bluuebunny/crossref_metadata_2025 huggingface dataset:
Some Properties of g-Groups
Authors: Caraquil Joey A. , Baldado Michael Jr. Patula
Published: July 2022

A nonempty set G is a g-group [with respect to a binary operation ∗] if it satisfies the following properties: (g1) a ∗ (b ∗ c) = (a ∗ b) ∗ c for all a, b, c ∈ G; (g2) for each a ∈ G, there exists an element e ∈ G such that a ∗ e = a = e ∗ a (e is called an identity element of a); and, (g3) for each a ∈ G, there exists an element b ∈ G such that a ∗ b = e = b ∗ a for some identity element eof a. In this study, we gave some important properties of g-subgroups, homomorphism of g-groups, andthe zero element. We also presented a couple of ways to construct g-groups and g-subgroups.
Fractional Order Techniques for Stiff Differential Equations Arising from Chemistry Kinetics
Authors: Wannan Rania , Aslam Muhammad , Farman Muhammad , Akgül Ali , Kouser Farhina , Asad Jihad
Published: July 2022

In this paper, we consider the stiff systems of ordinary differential equations arising from chemistry kinetics. We develop the fractional order model for chemistry kinetics problems by using the Caputo Fabrizio and Atangana-Baleanu derivatives in Caputo sense. We apply the Sumudu transform to obtain the solutions of the models. Uniqueness and stability analysis ofthe problem are also established by using the fixed point theory results. Numerical results are obtained by using the proposed schemes which supports theoretical results. These concepts are very important for using the real-life problems like Brine tank cascade, Recycled Brine tank cascade, pond pollution, home heating and biomass transfer problem. These results are crucial for solving the nonlinear model in chemistry kinetics.
The Fuglede-Putnam Theorem and Quasinormality for Class p-wA(s, t) Operators
Authors: Rashid Mohammad H.M. , Altaweel Nifeen
Published: July 2022

In this work, we demonstrate that (i) if T is a class p-wA(s, t) operator and T(s, t) is quasinormal (resp., normal), then T is also quasinormal (resp., normal) (ii) If T and T∗ are class p-wA(s, t) operators, then T is normal; (iii) the normal portions of quasisimilar class p-wA(s, t) operators are unitarily equivalent; and (iv) Fuglede-Putnam type theorem holds for a class p-wA(s, t) operator T for 0< s, t, s + t = 1 and 0 < p ≤ 1 if T satisfies a kernel condition ker(T) ⊂ ker(T∗).
A New Sushila Distribution: Properties and Applications
Authors: Boonthiem Somchit , Moumeesri Adisak , Klongdee Watcharin , Ieosanurak Weenakorn
Published: July 2022

In this paper, we introduce a new continuous distribution mixing exponential and gamma distributions, called new Sushila distribution. We derive some properties of the distribution include: probability density function, cumulative distribution function, expected value, moments about the origin, coefficient of variation (C.V.), coefficient of skewness, coefficient of kurtosis, moment generating function, and reliability measures. The distribution includes, a special cases, the Sushila distribution as a particular case p=1/2 (θ = 1). The hazard rate function exhibits increasing. The parameter estimations as the moment estimation (ME), the maximum likelihood estimation (MLE), nonlinear least squares methods, and genetic algorithm (GA) are proposed. The application is presented to show that model to fit for waiting time and survival time data. Numerical results compare ME, MLE, weighted least squares (WLS), unweighted least squares (UWLS), and GA. The results conclude that GA method is better performance than the others for iterative methods. Although, ME is not the best estimate, ME is a fast estimate, because it is not an iterative method. Moreover, The proposed distribution has been compared with Lindley and Sushila distributions to a waiting time data set. The result shows that the proposed distribution is performing better than Lindley and Sushila distribution.
On 2-Resolving Dominating Sets in the Join, Corona and Lexicographic Product of Two Graphs
Authors: Cabaro Jean Mansanadez , Rara Helen
Published: July 2022

Let G be a connected graph. An ordered set of vertices {v1, ..., vl} is a 2-resolving set for G if, for any distinct vertices u, w ∈ V (G), the lists of distances (dG(u, v1), ..., dG(u, vl)) and (dG(w, v1), ..., dG(w, vl)) differ in at least 2 positions. A 2-resolving set S ⊆ V (G) which isdominating is called a 2-resolving dominating set or simply 2R-dominating set in G. The minimum cardinality of a 2-resolving dominating set in G, denoted by γ2R(G), is called the 2R-domination number of G. Any 2R-dominating set of cardinality γ2R(G) is then referred to as a γ2R-set in G. This study deals with the concept of 2-resolving dominating set of a graph. It characterizes the 2-resolving dominating set in the join, corona and lexicographic product of two graphs and determine the bounds or exact values of the 2-resolving dominating number of these graphs.
Restrained 2-Resolving Sets in the Join, Corona and Lexicographic Product of Two Graphs
Authors: Cabaro Jean Mansanadez , Rara Helen
Published: July 2022

