bluuebunny/crossref_metadata_2025_split huggingface dataset:
ABOUT THE DESIGN OF SPHERO-CONICAL VESSEL CONSIDERING THE LIMITATIONS OF ADDITIVE TECHNOLOGIES
Authors: Lipovskyi V.I. 
Published: March 2023

Pressure vessels are widely used in in aerospace industry. It is due to recent emergence of new technological possibilities of additive manufacturing that made it possible to createmore advanced aircraft units with meeting the conditions of strength and minimum weight.
In this paper, the features of design of a spherical-conical high-pressurevesselwith respect to main process limitations of a new technology are considered. The rational shape of the vessel’sgeometry was determined within the conditions imposed by 3D printing technological limitations and analytical dependencies. Analytical relationships are based on the results obtained with the membrane theory of shells. The thickness of the spherical-conical vessel varies along its generator line and is determined by the fourth theory of strength. It is shown that the conditions of strength and technological restriction are always determined by distortion of the median surface in the joining area of conical and spherical parts of the vessel. The rational vesseldesign, consisting of a spherical, transitional and conical parts, allows to create an equal stress state when the ratio of radius to thickness of the sphere tends to infinity. The use of the spherical transition segment makes it possible to reduce the stress concentration in the transition zone from the spherical to the conical part.The geometry of the vessel containing thespherical transition part was determined. In the case of a constant cone thickness, the distortion of the median surface disappears, but the conical part will be underloaded. This design solution considers the technological limitation of the minimum shell thickness and is rational for large radius-to-thickness sphere ratios.
The results are true for spherical-conical vessels, with a sphere thickness-to-radius ratio less than or equal to 0.1 and a printingsurface inclination angle relative to the symmetry axis. They were tested on numerical models of spherical-conicalvessels with different radius-to-thickness ratios of the spherical part and can be recommended for practical implementation.
ЦІЛЬОВІ РІВНЯННЯ РКЛА НА ЕТАПІ РОЗРОБКИ ЕСКІЗНОГО ПРОЕКТУ
Authors: Шевцов В.Ю. , Давидова А.В. , Попов Р.С. 
Published: March 2023

The development of each new rocket and spacecraft (RS) must correspond to the target design function, which most often selects the minimum starting mass m0, or the minimum cost of the c0 project. When designing the RS of the minimum starting mass, mass equations of zero, first and second approximations are used. At the stage of development of the terms of reference, a mass equation is drawn up in which the value of the relative dry mass is set on the basis of statistical data from the previous kind of modification of the aircraft of this type and is an approximation of the zero order. After calculating the main flight and technical parameters of the designed RS, the value of the relative dry mass is specified by using the target given mass equations, in which the mass of the main compartments, systems and structures is determined through the basic flight and technical parameters, design parameters and statistical relative mass coefficients. The mass values of the individual components of the RS obtained in this way make it possible to calculate the flight and technical characteristics in the first approximation. After the design calculations of the first approximation, it becomes possible to clarify the values of the static coefficients of the reduced dry weight through the functional and operational parameters affecting the specific design, the physical and mechanical properties of structural materials, and other factors affecting the mass of the structure. The equations obtained in this way are called the detailed mass equations of the second approximation.
The presented sequence of compilation and use of target mass equations in the design of the minimum mass RS can also be used in the development of the RS project of minimum cost.
Cooperativa ‘tierra pa todos’
Authors: Arbeletche Favat Pedro , Buenahora Marcelo 
Published: March 2023

