazethapyr 40 g/ha at 20 DAS; T10: Imazethapyr 40 g/ha at 30 DAS; T11: Chlorimuron ethyl 4 g/ha at 20 DAS and T12: Chlorimuron ethyl 4 g/ha at 30 DAS evaluated in randomized block design with three replications under rainfed situations. Chickpea is a thermo-sensitive winter season crop. Heat use efficiency was computed at one month interval after sowing. The results revealed that heat use efficiency was found maximum at 90 DAS in chickpea crop. The heat use efficiency was found highest under hand-weeding at 25-30 and 50-50 DAS, however, the lowest values were found when herbicide Chlorimuron was used @ 4 g/ha at 30 DAS. The dry matter and seed yield are significantly differed among different weed control treatments. The heat use efficiency was found linearly (R2 = 0.70) related with dry matter accumulation at different days after sowing. The grain yield and biological yield heat use efficiency was found 0.33 and 0.90 kg/ha °C/day, respectively. The dry matter was found to be directly related to seed yield of chickpea crop with R2 = 0.98

Examining Temporal Change and Prediction of Future Land Use Using Geospatial Approach: A Case Study of Talpona River Watershed in Goa, India

Land-use change leads to environmental change on spatial and temporal scales. For better water resource management, understanding the interaction between land-use changes and local hydrology is crucial. This study analyzed the land-use change over past years and predicted the future one in Talpona river watershed in Goa. Land Change Modeler was used for change analysis between satellite images of 1993, 2014 and 2019 map for validation. The Kappa co-efficient of 0.73 indicated acceptable accuracy. Multi-Layer Perceptron neural network was used for prediction of land-use for 2030 and 2040. Results will aid in modeling future water flows and designing adaptation strategies