Let G be a connected graph. An ordered set of vertices {v1, ..., vl} is a 2-resolving set for G if, for any distinct vertices u, w ∈ V (G), the lists of distances (dG(u, v1), ..., dG(u, vl)) and (dG(w, v1), ..., dG(w, vl)) differ in at least 2 positions. A set S ⊆ V (G) is a restrained 2-resolving set in G if S is a 2-resolving set in G and S = V (G) or ⟨V (G)\S⟩ has no isolated vertex. The restrained 2-resolving number of G, denoted by rdim2(G), is the smallest cardinality of a restrained 2-resolving set in G. A restrained 2-resolving set of cardinality rdim2(G) is then referred to as an rdim2-set in G. This study deals with the concept of restrained 2-resolving set of a graph. Itcharacterizes the restrained 2-resolving set in the join, corona and lexicographic product of two graphs and determine the bounds or exact values of the 2-resolving dominating number of these graphs.
Some Double Integrals Stemming from the Boltzmann Equation in the Kinetic Theory of Gasses
Authors: Srivastava Hari M.
Published: July 2022

The main object of this article is to revisit a certain double integral involving Kummer’s confluent hypergeometric function 1F1 , which arose in the study of the collision terms of the celebrated Boltzmann equation in the kinetic theory of gases. Here, in this article, we propose to investigate some novel extensions and generalizations of this family of double integrals. We also point out some relevant connections of the results, which are presented here, with other related recent developments in the theory and applications of hypergeometric functions.
Variative Problems in Teaching Mathematics
Authors: Aliyev Samed Jahangir , Tahirov Bahadur O. , Hashimova Tarana A.
Published: July 2022

The article discusses problems with ambiguous conditions, the solution of which leads to several variants of answer. Such problems are called variative problem. The role of variative problems in intellectual development of schoolchildren in mathematics classes are described in this article. Proposed a methodology for including variative problems in the process of teaching mathematics.
Annihilator Hyperideals in Strong Bounded Dual Distributive Meet-hyperlattice
Authors: Rezq Eman , Abughazalah Nabilah
Published: July 2022

In this paper, we study the properties of annihilator hyperideals in the class of strong bounded dual distributive meet-hyperlattice. We show that the set of all closed hyperideals forms a Boolean algebra. We introduce the concept of homomorphism, which preserves the annihilator hyperideal. Suitable conditions for preserving annihilator hyperideals are obtained. Representationand characterization theorems of annihilator hyperideals in sub-meet-hyperlattice and product meet-hyperlattice are proved.
A Sufficient Descent Property to Improving a ThreeTerm Conjugate Gradient Algorithm
Authors: Al-Naemi Ghada M. , Saeed Firas Mahmood
Published: July 2022

The nonlinear conjugate gradient (NLCGM) methods have received attention because due to their simplicity, low memory requirements, and global convergent property, which allows them to be used directly to solve large-scale nonlinear unconstrained optimization problems. We suggested a modification to the β KMAR k formula, applied with three-term conjugate gradient method that is both simple and effective, denoted by (TTKMAR), which has a sufficient descent property (SDP) and ensures global convergence (GCP) when we use any line search. The numerical efficiency of TTKMAR was assessed using a variety of standard test functions. TTCGM has been demonstrated to be more numerically efficient than two-term CG methods. This paper also quantifies the difference between TTCGM and two-term methods of performance. As a result, we compare our new modification to an efficient two-term and TTCGM in the numerical results. Finally, we conclude that our proposed modification.
On Movable Strong Resolving Domination in Graphs
Authors: Sumaoy Helyn Cosinas , Rara Helen
Published: July 2022

Let G be a connected graph. A strong resolving dominating set S is a 1-movable strong resolving dominating set of G if for every v ∈ S, either S \ {v} is a strong resolving dominating set or there exists a vertex u ∈ (V (G) \ S) ∩ NG(v) such that (S \ {v}) ∪ {u} is a strong resolving dominating set of G. The minimum cardinality of a 1-movable strong resolving dominating set of G,denoted by γ1 msR(G) is the 1-movable strong resolving domination number of G. A 1-movable strong resolving dominating set with cardinality γ1msR(G) is called a γ1msR-set of G. In this paper, we study this concept and the corresponding parameter in graphs resulting from the join, corona and lexicographic product of two graphs. Specifically, we characterize the 1-movable strong resolvingdominating sets in these types of graphs and determine the exact values of their 1-movable strong resolving domination numbers.
Some Identities on λ-analogues of r-Stirling Numbers of the Second Kind
Authors: Kim Dae San , Kim Hye Kyung , Kim Taekyun
Published: July 2022

Recently, the λ-analogues of r-Stirling numbers of the first kind were studied by Kim-Kim. The aim of this paper is to introduce the λ-analogues of r-Stirling numbers of the second kind and to investigate some properties, recurrence relations and certain identities on those numbers. We also introduce the λ-analogues of Whitney-type r-Stirling numbers of the second and derive similar results to the case of the λ-analogues of r-Stirling numbers of the second kind. In addition, we consider the λ-analogues of Dowling polynomials and deduce a Dobinski-like formula.
The Force on a Magneto-spherical Particle Oscillating in a viscous Fluid Perpendicular to an Impermeable Planar Wall with Slippage
Authors: El-Sapa Shreen
Published: July 2022

The effect of a magnetic field and slip on the motion of a solid sphere moving perpendicular to an unbounded rigid wall in an unlimited viscous fluid is investigated. As the sphere vibrates perpendicularly to the rigid wall, its center line is accompanied by a low amplitude vibration. A slip condition is applied to the sphere surface, while a no-slip dynamic condition is applied to the wall. Additionally, a semi-analytical method and a numerical scheme using collocation are presented. Furthermore, we calculate the amplitude of the non-dimensional coefficients of drag force acting on the solid sphere using various values of frequency, separation, and magnetic parameters. In addition, streamlines are plotted. The results of the magnitude normalized drag force are compared with those in previous literature.
Bounds for the Convex Combination of Contra-harmonic and Harmonic Means by the Generalized Logarithmic Mean
Authors: Sonubon Annop , Orankitjaroen Somsak , Nonlaopon Kamsing
Published: July 2022