Este trabajo tuvo como objetivo realizar aportes para la evaluación de la política pública de acceso a la tierra para grupos asociativos, realizada a partir del estudio de la conformación y desarrollo de la organización cooperativa Tierra pa todos de asalariados rurales que accedieron a campos del Instituto Nacional de Colonización en el este del departamento de Paysandú de la República Oriental del Uruguay, durante la década del 2005-2015. El mismo se centró en el estudio de caso que accedió a dos fracciones de campo la Colonia Dr. Miguel C. Rubino. Dicha adjudicación se enmarca en el “Modelo No Tradicional de Colonización” implementado por el INC a partir del 2005 donde se prioriza la adjudicación de tierras a grupos de asalariados rurales y productores familiares organizados.
La metodología se basó en las técnicas de investigación cualitativa involucrando los principales actores sociales mediante la construcción de variables e indicadores que contribuyeran a los resultados del trabajo. Se utilizaron entrevistas semiestructuradas individuales y en grupo, la herramienta de diagnóstico participativo: análisis FODA y revisión documental proporcionado por el colectivo.
Dentro de las conclusiones se destaca que los asalariados rurales de este caso que accedieron a tierra asociativamente aumentaron su capacidad productiva y el patrimonio en semovientes tanto en lo individual como colectivamente y de esta forma mejoraron sus ingresos, complementando así sus salarios y/o economía que tenían antes de optar por esta propuesta. También les permitió mejorar las compras y ventas de ganado a la vez que accedieron a asistencia técnica.
Pendugaan Umur Simpan Ikan Patin Salai Menggunakan Metode Akselerasi Dengan Kemasan HDPE dan Teknik Pengemasan Aluminium Foil
Authors: Ayu Dewi Fortuna , Efendy Raswen , Nopiani Yanti , Saputra Edo , Haryani Syafitri 
Published: March 2023

The goal of this research was to estimate the shelf life of salai catfish using the ASLT (Accelerated Shelf-Life Testing) method with high-density polyethylene (HDPE) plastic, vacuum aluminum foil, and non-vacuum aluminum foil. By storing the salai catfish for thirty days at different temperature levels, namely 30, 35, and 40°C, the acceleration method was used to predict the shelf life. Changes in rancidity sensory and thiobarbituric acid (TBA) levels were observed. The obtained data were analyzed using linear regression to show the relationship between storage time and the measured variables. Furthermore, the Arrhenius method was used to calculate the shelf life of salai catfish in order to compare the quality degradation of salai catfish. The best result was obtained in the treatment of salai catfish with vacuum aluminum foil was 32,56 days at 30°C based on the TBA test. The regression equation were y= -2875,7x + 5,2812, R2= 0,9855.
Optimasi Proses Ekstraksi Bunga Telang (Clitoria ternatea) Berbantu Gelombang Mikro Menggunakan Aplikasi Response Surface Methodology
Authors: Azharini Rini , Widyasanti Asri , Nurhasanah Siti 
Published: March 2023

Butterfly pea (Clitoria ternatea) had a variety of active compounds that was the potential an alternative source of natural antioxidants. Procedures for isolating active compounds could been through microwave-assisted extraction. The purpose of this research was to found out the combination of solvent volume treatment, extraction time, and microwave power that produces optimum yield and analysis of extract quality characteristics. Microwave-assisted extraction process used 10 g of butterfly pea powder with a solvent volume of 150 ml to 250 ml, extraction time of 3 minutes to 7 minutes, and power by 30% to 70%. This study used the experimental methods and optimization processes with The Respon Surface Methodology (RSM) type Box-Behnken Design (BBD). Optimum conditions of the extraction process were obtained with a solvent volume of 196 ml for 3 minutes, and microwave power of 30%. The yield optimal response result was obtained by 53.39%, residual ethanol was 30.17%, total flavonoid compounds was 60.77 mgQE/g, specific gravity 1.082, pH 4.33 and color analysis L* 14.93, a* 0.14, b* -0.56, chromatic 0.56, hue 284.63 (Blue Purple), and TCD was in very different categories. This study analyzed that microwave-assisted extraction with variable solvent volume, time, and power affects the yield and quality characteristics of the extracts.
CRM-SYSTEMS IN MARKETING RISKS MANAGEMENT OF BANK`S RISK PROTECTION PROJECTS
Authors: Сhaikovskа M. P. , Stoyanov V. M. 
Published: March 2023

