bluuebunny/crossref_metadata_2025 huggingface dataset:
Efektivitas Penggunaan Media Pembelajaran Interaktif Nearpod pada Mata Pelajaran Bahasa Indonesia
Authors: Oktaviani Ramanda , Nurhamidah Didah
Published: July 2023

Penelitian ini bertujuan untuk mengetahui seberapa efektif penggunaan media Nearpod berdasarkan motivasi dan hasil belajar siswa kelas 11 Kecantikan Sekolah Menengah Kejuruan Taruna Terpadu 2 Metode penelitian yang digunakan ialah metode deskriptif kualitatif dengan didukung data kuantitatif. Data diperoleh dalam penelitian ini berdasarkan hasil skor yang terdapat dalam aplikasi Nearpod dan hasil test manual (pretest – posttest) serta kuesioner (angket) tertulis yang dilakukan secara online. Subjek penelitian iniadalah siswa kelas 11 Kecantikan Sekolah Menengah Kejuruan Taruna Terpadu 2 Bogor yang berjumlah 14 orang. Berdasarkan hasil dan pembahasan dalam penelitian ini, dalam penggunaan media Nearpod motivasi dan hasil belajar siswa mengalami peningkatan, jadi dapat disimpulkan penggunaan media pembelajaran Nearpod efektif digunakan pada mata pelajaran Bahasa Indonesia kelas 11 Kecantikan Sekolah Menengah Kejuruan Taruna Terpadu 2 Bogor.
Peningkatan Kemampuan Kolaborasi dan Literasi Digital Melalui Penugasan E-Mind Mapping Berbantuan Google Slide
Authors: Baharudin Baharudin
Published: July 2023

Penelitian ini adalah Penelitian Tindakan Kelas yang bertujuan untuk meningkatkan kemampuan kolaborasi dan literasi digital siswa melalui penugasan e-mind mapping berbantuan Google Slide pada siswa kelas IX Sekolah Menengah Pertama mata pelajaran Ilmu Pengetahuan Sosial. Peningkatan kemampuan kolaborasi dan literasi digital sangat penting untuk mendukung pembelajaran abad 21. Pengumpulan data menggunakan observasi dan angket kepada subyek sebanyak 28 siswa kelas IX-A Sekolah Menengah Pertama Negeri 11 Kota Bima. Observer mengamati kemampuan kolaborasi siswa, sedangkan siswa mengisi angket untuk mengetahui tingkat kemampuan literasi digital siswa. Analisis data dilakukan menggunakan analisis data kuantiitatif berupa hasil rerata dari masing-masing variabel. Hasil penelitian menunjukkan kenaikan skor kemampuan kolaborasi dari skor 79 pada siklus 1 menjadi 83 pada siklus 2, namun demikian kategori skor tersebut tetap berada pada kategori “Tinggi”. Sedangkan kemampuan literasi digital siswa juga meningkat dari skor 66 pada siklus 1 menjadi 72 pada siklus 2 diikuti dengan perubahan indikator dari “Cukup” menjadi “Baik”.
Program Literasi Berbasis Permainan Siaga Petra untuk Menumbuhkan Sikap Empati Siswa
Authors: Anggraini Ayudiah
Published: July 2023

Penelitian ini  bertujuan  menumbuhkan sikap empati siswa kelas 1b Sekolah Dasar Negeri 2 Rejang Lebong melalui program literasi berbasis permainan Siaga Petra. Metode penelitian yang digunakan adalah Penelitian Tindakan Kelas yang dilaksanakan dalam 3 siklus. Subjekpenelitian adalah siswa kelas 1b Sekolah Dasar Negeri 2 Rejang Lebong, sejumlah 29 orang terdiri dari 15 laki-laki dan 14 perempuan.Instrumen penelitian ini adalah jurnal pengamatan sikap empati. Data jurnal pengamatan sikap empati dianalisis secara deskriptif daribanyaknya kemunculan indikator. Hasil penelitian pada siklus1 terdapat 6 indikator sikap empati yang muncul. Siklus 2 terdapat 9 indikator sikap empati yang muncul. Siklus 3 terdapat 9 indikator sikap empati yang muncul. Berdasarkan hasil penelitian tersebut dapat diambil kesimpulan bahwa penerapan program literasi berbasis permainan Siaga Petra dapat menumbuhkan sikap empati siswa.
Analisis Kemampuan Berpikir Kreatif Siswa Melalui Implementasi Pembelajaran Proyek Pembuatan Bel Listrik Sederhana
Authors: Ariani Rosyidah
Published: July 2023

Pembelajaran daring mata pelajaran Ilmu Pengetahuan Alam di massa pandemi harus tetap memperhatikan kemampuan intelaktual yaitu kemampuan berpikir tingkat tinggi agar tujuan pendidikan nasional dapat tercapai salah satunya adalah berpikir kreatif. Dalam best practice ini, hasil inovasi pembelajaran menggunakan pembelajaran proyek pada pembuatan bel listrik sederhana berbantuan canva oleh siswa SMP YPM 3 Taman dogunakan sebagai bahan analisis kemampuan berpikir kreatif siswa. Penelitian ini melibatkan 33 siswa kelas IX-C Sekolah Menengah Pertama YPM 3 Taman. Metode yang digunakan yaitu metode deskriptif kuantitatif. Data penelitian diperoleh dari observasi hasil laporan proyek dari siswa kelas IX-C. Berdasarkan hasil observasi diperoleh data bahwa kemampuan berpikir orisinal sebesar 62,12% berada pada kategori baik; kemampuan berpikir luwes sebesar 78,79% termasuk kategori baik; kemampuan berpikir lancar sebesar 56,82% termasuk dalam kategori cukup; dan kemampuan berpikir rinci sebesar 59,85% termasuk dalam kategori cukup. Dapat disimpilkan bahwa kemampuan berpikir kreatif siswa kelas IX-C dalam pembelajaran proyek pembuatan bel listrik berbantuan Canva sebesar 64,39% termasuk dalam kategori baik.
On Weighted Vertex and Edge Mostar Index for Trees and Cacti with Fixed Parameter
Authors: Asmat Farwa , Asmat Humaira , Askar Sameh , Ahmad Hijaz , Khan Muhammad Ijaz
Published: July 2023