We verify the optimal inequalities between generalized logarithmic mean and the weighted arithmetic mean of contra-harmonic and harmonic means.
Hermitian Adjacency Matrices of Mixed Graphs
Authors: Abudayah Mohammad Ali , Alomari Omar , Sander Torsten
Published: July 2022

The traditional adjacency matrix of a mixed graph is not symmetric in general, hence its eigenvalues may be not real. To overcome this obstacle, several authors have recently defined and studied various Hermitian adjacency matrices of digraphs or mixed graphs. In this work we unify previous work and offer a new perspective on the subject by introducing the concept of monographs. Moreover, we consider questions of cospectrality.
Restrained 2-Resolving Dominating Sets in the Join, Corona and Lexicographic Product of Two Graphs
Authors: Cabaro Jean Mansanadez , Rara Helen
Published: July 2022

Let G be a connected graph. An ordered set of vertices {v1, ..., vl} is a 2-resolving set for G if, for any distinct vertices u, w ∈ V (G), the lists of distances (dG(u, v1), ..., dG(u, vl)) and (dG(w, v1), ..., dG(w, vl)) differ in at least 2 positions. A set S ⊆ V (G) is a restrained 2-resolving dominating set in G if S is a 2-resolving dominating set in G and S = V (G) or ⟨V (G)\S⟩ has no isolated vertex. The restrained 2R-domination number of G, denoted by γr2R(G), is the smallest cardinality of a restrained 2-resolving dominating set in G. Any restrained 2-resolving dominating set of cardinality γr2R(G) is referred to as a γr2R-set in G. This study deals with the concept of restrained 2-resolving dominating set of a graph. It characterizes the restrained 2-resolving dominating set in the join, corona and lexicographic product of two graphs and determine the bounds or exact values of the restrained 2-resolving domination number of these graphs.
A New Secant Type Method with Quadratic-Order Convergence
Authors: Salih Zinah , Hassan Basim , Sulaiman Barah
Published: July 2022

Using the development of the second approximation, a variation of the standard secant technique for nonlinear problems has been developed. The iterative formula is created using Taylor series expansion, which includes an estimate of the second derivative of Θ(μ). It is demonstrated that the new approaches have quadratic convergence. In comparison with the Newton technique employing seven test functions in the practical application, it turns out that the performance of the method is efficient.
On Salem Formal Power Series
Authors: Dammak Oussama , Mansour Saber
Published: July 2022

In this paper, we will take a look at Salem elements dealing with formal power series on Fq, where Fq is a finite field . Our main result, presents a criteria for an element to be the smallest Salem element (SSE) via an order extending a given order in Fq. Moreover, we provide the CFE of the (SSE) for each n.
A Short Introduction to Similarity via Ideals
Authors: Guldurdek Asli
Published: July 2022

In this work, we introduce the notion of similarity between topologies τ_1 and τ_2, on a set X via ideals. Then, we give some characterizations regarding this kind of similarity by using ∗−dense, and I−dense subsets. We also examine the preservation of similarity with respect to the topologies τ ∗_1 and τ ∗_2 .
Ideals in BE-algebras Based on Lukasiewicz Fuzzy Set
Authors: Ahn Sun Shin , Roh Eun Hwan , Jun Young Bae
Published: July 2022

For the purpose of applying the concept of Lukasiewicz fuzzy set to ideals in BE-algebras, Lukasiewicz fuzzy ideal is introduced, and its properties are studied. The relationship between fuzzy ideal and Lukasiewicz fuzzy ideal is discussed. Conditions for the Lukasiewicz fuzzy set to be a Lukasiewicz fuzzy ideal are provided, and characterizations of Lukasiewicz fuzzy ideal are displayed. Conditions in which three subsets, called ∈-set, q-set and O-set, are ideals are explored.
Applications of Double Fuzzy Sumudu Adomain Decompositon Method for Two-dimensional Volterra Fuzzy Integral Equations
Authors: F. Alidema Artan
Published: July 2022

In this paper, we combine double Sumudu transform with Adomian decomposition method to solve two dimensional fuzzy convolution Volterra integral equations. We give some definition for fuzzy number, fuzzy valued function which are prerequest for combine the double fuzzy Sumudu transform with Adomian decomposition transform method. We describe the method and finally, numerical examples are given to illustrate the efficiency and applicability of our method.
Supercliques in a Graph
Authors: Dela Cerna Ramil , Canoy Sergio
Published: July 2022

A set S ⊆ V (G) of a (simple) undirected graph G is a superclique in G if it is a clique and for every pair of distinct vertices v, w ∈ S, there exists u ∈ V (G) \ S such that u ∈ NG(v) \ NG(w) or u ∈ NG(w) \ NG(v). The maximum cardinality among the supercliques in G, denoted by ωs(G), is called the superclique number of G. In this paper, we determine the superclique numbers of some graphs including those resulting from some binary operations of graphs. We will also show that the difference of the clique number and the superclique number can be made arbitrarily large.
On the Planarity of a Directed Pathos Total Digraphs of Some Special Arborescence Graphs
Authors: Pamplona Jill Maegan B. , Aniversario Imelda S.
Published: July 2022