The article examines the theoretical, methodological and practical aspects of the formation of information and analytical support for marketing risk management of risk protection projects of a commercial bank in the conditions of modern challenges of the uncertainty of the marketing environment and global digital transformations. Requirements for an effective bank risk management system based on modern technological tools and innovative methodological approaches are formulated. The directions of the transformation of risk management paradigms were analyzed, the expediency of a systemic multidimensional approach to the implementation of integrated risk management based on modern international regulatory standards was clarified. The need for the convergence of project management methods in risk management for better prioritization of risks, consistency with the strategic goal of activity, and planning of steps to optimally achieve the goal is substantiated. The marketing orientation of bank risk protection projects is revealed. It is proposed to expand the list of banks' risks and to transform the weighting coefficients of the existing ones in the conditions of innovative technological transformations in order to strengthen socio-ecological responsibility to society. Particular attention is paid to determining the place of marketing risks in the management system of banks, as a critical element of an effective risk management model. The direction of improving the information and analytical support of the bank's risk protection projects through the implementation of CRM systems as an information communication tool and an information source on marketing risk management is proposed.
ANALYSIS OF SUITABILITY LAND FOR FLOOD-FREE SETTLEMENT IN BAOLAN DISTRICT TOLITOLI REGENCY
Authors: Ferdi Ferdi , Saputra Iwan Alim , Rahmawati Rahmawati , Budianta Aziz 
Published: March 2023

<p><span lang="EN-US">Baolan District, Tolitoli Regency, as a urban area is quite worrying, because it is often hit by floods. The settlement area is an area that is often affected, because the settlement area of Baolan District is in the vulnerable to very vulnerable class. This research was conducted in Baolan District from April to August 2021. The tools and materials used in this study were: a laptop, ArcGis 10.4 software, and secondary data (rainfall data, DEM data or Digital Elevation Model, soil type maps, and maps). RBI scale 1:50000). This type of research is quantitative descriptive with a spatial approach and using saturated sampling rules obtained from the entire population. The purpose of this study was to determine the distribution and level of suitability of land designated for flood-free settlements in Baolan District. The results of the analysis show that the suitability class that has the largest distribution area is the QS class (Quite Suitable) with an area of 31570.148 or 79.97%. Class S (Suitable) is the class with the smallest area of distribution, which is 538.892 or 1.37%, while the other class is class that is not suitable (N) with an area of 7368.287 or 18.66%. Class S (Suitable) indicates that the class is very wide good if it is developed for a useful area and inversely proportional to class N (Not Suitable). While QS (Quite suitable) is a class that is good enough to be developed into a useful area, but there are several things to consider. the condition of the area is quite steep and the topography is high, as a result it will cause natural hazards such as erosion and land slides. Another thing to consider is the area that covers the rain catchment area which should be predominantly functioned as a buffer zone.</span></p><p><strong> </strong></p><em></em>
Experimental Investigation on the Performance of Polymer-Coated Clay/Polyacrylamide Hydrogel for Water Shutoff Treatment
Authors: Roslan A. A. , Aziz N. A. A. , Dzulkarnain I. , Tewari R. D. , Jaafar M. Z. 
Published: March 2023

SummaryPolymer gel system has been identified as having the potential for blocking and diverting water flow. However, the current polymer reported an inability to maintain its mechanical strength, limited penetration depth, and instability in reservoir conditions of high temperature and high pressure. A distinctive bentonite nanomer clay (PGV)/acrylamide (AM)-co-2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) preformed particle gel with poly(ethylene glycol-b-tetramethylene oxide) (PEGTMO) coating to control the swelling kinetics is formulated. The in-house formulated gel’s ability to block and divert water flow in a porous medium is studied. The formation recipe of the gel was achieved by numerous swelling tests as induced by brine solution under reservoir conditions. Through the swelling tests, the long-term thermal stability of the gel solution was demonstrated. The incorporation of PGV clay particles improves the swelling and mechanical properties of the gel. Premature swelling can be avoided with PEGTMO coating as it slows the swelling rate over a 10-minute period, which gives the advantage of controlling the swelling before reaching the intended site of action during coreflood experiments. The rheological behavior of the hydrogel features rubber-like mechanical behavior with a viscosity value of 1.17 cp, which displayed water-like characteristics. Further, significant permeability reduction of large fractures is demonstrated by the coreflooding experiment with a calculated result of 96.2%. This formulated gel could offer the solution as a blocking agent in void space channels containing reservoirs that leads to a reduction of water cut due to thief zones.
An optimized protocol to detect high-throughput DNA methylation from custom targeted sequences
Authors: Iannuccelli Nathalie , Serre Rémy-Félix , Vandecasteele Céline , Lee Alonzo , Merlet Yann , Donnadieu Cécile , Demars Julie 
Published: March 2023

