bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hierarchical Clustering Algorithm Based on Density Peaks using Kernel Function for Thalassemia Classification
Authors: Hartini S , Rustam Z 
Published: December 2019

Abstract
Thalassemia is an inherited blood disorder and one of the most common genetic diseases in the world, with its classification due to the processes involved in patients’ treatment. Therefore, it is essential to obtain a precise diagnosis due to an appropriate treatment receives a higher lifetime value. A new method based on the kernel, modified from hierarchical clustering based on density peaks (HCDP) was proposed in this research. Furthermore, the concept of k-nearest neighbor and hierarchical clustering, consists of three steps were utilized. These steps include local density calculation, hierarchy representation, and optimal cluster extraction. The modification of this technique is therefore based on the polynomial kernel function, which was expected to be more accurate in separating data that cannot be detached linearly. Data utilized was obtained from Harapan Kita Hospital, West Jakarta, Indonesia, and it consists of 82 thalassemia and 68 non-thalassemia samples. Using the proposed method, the performance of HCDP with/without kernel function in this paper were examined using 10-fold cross-validation and compared using the confusion matrix by calculating its F1-Score. The results concluded that hierarchical clustering based on density peaks gives approximately 67.77 percent F1-Score, while 70.06 percent is obtained when the method is combined with the kernel function.
Comparison of Confidence Intervals for the TG Estimator in Capture-recapture Data
Authors: Anan Orasa , Kanjanasamranwong Preedaporn , Chantarangsri W. , Sofro A’yunin 
Published: December 2019

Abstract
Capture-recapture techniques are very powerful tool and widely used for estimating an elusive target population size. Capture-recapture count data is presented in form of frequencies of frequencies data. They consist of the frequency of unites detected exactly once, twice, and so on, and the frequency of undetected unites is unknown. As consequence, the resulting distribution is a zero-truncated count distribution. The binomial distribution is selected as a simple model if the maximum number of counting occasions is known. It counting occasions are not known in advance, the series of frequencies assumed to be the Poisson distribution. In fact, the target population might be heterogeneous because it has different characteristics, resulting in over or under dispersion based on the basic models. The mixed Poisson, which is the exponential-Poisson mixture model, have been widely used to construct population size estimator for capture-recapture data. The original Turing estimator provides a good performance under the Poisson distribution. Additionally, an extension of Turing estimator, called the Turing-based geometric distribution with non-parametric approach was proposed (TG) for the heterogeneous population. It gives an easy way to estimate the target population size. In this work, we derived uncertainty measures for the TG estimator by considering two sources of variance (M1), and the second way is using only one source of variance (M2). It is emphasised that although the analytic approaches to compute uncertainty measures can be easily used in practice, there are valid asymptotically and requires a large sample size. Therefore, re-sampling approaches, true bootstraps (M3), imputed bootstrap (M4) and reduced bootstrap (M5), are proposed as alternative methods to get uncertainty measures. The study compares performance of variance and confidence interval of paralytics and re-sampling methods by using a simulation study. Overall, the imputed bootstrap is the best choice for estimating variance and constructing confidence interval for the TG estimator. The analytic approach with two sources of variance remains successful to estimate variance and calculate confidence interval in the case of large. It is very clear that the reduced bootstrap and the analytic approach with one source of variance are not appropriate in all situations. For the true bootstrap, the true value of population size is often unknown in nature; therefore, it quite useless for capture-recapture study.
Modelling the Influence of Unhealthy Human Behaviour on the Spread of Zoonosis Disease that May Cause a Possible Future Pandemic
Authors: Sidik WA 
Published: December 2019

Abstract
This paper addresses some strategies to improve the quality of management system in the laboratories by presenting models and methods for analyzing the effect of un-healthy human behavior on zoonosis disease spread and possible future pandemic. The possible future pandemic is modelled by a hypothetical mutated virus as a result of virus recombination. The variability of seven disease states among anima and humans are described as deterministic processes and modeled in the form of a well-defined initial value problem. The epidemic model has six disease state equilibria of which four are globally asymptotically stable and the others are locally asymptotically stable. Analyses show that: (i) to control the spread of disease means to control the effective rate of disease transmissions (ii) containing the disease in the animal world does not stop the spread of the implicated diseases in the human world. (iii) the spread of the mutant virus has a bigger magnitude than original in terms of the proportion of individuals acquiring the disease. (iv) reducing the contact among the animals will reduce the spread of the disease in the animal and human population but not stop the spread of the mutant virus. (v) social distancing programs reduce the number of human casualties.
The Composition of Water and Ash of Secang Wood’s Simplicia and Secang Wood Herbal Drink Powder
Authors: Anggarani M A , Ayuningsih A D , Yudianto E , Prasodi B A 
Published: December 2019