An arborescence graph is a directed graph in which, for a vertex u called the root, and any other vertex v, there is exactly one directed path from u to v. The directed pathos of an arborescence Ar is defined as a collection of minimum number of arc disjoint open directed paths whose union is Ar. In [6], for an arborescence Ar, a directed pathos total digraph Q = DP T(Ar)has vertex set V (Q) = V (Ar) ∪ A(Ar) ∪ P(Ar), where V (Ar) is the vertex set, A(Ar) is the arc set, and P(Ar) is a directed pathos set of Ar. The arc set A(Q) consists of the following arcs: ab such that a, b ∈ A(Ar) and the head of a coincides with the tail of b; uv such that u, v ∈ V (Ar) and u is adjacent to v; au(ua) such that a ∈ A(Ar) and u ∈ V (Ar) and the head (tail) of a is u; P a such that a ∈ A(Ar) and P ∈ P(Ar) and the arc a lies on the directed path P; PiPj such that Pi, Pj ∈ P(Ar) and it is possible to reach the head of Pj from the tail of Pi through a common vertex, and it is also possible to reach the head of Pi from the tail of Pj .In this paper, the concept of planarity of the directed pathos total digraph (that is, as an acyclic directed graph which can be drawn with non crossing arcs oriented in one direction) is being discussed and applied to a directed pathos total digraph of an arborescence Ar (DP T(Ar)). Further, the internal vertices of these directed pathos total digraph of Ar are cconsidered.Finally, the planarity of an arborescence resulting from the vertex-gluing of two directed paths ispresented and corresponding internal vertex number is obtained.
Şehir Göstergelerinin (Ç)evrilmesi: Bir İstanbul Anlatısının Başkalaşmış Yüzleri
Authors: TUNA Didem , ÇELİK ÖZKAN Begüm
Published: July 2022

Bir eserde olayların geçtiği uzamın rastgele seçilmeyeceği düşünülürse, kurgusal veya gerçek uzamın temsil ettiği mekânla bağlantısı dikkat edilmesi gereken bir husustur. Ayrıca şehri konu alan eserlerde kimi zaman sadece şehrin değil, o kültüre ilişkin belli kalıp yargıların da ortaya koyulduğu bir gerçektir. James Bond’un yaratıcısı Ian Fleming’in From Russia With Love (1957) adlı eseri İstanbul’da geçen casus romanları arasında belki de en popüler olandır. Ancak Fleming eserinde İstanbul’a yer verirken, Türkiye ve Türklerle ilgili önyargıları da kitabına taşımıştır. Bu çalışmanın bütüncesi From Russia With Love başlıklı roman ve romanın Türkçe ve Fransızca çevirilerinden oluşmaktadır. Çalışmada çeviri ve göstergebilim işbirliği temelinde disiplinler arası bir yaklaşım benimsenmekte ve kaynak metinle erek metinlerin karşılaştırmasında mekâna yönelik önemli dönüşümler Sündüz Öztürk Kasar’ın çeviri göstergebilimi yaklaşımı çerçevesinde ele alınmaktadır. Bu amaçla, Öztürk Kasar’ın Paris Göstergebilim Okulu çalışmalarından derlediği kesitleme ve yerdeşlik kavramları ile Algirdas Julien Greimas’ın geliştirdiği göstergebilimsel dörtgen çözümleme işlemi olarak kullanılmakta ve çözümlemeler Edward Said’in oluşturduğu Şarkiyatçılık kavramı ışığında incelenmektedir. Kaynak metinde yer alan İstanbul ve Türklere ilişkin göstergelerle bunların erek metinlerdeki yansımaları ise Öztürk Kasar tarafından geliştirilen “Çeviride Anlam Evrilmesi Dizgeselliği” (2021) doğrultusunda karşılaştırılıp değerlendirilmektedir. Sonuç olarak İngilizce kaynak metin aracılığıyla açık ya da örtük olarak yeniden üretilen Şarkiyatçı klişelerin Fransızca erek metin aracılığıyla aynı şekilde aktarıldığı, ancak Türkçe çevirilerde kaynak metnin İstanbul’a ilişkin yarattığı olumsuz imajın tersine döndürüldüğü ortaya koyulmaktadır.
GENDER ANALYSIS OF COPING BEHAVIOUR, E-LIFESTYLE, AND HAPPINESS ON MILLENNIAL GENERATION IN COVID-19 PANDEMIC ERA
Authors: Kurniawati Intan Dwi , Puspitawati Herien
Published: July 2022

Changes that occur due to the Covid-19 pandemic are faced by all people, including the millennial generation. This study aims to analyze coping behavior, e- lifestyle, and happiness of the millennial generation during the Covid-19 pandemic based on gender. The research was conducted by a cross-sectional study using a non-probability voluntary sampling method. Data collection was carried out in April, and the study samples were obtained from 32 males and 68 females. Primary data was taken using a google form distributed to the millennial generation aged 22-41 years and living in Bogor, West Java. The location was chosen considering West Java has a happiness index (70.23) below the national happiness index (71.49) and is included in the five provinces with a low happiness index. The results of the descriptive analysis show that coping behavior, e- lifestyle, and happiness of the millennial generation during the Covid-19 pandemic are in the moderate category. The results of the different tests found no significant differences by gender in coping behavior, e-lifestyle, and millennial happiness. The SEM-PLS model shows that coping behavior significantly affects e- lifestyle. In addition, it was also found that coping behavior had a significant effect on the happiness of the millennial generation during the pandemic. Based on the results of this study, the happiness of the millennial generation during the Covid-19 pandemic is important, one of which is through coping behavior.
ANALYSIS OF SATISFACTION LEVEL AND NET BENEFIT IPB UNDERGRADUATE STUDENTS TOWARDS THE USE IPB MOBILE FOR STUDENT APPLICATION
Authors: Shabila Frista , Moh. Djemdjem Djamaludin
Published: July 2022