Abstract
The protocol describes a targeted methylation library preparation upstream short read sequencing with an Illumina instrument. The protocol includes the New England Biolabs Next Enzymatic Methyl-seq Library Preparation workflow combined with the Twist Bioscience Targeted Methylation Sequencing workflow. The protocol is divided into 8 steps: fragmentation, library preparation, enzymatic conversion, indexing, pooling, hybridization, capture and amplification. Main advantages are (i) the limitation of DNA degradation using enzymatic conversion, (ii) both the specificity and efficiency of the capture especially in CpG highly rich regions although this step is the critical step due to the temperature control, and (iii) the pooling of samples into 8-plex reducing handling time and experimental costs. However, the workflow takes three working days with several break points. This protocol can be performed in standard molecular biology laboratories and it’s suitable for 96 samples. This approach can be adapted to any interesting regions using a custom panel for agronomic species and model organisms but also in human as a diagnostic tool.
Optimal Relay Selection Strategy for Efficient and Reliable Cluster based Cooperative Multi Hop Transmission in Vehicular Communication
Authors: potula sravani , Ijjada Srinivasa Rao 
Published: March 2023

Abstract
Routing is the key issue for Vehicular Networks since each node in the network has mobility. Dynamic nature of vehicular networks increases with the mobility and the consequence is reflected over control traffic overhead. As a result, the routing technique and the type of node mobility information are completely dependent on building dependable end-to-end communication links. To address these challenges, a Reliable Cluster based Multi Hop Cooperative Routing (RCCR) strategy was proposed by using velocity, distance and link quality parameters. This algorithm obtains the tradeoff between Quality of Service (QoS) and mobility constraints over link parameters. It improves routing scalability by electing cluster-heads and selecting Multi-Point Relays (MPRs) while considering mobility constraints and QoS needs. The proposed technique determines the link quality for every pair of nodes based on values of signal strength and distance parameters. The relay vehicles are chosen based on the highest possible QoS value, which is calculated to assure route stability, reliability, and durability. The heuristic limitations of the multi-point relay selection strategy are handled by considering the link quality, distance from source vehicle, and cluster-head coverage area to enhance the Packet Delivery Ratio (PDR) of multi-hop network with tolerable End-to-End transmission delay. Further, we optimize and obtained optimal number of cooperative vehicles in every hop with the objective to minimize the end-to-end energy consumption. Finally, simulation results demonstrate the effectiveness of proposed algorithm compared to other state of art algorithms.
A Compact Microstrip Patch Antenna for X-Band
Authors: Borel Touko Tcheutou Stephane , Priyadarshini Rashmi 
Published: March 2023

Abstract
Nowadays, microstrip antennas are widely used in wireless applications. We have so many bands of frequency and we can list out L, S, X, Ka etc. For this work, we will be focusing on X bands only. The range of frequency of X bands is from 8 to 12 GHz. Design and simulate a compact microstrip patch antenna for X band applications are our main goals for this topic so that we will find out good results of antenna. The software used in this paper is HFSS 15 (High Frequency Structure Simulator 15). The proposed antenna is a rectangular microstrip patch with the dimensions of 6mm x 5mm using as substrate material FR4, dielectric constant 4.4 and operating frequency 11 GHz. After simulation, we got a gain equal to 2.8 dB, bandwidth equals to 700 MHz, directivity equals to 3.96 dB, VSWR (Voltage Standing Wave Ratio) equals to 1.24. These results show that antenna is very suitable for X bands applications (satellite communication, wireless computer networks, etc.)
Optimal Control of Computer virus Spreading model with partial immunization
Authors: Muthukumar Sumathi , Muthukrishnan Senthilkumar Senthil , Chinnadurai Veeramani 
Published: March 2023

Abstract

Nowadays, viruses and worms create the most critical problems in computer security issues. Hence, the spreading behavior of computer viruses and the investigation of their control measures are crucial since they will prevent massive economic losses and social panic. This study explores computer virus transmission with a partial immunization based on the Susceptible - Infected - Susceptible - Recovered - Susceptible (SISRS) model. Also, the virus spreading process is analyzed using the reproduction number R_0and stability analysis. The developed model is justified through stochastic simulations and compared with the existing SIRS model. Furthermore, the optimal control measures are found analytically and numerically. Numerically substantiated that the spread of infected nodes and the immunity loss can efficiently be managed when using an optimal control technique.
Clustering-based Energy-Efficient Resource Allocation in Cognitive Radio Based Smart Grid
Authors: Anbuselvi Cynthia , G Ananthi , T Aruna 
Published: March 2023