Abstract
Empirically, secang wood (Caesalpinia sappan L.) has medicinal properties and is consumed as a health drink. Secang wood contains tannin, gallic acid, brazilin, tannic acid, essential oils, polyphenols and sappanin. Switching people’s tastes from consuming the basic form of sappan wood to a more attractive and practical form, which is an herbal drink that contains the properties. The secang drink is measured by water and ash content. Water content is related to the stability index while ash content about minerals is filled. The initial probability of the quality of the secang herbal drink can be compared with that of both aspects. The lower the water content in a product, the better the quality, the higher the stability which can be further improved during storage. While the higher the ash content, the higher the probability of mineral content. Based on the analysis of water content and ash content, it is known that the simplicia of the secang wood is 1.542% while the water content of the herbal drink powder is 0.266%. Meanwhile, based on the analysis of ash content, ash content of simplicia secang bark is 9,449% while the water content of herbal beverage powder is 0,009%.
Synthesis and Characterization of Collagen-Chitosan-Sodium Hyaluronates as Artificial Cornea
Authors: Widiyanti P , Rini N D W , Kirana M N , Astutik T 
Published: December 2019

Abstract
As reported by Riset Kesehatan Dasar, Indonesia facing a serious problem of blindness with 966.326 cases of 2 million population in 2013. Gold standard such as keratoplasty couldn’t completely heal corneal injury due to the recipient’s rejection and limited donor. In order to overcome those concerns, artificial corneal tissue needs to be developed to produce an artificial cornea which is biocompatible, supports corneal function, and applicable. This research was conducted to provide an initial description of Collagen – Chitosan - Natrium Hyaluronate (Col-Chi-NaHA) as an artificial cornea through FTIR analysis, hydrophilicity and water absorption measurement. The artificial cornea was synthesized by forming ratio of collagen 20% w/v and chitosan 10% w/v, both solutions were dissolved in 0,1 M and 0,6 M acetic acid separately. Into the mixed solution, NaHA was dripped slowly with variation of 0%, 0,3%, and 0,6%. The homogenous solution was cast and heated for 24 hours at 35°C. The dry membranes were neutralized to obtain a pH around 7. From the analysis known that all of the characteristic bands of Col-Chi-NaHA could be observed in obtained membranes. Water absorption measurement demonstrated percentages over 90% on all membranes. The contact angle of obtained membranes was decreased by the addition of NaHA. The results showed that artificial cornea made from Col-Chi-NaHA successfully fabricated has hydrophilic properties to support cellular interaction and provide hydration to keep eye’s clarity and permeability. Therefore, Col-Chi-NaHA could may be a suitable material for the tissue-engineered cornea.
Identification and Exploration of Elementary School Teacher Misconception in Mathematical Learning
Authors: Rahaju E B , Iriyani D , Artiono R 
Published: December 2019

Abstract
Mathematics is one of the compulsory subjects that must be taught to students at all levels of education. It creates students not only to have the ability to think logically, critically, analytically, creatively, and meticulously, but also carefully develop the ability to use mathematics in problem solving. Therefore, mathematics teachers are required to convey mathematical concepts correctly. Unfortunately, there are some elementary school teachers whose understanding of the concepts in mathematics learning is incorrect. The aim of this study was to identify the misconception of elementary school teachers in mathematics learning. This type of research was descriptive-qualitative research, where data had been analysed qualitatively. The research data were in the form of interviews and observations of the subjects, namely elementary school teachers in Sidoarjo district. Regarding to the data, there were several misconceptions in elementary school teachers, consisting of 1) Defining the apex point of the cone as the angle formed by the curved side; 2) Defining a cone surface as a side; 3) Defining a cylinder surface as a side, and 4) Defining the cone as a pyramid.
The Influence of Cognitive Style on Mathematical Communication of Prospective Math Teachers in Solving Problems
Authors: Budayasa I K , Juniati D 
Published: December 2019

Abstract
Communication is important to connect with others. It is one of the important aspects that must be mastered by the prospective math teacher as a tool of knowledge transfer. They are expected to have good mathematical communication skills to facilitate them in the mathematics learning process. Problem-solving in learning mathematics is something that cannot be ignored. Through problem-solving, students can have a better understanding of concepts because through mathematical problem solving, and students are required to be more active in using the concepts they have in a variety of new situations encountered. FD/FI cognitive style is the extent to which a person perceives parts of a field discrete from the surroundings rather than embedded in it as a whole. Based on differences from cognitive style, it certainly affects the way of communication, especially mathematical communication. So, the aim of this research was exploration the mathematical communication of prospective math teacher in solving problem viewed from FI/FD cognitive style. This type of research was descriptive research with a qualitative approach. The subjects of this research were 86 prospective math teachers. Data were collected through tests, assignments, and task-based interviews. The results of this study indicated that mathematical communication from FD and FI students were not different when solving routine problems, but were different when solving non-routine problems, which require strategy and decision making. FD students had difficulty communicating their strategies clearly and coherently. Meanwhile, FI students explained the strategies they used in more detail.
Profile of Students’ Strategy in Senior High School with Cognitive Reflective and Impulsive Style in Solving the Combinatorial Questions
Authors: Aini N , Juniati D , Siswono T Y E 
Published: December 2019