IPB University implements a mobile-based management information system through the IPB Mobile for Student application to bring technological innovation closer and realize transformation into a digital campus. This study aims to analyze the perception of quality, level of satisfaction and net benefit felt by S1 IPB students towards the IPB Mobile for Student application. This research is a quantitative research using explanatory design. This research was conducted on IPB students using voluntary sampling techniques so that 306 respondents were obtained. Data is collected through tools in the form of questionnaires that are distributed online using google forms. The data obtained were processed using Microsoft Excel, SPSS version 25, and SEM-LISREL 8.80. The results of the influence test showed a positive and significant influence on the perception of quality on user satisfaction and user satisfaction had a significant positive effect on net benefits.  The advice that can be given is that users are expected to provide input on the shortcomings in the application so that IPB University as an application developer can improve the quality of the IPB Mobile for Student application.
KNOWLEDGE, ATTITUDE, AND BEHAVIOR TO PREVENT COVID-19 INFECTION IN GENERATION Y IN PONOROGO REGENCY, EAST JAVA
Authors: Khoirul Anam Ridhoni , Muflikhati Istiqlaliyah
Published: July 2022

Generation Y has the highest rate of Covid-19 contaminated cases. This is due to frequent movements and activities outside the home. This study was intended to investigate the impact of individual characteristics, knowledge, and attitudes on behaviour to prevent infection with Covid-19 in Ponorogo. The sample in this study amounted to 100 people with an age range of 20-35 years, consisting of 16 people and 84 women. The sampling technique used is voluntary sampling. The questionnaire was made in a form, and the link was distributed online. Data analysis used descriptive tests and SEM-PLS. The results of the SEM-PLS show that there is a significant effect of gender on knowledge and behaviour in preventing infection with Covid-19, as well as attitudes towards behaviour in preventing infection with Covid-19. The results show no significant differences in knowledge, attitudes, and behaviours to prevent infection with Covid-19 in urban and rural individuals. Individual women have better knowledge and behaviour to prevent infection with Covid-19 than men, and good behaviour will increase behaviour to prevent infection with Covid-19. Socialization and behaviour to prevent infection with Covid-19 must be increased, especially for men.
FAMILY CLIMATE, PERCEPTION, AND ADOLESCENTS' STRESS PRIOR TO AND DURING COVID-19 PANDEMIC
Authors: Indah Dahlia  , Hastuti Dwi
Published: July 2022

The COVID-19 pandemic has various impacts on life, one of which causes stress in adolescents. This study aims to analyze the influence of family climate and adolescent perceptions of stress levels during the pandemic. This study used a cross-sectional study design. The sampling in this study used a non-probability sampling method with a voluntary sampling technique through the distribution of bold questionnaires. The research sample was 113 junior high and high school students aged 13-18 in the Greater Jakarta area (Jakarta, Bogor, Depok, Tangerang, Bekasi). Based on the study results, the category of almost all teenagers has a family climate in the medium. Almost approaching adolescents, adolescents' perceptions and stress levels during the pandemic are included in the low category. There was no significant difference between adolescents' perceptions before and during the pandemic, while adolescents' stress level was significantly higher than before the pandemic. The study's results showed that family climate was negatively related to adolescent stress levels during the pandemic. On the other hand, adolescent perceptions during the pandemic were significantly positively related to the stress level of adolescents during the pandemic. Factors that significantly negatively affect adolescent stress levels during the pandemic are family size and family climate (on the dimensions of relationships in the family and family violence). Adolescent perceptions during the pandemic have a positive effect on adolescent stress levels during the pandemic.
IS THE ROLE OF FATHER’S PARENTING IMPORTANT FOR THE CHARACTER BUILDING OF STUDENTS?
Authors: Putri Hidayat Wulan Sari , Hastuti Dwi
Published: July 2022

The strength of character can be manifested through the interactions of parents, especially fathers, in the parenting process. This study aimed to analyze the influence of student characteristics, family characteristics, and the role of fathers' parenting on character strength. This study used an explanatory design involving 289 first-year students living with complete parents. Sampling was taken by voluntary sampling. Data were obtained by self-reporting through online questionnaires and analyzed by multiple linear regression using SPSS. The findings show that there are nine indicators of paternal parenting such as positive involvement, positive emotional response, negative involvement, moral roles, gender roles, provider roles, androgynous roles, father's presence, and father's responsibility. In addition, there are three indicators of the strength of characters, such as moral knowledge, moral feelings, and moral action, which contain six virtues in the form of wisdom, justice, humanity, determination, self-control, and spirituality. The study's results prove that the role of a father's parenting significantly positively affects character strength. Overall, the strength of student character cannot be separated from the role of family care, especially for fathers.
JOB MOTIVATION, WORK-FAMILY CONFLICT, AND JOB SATISFACTION OF FORMAL WORKING MOTHERS DURING COVID-19 PANDEMIC
Authors: Sovya Melati Meida Eka , Rizkillah Risda
Published: July 2022