It was introduced by Doˇsli ́c and Ivica et al. (Journal of Mathematical chemistry, 56(10) (2018): 2995–3013), as an innovative graph-theoretic topological identifier, the Mostar index is significant in simulating compounds’ thermodynamic properties in simulations, which is defined as sum of absolute values of the differences among nu(e|Ω) and nv(e|Ω) over all lines e = uv ∈ Ω, where nu(e|Ω) (resp. nv(e|Ω)) is the collection of vertices of Ω closer to vertex u (resp. v) than to vertex v (resp. u). Let C(n, k) be the set of all n-vertex cacti graphs with exactly k cycles and T(n, d) be the set of all n-vertex tree graphs with diameter d. It is said that a cacti is a connected graph with blocks that comprise of either cycles or edges. Beginning with the weighted Mostar index of graphs, we developed certain transformations that either increase or decrease index. To advance this analysis, we determine the extreme graphs where the maximum and minimum values of the weighted edge Mostar index are accomplished. Moreover, we compute the maximum weighted vertex Mostar invariant for trees with order n and fixed diameter d.
Upper and Lower $s\beta(\star)$-continuous Multifunctions
Authors: Boonpok Chawalit , Pue-on Prapart
Published: July 2023

Our main purpose is to introduce the concepts of upper and lower $s\beta(\star)$-continuous multifunctions. In particular, some characterizations of upper and lower $s\beta(\star)$-continuous multifunctions are investigated. Moreover, the relationships between $s\beta(\star)$-continuous multifunctions and almost $s\beta(\star)$-continuous multifunctions are discussed.
Localization in the Category $COMP(G_{r}(A-Mod))$ of Complex associated to the Category $G_{r}(A-Mod)$ of Graded left $A-$modules over a Graded Ring
Authors: Ould Chbih Ahmed , Ben Maaouia Mohamed Ben Faraj , Sanghare Mamadou
Published: July 2023

The main results of this paper are : \\If $A=\displaystyle{\bigoplus_{n\in\mathbb{Z}}}A_{n}$ is a graded duo-ring, $S_{H}$ is a partformed of regulars homogeneous elements of $A$, $\overline{S}_{H}$ is the homogeneous multiplicativelyclosed subset of $A$generated by $S_{H}$, then:

\begin{enumerate}\item The relation $C_{H}(-) :G_{r}(\overline{S}_{H}^{-1}A-Mod)\longrightarrow COMP(G_{r}(\overline{S}_{H}^{-1}A-Mod))$ which that for all graded left$\overline{S}_{H}^{-1}A-$module $\overline{S}_{H}^{-1}M$ of $G_{r}(\overline{S}_{H}^{-1}A-Mod)$we correspond the associate complex sequence $(\overline{S}_{H}^{-1}M)_{*}$ to a graded $\overline{S}_{H}^{-1}A-$module$\overline{S}_{H}^{-1}M$ and for all graded morphism of graded left $\overline{S}_{H}^{-1}A-$modules$\overline{S}_{H}^{-1}f : \overline{S}_{H}^{-1}M\longrightarrow \overline{S}_{H}^{-1}N$ of degree $k$we correspond the associated complex chain$(\overline{S}_{H}^{-1}f)_{*}^{k}$ to a morphism of graded left $\overline{S}_{H}^{-1}A-$module$\overline{S}_{H}^{-1}f : \overline{S}_{H}^{-1}M\longrightarrow \overline{S}_{H}^{-1}N$is an additively exact covariant functor.\item The relation $(C_{H}\circ\overline{S}_{H}^{-1})(-) :G_{r}(A-Mod)\longrightarrow COMP(G_{r}(\overline{S}_{H}^{-1}A-Mod))$ which that for all graded left$A-$module $M$ of $G_{r}(A-Mod)$we correspond the associate complex sequence $(C_{H}\circ\overline{S}_{H}^{-1})(M)=(\overline{S}_{H}^{-1}M)_{*}$ to a graded $A-$module$M$ and for all graded morphism of graded left $A-$modules$f : M\longrightarrow N$ of degree $k$we correspond the associated complex chain$(C_{H}\circ\overline{S}_{H}^{-1})(f)=(\overline{S}_{H}^{-1}f)_{*}^{k}$ to a morphism of graded left $A-$module$f : M\longrightarrow N$is an additively exact covariant functor.

\item \noindent For all $n\in \mathbb{Z}$ fixed and for all $ M \in G_{r}(A-Mod)$ we have:$$\overline{S}^{-1}_{H}((H_{n}\circ C)(M))\cong H_{n}(C_{H}\circ \overline{S}^{-1}_{H})(M)).$$\end{enumerate}
Connected Outer-Hop Independent Dominating Sets in Graphs Under Some Binary Operations
Authors: Manditong Jahiri , Hassan Javier , Laja Ladznar S. , Laja Amy A. , Mohammad Nurijam Hanna M. , Kamdon Sisteta U.
Published: July 2023

Let $G$ be a connected graph. A set $D\subseteq V(G)$ is called a connected outer-hop independent dominating if $D$ is a connected dominating set and $V(G)\s D$ is a hop independent set in $G$, respectively. The minimum cardinality of a connected outer-hop independent dominating set in $G$, denoted by $\gamma_{c}^{ohi}(G)$, is called the connected outer-hop independent domination number of $G$. In this paper, we introduce and investigated the concept of connected outer-hop independent domination in a graph. We show that the connected outer-hop independent domination number and connected outer-independent domination number of a graph are incomparable. In fact, we find that their absolute difference can be made arbitrarily large. In addition, we characterize connected outer-hop independent dominating sets in graphs under some binary operations. Furthermore, these results are used to give exact values or bounds of the parameter for these graphs.
Algebras Satisfying Polynomial Identity of Degree Six that are Principal Train
Authors: Kabré Daouda , Conseibo André
Published: July 2023

