bluuebunny/crossref_metadata_2025 huggingface dataset:
ОБЕССОЛИВАНИЕ ПОДЗЕМНЫХ ВОД С ИСПОЛЬЗОВАНИЕМ МЕМБРАННЫХ ТЕХНОЛОГИЙ
Authors: Комарова  Лариса Федоровна Комарова  Лариса Федоровна , Сомин Владимир Александрович , Лапшин  Дмитрий Алексеевич Лапшин  Дмитрий Алексеевич
Published: April 2023

В работе рассматривается получение воды питьевого качества с использованием мембранных методов. Приводится анализ мембранных методов обессоливания подземных и поверхностных природных вод с использованием нанофильтрациии обратного осмоса. Рассматриваются пути оптимизации мембранного разделения водных растворов, в том числе с использованием нанофильтрации. Охарактеризованы мембраны и мембранные аппараты для указанных целей. Приводится опыт эксплуатации мембранных установок в различных природных условиях. Разработана технологическая схема водоподготовки с использованием нанофильтрационной установки для одного из населенных пунктов Кулундинского района Алтайского края. Схема предполагает предварительное обезжелезивание кислородом воздуха в накопительной аэрируемой емкости, фильтрование через фильтр с зернистой загрузкой для удаления гидроксида железа. В дальнейшем вода нагревается в кожухотрубчатом теплообменнике 8 до 25 ºС для снижения вязкости, от которой напрямую зависит проницаемость мембраны. После этого дозируется антискалант для предотвращения деструкции мембраны и подается на установку нанофильтрации. Нанофильтрация выбрана из-за невысокой концентрации примесей и соответственно малого осмотического давления исходного раствора, что позволяет снизить потребность в энергоресурсах. Часть концентрата циркулирует в мембранном модуле, позволяя увеличить выход пермеата, другая часть возвращается в недра. На заключительном этапе осуществляется обеззараживание воды ультрафиолетом, после чего она может подаваться в сеть для снабжения потребителей. Предложенная схема позволит очищать воду до нормативов СанПиН 1.2.3685-21 и обеспечить население питьевой водой с требуемым расходом 1500 м3/сут.
КОНТРОЛЬ ТОЛЩИНЫ ОБОЛОЧКИ ПОЛИЛАКТИДА НА ПОВЕРХНОСТЯХ ДИСПЕРСНЫХ ЧАСТИЦ ОКСИДА МЕДИ (I) МЕТОДОМ ТИТРОВАНИЯ
Authors: Данилаев Максим Петрович , Бобина Елена Андреевна , Дробышев Сергей Викторович , Карандашов Сергей Алексеевич , Куклин Владимир Александрович
Published: April 2023

Изменение некоторых механических характеристик дисперсно-армированных полимерных композиционных материалов с биоцидным эффектом возможно обеспечить путем контроля толщины полимерной оболочки на поверхностях дисперсных частиц наполнителя. В работе предложен косвенный контроль толщины оболочки полилактида на поверхностях дисперсных частиц оксида меди (I) с использованием метода титрования. Для калибровки полученных результатов титрования в работе определяли смещение максимума гистограммы распределения частиц (капсулированных относительно исходных частиц) по размерам по анализу микрофотографий. Предложена аппроксимация временной зависимости концентрации ионов меди в таком растворе экспоненциальной функцией вида. Нелинейность измерительной характеристики, связывающей постоянную времени аппроксимирующей экспоненциальной функции с толщиной оболочки связана с различным значением плотности оболочки полилактида разной толщины.
Pink salmon fishery in the Far-Eastern fishing basin in 2022: preliminary studies, forecast, interpretation of the fishing season results
Authors: Shevlyakov E. A. , Somov A. A. , Shevlyakov V. A. , Kanzeparova A. N. , Dederer N. A. , Melnikov I. V.
Published: April 2023

Results of marine trawl surveys for accounting of pink salmon in 2021 and 2022 and the main results of the salmon fishery in 2022 are presented. The main stages of forecasting of the pink salmon fishery in the Far Eastern basin are described. Differentiation of mixed aggregations of pink salmon is discussed. In 2022, specialists of Kamchatka Branch used for the first time a new method based on variability of SNP loci, along with the traditional methods (morphological express-method and genetic method based on mtDNA analysis). This method provided additional dividing the mixed aggregations of autumn pink salmon in the Sakhalin-Kuril area to the herds from southern Kuril Islands and from eastern Sakhalin. The fishery forecasts for pink salmon were adjusted several times during the fishing season. These adjustments had no a significant effect for the catch increasing in the Okhotsk Sea basin, but allowed to land 10,500 t additionally in the Bering Sea.
Analysis of the salmon fishing season of 2022
Authors: Marchenko S. L.
Published: April 2023

Pacific salmon fishery in the Far East of Russia in 2022 is analyzed. The reasons for discrepancy between forecasted and actual landing of pacific salmon are discussed. Measures to improve the management and scientific support of the pacific salmon fishery are proposed.
Housing conditions and biological indices for juvenile coho salmon of 2017–2021 generations grown at the Yansky salmon fish factory in the Magadan region
Authors: Ryabukha E. A. , Ignatov N. N.
Published: April 2023

Biological and morphophysiological parameters of juvenile coho salmon of artificial origin grown at the Yansky salmon hatchery in the Magadan region are analyzed. The breeding conditions and the larvae and juveniles development in 2017–2021 are compared.
Results of salmon fishery in the Far-Eastern fishery basin in 2022
Authors: Belyaev V. A. , Kanzeparova A. N.
Published: April 2023