Work from home (WFH) policies can fade the boundaries between family and work matters, reduce work motivation, and create uncertainty that impacts job satisfaction. This study aims to analyze the effect of work motivation and work-family conflict on job satisfaction of formal working mothers during the Covid-19 pandemic. This study used a cross-sectional research design. The selection of research locations was chosen purposively, namely DKI Jakarta and West Java, because these two provinces were the two provinces that contributed the most Covid-19 cases in Indonesia. Data were obtained by self-administered using a questionnaire that was distributed online. The sampling technique was done by voluntary sampling. The respondents of this study were 99 formal working mothers with intact families who have school-age children (6-12 years). Correlation test results show a relationship between intrinsic work motivation, extrinsic work motivation, and work-family conflict with job satisfaction. In addition, the regression test results showed that the husband's age and identified regulation positively and significantly affected job satisfaction. The results also showed that during the Covid-19 pandemic, most formal working mothers had job satisfaction in the moderate category.
GENDER'S ROLE IN FINANCIAL MANAGEMENT AND PURCHASING DECISIONS ON THE QUALITY OF DUAL-EARNER FAMILY MARRIAGE DURING THE COVID-19 PANDEMIC
Authors: Lazuardi Cut Michelle , Puspitawati Herien
Published: July 2022

The misalignment of gender roles can affect the quality of marriage because it causes conditions of injustice, and one of the parties will be harmed. This study aims to determine the effect of gender roles in financial management and purchasing decisions on the quality of family marriages during the Covid-19 pandemic. A cross-sectional study design was used in the study. The method used is self-management with an online questionnaire. The study was conducted in DKI Jakarta, which was selected purposively. The voluntary sampling technique was used to obtain 106 working wives who have children and are domiciled in DKI Jakarta. The collected data were processed using Microsoft Office Excel software, Statistical Package for Social Science (SPSS) 25.0 for windows, and Smart Partial Least Square (SmartPLS). The results showed that the amount of education and income of husbands, children, family size, and gender roles in financial management and purchasing decisions were related to marriage quality. Furthermore, the regression test results show that the husband's income and gender roles in purchasing decisions positively affect the quality of marriage. This study suggests that families further improve the distribution of balanced roles in financial management activities and strategies to improve role performance.
Analysis of student responses to online learning in biology subjects at Senior High School of Central Lombok
Authors: Listiana Nova , Setiadi Dadi , Kusmiyati Kusmiyati
Published: July 2022

The current Covid-19 pandemic has a significant impact on all aspects of human life, one of which is in the field of education. This study aims to determine how the senior high school students of North Batukliang central Lombok Indonesia respond to online learning in biology subjects. This research is qualitative descriptive research. The sampling technique in this research is saturated sampling. Meanwhile, the instruments used in this study were interviews and questionnaires. The study showed a positive response: the understanding indicator obtained a student response of 61%, and the independence indicator was 67%, which was included in the strong category. In the facility indicator, the student response value is 79% which is in a very strong category. The learning process still needs to be optimized and needs to be evaluated for the sake of improving online learning in the next period.
Development of E-module Food Chemistry Constructivism-Based 5-Phase Needham
Authors: Ibrahim A Rachman , Suharman Andi , Sari Dwi Wulan
Published: July 2022

This study aims to produce a valid and practical e-module of food chemistry constructivism based 5-phase Needham's. This research is development research with ADDIE development model combined with Tessmer formative evaluation. The stages of ADDIE development used in this study include the analysis stage, the design stage, and the development stage only, which then proceeds to the Tessmer formative evaluation stage which includes expert review, one to one, and small group. At the expert review stage, the e-module food chemistry was validated by experts from the fields of pedagogic experts, material experts and design experts. The results of the validation assessment scores obtained at the expert review stage in the pedagogic field are 0.848 (high), the material field is 0.895 (high), and the design field is 0.889 (high). This shows that the e-module constructivism based 5-phase Needham's that has been developed is valid. The practicality of the e-module constructivism based 5-phase Needham's is seen from the practicality questionnaire scores at the one-to-one stage and the small group stage. The one to one stage resulted in a score of 0.865 (high) and in the small group stage it was 0.865 (high), which means that the e-module based constructivism 5-phase Needham has been practically developed
Reflection on Student Collaboration Skills Assessment by Biology Teachers
Authors: Sugiharto Bowo , Hidayati Nurul
Published: July 2022

Collaboration skill is a skill possessed by a person to work effectively in a team to achieve specific goals. Collaboration skills become essential for students to master because these skills become provisions for students to face global competition and improve social aspects. This study aims to identify how teachers measure student collaboration skills in biology at high schools in the Surakarta region. The research conducted was survey research with 76 Biology teachers in Soloraya consisting of 23 private school teachers and 53 public school teachers. The instrument used was a questionnaire in the form of a data collection form developed from collaboration skills based on NEA and P21. Analysis of questionnaire data using Rasch modeling. The analysis result shows that the item has a good reliability with a KR-20 value of 0.9. Based on the results of data analysis, biology teachers at public schools took more collaborative skill measurements of students than in private schools, especially in the aspects of responsibility and other respects
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Authors: Wahyuni Ayu Latiefah Eka , Arrohman Dony Auliya , Wilujeng Insih , Widowati Asri , Suyanta Suyanta
Published: July 2022