In this paper we study the class of algebras satisfying a polynomial identity of degree six that are principal train algebras of rank $3$ or $4$, for which we give the explicit form of the train equation. If the rank of $A$ is $n\geq 5$ in general, we provide the form of the train equation in some cases.
Using $G_{\alpha}$-transform to Study Higher-order Differential Equations with Polynomial Coefficients
Authors: Sattaso Supaknaree , Prasertsang Patarawadee , Prasertsang Torsak
Published: July 2023

In this study, solutions of higher-order differential equations with polynomial coefficients(HODEPCs) were obtained by applying the $G_{\alpha}$-transform. Based on some characterizations, the solutions of HODEPCs were investigated. With the general solution of the HODEPCs, the curves of the general solution can be shown in several examples.
The Homotopy Perturbation Method for Solving Nonlocal Initial-Boundary Value Problems for Parabolic and Hyperbolic Partial Differential Equations
Authors: Al-Hayani Waleed Mohammed , Younis Mahasin Thabet
Published: July 2023

To obtain approximate-exact solutions to nonlocal initial-boundary value problems (IBVPs) of linear and nonlinear parabolic and hyperbolic partial differential equations (PDEs) subject to initial and nonlocal boundary conditions of integral type, the homotopy perturbation method (HPM) is utilized in this study. The HPM is used to solve the specified nonlocal IBVPs, which are then transformed into local Dirichlet IBVPs. Some examples demonstrate how accurate and efficient the HPM.
Strongly 2-Nil Clean Rings with Units of Order Two
Authors: M.Salim Renas , Shuker Nazar
Published: July 2023

A ring R is considered a strongly 2-nil clean ring, or (strongly 2-NC ring for short), if each element in R can be expressed as the sum of a nilpotent and two idempotents that commute with each other. In this paper, further properties of strongly 2-NC rings are given. Furthermore, we introduce and explore a special type of strongly 2-NC ring where every unit is of order 2, which we refer to as a strongly 2-NC rings with U(R) = 2. It was proved that the Jacobson radical over a strongly 2-NC ring is a nil ideal, here, we demonstrated that the Jacobson radical over strongly 2-NC ring with U(R) = 2 is a nil ideal of characteristic 4. We compare this ring with other rings, since every SNC ring is strongly 2-NC, but not every unit of order 2, and if R is a strongly 2-NC with U(R) = 2, then R need not be SNC ring. In order to get N il(R) = 0, we added one more condition involving this ring.
Strong Coproximinality in Bochner $L^p$-Spaces and in Köthe Spaces
Authors: Jawdat Jamila
Published: July 2023

In this paper, we study strong coproximinality in Bochner $L^p$-spaces and in the Köthe Bochner function space $E(X)$. We investigate some conditions to be imposed on the subspace $G$ of the Banach space $X$ such that $L^{p}\left(\mu,G \right)$ is strongly coproximinal in $L^{p}\left(\mu,X \right), 1 \leq p <\infty$. On the other hand, we prove that if $G$ is a separable subspace of $X$ then $G$ is strongly coproximinal in $X$ if and only if $E(G)$ is strongly coproximinal in $E(X)$, provided that $E$ is a strictly monotone Köthe space. This generalizes some results in the literature. Some other results in this direction are also presented.
Another Look at Geodetic Hop Domination in a Graph
Authors: Saromines Chrisley Jade , Canoy Jr. Sergio
Published: July 2023

Let $G$ be an undirected graph with vertex and edge sets $V(G)$ and $E(G)$, respectively. A subset $S$ of vertices of $G$ is a geodetic hop dominating set if it is both a geodetic and a hop dominating set. The geodetic hop domination number of $G$ is the minimum cardinality among all geodetic hop dominating sets in $G$. Geodetic hop dominating sets in a graph resulting from the join of two graphs have been characterized. These characterizations have been used to determine the geodetic hop domination number of the graphs considered. A realization result involving the hop domination number and geodetic hop domination number is also obtained.
(H, Ωb)-Interpolative Contractions in Ωb-distance Mappings with Application
Authors: Qawasmeh Tariq
Published: July 2023

Interpolative Kannan contractions are a refinement of Kannan contraction, which is considered as one of the significant notions in fixed point theory. Gb-metric spaces is considered as a generalized concept of both concepts b-metric and G-metric spaces therefore, the significant fixed and common fixed point results of the contraction based on this concept is generalized resultsfor both concepts. The purpose of this manuscript, is to take advantage to interpolative Kannan contraction together with the notion of Ωb which equipped with Gb-metric spaces and H simulation functions to formulate two new interpolative contractions namely, (H, Ωb)-interpolative contraction for self mapping f and generalized (H, Ωb)-interpolative contraction for pair of self mappings (f1, f2). We discuss new fixed and common fixed point theorems. Moreover, to demonstrate the applicability and novelty of our theorems, we formulate numerical examples and applications to illustrate the importance of fixed point theory in applied mathematics and other sciences.
Convex Roman Dominating Function in Graphs
Authors: Fortosa Rona Jane , Canoy Sergio
Published: July 2023

Let $G$ be a connected graph. A function $f:V(G)\rightarrow \{0,1,2\}$ is a \textit{convex Roman dominating function} (or CvRDF) if every vertex $u$ for which $f(u)=0$ is adjacent to at least one vertex $v$ for which $f(v)=2$ and $V_1 \cup V_2$ is convex. The weight of a convex Roman dominating function $f$, denoted by $\omega_{G}^{CvR}(f)$, is given by $\omega_{G}^{CvR}(f)=\sum_{v \in V(G)}f(v)$. The minimum weight of a CvRDF on $G$, denoted by $\gamma_{CvR}(G)$, is called the \textit{convex Roman domination number} of $G$. In this paper, we determine the convex Roman domination numbers of some graphs and give some realization results involving convex Roman domination, connected Roman domination, and convex domination numbers.
British Put Option On Stocks Under Regime-Switching Model
Authors: Sumalpong Felipe Jr Raypan , Frondoza Michael , Sayson Noel Lito
Published: July 2023