Data on forecasted catch, actual catch and their ratio are presented for the main species of pacific salmon; the salmon fishery in 2022 is analyzed. The forecast of the salmon annual catch in the Far-Eastern fishery basin for 2022 should be recognized as generally satisfactory (reliability of 84.6 %).
Prospects for the pink salmon fishery in the Russian waters of the Bering and Okhotsk Seas in 2023 based on analysis of trawl surveys of the juveniles aboard RV TINRO and RV Professor Kaganovsky in autumn 2022
Authors: Somov A. A. , Shevlyakov E. A. , Starovoitov A. N. , Shevlyakov V. A. , Dederer N. A. , Melnikov I. V.
Published: April 2023

Modern technique of counting pink salmon juveniles in trawl surveys by two research vessels simultaneously makes it possible to cover the surveyed area in a short time that excludes repeated counts of actively migrating fish at adjacent transects. Such survey in the fall of 2022 was conducted jointly by RV TINRO and RV Professor Kaganovsky. The main aggregations of pink salmon in the offshore areas of the Bering and Okhotsk Seas were accounted that guaranteed reliability of the primary materials for prediction of the pink salmon return and catches in 2023. Two regional groups of pink salmon were separated in the mixed aggregation of juveniles in the Okhotsk Sea using the method of EM-clustering; the ratio of «northern» and «southern» complexes of their local stocks was determined as 55 : 45 %. The total number of pink salmon was assessed as 0.94 ∙ 109 ind. in the Bering Sea and 2.70 ∙ 109 ind. in the Okhotsk Sea. Expected return of pink salmon in 2023 was preliminary estimated as 200 ∙ 106 ind. for the Bering Sea and at least 270 ∙ 106 ind. for the Okhotsk Sea.
BF3-Catalyzed Intramolecular Fluorocarbamoylation of Alkynes via Halide Recycling
Authors: McKnight E. Ali , Arora Ramon , Pradhan Ekadashi , Fujisato Yuriko H. , Ajayi Ayonitemi J. , Lautens Mark , Zeng Tao , Le Christine M.
Published: April 2023

A BF3-catalyzed atom-economical fluorocarbamoylation reaction of alkyne-tethered carbamoyl fluorides is reported. The catalyst acts as both a fluoride source and Lewis acid activator, enabling the formal insertion of alkynes into strong C–F bonds through a halide recycling mechanism. The developed method provides access to 3-(fluoromethylene)oxindoles and γ-lactams with excellent stereoselectivity, including fluorinated derivatives of known protein kinase inhibitors. Experimental and computational studies support a stepwise mechanism for the fluorocarbamoylation reaction involving a turnover-limiting cyclization step, followed by internal fluoride transfer from a BF3-coordinated carbamoyl adduct. For methylene oxindoles, a thermodynamically driven Z-E isomerization is facilitated by a transition state with aromatic character. In contrast, this aromatic stabilization is not relevant for γ-lactams, resulting in a higher barrier for isomerization and the exclusive formation of the kinetic Z-isomer.
Pharmacophore-based ML model to predict ligand selectivity for E3 ligase binders
Authors: Karki Reagon , Gadiya Yojana , Gribbon Philip , Zaliani Andrea
Published: April 2023

E3 ligases are enzymes that play a critical role in ubiquitin-mediated protein degradation and are involved in various cellular processes. Pharmacophore analysis is a useful approach for predicting E3 ligase binding selectivity, which involves identifying key chemical features necessary for a ligand to interact with a specific protein target cavity. While pharmacophore analysis is not always sufficient to accurately predict ligand binding affinity, it can be a valuable tool for filtering and/or designing focused libraries for screening campaigns. In this study, we present a fast and inexpensive approach using a pharmacophore fingerprinting scheme known as ErG, which is used in a multiclass machine learning classification model. This model can assign the correct E3 ligase binder to its known E3 ligase and predict the probability of each molecule to bind to different E3 ligases. Practical applications of this approach are demonstrated on commercial libraries for rational design of E3 ligase binders.
Interpretable attribution assignment for octanol-water partition coefficient
Authors: Yokogawa Daisuke , Suda Kayo
Published: April 2023

With the increasing development of machine learning models, their credibility has become an important issue. In chemistry, attribution assignment is gaining relevance in designing molecules and debugging models. However, attention has been paid to which atoms are important in the prediction without considering whether the attribution is reasonable. In this study, we developed a graph neural network model, a high interpretable attribution model in chemistry, and modified the integrated gradients method. The credibility of our approach was confirmed by predicting the octanol--water partition coefficient (logP) and evaluating the three metrics --accuracy, consistency, and stability-- in the attribution assignment.
Cu(II)-Catalyzed Aerobic Synthesis of Sulfinamidines from Sulfenamides
Authors: Lu Xunbo , Huang Guoling , Ye Jianlin , Chen Yuetong , Tan Minxi
Published: April 2023

Inhere, the first instance of copper-catalyzed oxidative amination of sulfenamides for the synthesis of sulfinamidines was documented. Employing air as the terminal oxidant, a variety of secondary and primary amines can be effectively transformed into their target products. This reaction boasts excellent chemoselectivity, mild conditions, straightforward operation, and broad substrate compatibility, which has significant implications for the fields of pharmaceuticals and organic synthesis.
Controlling the self-assembly and material properties of β-sheet peptide hydrogels by modulating intermolecular interactions
Authors: Warren James , Culbert Matthew , Miles Danielle , Maude Steven , Wilcox Ruth , Beales Paul
Published: April 2023