Abstract
Cognitive Radio (CR) has been recognized as one of the intellectual solutions for Smart Grid environment to transmit high volume data over various environments and distribute the electricity to the customers. The inspiration of this work is to reduce the interference and allocate channels efficiently that improves the and utilization fairness of the Smart Grid (SG) network through a clustering-based EnergyEfficient Power Allocation algorithm among Secondary Users. Mathematical equations have been developed for the performance parameters such as channel reward, user reward, Jain’s fairness index, throughput and power calculation which has been simulated using MATLAB R2020b.
Breaking Two Provably-Secure Certificateless Signcryption Schemes for Internet of Things
Authors: Du Hongzhen , Ma Shaoyi , Wen Qiaoyan , Zhang Shanshan 
Published: March 2023

Abstract
Recently, Gong et al. put forward a certificateless signcryption (CLSC) scheme suitable for Internet of things. The authors demonstrated that their scheme is confidential, unforgeable and forward secure, and it meets known session-specific temporary information security under the attacks of two Types of adversaries. More recently, Xu et al. constructed a CLSC mechanism suitable for edge computing on the basis of blockchain, and proved that their mechanism satisfies unforgeability and confidentiality. In this article, we first demonstrate Gong et al.’s scheme can be totally broken: every user can calculate the master secret key from the partial private key sent by Key Generation Center. Moreover, we prove that Gong et al.’s scheme is not confidential, unforgeable and forward secure, and it cannot enjoy known session-specific temporary information security, either. Next, we declare that Xu et al.'s mechanism is able to be universally forged by anyone, that is, everyone can forge valid signcryption ciphertexts of a sender on any message without knowing the sender’s secret information. Furthermore, Xu et al.’s mechanism is not CCA2 secure against two Types of adversaries.
A Gain Embedded V-Integrated Rectangular Slotted Triangular Edged (EVI-STE) Design for Wireless 5G Mobile Applications
Authors: N porchelvi , S Titus 
Published: March 2023

Abstract
This paper presents a new nonlinear ground fractal antenna design, named as, Embedded V-Integrated Rectangular Slotted Triangle Edged (EVI-STE) antenna for wireless communications. In this proposed design slots of different shapes have been loaded to optimize the characteristics of an antenna such as return loss, impedance matching, gain and radiation pattern. The proposed antenna is employed with defected ground to reduce the return loss and the antenna is fed by microstrip line. The peak gain is 3dB with VSWR < 2 which shows that there is good impedance matching throughout the circuit. Antennas are designed on low-cost FR-4 glass epoxy substrate with relative permittivity of 4.4 and overall dimension 21×25mm2 Comparison among antennas have been made and found that the proposed antenna exhibit better results in the fourth iteration in terms of bandwidth, impedance matching, number of frequency bands, and gain. The antenna is designed and simulated using HFSS and obtained good output response at 3.8, 5.6, 8.2 GHz which makes it suitable for 5G applications.
Adoption of Service-Oriented Architecture for Biophilic Service Provisioning Processes:Limitations and Possibilities
Authors: Daneshgar Farhad , Foroughi Rahim , Abedin Babak , Mehr Nava Tavakoli , Youhangifard Atefa 
Published: March 2023

Abstract
Many governments have recently shown strong interest in providing more green spaces for the benefit of their citizens. These benefits include recreational enjoyment, health and wellbeing, and biophilic assets/economy. This study analyses the nature of biophilic services as a pre-cursor for identifying high-level requirements of an ICT application for managing biophilic service-provisioning processes in biophilic cities. To achieve the above goal the study adopts a functionalist research paradigm that views biophilic services as part of the biophilic city the latter being a complex network of ecosystems that together promote and sustain solidarity, stability, and sustainability. With its macro-level orientation, the functionalist approach focuses on the needs of its citizens.