In a plain vanilla option, its holder is given the right, but not the obligation, to buy or sell the underlying stock at a specified price (strike price) at a predetermined date. If the exercise date is at maturity, the option is called a European; if the option is exercised anytime prior to maturity, it is called an American. In a British option, the holder can enjoy the early exercise feature of American option whereupon his payoff is the ‘best prediction’ of the European payoff given all the information up to exercise date under the hypothesis that the true drift of the stock equals a specified contract drift. In this paper, in contrast to the constant interest rate and constant volatility assumptions, we consider the British option by assuming that the economic state of the world is described by a finite state continuous-time Markov chain. Also, we provide a solution to a free boundary problem by using PDE arguments. However, closed form expression for the arbitrage-free price are not available in our setting.
Nuclearity of a Class of Vector-valued Sequence Spaces
Authors: Sidaty Mohamed Ahmed
Published: July 2023

In this note, we deal with a perfect sequence space $\lambda$ and a bornological convex space $E$ to introduce and study the space $\lambda(E)$ of totally $\lambda$-summable sequences from $E$. We prove that $\lambda(E)$ is complete if and only if $\lambda$ an $E$ are complete, nuclear if and only if $\lambda$ an $E$ are nuclear. and we make use of a result of Rolnald C. Rosier to give a similar characterization of the nuclearity of $\Lambda\{E\}$ of all absolutely $\lambda-$ summable sequences in a locally convex $E$.
On B-commutators of B-algebras
Authors: Adanza Joel
Published: July 2023

In this paper, we investigate some properties of B-commutators of B-algebras. We also characterize solvable B-algebras via B-commutators.
Closeness Centrality of Vertices in Graphs Under Some Operations
Authors: Alfeche Farene Loida , Barraza Victor , Canoy Sergio
Published: July 2023

In this paper, we revisit the concept of (normalized) closeness centrality of a vertex in a graph and investigate it in some graphs under some operations. Specifically, we derive formulas that compute the closeness centrality of vertices in the shadow graph, complementary prism, edge corona, and disjunction of graphs.
Image Impulse Noise Reduction Using a Conjugate Gradient of Alternative Parameter
Authors: Jabbar Hawraz N. , Subhi Yeldez J. , Hassan Basim A.
Published: July 2023

Conjugate gradient approaches emphasise the conjugate formula. This study creates a new conjugate coefficient for the conjugate gradient approach to restore pictures using Perry’s conjugacy condition and a quadratic model. Algorithms have global convergence and descent. The new technique performed better in numerical testing. The new conjugate gradient technique outperforms the FR method. The new technique performed better in numerical testing. The new conjugate gradient technique outperforms the FR method.
Exploring the Companion of Ostrowski's Inequalities via Local Fractional Integrals
Authors: Saleh Wedad , Meftah Badreddine , Lakhdari Abdelghani , Kiliçman Adem
Published: July 2023

This paper investigates the companion of Ostrowski's inequality in the framework of fractal sets. First, a new identity related to local fractional integrals is introduced, serving as the foundation for establishing a set of inequalities applicable to functions with generalized $s$-convex and $s$-concave derivatives. An illustrative example is presented to validate the obtained results, demonstrating their accuracy. Additionally, the paper discusses several practical applications, highlighting the significance of the established inequalities. The research presented in this paper contributes to the growing field of studying functions on fractal sets, which has attracted considerable interest from scientists and engineers.
The Generator Graph of a Group
Authors: Tacbobo Teresa L.
Published: July 2023

This paper presents a way to represent a group using a graph, which involves the concept of a generator element of a group. The graph representing a group is called the generator graph. In the generator graph, the vertices correspond to the elements of the group, and two vertices, x and y, are connected by an edge if either x or y serves as a generator for the group. The paper investigates some properties of these generator graphs and obtains the generator graphs for specific groups. Additionally, it explores the relationship between the generator graph of a group and the generating graph introduced by Lucchini et al. in their work [7].
Dokdo Filters and Deductive Systems of Sheffer Stroke Hilbert Algebras
Authors: Ahn Sun Shin , Kim Hee  Sik , Song Seok-Zun , Jun Young Bae
Published: July 2023

To investigate the filter and deductive system of the Schaefer stroke Hilbert algebra using the Dokdo structure, the concept of Dokdo filter and Dokdo deductive system is defined, examples are given, and various properties are investigated. The Dokdo filter is formed by attaching appropriate conditions to the given Dokdo structure. The characterization of Dokdo filter is studied. Dokdo filters related to filters are constructed. Dokdo filter and Dokdo deductive system turn out to be the same concept.
Continuance Intention on Gamifikasi in E-Learning Using Extended Expectation-Confirmation Model
Authors: Sasono Hikmah Agung , Pramana Edwin , Zaman P. C. S. W Lukman
Published: July 2023

