bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of hydrokxyapatite based duck egg shells using precipitation method
Authors: Malau N D , Adinugraha F 
Published: June 2020

Abstract
The need for implants increases with the high number of fracture sufferers resulting from accidents both on the road and workplace accidents. Bioceramics is a ceramic product or component used in the medical and dental industry, especially as an implant or organ replacement. Hydroxyapatite is one type of bioceramics that is widely used because it has osteoconductive properties (can stimulate bone growth), bioactive and biocompatible. This study aims to reduce and add value to the use of duck egg shells waste. This research method consists of three stages, namely: calcination of duck egg shells, HA synthesis with the wise drop precipitation method and Characterization using XRD and SEM to identify the phase, lattice parameters, and crystal size and determine the morphology of the sample which has been synthesized. HAp synthesis was carried out by reacting CaO from duck eggshells with phosphate source (NH4) 2HPO4 using precipitation method at 1000°C sintering temperature for 5 hours and calcination time for 4 hours. Based on the results of the XRD analysis showed the purity of the Hap sample. While the SEM test shows the morphology of the HAp sample.
The effect of applying fertilizer of moringa leaf (Moringa oliefera) extract and rice washing water to the growth of pakcoy plant (Brassica rapa L. spp. Chinensis (L.))
Authors: Sari P N , Auliya M , Farihah U , Nasution N E A 
Published: June 2020

Abstract
The hydroponic system is increasingly popular in Indonesia. In 2014, 597,674 tons of pakcoy were harvested from hydroponic products. However, the hydroponic system uses mix AB fertilizer which is relatively expensive. Moringa leaf and rice washing water have high mineral and vitamin content. There are cytokinin in moringa leaves which are useful for growth so that they can be used as organic liquid fertilizer. This study aims to determine the response of pakcoy growth to the provision of organic liquid fertilizer made from moringa leaves and rice washing water which is relatively cheap. Organic liquid fertilizer is made through the process of moringa leaf fermentation and rice washing water. The treatment given is in the form of 40% AB mix and 60% fermented organic liquid fertilizer. This treatment showed the results in the form of increased leaf size, number of leaves, stem diameter and weight per sample. The addition of organic liquid fertilizer to Pakcoy resulted in an increase in leaf width and length, number of leaves and weight per sample.
Factors to increasing the employee performance through knowledge management systems implementation at PT. XYZ
Authors: Sardjono W , Mukhlis M , Selviyanti E 
Published: June 2020

Abstract
Organizational ability to manage knowledge is becoming increasingly important in the current era of globalization and the industrial revolution era 4.0, especially for companies. By optimally managing knowledge in the company, the business processes in the company will be effective and efficient. In order to obtain high effectiveness in the process of sharing knowledge that already exists in PT. XYZ, the evaluation of the implementation of knowledge management systems is needed to find out how to manage knowledge optimally. The purpose of knowledge management is to transform the knowledge possessed by employees into explicit knowledge owned by an organization where employees work, so that the effectiveness of knowledge management can be used to improve employee performance and employee knowledge can be maintained properly, so as to provide more benefits for the company, especially for handling customer complaints. All knowledge held by the company must be disseminated so that the company's core knowledge can be developed and knowledge management as an instrument in achieving company or company goals. Knowledge Management Systems are the main facilities for sharing the knowledge and experience of employees. So, the evaluation process is needed to find out how the process of knowledge transfer can affect KMS performance to improve employee performance. The analytical method to analyze the implementation of management in PT. XYZ is to use factor analysis and the questionnaire will be processed using factor analysis to obtain new factors that can be used as forming factors for evaluating the implementation of existing knowledge management systems to be competitive advantage
In silico anti-inflammatory activity evaluation of some bioactive compound from ficus religiosa through molecular docking approach
Authors: Utami W , Aziz H A , Fitriani I N , Zikri A T , Mayasri A , Nasrudin D 
Published: June 2020

Abstract
This tree generally is used as traditional medicine for several ailments. In this research, the In Silico approach using molecular docking has been applied to 11 compounds from the Ficus religiosa to the cyclooxygenase-2 (COX-2) receptor. This study aimed to predict the ability of 11 compounds from the Ficus religiosa in inhibition COX-2 enzyme as a prostaglandin source. The detailed information was obtained using the molecular docking approach. Docking simulation for 11 compounds was executed through AutodockVina embedded in MGL Tools 1.5.6. The lowest binding energy of the complexes was visualized by using Discovery Studio (Biova) software. It was found that campesterol provided the lowest binding energy to COX-2, while kaempferol strongly was tied to TYR385 and SER530 of the receptor. The compounds containing anti-inflammatory effect have the lowest binding energy, and binds to the residue as native ligands. This result is indicated that the compounds from Ficus religiosa have potency as an anti-inflammatory agent. Still, advanced research is needed to examine more ligands from Ficus religiosa to isolate the best conformation.
Community structure of fruit tree species on successful marginal land conservation in Jombang Regency, East Java Province, Indonesia
Authors: Zulfikar  , Arisoesilaningsih E , Indriani S , Fernandes A A R 
Published: June 2020