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Development of BioPhy Magazine Containing Local Wisdom to Improve Problem Solving Ability and Promote Environmental Awareness Campaign
Authors: Fitriah Lutfiyanti , Ita Ita
Published: July 2022

The purpose of this study was to describe the validity and effectiveness of BioPhy Magazine based on local wisdom, which was developed to improve problem-solving skills and encourage students to conduct environmental awareness campaigns. This type of research was development research with the Tessmer formative evaluation model. The small group trial subjects are Chemistry Tadris students who are taking Basic Physics courses in the 2021/2022 academic year. Data were obtained through validation sheets, problem-solving tests, and poster assessment sheets. The data were then analyzed using the Aiken formula, N-gain, effect size, and Wilcoxon test. The results of the analysis showed that the developed magazine was valid from the aspect of content, presentation, and language. Magazines were also effective in improving problem-solving skills, with an N-gain score on the small group test of 0.90 with a high category and an effect size of 3.34 with a strong influence category. In addition, based on the Wilcoxon test, it was known that Asymp. Sig. (2-tailed) of 0.005, which meant that there was a significant difference in problem-solving ability between before and after learning. In addition, magazines could encourage students to carry out environmental awareness campaigns as indicated by the average student environmental poster score of 95.38. So, BioPhy Magazine was valid, effective, and successful in encouraging students to carry out environmental awareness campaigns
Distribution of the Fraunhofer Diffraction Intensity by a Rectangular Slit Using a Razor Blade
Authors: Trisnowati Eli , Marwoto Putut , Iswari Retno Sri , Cahyono Edy
Published: July 2022

This research was conducted by making a rectangular slit using a razor blade as a narrow gap in the Fraunhofer diffraction experiment. The intensity distribution measurement on the resulting diffraction pattern uses a voltage divider circuit. This circuit takes advantage of the nature of the LDR, which changes resistance when exposed to light. Experiments show that a diffraction pattern screen when a 560 nm coherent light passes through a narrow rectangular slit made of razor cut. We measured the narrow gap using a tracker application with the resulting gap size (0.3564 x 0.4677) mm. The ratio of the intensity distribution of the x-axis bright pattern on the Fraunhofer diffraction by a rectangular slit with slit size height x width = (0.4677 x 0.3564) mm from b = -5p to 5p (maximum 4, maximum 3, maximum 2, maximum 1, central maximum, maximum 1, maximum 2, maximum 3, maximum 4) is 0.000873; 0.000763; 0.005395; 0.020583; 1; 0.039658; 0.008088; 0.002554; 0.001218. The ratio of the intensity distribution of the y-axis bright pattern on the Fraunhofer diffraction by a rectangular slit with slit size height x width = (0.4677 x 0.3564) mm from g = -5p  to 5p (maximum 4, maximum 3, maximum 2, maximum 1, central maximum, maximum 1, maximum 2, maximum 3, maximum 4) is 0.001890; 0.001469; 0.002447; 0.040516; 1; 0.037141; 0.006482; 0.001690; 0.000440. This study indicates that diffraction experiments and the measurement of the diffraction pattern’s intensity can be carried out with simple materials and equipment and can be used in the correct experiment.
CTL-Based Physics E-Book to Improve Students Physics Problem Solving Skills in Senior Highschool
Authors: Fitriadi Prasetyo , Latumakulita Ivandra Immanuela , Jumadi Jumadi , Warsono Warsono
Published: July 2022

This article reports on the validity of CTL-based physics e-books and the effectiveness of media developed for student problem-solving skills. This research is development research and uses a quantitative approach. The subjects of this research were 17 students of class X science class and 26 students of class X social class at one of the senior high schools in Yogyakarta as the implementation class and modeling classes. The results of this study indicate that the development of a CTL-based physics e-book on simple harmonic oscillation material is feasible in terms of expert validation results where the average total validation score is 3.75 with a very high category. The use of a CTL-based physics e-book in the learning process is able to have a significant influence on improving the problem-solving skills of students in both classes, which is indicated by the value of sig. (2-tailed) of 0.00 both for modeling and implementation classes which are smaller than the alpha value of 0.05.
Effectiveness of ICARE Learning Model in Improving Students’ Critical Thinking Skills and Collaboration Skills
Authors: Saputri Mawarni , Elisa Elisa , Nurlianti Siska
Published: July 2022

The aim of this study was to know the effectiveness of the ICARE learning model in improving students' critical thinking skills and collaboration skills. The type of research conducted in this research was classroom action research. In this study, there were three stages of data collection namely planning, implementation and data analysis which were analyzed using descriptive statistics. The research instrument used was a critical thinking skill test in essay form, an observation sheet for teacher and student activities in learning, a teacher ability observation sheet, a student response sheet and an observation sheet for students’ collaboration skills. The result showed that ICARE learning model was effective in improving students' critical thinking skills and collaboration skills. The result of students' responses to the ICARE learning model were also very positive. This positive response showed that students were very enthusiastic about the learning presented and make it easier for students to understand the material.
Development of Project-Based Electronics Practicum Module with Virtual Lab to Increase Students’ Creativity
Authors: Widiarini Putu , Rapi Ni Ketut , Pramadi I Putu Wina Yasa , Udayana Ketut Wira
Published: July 2022