In an effort to examine user continuance intentions after using gamification in e-learning, this research was conducted to identify the factors that influence gamification in e-learning using the theoretical model of ECM, then analyze the relationship between the influencing construct variables, and explain the practical and theoretical implications of the effect of gamification in e-learning on user's continued intention to reuse. The theoretical model was developed from the Extended Expectation-Confirmation model (ECM) by integrating the influencing determinants. Descriptive analysis and hypothesis testing using the SEM technique used the Amos 24 application to analyze and interpret data from 496 respondents who participated in an online questionnaire distributed via chat applications and social media. Significant test results have been found for users after using gamification in e-learning, the confirmation variable has a high positive correlation in influencing satisfaction according to the expectations felt by users. The results of the Pearson correlation test conducted show that if the value of gamification user satisfaction in e-learning increases, the intention to continue using e-learning will also increase as found in the five hypothetical determinants that have a direct effect on continuous intention, namely perceived usefulness, satisfaction, engagement, flow, perceived enjoyment. The practical meaning of the findings has a significant effect on continuous intention for educational institutions to research and develop innovative online learning models with gamification to increase the level of user participation, for teachers to ensure that the implementation of the gamification feature has a positive direct effect on sustainability intentions, for users to be able to provide confirmation of benefits obtained with a sense of satisfaction to continue using gamification in e-learning. This study predicts the continuance intention of gamification users in e-learning by analyzing theoretical models influenced by 4 basic ECM constructs plus 3 exogenous variables of engagement, perceived enjoyment and flow. Testing the construct hypothesis, presenting a comprehensive SEM analysis, producing direct and indirect positive significance tests on continuous intention.
Resolução de conflitos entre pais e filhos na adolescência
Authors: Costa Lívia Braga de Sá
Published: July 2023

Durante sua formação, Lívia demonstrou um grande interesse pela compreensão dos processos que levam as pessoas a agirem de forma autônoma. Dentre esses processos, ela se voltou para a resolução de conflitos entre pais e filhos, dedicando-se com persistência e seriedade à realização cuidadosa de várias pesquisas. É com base nas reflexões sobre os resultados de seus estudos, de trabalhos empíricos de outros autores e do aprofundamento do enfoque teórico adotado – Teoria dos Domínios Sociais (TDS) – que este livro foi escrito.
Improvement of the exhaust fume influence on environment through magneto hydrodynamic system
Authors: CO IGWEH  , BO UGWUISHIWU
Published: July 2023

In developing countries the need for combustion exhaust reduction is of great concern, since global warming has been associated with burning of fuel. The objective of the work is on carbon emission elimination with the use of Magneto Hydrodynamic (MHD) system. This system was constructed with Alinco magnets of 8200Guass strength and metal construction with steel of gauge 17. The Magneto hydrodynamic system constructed was used to run three sets of tests for sixty minutes taking readings of 0.5minute,1minute, 2minute, 3minute, 4minute, 5minute, 10 minute, 15minute, 20minute, 25minute, 30minute, 35minute, 40minute, 45minute, 50minute, 55minute, 60minute, and the average was taken. The temperature, oxygen output, carbon (iv) oxide, and the efficiency of the exhaust fume from 800watts generator was measured with and without the constructed Magneto hydrodynamics. The results showed a complete elimination of carbon (iv) oxide, an increase in the combustion efficiency from 83% to 87% on the average, an increase in the oxygen produced from 10% to 20% on the average and a reduction of the exhaust temperature from 264.53o C to 109.53o C. It was observed from the result that there was a total elimination of carbon (iv) oxide this implies that it completely removed the produced carbon(iv) oxide from the 800watts generator, therefore it is completely environmentally safe, also the heat reduction of the output shows a recovery of waste heat from the exhaust system, this improving the energy efficiency.
The characteristics of the mechanical and acoustic bronze cu20sn as traditional bell material
Authors: I Ketut Gede Sugita  , Ketut Astawa  , I Gusti Ngurah Priambadi
Published: July 2023

This study is aimed to find out the mechanical and acoustic characteristics of casting traditional bell's result using metal mold and sand mold. The mechanical and acoustic characteristics of casting traditional bell's result are compared between metal molded and sand molded casting. The bronze alloy was smelted in a crucible furnace at the casting temperatures of 1000, 1050, and 1100 °C. The melted alloy is poured into a sand mold and a preheated metal mold at a temperature of 200 °C. Specimens were formed into bell and billet. The bell form was for acoustic testing. The Billet casted was cut into a few parts and were manufactured as a specimen for hardness test. This study has showed that mechanical characteristic specifically the hardness of metal molded casting is better than sand molded casting. The Acoustic properties of particular damping characteristicsis depended on the porosity of casting’s result. The bell’s tone isn’t produced by the mono frequency but it’s generated by more than one frequency domain. Similarly, the subjective test of acoustic characteristic didn’t show a significant obvious difference.
Importance of fish biodiversity conservation and management
Authors: Martina Meinam  , Y Jackie Singh  , Huirem Bharati  , Teresa Meinam
Published: July 2023

One of the key concerns for enabling the sustainable use of natural resources is biodiversity and its conservation. Fish make up the most varied group of vertebrates and they are considered to be a reliable indication of water pollution. Humans are causing an increasing loss of biodiversity in aquatic ecosystems, which is likely to have a detrimental impact on ecosystem functioning, services, and resistance to future environmental change. Overfising from different water bodies is one of the major issues which could affect the aquatic ecosystems. These fishing pressures may alter the development and behaviour of fish, alter the life cycles and productivity of fish, and reduce availability of fish stocks. All ecosystems undergo change, and both the existence and number of species will fluctuate with or without human intervention and this should be taken into account for safeguarding biodiversity. In some of the most biodiverse areas in the globe, patterns and causes of aquatic biodiversity loss are poorly understood. This is concerning because a growing number of development projects, like hydropower dams, could have significant effects on the fish fauna of the associated river systems. Many of these areas are also among the most threatened aquatic system on Earth and have human populations that are heavily dependent on the ecosystem services they provide.
Case study on Guillain Barre Syndrome
Authors: Antara Dharmik  , Bharti Mandaokar
Published: July 2023

A rapid onset muscle weakness caused by the immune system damaging the peripheral nervous system resulting in Guillian Barre Syndrome. Typically both side of the body are involved and initially symptoms are changes in sensation or pain often in the back along with muscle weakness, beginning in the feet and hands, often spreading to the arms and upper body. A patient who is admitted in emergency diagnosed to have GBS and her muscle weakness leads to inability in walking and moving, despite of this the prognosis of GBS is good and patient gain strength after proper diagnosis.
The use of ground penetrating radar (GPR) method in the evaluation of soil moisture content of parts of cross river central soil for precision agriculture in South-south Nigeria
Authors: Atan Obeten Egor  , Abong Augustine Agwul  , Bisong Samson Asu
Published: July 2023