Abstract
The goal of this research is to describe the strategies used by the Senior High students with the reflective and impulsive cognitive style in solving combinatorial questions. The strategy is seen from three aspects, namely: formulating, representing, and solving aspect. The subject of the research is the eleventh grade students based on the test of MFFT (The Matching Familiar Figures Test), to determine the reflective and impulsive cognitive style and also the communicative of research subject. The data is collected by giving the combinatorial questions and identifying the subject’s strategy in solving the questions through interview. The validation used is time triangulation. The data analysis used is data reduction, data representation, and conclusion. The result shows that the students with reflective type are different from the students with impulsive type. When it is in the formulation stage, student with reflective cognitive style (RCS) reads the question slowly with strong intonation and gives the information by using his own words. In the representation, RCS draws four parallel boxes as many as the representation of the digits. In solving the question, RCS chooses the strategy based on the question rule, by memorizing and using strategy, RCS ways checks each step. While, in the formulation, ICS reads the question first, then makes parts of the questions by not using his own words. In the representation, student with impulsive cognitive style (ICS) uses the mathematics symbol. In solving the questions, ICS chooses a strategy fast without seeing the question rules overall and uses the strategy spontaneously without rechecking so that there are many mistakes found.
The Investigation of Blind Students’ Misconception in Constructing Quadrilateral Analytic Definition Using Geometry’s Puzzle
Authors: Andriyani  , Juniati D 
Published: December 2019

Abstract
Many students still possessed misconceptions and not yet know the relation between each quadrilateral, no exception blind students that have abnormal physiological structures. Lack of student’ ability in relational thinking makes it difficult to construct analytic definitions that contain the closest type (genus proximum) and special differentiator (differentia specifica) on the objects. The aim of this study is to investigate the misconceptions of blind students in constructing the analytic definition of a quadrilateral using geometry’s puzzles. Misconception investigations focus on misconceptions of students’ concept or differences of student’ scientific understanding with the expert conceptions, especially misconception in constructing analytic definitions. This research is an exploratory study with a qualitative approach and the subjects of this study are one seventh grade student who experienced totally blind and one student who low vision from MTs Yaketunis Yogyakarta. Data collection through task-based interviews and observations. Before being analyzed, the obtained data then transcribed, classified, reduced and validated using the time triangulation method. Based on the results of data analysis, it is known that both of blind students have misconceptions namely classificational, relational and theoretical misconceptions with the level of misconception in low vision student lower than totally blind.
Investigating Covariational Reasoning: What Do Students Show when Solving Mathematical Problems?
Authors: Fuad Y , Ekawati R , Sofro A , Fitriana L D 
Published: December 2019

Abstract
Covariational reasoning plays a significant role for solving problems. This study examines the covariational reasoning of master program students when solving mathematical problems such as fraction, velocity and acceleration, proportion, and integral. 26 students of mathematics education master program, Universitas Negeri Surabaya, are involved in this study. Generally, mental action of students is more prominent on fraction and proportion than on the other issues. On fraction and proportion problems, most students are able to fulfill all mental actions such as coordinating the value, the direction, and the amount of change of one variable, and also coordinating the average and the instantaneous rate of change of the function. However, on velocity, acceleration, and integral problems most students cannot show their mental actions well. They only fulfill 3 of 5 mental actions of covariational reasoning. Generally, the shape of their graph related to those problems are irrespective with initial point. These findings suggest that learning in mathematics should place increased emphasis on problem involving graph to promote covariational reasoning of the students.
The Instructional Design of Blended Learning on Differential Calculus Using Successive Approximation Model
Authors: Wintarti A , Abadi  , Fardah D K 
Published: December 2019

Abstract
The combination of traditional learning where teacher and students are in the same classroom and e-learning using technology is known as blended learning. This paper outlines the process of designing blended learning on Differential Calculus. The Successive Approximation Model (SAM) is used as the instructional design upon the course. In the preparation phase, the information gathering is starting to ensure an agreement between the learner’s need and learning solution. Afterward, the design and prototype of a blended course was implemented for Mathematics Education students on Mathematics Department Universitas Negeri Surabaya. Along with iterative development phase, the evaluation is conducted in order to make the course move to Alpha (a complete version of the instructional design blended learning) then evolve into Beta (a better version after Alpha revised) and then the Gold as finale version is reached.
Effectiveness of Inquiry-Creative-Process Learning Model to Promote Critical Thinking Ability of Prospective Physics Teachers
Authors: Wahyudi  , Verawati N N S P , Ayub S , Prayogi S 
Published: December 2019