Abstract
Jombang Regency has critical land, especially in the north of the Berantas river due to a decrease in land quality including land, topography, climate, and water. This study aims to identify the structure of the fruit tree community in degraded land and the success of conservation from the cultivation of the surrounding community. The results of the study have identified 229 individuals from 21 species of fruit trees with 14 tribes on observation in 11 research sites. Analysis of fruit tree species abundance showed that longan and mango had the first and second-largest abundances with the relative abundance of 24.0% and 21.4%, respectively from the Sapindaceae and Anacardiaceae tribes. While the smallest relative species abundance is shown by melinjo with a value of 0.4%. Based on the analysis of the main components, it shows that the value of the longan and mango variance is quite high, indicated by the vector lines that move away from the centre, and while other species tend to gather at the centre because of the variance value is low. The grouping of individual fruit tree plants forms five groups and there are three species of fruit trees that are not included in the group because this species group has a fairly low AU / BP value of 51/10%, namely mango, guava, and star fruit. The results of this study indicate that the structure of fruit tree communities in degraded lands is more dominated by plants from the Sapindaceae and Anacardiaceae families which generally grow spread in 11 sample villages in the study area.
The development of student worksheet based on islamic values in the basic laws of chemical calculations
Authors: Mayasri A , Magfirah I , Nurbayani  , Utami W , Nasrudin D 
Published: June 2020

AbstractThe relationship between the basic values of the Quran in students life will be a reference to how students learn deeply and develop the knowledge gained. This was related to the core spiritual competencies that are expected to be possessed by students after completing one level of education in Aceh. The aim of this study was to produce student worksheets based on Islamic values in the Basic Laws of Chemical Calculation. Method of this research was R&D with the development model of ADDIE. The subjects of this study were students of class X IPA 3 of Inshafuddin Senior High School in Banda Aceh. Based on the results of the needs analysis, the students' worksheets based on Islamic values in the basic law of chemical calculations were needed. The results of the validation with an expert team that was equal to 89.4%, indicating that the student worksheets are possible to be tested. The positive responses of the questionnaire of students were obtained by 80.90%. Based on these results, it can be concluded that the development of students' worksheets was feasible.
The assessment of understanding biological concepts: a systematic review
Authors: Wulandari T , Ramli M , Muzzazinah  
Published: June 2020

Abstract
Assessment is one of the most important components in learning strategies are used to improve student learning and achievement check. The purpose of writing this article is used to determine the types of assessment on the understanding of the concept of biological material, material characteristics, and influences assessment of the understanding of biological concepts. This article discusses the 20 articles published in international journals from 2004 to 2019. The article analyzed the author obtained from database 6, which is Google Scholars, ScienceDirect, CBE, and Taylor & Francis. The analysis showed that the assessment is used to determine the understanding of biological concepts, are the concept of inventory, diagnostic tests, molecular and cell biology assessment, measuring of understanding macroevolution, genetic concept assessment, Gen-bio MAPS, biology core concept and multiple-choice instrument with a drawing activity. Forms of matter used in the form of multiple-choice, multiple-choice T / F, and an open-ended question. Topics to be used in the assessment of understanding the concept, are Plantae, genetics, molecular biology, evolution, microbiology, and photosynthesis. The assessment has used the positive and negative impact on the understanding of biological concepts.
Chemistry Acoustic (Chemcoustic): Android Based Application for Fun Chemistry Learning
Authors: Mugitsah A , Irwansyah F S , Subarkah C Z 
Published: June 2020

Abstract
Learning media are used to facilitate educational practices, both in terms of administration and as a tool in teaching and learning activities. Music and dynamic images are effective stimulants of the brain's work in developing eidetic intelligence, remembering visual information with high-level photographic accuracy. Making Chemcoustic application as audio visual media aims to develop students' learning abilities in understanding chemical concepts based on chemistry representations, by utilizing Android-based technology. The making of the application is carried out with the design stages of the application design in terms of the display, content, and lyrics of chemical songs, making music arrangements, song validation, application making, testing, and evaluation. The trial was conducted on 40 fresh graduated high school students using C1-C4 type test instruments in the form of pre-test and post-test. Based on the t-test quantitative analysis, the calculated t value is greater than the t table value, and the average gain score of the post-test (52.8975) is much greater than the average gain score pretest (15.68). Qualitative observation shows that learning using Chemcoustic applications is conducive, enthusiasm and activeness of students increases significantly. Chemcoutic application is effective as a medium of chemistry learning, as well as science learning that demands complex concepts with macroscopic, sub-microscopic, and symbolic representations.
The metacognition of elementary students in object change learning with SQ3R (Survey, Question, Read, Recite and Review)
Authors: Fadilah I N , Suratno  , Prastiti T D , Dafik  , Hobri  
Published: June 2020