Using a single offset of the GPR technique, the soil moisture content in the study areas has been satisfactorily characterized. The average water content of selected soils in the Central region of Cross-River State ranges from 0.24m3m-3 to 0.35m3m-3. The majority of the soil in the research area is loamy soil, which has little sand and silt particles, claims the study. The majority of loamy soil is made up of sand, silt, and a small amount of clay. When dry, loamy soil has the consistency of concrete and when wet, it turns into a sticky mess. The majority of plants and vegetables can be grown on loam soil rather than other types of soil. Since loam contains almost equal amounts of all three of these components, it is the best type of soil. In conclusion, some of the Central Cross River State's soils would be suitable for farming.
Penyiraman Tanaman Otomatis pada Tanaman Cabai Rawit dengan Metode Simple Additive Weighting
Authors: Permatasari Indah , Nurfajri  Arofah Nisa'ul , Titan Syifa Fikra
Published: July 2023

Penyiraman tanaman secara konvensional membutuhkan waktu dan tenaga lebih untuk melakukannya. Seringkali pemilik tanaman lupa menyiram tanaman yang dapat menyebabkan tanaman mati. Terkadang pula jumlah air yang disiramkan tidak sesuai dengan air yang dibutuhkan oleh tanaman. Dari permasalahan tersebut, penulis akan membuat sistem penyiraman tanaman otomatis berbasis IoT dengan metode SAW (Simple Additive Weighting). Pada penelitian ini menggunakan tanaman cabai rawit merah, Node MCUESP8266 sebagai mikrokontroler, soil moisture capacitive sebagai sensor kelembaban tanah, dan DHT11 sebagai sensor suhu. Hasil penelitian didapatkan bahwa sistem dapat menyiram tanaman secara otomatis dengan akurasi pembacaan sensor soil moisture capacitive sebesar 96,63% dan pembacaan sensor DHT11 sebesar 98,98%. Selain itu berdasarkan penerapan metode SAW dalam pengambilan keputusan untuk tanaman yang paling berhak disiram yaitu keadaan yang memiliki hasil akhir lebih dari atau sama dengan 36.
The Influence of The Green Learning Method (GeLem) on Students' Environmental Literacy related Biodiversity
Authors: Riani Aisyah
Published: July 2023

This study aims to determine the effect of Green Learning Method (GeLem) learning on students' environmental literacy based on student learning outcomes on biodiversity material in class X Senior High School Prayatna Medan academic year 2021/2022. This research is a quantitative research with a quasi-experimental research type. In this study the sampling technique was carried out by total sampling. The sample in this study consisted of students in class X IPA 2 as the experimental class and students in class X IPA 3 as the control class. The instrument used in the study was an essay test sheet to measure student learning outcomes on biodiversity material. In this study it was found that there was an effect of the green learning method on students' environmental literacy based on student learning outcomes, obtained an average score of 62.7 (pre-test) and 82.5 (post-test) with a percentage of 56.1% which was categorized as effective enough. It can be concluded, there is an effect of the green learning method on students' environmental literacy based on student learning outcomes on biodiversity material.
Development of Teaching Materials related Magnetic Field Based on the Google Sites Assisted Learning Cycle Model
Authors: Yusuf Dwi Sukmawati A. , Rahman Mardia Hi , Saprudin  , Hamid Fatma
Published: July 2023

The development of computer technology provides an opportunity for educators to innovate in the development of digital teaching materials. This development research aims to: 1) develop magnetic field teaching materials based on the Google sites assisted learning cycle model for grade XII students of Madrasah Aliyah, 2) investigate the feasibility of magnetic field teaching materials developed, 3) investigate improvements in student learning outcomes by using teaching materials developed, 4) investigating student responses to the use of teaching materials developed in physics learning. This development research refers to the 5 stages of the ADDIE development design which includes the analyze, design, develop, implementation, and evaluation  stages. The validation of teaching material products involves material experts, media experts and language experts, each of which consists of 3 validators. The teaching material product was implemented by involving 20 students grade XII at one of the Madrasah Aliyah in the City of Tidore Kepulauan. Data collection techniques used in this study were validation sheets, test instruments in the form of multiple choice questions and questionnaires. The results showed that teaching material products based on the Google sites assisted learning cycle model were declared feasible for use in learning. Student learning outcomes have increased after participating in learning. Students also gave very good responses to the use of teaching materials developed in this study.
The Effect of Self Efficacy on the Creative Thinking Ability Learners on Environmental Material
Authors: Wardani Alfanisa Dwi Pramudia , Mufidah Alfi , Mufidah Rifa , Aristiawan
Published: July 2023

Feelings of inadequacy of learners when facing the problem of environmental damage life that occurs in everyday life can create possible conditions and situations hinder students from doing creative thinking process. Lack of self-confidence students to their abilities as well is an influencing factor creative thinking abilities. This research aims to determine the effect of self-efficacy on students’ creative thinking abilities grade VIII on environmental damage material. This research is a quantitative research with statistical test using simple linear regression. The research population was grade VIII students of Junior High School 5 Ponorogo 2022/2023 academic year. Sample that used were grade VIII A and VIII H. Instruments used to collect data in the form of creative thinking ability test instrument on the material environmental damage and self-efficacy scale questionnaire. The results this study are there significant effect between self-efficacy and students’ creative thinking abilities. Self-efficacy is also perfectly and positively correlated with students’ creative thinking abilities contributed as much as 71,2% where the remaining 28,8% influenced by other variables that do not exist in this research. Thus, self-efficacy affects creative thinking ability. This shows the importance of having high self-efficacy, especially in teaching and learning activities
Особенности α → γ-превращения радиальнокованой низкоуглеродистой стали в межкритическом интервале температур
Authors: Барсукова Т. Ю. , Панов Д. О. , Симонов Ю. Н. , Перцев А. С. , Тошков В. Ц. , Ильиных А. В.
Published: July 2023