Abstract
Critical thinking has become one of the main competencies of learning at the level of higher education in Indonesia, and teaching interventions that lead to the achieving of these competencies are important to do. One of the learning models developed to promote critical thinking ability is the Inquiry Creative Process (ICP), a learning model. This research aims to describe the effectiveness of the ICP learning model to promote the critical thinking ability of prospective physics teachers. The implementation of the ICP learning model involved prospective physics teachers at four higher education institutions in the province of West Nusa Tenggara - Indonesia, that are the Mataram University (UNRAM), Teacher Training and Education Institut of Mataram (IKIP Mataram), Mataram State Islamic University (UIN Mataram), and the University of Muhammadiyah Mataram (UM Mataram). This study is experimental research, where is for each group performed pretest, implementation of the ICP learning model, and then posttest. The critical thinking ability of prospective physics teachers was measured using a critical thinking ability test instrument. The data of critical thinking ability were analyzed descriptively and statistically, where the homogeneity, normality, t-test, and ANOVA test were conducted. The results showed that the implementation of the Inquiry Creative Process learning model was effective to promote the critical thinking ability of prospective physics teachers. Descriptions of further research results are described in this article.
Development of A-SSI Learning Media (Android Social Scientific Issues) to Improve Science Literation in Earth Coating Subject for First Grade of Junior High School
Authors: Jalil R M , Prastowo T , Widodo W 
Published: December 2019

Abstract
This study aims to provide an alternative learning process that was supported by the use of A-SSI media (Android Social Scientific Issues) by including actual issues so that they could train and improve students’ scientific literacy skills. The developing A-SSI media must be tested for feasibility based on three aspects, they were validity, effectiveness, and practicality. This study used a pretest-posttest design and tested on grade VII junior high school students. A-SSI media that would be used in learning process is validated by experts through a validation sheet. The results obtained based on the validators’ assessment are 88.5% with the criteria “very good”. In addition, effectiveness of A-SSI media is tested through literacy tests and student responses. The results obtained in the literacy test, literacy skills of students were increased with an average n-gain of 0.66 with “moderate” category, there was a response given by students in the learning process with A-SSI media, 88.9% students gave a positive response of the using of A-SSI media. Then in the last aspect, that was practicality of media was reviewed through student activities and implementation of learning. The results obtained in the implementation of learning, 89.8% of activities designed in RPP were carried out well, while the activities of students based on the results of observation were very good and showed activities that supported scientific literacy skills.
Activities of students in using worksheet based on Contextual Teaching and Learning
Authors: Fauziah A M , Nurita T 
Published: December 2019

Abstract
This study aims to describe the activities of students in using student worksheets based on Contextual Teaching and Learning (CTL). The method used is descriptive quantitative. Student worksheets based on Contextual Teaching and Learning that are used in learning consist of three sub-layers are atmosphere, lithosphere, and hydrosphere. In CTL-based student worksheets, there are 7 main components of CTL are constructivist, questioning, modelling, finding, community learning, reflection, and authentic assessment. Learning outcomes using CTL-based Student Worksheets are easier for students to understand learning material, this is shown by students in solving problems on student worksheets properly. Based on the results of the study it can be concluded that learning by using Student Worksheets based on Contextual Teaching and Learning helps students more easily understand the subject matter.
Practicality and effectiveness of Jigsaw-Modified Learning Models integrated on ARCS (Attention, Relevance, Confidence, and Satisfaction) motivation in Invertebrate material to complete student learning outcomes
Authors: Windy Sheren R. , Ibrahim Muslimin , Kuntjoro Sunu 
Published: December 2019

Abstract
This study aims to produce a Jigsaw-modification learning model integrated with ARCS motivation that is valid, practical, and effective with learning tools that support learning. This research is a type of development research with a 4-D (Four-D Models) development model and experimental design of The One Group Pretest and Posttest Design. The preparatory activities were carried out at Postgraduate, UNESA while the trials on 30 students class X MIA-1 students have held at High School 1 Madiun in January 2019 until March 2019. The practicality of the model and the learning tools were reviewed from the classical implementation with an average of 3.95 with very good categories and student activities at 3.6 in the good category. The effectiveness of the model and learning device is based on the results of increasing student motivation gain score learning outcomes of 0.6 with moderate criteria, completeness of 100% learning outcomes with high gain scores. Based on the results of data analysis and discussion of research, it can be concluded that Jigsaw-modification learning models integrated the ARCS motivation that was developed properly, in terms of effectiveness and practicality. Learning models and devices developed can complete student learning outcomes seen from aspects of motivation and improvement in learning outcomes.