Abstract
Implementing education highly important to be prioritized. The competitiveness field requires teachers to put an effort in designing learning activities that aligns the demands of society and the quality of education. This study uses a 4-D model development procedure that aims to produce worksheets in accordance with the SQ3R steps in learning objects changes. Students’ worksheet with SQ3R was conducted on students 5th grade in SDN 1 Mimbaan and SDN 2 Mimbaan. Measurement of metacognition skills was performed by using MAI (Metacognitive Awareness Inventory) questionnaire. Assessment of students' mastery of concepts was obtained through pre-test and post-test scores. The N-gain (g) of metacognition skills of SDN 1 Mimbaan students was 0.43 and the N-gain value (g) 0.53 of SDN 2 Mimbaan students indicated to the medium category. N-gain (g) of concept of SDN 1 Mimbaan students was 0.48 and the N-gain value (g) of SDN 2 Mimbaan students was 0.59 which also fell in the medium category. In conclusion, the worksheet has met the criteria of valid, practical, effective and in accordance with research objectives in empowering metacognition skills and mastery of elementary students' concepts.
The implementation of somatic, auditory, visualization, intellectually (SAVI) learning approach to improve students’ attention toward mathematics learning
Authors: Istiqomah A N , Kurniawati I , Wulandari A N 
Published: June 2020

Abstract
This research aims to describe the process of implementation Somatic, Auditory, Visualization, Intellectually (SAVI) learning approach to improve students’ attention toward mathematics lesson. The data were obtained from the result of questionnaire and observation. The success indicators in this research was the average of students’ attention reaching 70%. The results of this research showed that learning steps by using SAVI could improve students’ attention, the result as follows; 1) pre-activity: teacher delivered the purpose of the learning, apperception, and motivation. 2) main activity: the teacher explained learning materials, divided students into 4-5 persons to discuss the problem in a worksheet, the teacher guided students to solve the problem, gave chance to present the discussion result, then teacher held games that involve students’ sense tools as training for the learning materials. 3) post activity: the teacher together with students conclude the lesson and ask students to review the lesson at home. Based on the questionnaire result, the average of students’ attention in last cycle is 77,61%.
The effectiveness of implementation research-based learning model of teaching integrated with Cloud Classroom (CCR) to improving critical thinking skills in an astronomy course
Authors: Ridlo Z R , Dafik  , Nugroho C I W 
Published: June 2020

Abstract
The research aims to compares the modern class (experimental class) and traditional class with the traditional teaching style. Experiment class applies research-based learning methods integration with Cloud Classroom (CCR), and Traditional Classroom teaches with direct explanation and figure from the several textbooks of Astronomy. This research used triangulation methods. The quantitative methods were applied to analyze student achievement tests according to Critical thinking criteria. The qualitative method was applied using observation of student activity and interview for the selected student. Student achievement test followed by pretest, and post-test quasi-experimental research. The data analysis of the post-test indicated a value of sig (2-tailed) 0.002 where p≤0.05, which implied the student achievement on critical thinking skills criteria in the experimental class was better than that in the control class. The activity of students in the experimental class reached 49% as the highest activity for very active activity, 23% active, hesitate 14%, inactive 7%, and very inactive 7%. Based on this result, the implementation of research-based learning integrated with CCR is proven effective in improving student critical thinking skills Astronomy course.
Developing mathematical reasoning problems type two-tier multiple choice for junior high school students based on ethnomathematics of jember fashion carnaval
Authors: Ambarwati R , Sunardi  , Yudianto E , Murtikusuma R P , Safrida L N 
Published: June 2020