Исследовано влияние холодной радиальной ковки стали 10Х3Г3МФС в двухфазном мартенситно-ферритном состоянии на кинетику образования аустенита при последующем нагреве с различными скоростями. Определены количественные характеристики стадий образования аустенита и построена термокинетическая диаграмма аустенитизации. Установлена зависимость параметров мартенситно-ферритной структуры и твердости стали от температуры закалки из межкритического интервала температур. Исследовано влияние предварительной радиальной ковки на характер диаграмм одноосного растяжения стали после неполной закалки.
Дилатометрическое исследование структурообразования в стали 30Х2ГСН2ВМ при ступенчатой и изотермической закалках
Authors: Майсурадзе М. В. , Рыжков М. А. , Назарова В. В.
Published: July 2023

Исследована сталь 30Х2ГСН2ВМ (ВЛ1), используемая в авиастроении для изготовления тяжелонагруженных деталей. Установлены температурно-временные интервалы превращений переохлажденного аустенита при непрерывном охлаждении от температуры полной аустенитизации с использованием дилатометрического метода. Осуществлено дилатометрическое моделирование различных вариантов ступенчатой и изотермической закалок, которое позволило выявить особенности превращений, протекающих в стали на разных этапах термической обработки. Проведен анализ механических свойств после изотермической и ступенчатой закалок, а также после закалки в масле и отпуска. Показано, что реализация изотермической закалки и ступенчатой закалки по технологии quenching-partitioning не приводит к ожидаемой стабилизации значительного количества остаточного аустенита и повышению комплекса механических свойств исследуемой стали.
Скорость ползучести штамповок из высокопрочного алюминиевого сплава 1960 (В96ц)
Authors: Шляпникова Т. А. , Оглодков М. С. , Блинова Н. Е. , Доржиев А. Ф.
Published: July 2023

Определены механические свойства штамповок из сплава 1960 в состоянии Т1 при 20, 55, 60 и 65 °C. Проведены испытания на ползучесть образцов штамповок из сплава 1960 в состоянии Т1 при температурах 55, 60, 65 °C и напряжениях 295, 390, 440 МПа длительностью до 5000 ч. Определены скорость ползучести и деформация образцов. Показано, что повышение температуры до 65 °C при испытаниях на растяжение приводит к снижению прочностных характеристик штамповок на 20 – 40 МПа. Повышение температуры и напряжений при испытаниях на ползучесть вызывает увеличение скорости ползучести штамповок.
Влияние изотермической обработки на механические и трибологические свойства сплава Zn – 40 % Al – 2 % Cu – 2 % Si
Authors: Савашкан Темел , Хекымоглу Алы Паша , Азаклы Зекы
Published: July 2023

Исследовано влияние изотермической выдержки при температурах 100 – 250 °C в течение 8 ч на структуру, механические и трибологические свойства сплава Zn – 40 % Al – 2 % Cu – 2 % Si, полученного методом литья в кокиль. Изотермическая обработка устраняет дендритную ликвацию, формируя крупнозернистую полиэдрическую структуру, содержащую a-твердый раствор с мелкими включениями кремния и фазы, содержащей большое количество кремния. Повышение температуры изотермической выдержки приводит к снижению твердости и прочности и повышению пластичности, а также увеличению коэффициента трения и величины износа сплава при снижении средней шероховатости поверхности.
Азотирование стали AISI D2 после глубокой криогенной обработки
Authors: Рамос Ф. Д. , Москосо М. Ф. К. , Регули А. , Дьель И. Л. , Дьель Т. С.
Published: July 2023

Проведено сравнительное исследование структуры, износостойкости и механических свойств инструментальной стали AISI D2 (Х12МФ) после традиционной и альтернативной термической обработки. Традиционная обработка состояла из закалки в вакуумной печи с последующим тройным отпуском, альтернативная — включала глубокую криогенную обработку с последующим азотированием в ванне с расплавленной солью. Установлено, что альтернативная термическая обработка изменяет морфологию вторичных карбидов в структуре стали и позволяет повысить вязкость разрушения при снижении твердости сердцевины.
Влияние скважности импульсного тока на деформационное поведение алюминиевой бронзы
Authors: Пахомов М. А. , Савенков Г. Г. , Смаковский М. С. , Столяров В. В.
Published: July 2023

Исследовано влияние скважности импульсного тока на деформационное поведение, микроструктуру и характер разрушения алюминиевой бронзы БрАЖНМц 9-4-4-1 при растяжении. Проведены испытания на растяжение, изучена структура бронзы. Установлено, что величина скважности тока оказывает заметное влияние на характер кривых напряжение – деформация и механические свойства бронзы, а при минимальной скважности в бронзе возможно образование микротрещин, вызывающих ускоренное разрушение.
Влияние термической обработки на фазовый состав и микротвердость двухфазного сплава Ti – 22Al – 25Nb
Authors: Шао Лин , Чэнь Инвэй , Датье Амит , У Суцзюнь , Ван Тяньлэ , Ту Чжибяо , Чзан Цзитан , Ван Цзиньфан , Сюэ На , Ли Вэйвэй , Дай Чэн , Чжу Лю
Published: July 2023

Исследовано влияние термической обработки на эволюцию фазового состава и микротвердость орторомбического сплава Ti – 22Al – 25Nb на основе Ti2AlNb (O-фазы). Методами рентгеновской дифракции, сканирующей электронной микроскопии и дифракции обратно отраженных электронов изучен фазовый состав сплава после различных режимов термической обработки. Показано, что в структуре сплава присутствуют b/B2- и O-фазы, соотношение которых в результате термической обработки изменяется. Установлена взаимосвязь между микроструктурой и микротвердостью по Виккерсу сплава Ti – 22Al – 25Nb в различных состояниях.
Формирование композиционного материала методом магнитно-импульсной сварки кристаллического титана и аморфного сплава на никелевой основе
Authors: Лазуренко Д. В. , Иванников А. А. , Анисимов А. Г. , Попов Н. С. , Довженко Г. Д.
Published: July 2023

