bluuebunny/crossref_metadata_2025 huggingface dataset:
Critical thinking skills based on mathematical dispositions in problem-based learning
Authors: Susilo B E , Darhim D , Prabawanto S
Published: July 2020

This study aimed to describe students’ critical thinking skills based on mathematical dispositions in Problem-based Learning. This study used descriptive exploratory methods with instruments: test, scale, observation, and documentation. Data was taken from 39 undergraduate students from the mathematics education study program at a university in Central Java. The indicators of critical thinking skills used were abilities in analyzing problems, concluding and giving explanation, evaluating, and choosing problem-solving strategies. The results showed that: (1) there are no students in the negative mathematics disposition group, (2) the enhancement of students’ critical thinking skills in Problem-based Learning belongs to the medium category; (3) students in the low positive mathematical disposition group have marginally adequate abilities in analyzing, explaining, and choosing strategies, and adequate abilities in evaluating; (4) students in the moderate positive mathematical disposition group have adequate abilities in explaining, good abilities in analyzing and choosing strategies, and excellent abilities in evaluating; and (5) students in the high positive mathematical disposition group have good abilities in explaining and choosing strategies, excellent abilities in evaluating and analyzing. There was a trend of increasing the achievement of indicators of critical thinking skills based on mathematical disposition in Problem Based Learning.
Designing augmented reality-based mathematics mobile apps for outdoor mathematics learning
Authors: Ahsan M G K , Miftahudin  , Cahyono A N
Published: July 2020

Augmented reality, one of the current technologies, can make a virtual object on the real-life environment, and it is suitable for the space geometry learning. The purpose of this research is to design an Augmented Reality-based mathematics mobile phone application for outdoor mathematics learning about space geometry. This study used a design research method consisting of the design and implementation stages. The focus of this paper was on the designing stage. The Preliminary analysis in school showed that mathematics learning used instructional media frequently, and the school environment had some real-life objects similar to the space geometry objects. The app design of the user interface was made in order to make it easy to use, the 3D model was designed according to the scientific learning to help students to illustrate mathematically the real problems faced. The outdoor mathematics learning was designed by making some exercises that used the objects around the school. The results of the feasibility test of the product indicated that the application was suitable for the use in outdoor mathematics learning in schools.
Students’ mathematical communication ability in the ethnomathematical arias model
Authors: Rochmad  , Dewi (Nino Adhi) N R , Noviyana I N
Published: July 2020

This research is motivated by the low mathematical-communication-ability of junior high school students. This study aims to determine whether the use of the ethnomathematical ARIAS-model is effective in mathematical-communication-ability. The study design was a pretest-posttest-control-group-design. The population in this study were eighth grade students of SMP Negeri 1 Karangampel Indramayu. The research sample consisted of 57 students (27 students in the experimental class and 30 students in the control class). Data collection techniques using pretest and posttest; pretest to know students ‘initial mathematical-communication-ability before and posttest to find out students’ last mathematical-communication-ability after teaching and learning. Early mathematical-communication-ability was also used to determine the normality and homogeneity of the experimental and control class. Data were analyzed using parametric analysis of mean test, proportion test, average difference test, proportion difference test, and gain difference test. The results of this study indicate that the ARIAS-model with ethnomathematics nuances is better than problem-based learning in mathematical-communication-ability.
Gender perspectives on mathematical connection ability in PACE learning model
Authors: Dewi N R , Mulyono  , Pratama M F R , Amidi  , Azmi K U , Munahefi D N
Published: July 2020

The purpose of this research was to proving effectiveness PACE learning model and analyze the ability of students’ mathematical connections in terms of gender. This type of research is mixed methods. The quantitative research design used is true experimental design. This research was conducted in one of the High Schools in Banyumas in the academic year 2018/2019. Two sample groups (experiment group and control group) were selected randomly. An experiment group was taught by using PACE learning model, while the other group (control group) was taught by using Problem Based Learning Model. The purposive sampling technique consists of 6 subjects were chosen, 3 male and 3 female students. Data collection techniques through tests and interviews. Data analysis through the stages of data reduction, data presentation and drawing conclusions. The results showed that female subjects fulfilled indicators of the relationship between topics in mathematics and indicators of mathematical relationships in other fields, as well as indicators of mathematical relationships in everyday life one subject did not fulfill; male subjects meet indicators of the relationship between topics in mathematics and indicators of mathematical relationships in everyday life, as well as indicators that connect mathematics in other fields that are not fulfilled by one subject
Learning mathematics assisted by adobe flash software to improve mathematical reasoning ability students ongeometry concepts
Authors: Nurjanah  , Yuliardi R , Luthfi A F
Published: July 2020