Abstract
Reasoning is the foundation of learning mathematics. If students' mathematical reasoning abilities are not well-constructed, students who learn mathematics will consider these abilities only as material based on a series of procedures and imitate examples without knowing their meanings. The purpose of this research is to produce an effective product used in the classroom learning process, in this case, Web-Based Two-Tier Multiple-Choice questions. The TTMC questions to be used are specified to the mathematical problems of two-variable linear equations with complex mathematical situations for concluding. At the first tier of the TTMC, students are asked to choose answers to questions related to the context being discussed, in this case, the SPLDV concept, while at the second tier, students choose the reasons from the answers they have chosen at the first-tier questions. At the first tier, students are expected to use their understanding in solving various problems, while the second tier is more appropriate to be used as a benchmark for the extent of student reasoning in solving problems at the first tier. Utilization of the JFC cultural festival as a context in learning mathematics based on ethnomathematics is expected to help students in Jember and its surrounding areas to obtain an optimal understanding of mathematical concepts because culture plays an important role to be integrated into mathematics learning. This research is categorized as valid (3.85 out of 4.00) based on the assessment from the validators. The problem of two-tier multiple-choice mathematical reasoning in this study is categorized practical (90.3%) based on observation on teacher activities and suggestions from practitioners. The problem of two-tier multiple-choice mathematical reasoning in this study is categorized effective based on student test results (77.27%), observation on student activities (88.02%), and student response results (84.5%).
Development of remedial mathematics learning based on lesson study for learning community against students' problem solving analysis capabilities
Authors: Purwandi D , Susanto  , Hobri  
Published: June 2020

Abstract
This study aims to develop remedial mathematics learning tools based on Lesson Study for Learning Community (LSLC). This research uses a mixed method that combines two previous forms of research, namely research and development and experimental research. The subjects of the research were grade VII students. This type of research is a step of research by combining two forms of research that have been there before, namely the development of research and experimental research. The learning instruments developed in this study were on the material for the addition and subtraction of integer in grade VII SMP including Learning Implementation Plan, Student Worksheet, and Learning Outcomes Test. After obtaining a valid, practical, and effective device, the device is then tested in the experimental class to find out whether there is an effect on students problem solving abilities. homogeneity test shows the value of sigh. 0.671 on the pre test and 0.450 in the post test so that it can be concluded that the assumption of homogeneity of variance is fulfilled. Based on the results of the validity, effectiveness, and practicality test, the researcher concluded that the learning platform through bridge games and Lesson Study for Learning Community (LSLC) is a valid, effective, and practical device. At the time of the field trial research was also carried out. From the results of the test differences in problem solving in the two classes using the Mann Whitney Test shows the value of sighing. 0,000 (p<0.05), so it can be concluded that there are differences in problem solving between the control class using conventional instruction and the experimental class using Lesson Study for Learning Community (LSLC) based remedial learning with significant results so that when compared with conventional methods this device gets higher results than in students who use conventional methods.
Biotechnology concept: questioning of analysis with lesson study for learning community (LSLC) for higher ordered thinking skill on coffee area plantation
Authors: Suratno  , Komaria N , Hobri  , Husniah F , Novenda I L , Fahroyin M 
Published: June 2020

Abstract
Students often have difficulty when completing analysis level questions. An important strategy used in learning is through lesson study to improve students' weak points. The purpose of this study is to describe the ability of students to solve problem analysis problems with the lesson study for learning community. The research methods used were tests, observations, and interviews. The research subjects consisted of 36 high school students in Biology subject to the concept of Biotechnology material. The concept of Biotechnology material includes the concept of basic of Biotechnology, mechanism of Biotechnology, concept traditional Biotechnology, and advance Biotechnology. Components of analytical problems that students solve include the analysis of the elements or elements of the concept of learning material, the relationship between parts of the concept of learning material, and the organization between the concepts of learning material for Biotechnology material. This research is a descriptive study. Analysis of students' ability to solve analytical problems is done through video tests and analytical methods. The results showed that students' ability to analyze questions with lesson study for learning community on high, medium and low abilities was different
Analysis of difficulties in solving mathematical problems categorized higher order thinking skills (HOTS) on the subject of rank and shape of the root according to polya stages
Authors: Ernawati  , Sutiarso S 
Published: June 2020

Abstract
Destination of this research is to identify difficulties faced by the students in solving mathematical problems HOTS categorized on the subject of rank and shape of the root. This research was classified as descriptive research with a qualitative oncoming. In this study, researc subjects numbered 115 students, after going through data reduction, the data focused on 4 students representing high, medium, and low abilities, to precede the process of looking deeper into the process of working on problems based on Polya's stages. Data collection techniques in this study were observation, tests, and interview. In this study, the authors used persistence observation techniques and data triangulation. Based the results and discussion of study showed so as 62.54% of students had difficulty understanding the problem, 70.62% of students had difficulty thinking of a plan, 79.68% of students had difficulty implementing the plan, and 87.16% of students had difficulty reviewing. Difficulty factors in solving mathematical problems categorized HOTS on the theory of rank and shape of the root is students do not understand what is called a problem, students aren’t able absorb information properly, weaknesses prerequisite concepts owned by the student, the student aren't careful and thorough the process, lack experience students working on math problems categorized HOTS, and lack student experience in working on story problems.