Self-assembling peptides are a promising biomaterial with potential applications in medical de-vices and drug delivery. In the right combination of conditions, self-assembling peptides can form self-supporting hydrogels. Here, we describe how balancing attractive and repulsive intermo-lecular forces is critical for successful hydrogel formation. Electrostatic repulsion is tuned by al-tering the peptide’s net charge and intermolecular attractions are controlled through the degree of hydrogen bonding between specific amino acid residues. We find that an overall net peptide charge of +/-2 is optimal to facilitate the assembly of self-supporting hydrogels. If the net peptide charge is too low then dense aggregates form, while a high molecular charge inhibits the for-mation of larger structures. At constant charge, altering the terminal amino acids from glutamine to serine decreases the degree of hydrogen bonding within the assembling network. This tunes the viscoelastic properties of the gel, reducing the elastic modulus by two to three orders of magnitude. Finally, hydrogels could be formed from glutamine-rich, highly charged peptides by mixing the peptides in combinations with a resultant net charge of +/-2. These results illustrate how understanding and controlling self-assembly mechanisms through modulating intermolecular interactions can be exploited to derive a range of structures with tuneable properties.
Accelerating Reaction Network Explorations with Automated Reaction Template Extraction and Application
Authors: Unsleber Jan Patrick
Published: April 2023

Autonomously exploring chemical reaction networks with first-principles methods can generate vast data. Especially autonomous explorations without tight constraints risk getting trapped in regions of reaction networks that are not of interest. In many cases, these regions of the networks are only exited once fully searched. Consequently, the required human time for analysis and computer time for data generation can make these investigations unfeasible. Here, we show how simple reaction templates can facilitate the transfer of chemical knowledge from expert input or existing data into new explorations. This process significantly accelerates reaction network explorations and improves cost-effectiveness. We discuss the definition of the reaction templates and their generation based on molecular graphs. The resulting, simple filtering mechanism for autonomous reaction network investigations is exemplified with a polymerization reaction.
Accurate Electronic and Optical Properties of Organic Doublet Radicals Using Machine Learned Range-Separated Functionals
Authors: Ju Cheng-Wei , Shen Yili , French Ethan , Yi Jun , Bi Hongshan , Tian Aaron , Lin Zhou
Published: April 2023

Luminescent organic semiconducting doublet-spin radicals are unique and emergent optical materials because their fluorescent quantum yields (Φfl) are not compromised by spin-flipping intersystem crossing (ISC) into any dark high-spin states. The multiconguration nature of these radicals challenge their electronic structure calculations in the framework of single-reference density functional theory (DFT) and introduce room for method improvement. In the present study, we extend our earlier development of ML-ωPBE, a range-separated hybrid (RSH) exchange-correlation (XC) functional constructed using the stacked ensemble machine learning (SEML) algorithm, from closed-shell molecules to doublet-spin radicals. We assess its performance for an external test set of 64 radicals from five categories based on the original training set of 3,926 molecules. Interestingly, ML-ωPBE agrees with the first-principles OT-ωPBE functional regarding the molecule-dependent range-separation parameter (ω), with a small mean absolute error (MAE) of 0.0197 a0-1 but saves the computational cost by 2.46 orders of magnitude. This result demonstrates outstanding generalizability and transferability of ML-ωPBE among various organic semiconducting species. To further assess the predictive power of ML-ωPBE, we also compare its performance on absorption and fluorescence energies (Eabs and Efl) evaluated using time-dependent DFT (TDDFT), with nine conventional functionals. For most radicals, ML-ωPBE reproduces experimental measurements of Eabs and Efl with small MAEs of 0.222 and 0.121eV, only marginally different from OT-ωPBE. Our work illustrates a successful extension of the SEML framework from closed-shell molecules to open-shell radicals and willopen the venue for calculating optical properties using single-reference TDDFT.
Yolk-deprivedCaenorhabditis eleganssecure brood size at the expense of competitive fitness
Authors: Geens Ellen , Van de Walle Pieter , Caroti Francesca , Jelier Rob , Steuwe Christian , Schoofs Liliane , Temmerman Liesbet
Published: April 2023

Oviparous animals support reproduction via the incorporation of yolk as a nutrient source into the eggs. InCaenorhabditis elegans, however, yolk proteins seem dispensable for fecundity, despite constituting the vast majority of the embryonic protein pool and acting as carriers for nutrient-rich lipids. Here, we used yolk protein–deprivedC. elegansmutants to gain insight into the traits that may yet be influenced by yolk rationing. We show that massive yolk provisioning confers a temporal advantage during embryogenesis, while also increasing early juvenile body size and promoting competitive fitness. Opposite to species that reduce egg production under yolk deprivation, our results indicate thatC. elegansrelies on yolk as a fail-safe to secure offspring survival, rather than to maintain offspring numbers.
Applied Physics - For Engineers
Authors: Prabha Dr. E. Arockia Jeya Yasmi
Published: April 2023

Applied physicists use physics or conduct physics research to develop new technologies or solve engineering problems. What do manufacturing, aerospace and medical imaging have in common? Applied Physics! Our graduates are prepared to successfully compete for and perform in professional work across a broad range, including physics, engineering, education or related fields. The applied physics major also serves as an excellent pathway for students intending to pursue graduate study.
History of the formation of Kryvyi Rih landscape technical system
Authors: Koptieva T. S.
Published: April 2023