Исследованы трехслойные композиционные материалы, состоящие из пластин ВТ1-0 и аморфного слоя из сплава СТ15 между ними, полученные методом магнитно-импульсной сварки. Изучена структура сформированных материалов методами растровой и просвечивающей электронной микроскопии. Определен фазовый состав композитов с использованием рентгеновского синхротронного излучения и дифракции электронов. Показано, что в процессе сварки аморфная лента подвергалась частичному переплаву и перемешиванию с титаном, а при охлаждении — повторной аморфизации. Титан, взаимодействуя с газами атмосферы, формировал оксиды и нитриды, которые распределялись в зонах переплава аморфного слоя в виде частиц размером не более 35 нм. При сварке аморфной ленты с менее активным никелем не наблюдалось образования дополнительных фаз.
Роль межатомных химических взаимодействий при формировании структуры металлических сплавов при термической обработке
Authors: Устиновщиков Ю. И.
Published: July 2023

Предложен новый подход к объяснению процессов формирования структуры сплавов при термической обработке, принципиально отличающийся от традиционного. Приведены экспериментальные доказательства гипотезы о том, что все процессы, происходящие в сплавах при термической обработке, развиваются за счет межатомных химических связей (ионных и ковалентных), существующих при температурах конденсированного состояния. Это означает, что при каждой температуре нагрева в сплаве формируется микроструктура, отличающаяся от микроструктуры при других температурах по составу или дисперсности выделившихся частиц. В этом случае закалка сплава из области разупорядоченных твердых растворов оказывается совершенно ненужной операцией, тем более что такие растворы в природе не существуют. Рекомендовано исключить такую закалку из промышленного технологического процесса, ограничившись только отпуском.
Изменение предела текучести и определяющее уравнение пластического течения низкоуглеродистой стали при повышенных температурах
Authors: Ван З. Й. , Ма М. Х. , Чжун С. , Чзан С. , Фэн Цзин , Цао Ю.
Published: July 2023

Исследовано влияние горячего изотермического сжатия на симуляторе Gleeble 3500 при температурах 900 – 1200 °C и скорости деформации 0,01 – 10 с – 1 на величину напряжения течения низкоуглеродистой стали. Проведен определяющий анализ напряжения течения при повышенной температуре с помощью функции гиперболического синуса, определены константы материала в интервале степеней истинной деформации 0,1 – 0,7. Изучена дислокационная структура низкоуглеродистой стали после деформации при 1100 °C и охлаждения со скоростью 5 °C/с. Выведено и обосновано определяющее уравнение для описания и моделирования поведения низкоуглеродистой стали при высокотемпературной деформации. Показано, что полученное уравнение со средней относительной ошибкой 5,1219 % и коэффициентом корреляции 0,9886 может надежно и достоверно описывать поведение низкоуглеродистой стали при горячей штамповке. Уравнение может использоваться для моделирования процесса и оптимизации технологических параметров горячей деформации стали, а также для прогнозирования эволюции ее микроструктуры.
Микроструктура и износостойкость нитридных слоев на Армко-железе, полученных азотированием с нулевым расходом газа
Authors: Кеддам М. , Макуч Н. , Островска К. , Мальдзински Л.
Published: July 2023

Исследовано влияние контролируемого газового азотирования с нулевым потоком при 500 и 550 °C различной длительности на структуру, фазовый состав и износостойкость Армко-железа. Определен фазовый состав нитридного слоя. Изучена кинетика роста и определена износостойкость в условиях сухого трения нитридного слоя, полученного при потенциале азотирования 1 атм – 0,5 в течение 10 ч. Установлено, что газовое азотирование с нулевым потоком способствует формированию поверхностного слоя g¢-фазы, что повышает износостойкость Армко-железа за счет снижения интенсивности потери массы.
Износостойкость алюминиевого сплава А356 после твердого анодного оксидирования
Authors: Башйийит Азиз Барыш , Азаклы Зеки , Гюмрюк Реджеп , Биджан Осман
Published: July 2023

Исследована эффективность применения твердого анодного оксидирования алюминиевого сплава ASTM A356 в качестве альтернативы покраске его поверхности. Изучены микроструктура, фазовый состав и микротвердость оксидированного слоя толщиной 45, 65, 80 и 90 мкм. Проведены испытания на эрозию твердыми частицами в соответствии с ASTM G76 и MIL STD 3033. Установлено, что с увеличением толщины оксидированного слоя износостойкость алюминиевого сплава снижается, а шероховатость поверхности уменьшается.
Повышение электропроводности спеченного порошкового материала Al – Cu за счет гальванического покрытия частиц алюминия медью
Authors: Путери Нарендра Гарини , Юй Ю-Вэй , Ли Вэнь-Сы
Published: July 2023

Синтезирован экономичный Al – Cu-порошок с высокой электропроводностью с использованием реакции химического замещения. Частицы порошка представляли собой алюминиевую сердцевину, на которую нанесена медная оболочка. Реакция осаждения происходила в растворе сульфата меди при 45 °C. При более высоких температурах диффузия меди протекает быстрее, но возникает вероятность растрескивания алюминиевого сердечника. Процесс замещения алюминия медью на поверхности частицы развивается при разной величине стандартного потенциала каждого металла. Минимальное удельное электросопротивление 1,01 × 10 – 7 Ом × м получено в композите, спеченном при 550 °C из полученного порошка “сердцевина Al – оболочка Cu” с добавлением 3 % (масс.) стеклянной фритты. Этот материал может иметь широкое применение, в том числе как заменитель серебра в электронных устройствах для снижения себестоимости производства.