One alternative source of learning physics can be a project-based practicum module with a virtual laboratory, especially for increasing student creativity. The purpose of this research is to develop a valid, practical, and effective project-based electronics practicum module with a virtual lab. The validity of the module is obtained from the validation results by three validators, namely content experts, learning experts, and media experts. The practicality of the module is obtained by giving response questionnaires to one lecturer in an electronics course and 12 students in semester 5A of the Physics Education study program. The effectiveness of the module is obtained by giving a project that can increase students’ creativity. The developed module is very valid with an average validity of 3.70. The developed module is very practical with average practicality of 3.76. The effectiveness of the module is in the moderate category with a normalized average gain score of 0.51. The results show that the developed module is very valid, very practical, and effective so that it can be used as one of the teaching materials in electronics lectures
Construction and Validation of Evaluation Instruments for Science Learning Programs Based on Context, Input, Process, And Product (CIPP) Models
Authors: Alvianita Cindy , Tanti Tanti , Hariyadi Bambang
Published: July 2022

This
study aims to develop an evaluation instrument for science learning program in junior high schools based on the CIPP (Context, Input, Process, Product) evaluation model. This research uses the exploratory sequential mix method for instrument development. The qualitative stage was carried out through in-depth interviews with five principals and ten teachers. The qualitative stage aims to analyze needs in the field and explore the opinions of school principals and teachers regarding the evaluation of science learning programs. Researchers distributed instruments to 112 participants for the quantitative stage of the validation test. The instrument was validated in three stages. The first stage is the face validity test, the second stage is the Exploratory Factor Analysis (EFA) test, and the last stage is the Confirmatory Factor Analysis (CFA) test. The results of face validity conducted with two experts stated that each indicator developed had followed the flow of the Context, Input, Process, and Product (CIPP) model. Exploratory Factor Analysis Test Based on scree plot data, it was found that there was a fault after the four components, and the researcher decided to take four elements with a total variance of 50.95%. The confirmatory Factor Analysis (CFA) test showed that from 47 items, only 35 items were declared valid. This research has positive implications for the practice of integrated science learning at the junior high school level in Indonesia. Principals and teachers can use this CIPP-based evaluation instrument to evaluate the effectiveness of the integrated science learning process that has been carried out so far
Analysis of Concept Understanding and Students' Attitudes towards Learning Physics in Material of Straight Motion
Authors: Capriconia Jenny , Mufit Fatni
Published: July 2022

Understanding the concept and having a positive attitude towards studying physics is a requirement to succeed in studying physics. Studies have shown that students have low conceptual understanding and do not yet have positive attitudes toward learning physics. This research aims to analyze students' conceptual understanding of Straight Motion for class X, analyze students' attitudes towards learning physics, and analyze the correlation between conceptual understanding and students' attitudes towards teaching physics. This type of research is descriptive research with a quantitative approach and the population of all students of class X SMAN in Payakumbuh City and a sample of 205 students. The sampling technique used the purposive sampling technique using the Four-Tier Multiple Choice and Likert Scale. The research results revealed: Students understood the concept of 33.93% in the medium category.  Students' attitudes towards studying physics are good, but the indicators of interest in increasing the time to study physics tend to be in the reasonably good category. The correlation between conceptual understanding and student attitudes with a significance value of 0.000 and a correlation value of 0.490 means that the correlation between the concept understanding variable and the student attitude variable is moderate.
Validity Analysis Using the Rasch Model in the Development of Alkane Concept Test Instruments
Authors: Mulyanti Sri , Suwahono Suwahono , Setiowati Hanifah , Ningrum Lis Setiyo
Published: July 2022

This study aims to test the feasibility of the test instrument as a measuring tool for student knowledge of alkane compounds in the online form of 15 multiple choice questions on the concept of characteristics, physical properties, and nomenclature of alkanes. The questions were tested on 85 students who had studied the subject of alkanes. The feasibility analysis includes the level of problem difficulty, construct validity, content validity, and reliability. The results of the analysis show that the items developed are feasible according to the Rasch model.
Profile of Critical Thinking Ability in Ecosystem Materials using the Rasch Model
Authors: Karoror Irmansyah , Jalmo Tri
Published: July 2022

This study aims to determine the ability of students in solving critical thinking questions. There are 20 multiple choice questions as an instrument of critical thinking questions. The test was carried out in class VII SMP Yapis Manokwari which consisted of 23 students. This research is a descriptive study using the Rasch model with winstep software. The results showed that the average score of students in solving critical thinking questions reached 57%. The Rasch model shows that students 23, 04, and 21 have high intelligence, while students 05, 08, 03, 10, 17, 01, 15, 19, 11, and 18 have the lowest abilities. The results showed that the ability of students to solve critical thinking questions was still in the low category. This can be used as an evaluation description for teachers to improve students' critical thinking skills
Study of STEM Based on Local Wisdom in Hoening Science Process Skills in the 21st Century Era
Authors: Mukaromah Latifatun , Mustadi Ali , Nisa Ana
Published: July 2022

The purpose of this study was to examine the topic of STEM based on local wisdom in honing science process skills in the 21st century era. This study used a literature review research design. The population of this article is 100 journals found both internationally and nationally. The sample of this article is 15 journals found based on criteria with 10 international journals and 5 national journals. The results of this study are STEM learning based on local wisdom can increase creativity, critical thinking, process skills, and can train students for skills in Indonesia. The conclusion of this study is that STEM learning based on local wisdom can be an alternative in honing process skills in the 21st century era.