Purpose: to investigate the history of the formation of Kryvyi Rih landscape technical system, to highlight and justify three stages of development that were formed as a result of the mining industry in the territory of Kryvyi Rih landscape technical system. Methods: historical analysis, cartographic, method of anthropogenic landscape forecast. Results: During the study of the history of the formation of Kryvyi Rih landscape and technical system, three stages of the development of the system were identified and analyzed: artisanal development and development of natural resources (5th century BC – 17th century), where mostly the descriptions and development of individual geocomponents prevailed, that were of direct importance in people's lives. The first genesis of the formation of Kryvyi Rih landscape technical system began near the riverbeds of the Saksagan and Ingulets rivers, where iron ore deposits extend; research of natural resources for the purposes of their initial industrial development (18th - first half of the 20th century), which made it possible to form an industrial base and start intensive extraction of minerals; (the second half of the 20th century – the beginning of the 21st century) – the development of one of the largest landscape systems not only in Ukraine, but also in the world. In just 150 years, a new, complex and dynamic landscape structure was formed within the borders of Kryvorizhzhia, with a clear advantage of industrial, mostly mining landscapes, which, together with residential landscapes, form the modern landscape background of Kryvorizhzhia. Schemes and maps have been developed that reflect the development of Kryvyi Rih landscape and technical system. Conclusions: Kryvyi Rih landscape technical system began its formation in the 4th century BC, but the most active and dynamic development of the mining industry took place only 150 years ago. In such a short period of time, a new, complex and dynamic landscape structure was formed on the territory of Kryvorizhzhia, with a clear advantage of industrial, mostly mining landscapes, which together with residential landscapes form the modern landscape background of Kryvyi Rih landscape technical system.
Carbon stock in the litter on the Skolivski Beskydy territory (Ukrainian Carpathians)
Authors: Chernyavska Kh. I. , Shpakivska I. M.
Published: April 2023

Purpose. Investigate the carbon stock in the forest litter in the Skolivski Beskydy (Ukrainian Carpathians), taking into account the mountainous features of the region, and model the regional regression equation for calculating the carbon stock in the litter based on the obtained data.

Methods. Field studies of carbon stock in forest litter by the technique of Skorodumov. Determination of mineral parts and bedding was determined by dry ashing. Mathematical modeling.

Results. The work was carried out on the territory of the Skolivski Beskydy (Ukrainian Carpathians). The selected area provides an opportunity to study the impact of abiotic factors on the formation of carbon stocks in forest litter, as well as to compare these reserves in different types of forest use. As a result of route research, the calculation of the carbon stock in the forest litter on the laid transects of the Skole Beskids was calculated. Carbon reserves were calculated on the basis of eight transects in the Skolivski Beskydy. From the obtained results, we found the dependence of carbon stock in forest litter on the species composition of the stand, exposure, and slope steepness. Based on the results obtained, it was possible to form a regional regression equation for converting data from the state forest cadastre to calculate carbon stocks in the litter, considering the altitude and slope steepness.

Conclusions. The correlation between carbon stock in forest litter and abiotic factors (stand composition, exposure, slope steepness) was revealed, which allowed creating of a regional regression equation for the conversion of state forest cadastre data for carbon stock calculations in forest litter.
Visualization Analysis of the Results of Continuum-Atomistic Modeling of a Coulomb Explosion in Metals Under the Influence of Ultrashort (fs, ps) Laser Action
Authors: Mazhukin V.I. , Shapranov A.V. , Demin M.M. , Koroleva O.N. , Mazhukin A.V.
Published: April 2023

A continuum-atomistic model that describes nonequilibrium thermal, hydrodynamic, and electronic processes in metals that occur under the action of ultrashort (fs, ps) laser radiation has been developed. A detailed study of two mechanisms of ultrashort laser ablation of Cu was carried out: fast - Coulomb, determined by Coulomb forces, and slow - thermal, realized in the unloading wave after the end of the laser pulse. Modeling showed that the excess nonequilibrium pressure of collectivized electrons plays a leading role in the formation of a strong electric field at the metal-vacuum interface. This effect can be taken as the basis for the Coulomb explosion in metals. The main feature of the work is the widespread use of modern visualization tools for processing and presenting simulation results.
On Berezin radius inequalities via Cauchy-Schwarz type inequalities
Authors: Gurdal Verda , Basaran Hamdullah
Published: April 2023

The Berezin transform $\widetilde{A}$ and the Berezin radius of an operator $A$ on the reproducing kernel Hilbert space over some set $\Omega$ with the reproducing kernel $k_{\lambda}$ are defined, respectively, by \[ \widetilde{A}(\lambda)=\left\langle {A}\widehat{{k}}_{\lambda},\widehat{{k}% }_{\lambda}\right\rangle ,\ \lambda\in\Omega\text{ and }\mathrm{ber}% (A):=\sup_{\lambda\in\Omega}\left\vert \widetilde{A}{(\lambda)}\right\vert . \] We study some new inequalities by using this bounded function $\widetilde{A}, $ involving refinements of some Berezin radius inequalities for operators acting on the reproducing kernel Hilbert space.
On $\mathcal I$ and $\mathcal I^*$-equal convergence in linear 2-normed spaces
Authors: Banerjee Amar Kumar , Nesar Hossain
Published: April 2023

In this paper we study the notion of $\mathcal{I}$ and $\mathcal{I^*}$-equal convergence in linear 2-normed spaces and some of their properties. We also establish the relationship between them.
On nearly recurrent Riemannian manifolds
Authors: B. PRASAD  , R.P.S. YADAV
Published: April 2023

The object of the present paper is to introduce a type of recurrent Riemannian manifold called nearly recurrent Riemannian manifold . The existence of nearly recurrent Riemannian manifold have been proved by non trivial example.
Initial coefficient estimates for subclasses of bi-univalent functions
Authors: Shrigan Mallikarjun , P. N. Kamble
Published: April 2023

The purpose of the present paper is to introduce new subclasses of the function class $\Sigma$ of normalized analytic and bi-univalent functions in the open disk $\mathbb{U}$. We obtain estimates on the first two Taylor-Maclaurin coefficients $|a_{2}|$ and $|a_{3}|$ for functions of these subclasses.
Double domination number of the shadow (2,3)-distance graphs
Authors: Aytaç Aysun , Mutlu Ayşen
Published: April 2023

Let G  (V,E) be a graph with the vertex set V (G) and S be a subset of V(G). If every vertex of V is dominated by S at least twice, then the set S is called a double domination set of the graph. The number of elements of the double domination set with the smallest cardinality is called double domination number and denoted by 2 (G)  notation. In this paper, we discussed the double domination parameter on some types of shadow distance graphs such as cycle, path, star, complete bipartite and wheel graphs.
Effect of Cathode Distance, Anode and Electroplating Time on Aluminum Alloy Corrosion Rate
Authors: Putra Agus Dwi , Tsamroh Dewi Izzatus , Pradani Yayi Febdia , Meditama Ratna Fajarwati , Muflih Ahmad
Published: April 2023

Aluminum foil is used more often than actual aluminum in everyday life because aluminum is actually quite unstable and is not suitable for securing heavy containing objects. For car wheels, aluminum is mixed with manganese and then hardened to withstand the load. Using aluminum alloys requires an electroplating process to increase corrosion resistance, decorative value and friction resistance. The purpose of this study was to determine the properties of anodized cathode aluminum alloy and the required coating time. In this study, a quantitative experiment used 20 samples. The results showed that there were defects in the aluminum alloy lattice, but not too significant. Different corrosion rate values were shown using electrolysis periods of 30 minutes and 60 minutes combined with anode-cathode distances of 5 cm, 10 cm and 15 cm. The group with 30 minutes of coating time and 5 cm anode-cathode distance had the highest corrosion rate (0.853 mm/year), while the group with 30 minutes of coating time and 10 cm anode-cathode distance had the lowest corrosion rate (0.610). The group with 60 minutes of coating time and 10 cm distance between the anode and cathode had the highest corrosion rate of 1,564 mm/year, while the group with 60 minutes of coating time and 15 cm distance had the lowest corrosion rate. The anode-cathode distance partially affects the corrosion rate of aluminum alloy electroplating. The smaller the distance between the anode and cathode, the higher the corrosion rate of the aluminum alloy. The longer the coating lasts, the higher the corrosive rate of the Al alloy.
Morphology Study of the Corrosion Rate on Weld Joint of Double Side Friction Stir Welding Aluminum Alloy AA6061
Authors: Crisdion Simonne Andrean , Puspitasari Poppy , Permanasari Avita Ayu , Priyasudana Danang , Pramono Diki Dwi , Akhtar Majid Niaz
Published: April 2023

DSFSW welding uses the rotating of a tool in the workpiece to create heat owing to friction between workpiece and tool to be connected. Corrosion is influenced by the presence of high heat owing to friction and a non-uniform cooling rate. The heat transforms the metal in the Heat Affected Zone (HAZ) and Weld Metal (WM) region, which can result in flaws such porosity, kissing bond, fractures, voids (from welding penetration), and flash as well as changes to the microstructure. Changes in the microstructure of welded joints can affect the resistance of welded joints to corrosion. The purpose of this study is to experimentally analyze the main causes of failure of AA6061 DSFSW joints based on welding temperature, weld defects, microstructure, corrosion rate and morphology of the corroded surface. Temperature testing using thermocouple to analyze the temperature, welding joint defects using DSLR camera and radiography test, microstructure using optical microscope, corrosion rate using AUTOLAB PGSTAT and morphology of corroded surface using SEM. The temperature analysis results show that the advancing side has a higher temperature than the retreating side, due to friction between the tool and base metal accompanied by the opposite welding direction. Visual inspection shows that all specimens and welding positions produce flash that is quite rough on the top (1G) and bottom (4G) surfaces and radiographic test results show incomplete fusion in 4 specimens. Microstructure shows a change in shape and size resulting in recrystallization in the form of fine grains. The highest corrosion rate is found in specimen B 1G welding position of 0.63856mm/year and the lowest corrosion rate in specimen A of 0.058567mm/year. SEM test results show the type of corrosion that occurs in DSFSW welding joints is pitting corrosion.
Identification of Thermophysical and Rheological Properties of SAE 5w-30 with Addition of Hexagonal Boron Nitride
Authors: Asmoro Reyhandi Katon , Puspitasari Poppy , Permanasari Avita Ayu , Abdullah Muhammad Ilman Hakimi Chua
Published: April 2023

This research uses SAE 5W-30 lubricant base material with the addition of Hexagonal Boron Nitride (hBN) nanoparticle additives. This study aims to analyze the thermophysical and rheological properties of lubricants with the addition of nanoparticles. The method in this study uses a two-step method where nanoparticles are first prepared separately, then added with nanoparticles with varying volume fractions of 0.05%, 0.10%, 0.15% into the base fluid as a processing step. The next step is the stirring process using a magnetic stirrer, and ultrasonic homogenizer process.  Furthermore, the nanolubricant was tested for thermophysical properties including viscosity, density, thermal conductivity, and sedimentation.
Crack Simulation on Diesel Engine Crankshaft using Finite Element Method
Authors: Kurniawan Pradhana , Gemilang Yusuf Prasetyo
Published: April 2023

Crankshaft is a machine component that has a high stress value and failure usually occurs due to fatigue. Crankshaft in diesel engines found in certain vehicles that have performance specifications of 140 cv (cheveaux vapeur) at engine speed of 4000 rpm and displacement of 1963m3. Crankshaft failed on the crankpin and main bearing cap. The failure occurred after this vehicle traveled 180,000 km in use and through repairs during 8 years of use. Failure of the crankshaft is the root cause of internal damage to the combustion engine. Based on a simulation on a 4-cylinder diesel engine crankshaft using the finite element method using ANSYS Workbench 18.1 software, the equivalent (von mises) stress results are obtained with a maximum stress value of 445.72 MPa. Stress concentrations present in the crankshaft will result in the initiation of cracks which can propagate and result in fracture of the crankshaft. The stress concentration lies in the fillet web of the crankshaft where this part is very susceptible to cracking and fracture if the fillet design is not suitable or if an error occurs when the crankshaft is in the initial machining process. Stress concentrations at a certain point can also be caused by errors during the fabrication process.
Psychoedu-Fitrah to Prevent Deviations of Santri's Sexual Orientation
Authors: Muniroh Siti Mumun
Published: April 2023

This study aims to develop, test and analyze the effectiveness of spiritual psychological models to prevent students' sexual orientation deviations in Islamic boarding schools. The method used in this study is the ADDIE research and development model, with a mechanism for the stages of model development including Analysis, Design, Development or Production, Implementation or Delivery, and Evaluations. This study succeeded in revealing and concluding that there are several steps in carrying out psyched-nature procedures to prevent sexual behavior deviations, namely understanding adolescent sexual nature, training adolescent sexual natural skills, and training the actualization of adolescent sexual nature. Based on the assistance among students, it shows that psychoedu-fitrah has proven effective and can significantly prevent sexual orientation deviations for young students. Evidence of effectiveness is shown by a significance value reaching 0.000 (<0.05), with a t-value of -8,718.
The Indonesian Government’s Incapable Reliance on Private Islamic School Owners in Upholding The Nation’s Principles
Authors: Kholis Nur
Published: April 2023

This article examines the role of private Islamic schools in Indonesia in providing education and fostering religious values among their students. It argues that the Indonesian government has failed to ensure equal access to quality education for all citizens and to instill a strong sense of religious identity in them. The objective of the article is to highlight the strategies employed by private Islamic schools in building students' religious character, which is seen as an essential component of their education. The article adopts a qualitative method with a multiple-case study approach on three private Islamic schools in Pekalongan, a city known for its Islamic culture and tradition. The article identifies three main strategies that the school foundation management uses to nurture students' religious character: daily supervision, monthly guidance session, and warm personal communication. The article concludes with a recommendation that the government should recognize and support the contribution of private Islamic schools in developing their own curriculum that reflects their religious vision and values.
Islamization of Science from a Historical-Philosophical Perspective
Authors: Baharuddin Mochammad Achwan
Published: April 2023

This paper discusses the idea of science which tends to get a negative response and does not develop. In fact, the main goal is to provide a new awareness in obtaining modern knowledge in accordance with the needs of Muslims. The main focus of writing is how the nature or purpose of the Islamization of Science. The main focus is discussed with a descriptive qualitative method through a historical-philosophical approach based on literature data.

This paper shows that the essence of the idea of the Islamization of science is a movement for the renewal of science which bases itself on the fact that modern science is developing contrary to religion, so there is a need for a cleansing liberation movement. This idea has major implications, namely right and wrong between science and religion. In fact, the standard of truth is different from one another so that it forces the truth of one (religion) to justify knowledge or vice versa creates an attitude of human disharmony. Therefore, there is a need for a new awareness that respects the differences between the two in obtaining new knowledge in order to build a more advanced human civilization.
Data-informed Teacher Training in Islamic Schools to Impact Effective Professional Development
Authors: Kholis Nur
Published: April 2023

This article challenges the assumption that teacher training programs need not to be based on data-informed decision making. It argues that such an approach neglects the contextual factors and the agency of the teachers in shaping their own professional development. Using a qualitative research method, the article presents a multiple case study of three islamic elementary schools in Pekalongan, Indonesia that have implemented data-informed teacher training programs. The findings reveal that teacher forums play a crucial role in determining the content and format of the training programs, that islamic teachers face various challenges in adapting to the digital era, and that the foundation management has a significant influence on the quality and sustainability of the training programs. The article concludes that teacher training programs should be more responsive to the needs and preferences of the teachers, rather than being imposed by mere trends and trial and error.
The Role of Technology Acceptance Model (TAM) in Developing Turkish Pre-Service EFL Teachers’ Technology Adoption
Authors: ÖLMEZ Rabia , KAVAKLI ULUTAŞ Nurdan
Published: April 2023

As 21st century has witnessed drastic changes in educational technology, the education of pre-service teachers has gained more significance. Educators are then sought to be digitally literate who are also accepting new technologies to utilize web tools competently. That said, this current quantitative driven-mix method research scrutinizes the role of the Technology Acceptance Model (TAM) in enhancing the pre-service English as a Foreign Language (EFL) teachers’ technology adoption in this changing educational landscape. Accordingly, an online questionnaire together with structured interview are used to gather data from 94 pre-service EFL teachers at a public university in Türkiye due to the restrictions of the Covid-19 pandemic during 2020-21 academic year. Quantitative data are analyzed through SPSS 27.0 to detect construct-dependent and -independent frequency levels whereas qualitative data are analyzed in lieu of grounded theory by means of thematic analysis. As a result of the quantitative data analysis, it is revealed that the Turkish pre-service EFL teachers’ levels of technology acceptance are moderately high, albeit there is no significant difference regarding age, gender, and personal computer ownership. On the other hand, qualitative data results provide a deeper insight into participants’ perceptions on related concepts. The results are mainly noted as the growing need for modifications in teacher education programs in order to familiarize more with technology and web tools as well as to improve their future technology-integrated language teaching practices.
The abiotic environment of Casa de Campo Lake (Madrid, Spain)
Authors: Álvarez Cobelas Miguel
Published: April 2023

Arising from the unstoppable growth of cities worldwide, more concern on environmental quality has recently been devoted to urban and periurban lakes. Monthly physico-chemical variables of the Casa de Campo Lake, an artificial basin in Western Madrid city, are reported here for an annual cycle following its reflooding in 2019 and comparing them with those of other similar environments. Nutrient features of the main watercourse draining to the Lake have also been studied. The Lake is a polymictic, low-salinity and eutrophic site and its nutrient dynamics shows a seasonal pattern for nitrogen, but subtle seasonality for organic carbon and phosphorus. Phytoplankton chlorophyll-a, however, does not follow the same patterns because algal recolonization has taken place slowly in the first months, not enabling the summer peak to occur. The Lake is mostly phosphorus-limited. Organic phosphorus, nitrogen and phosphorus concentrations are roughly similar to those of other urban lakes. Nutrient enrichment aside, arising from both the unlocalized setting of wastewater point sources and the catchment and surrounding runoff, the Lake does not experience pollution by heavy metals and organics. The Lake environmental quality could be improved if those point sources were identified and abated. Dado el imparable crecimiento de la población en las ciudades de todo el mundo, se está prestando cada vez más atención a los lagos de entornos urbanos y periurbanos. En este artículo se describe mensualmente la físico-química del Lago de la Casa de Campo durante un ciclo anual tras su inundación en 2019, comparándola con datos antiguos y con otros lagos de la misma índole existentes en otras zonas del Globo. Paralelamente, se han analizado también las aguas del arroyo Meaques, la principal vía de aporte hídrico al Lago. Este es polimíctico, de baja salinidad, eutrófico y su dinámica nutritiva muestra pautas claramente estacionales para el nitrógeno y menos patentes para el carbono orgánico o el fósforo. La clorofila fitoplanctónica, sin embargo, no siguió dichas pautas porque la recolonización de las algas ocurrió lentamente durante los primeros meses, sin dar tiempo a que tuviera lugar el máximo estival de ese año. La limitación del crecimiento vegetal en este ecosistema se debe fundamentalmente al fósforo. Las concentraciones de carbono orgánico, nitrógeno y fósforo son similares a las de otros lagos urbanos del mundo. Aparte del enriquecimiento nutritivo, derivado fundamentalmente de la escorrentía en su cuenca hidrográfica y en el entorno de su cubeta y de aportes de aguas residuales no ubicados, el Lago carece de contaminación por metales pesados o productos de síntesis orgánica. Para mejorar la calidad ambiental del mismo sería conveniente identificar y eliminar las fuentes puntuales de contaminación.
"Control of trips (Thysanoptera, Thripidae) with biorational insecticides and baits for mexican lime at Michoacan"
Authors: Miranda-Salcedo Mario A. , Perales-Segovia Catarino , Miranda-Ramírez José M. , Castañeda-Cabrera Cecilio , González-Gaona Ernesto
Published: April 2023

"Frankliniella occidentalis Pergande 1895 and F. insularis (Thysanoptera, Thripidae) attack Mexican lime at Apatzingan Valley, Michoacán, Mexico. The trips were presents all year, however the number of adults increased of november to june y, and fall of july to october, during period rain and causing high damage to plant when the population of pest increasing of populations. With of objective to evaluate different products in Mexican lime for the control over trips and the impact of natural enemies. We effect two The most important natural enemies of trips were: Chrysoperla rufilabris Burmeister, 1839, Cycloneda sanguínea (L., 1763), Hippodamia convergens Guerin-Meneville, 1842, Olla v-nigrum (Mulsant, 1866) and Zelus renardii (Kolenati, 1857), Sthetorus sp, Leptotrips sp., Orius sp., differents species of spinders and phytosaids. The enemies most important were the crisopids C. rufilabris y C. cincta The best products for the control of trips were El Spirotetramat®, el Pyrofluquinazon, Tolfenpyrad and the mixture Biocrack® plus Fractal®. The protection was 13 to 27 days post aplicación the acord to season yers. Spirotetramat with BioBait were the best treat post sixe day post aplications. The period most suceptibilty was april-may (80% damage fruist mexican lemon)." "Frankliniella occidentalis Pergande 1895 y F. insularis (Thysanoptera, Thripidae) atacan al limón mexicano en el valle de Apatzingán, Michoacán México. Los trips están presentes durante todo el año, con altas poblaciones de noviembre a junio, decrecen de julio a octubre durante el periodo de lluvias y causan un daño económico considerable al cultivo cuando se incrementa su población. Con el objetivo de evaluar productos en lima mexicana para el control de trips y el impacto en los insectos benéficos. Se realizaron dos pruebas de efectividad biológica en diferentes épocas del año en donde se evaluaron 12 productos biorracionales y tres atrayentes alimenticios sobre trips y su impacto en los enemigos naturales. Los principales enemigos naturales encontrados fueron: Chrysoperla rufilabris Burmeister, 1839, Cycloneda sanguínea (L., 1763), Hippodamia convergens Guerin-Meneville, 1842, Olla v-nigrum (Mulsant, 1866) y Zelus renardii (Kolenati, 1857), Sthetorus sp, Leptotrips sp. Orius sp., diferentes especies de arañas y fitoseidos. Los depredadores más abundantes fueron las crisopas C. rufilabris y C. cincta. El Spirotetramat®, el Pyrofluquinazón, Tolfenpirad y la mezcla Biocrack® más Fractal®, fueron losmejores productos para el control de trips. El periodo residual varió de los 13 a 27 días después de aplicado el producto según la época del año. La mezcla Spirotetramat® más BioBait® tuvo un efecto en el control después de seis días. La floración más susceptible al daño de trips fue la de abril-mayo (80% de frutos dañados)."
Yersel referans verilerinin doğruluğunun çok zamanlı Sentinel-2 uydu görüntüleri ile araştırılması: Arpa ve Buğday örneği
Authors: YAŞAR Oğuzhan , YAĞCI Ali Levent
Published: April 2023

Ülkemizde uzaktan algılama görüntüleri ve yöntemleri ile tarım ürün deseni belirlemek amaçlı birçok çalışmalar yapılmaktadır. Bu çalışmalarda sınıflandırma algoritmasının eğitilmesi ve sonuçlarının doğrulanması için çeşitli kaynaklardan oluşturulan yersel referans veriler kullanılmaktadır. Ancak, bazı çalışmalarda bu referans veri setlerinde hatalar bulunduğu ortaya konmuştur. Bu çalışmada, Yozgat ili Merkez ilçesi için bir firmadan alınan yersel referans verilerinin güvenirliği Sentinel-2A ve Sentinel-2B uydu görüntüleri kullanılarak araştırılmıştır. Geliştirilen yöntemde, uydu görüntülerinden oluşturan parsel zaman serileri her ürünün ortalama karakteristik Normalize Edilmiş Bitki İndeksi (NDVI) eğrisi ile iteratif olarak karşılaştırılmaktadır. Daha sonra, korelasyon ve ortalama en kısa mesafe değerleri kullanılarak hatalı etiketlenen tarım ürünleri bulunmaktadır. Yöntem, arpa ve buğday tarım ürünleri ile test edilmiştir ve tüm hatalı etiketlenen parseller başarılı bir şekilde bulunmuştur. Yöntem, kullanıcıya herhangi bir eğitim verisi seçimi yaptırmadan otomatik olarak karar vermektedir. Bundan dolayı, veri indirme ve parsel sınırlarını düzeltilmesi dışındaki tüm işlemlerin otomasyonu Python programlama dili ve çeşitli açık kaynaklı kütüphaneler ile sağlanmıştır.
En az maliyetli yol analizine dayalı arkeolojik tahmin haritalarının kullanılabilirliğinin incelenmesi: Sivas merkez ilçe örneği
Authors: ZENGİN KOŞAN Olcay , KUŞÇU ŞİMŞEK Çağdaş
Published: April 2023

Bu çalışmada, Sivas ili merkez ilçesi için en az maliyetli yol analizi (LCPA) kullanılarak bir arkeolojik tahmin modeli oluşturulmuştur. Çalışma alanı sınırları içerisinde MÖ 2. Binyıl'a tarihlenen 23 ve Demir Çağı'na tarihlenen 30 arkeolojik alan girdi noktası olarak kullanılmıştır. MÖ 2. binyıl için daha sonraki dönemlerden 18 yerleşim yeri ve Demir Çağı için demir çağı sonrası dönemlerden 12 yerleşim ise kontrol noktası olarak seçilmiştir. Çalışma alanının topoğrafyası ve giriş noktası olarak seçilen farklı arkeolojik alanlar (höyük, yamaç yerleşimi, tepe yerleşimi, tümülüs) kullanılarak bu alanlar arasında En Az Maliyetli Yol (LCP) ağı oluşturulmuştur. Kontrol noktaları ile yol ağı arasındaki ilişki her iki dönem için ayrı ayrı incelenmiş ve kontrol noktalarının %90'ından fazlasının 1 km içinde olduğu tespit edilmiştir. Bu kontrol noktalarının %80'den fazlası ilk 500 m’deki, %20'den fazlası ise 50 m’deki alanda yer almaktadır. Elde edilen sonuçlar, LCPA kullanılarak etkili bir tahmine dayalı modelin oluşturulabileceğini göstermektedir.
“An Icelandic Driver”: J. Magnús Bjarnason’s Story as a History of Immigrant Hierarchy and Antisemitism in Nineteenth-Century Halifax: An Introduction
Authors: Lalonde Jay L.
Published: April 2023

This introduction to “An Icelandic Driver” by Jóhann Magnús Bjarnason aims to provide a critical context for reading the text. The story portrays Halifax as a city of immigrants and depicts the otherwise underdiscussed histories of urban Icelandic immigration. It also relies, however, on the structures of racialized immigrant hierarchy, antisemitism, and Black erasure. This introduction provides background information about Bjarnason’s life and work, and critically analyzes the ways in which his text thematizes national identity and community. It also aims to rectify the stereotypical depictions of Jewish characters in the story, as well as the complete erasure of Black Haligonians, by providing accounts of some of the many Jewish and Black histories of Halifax and Nova Scotia that Bjarnason chooses to omit.