This research is motivated by the very importance of integrating technological innovation in learning. This research aims to develop interactive learning based on Adobe Flash CS6 in order to improve students’ mathematical reasoning abilities. The method used in this study is the Research and Development (R&D) method with steps (1) self-evaluation, (2) prototyping (expert judgment review, one-to-one, and small group), and (3) fieldtest. The population in this study was grade VII students of SMPN 2 Luragung and SMPN 1 Maleber, Kuningan District, West Java. Samples were selected through a purposed random sampling technique. The experimental class was taught using adobe Flash-based interactive learning media, while the control class was taught using classical learning. Data obtained by using the pre-test and post-test to get data on the results of increasing students’ mathematical reasoning abilities. Based on the results of data analysis, it is obtained: The development of adobe flash-based mathematics learning media has fulfilled the effective and valid criteria as suitable learning media applied in improving students’ mathematical reasoning abilities. Based on field tests there is a significant increase in the average between students who use Adobe Flash media and those who do not use. In other word Adobe Flash based learning media can effectively improve students’ reasoning abilities in geometrical concepts.
Etnomathematics of batik motifs in problem based learning
Authors: Zaenuri  , Purwanti D , Asikin M
Published: July 2020

This research aims to analyze effectiveness of ethnomathematics with Solotigo Batik Motifs in Problem Based Learning model. This true experimental research desin used cluster random sampling to take the sample. The sample was taken from SD N Siderejo Lor 07, Salatiga, as experimental class and SD N Sidorejo Lor 03 Salatia as control group consisted of 74 students. The data collecting techniques were observation, documentation, and test. The data was analyzed by One Sample T – Test, proportion test, and Independent Sample t-test. The findings showed that ethnomatematics with Salatiga batik motifs in problem based learning model was effective. It was shown by (1) the average ethnomatematics with Salatiga batik motifs in PBL model was higher than 75.0. (2) the proportion of passing grade by using ethnomatematics with Salatiga batik motifs in PBL model could achieve classical passing grade, 75%. (3) The average of ethnomatematics with the batik motifs in PBL was higher than PBL model. (4) the average of variance by using ethnomatematics with Salatiga batik motifs in PBL was higher than PBL model. It could be concluded that ethnomatematics with Salatiga batik motifs in PBL model was effective.
Implementation of APOS theory to encourage reflective abstraction on Riemann Sum
Authors: Nisa LC , Waluya SB , Kartono  , Mariani S
Published: July 2020

The purpose of this study is to explore the implementation of APOS (Action-Process-Object-Schema) in first-year students at higher education as a basis of instructional learning in Riemann Sum to emerge the reflective abstraction. This is qualitative research, and data were taken by tests, interviews, and observation. To construct the Riemann Sum understanding, students came through the Action by estimating the area under the curve with various shapes, looking for the area under the curve through several partitions, and make repetitions. The Process was built by interiorizing the previous action onnpartitions. The Object was constructed through the encapsulation mechanism by determining the existence and value of the limit for the Riemann Sum. Schemes occurred through thematization by applying Riemann Sum to contextual situations involving functions of distance and time. The results showed that the success of APOS implementation was determined by genetic decomposition, assistance, reinforcement of preconditions and reinforcement of concepts by lecturers. Some effective scaffoldings to help the construction of reflective abstractions in Riemann Sum are worksheets and guided question from educator.
An analysis of student error types in solving mathematics problem on the implementation of osborn simple feedback learning model
Authors: Kartono  , Muttaqi U K , Dwidayati N K
Published: July 2020

This research aimed to find out effectiveness of Osborn Simple Feedback learning model implementation in solving mathematics problem and to analyse the error types of the students. This mix method research combined two approaches, by having sequential explanatory design (based on quantitative – qualitative orders). The population consisted of VIII graders of MTs Al – Ma’arif Rakit in academic year 2018/2019. The quantitative research side, the sample was collected through random sampling and it was gained two classes with significantly different initial problem solving. The quantitative data analysis was based on one sample t test, proportional test, and average variances of two independent sample test. The qualitative aspect of this study was done by taking the subjects based on purposive sampling. 6 students of experimental group were chosen based on their problem solving skill started from high, moderate, and poor categories. Based on qualitative analysis, it could be concluded that problem solving skill of the students was varied. It depended on the error types. The findings also showed that the implementation of Osborn Simple Feedback model was effective to problem solving skill of the students. The mathematics problem solving skill of the students on each category and research subject was varied.
Development of m-learning for basic education subject in the teacher training institute
Authors: Hardyanto W , Ahmadi F , Sariyasa S , Syahputra H , Pramono M , Parinsi M T , Purwinarko A
Published: July 2020

In recent decades, ownership of mobile devices has increased. The increasing number of people who own and use mobile devices opens up opportunities for the use of mobile technology in the world of education, one of which is the utilization of mobile learning (m-learning) devices. M-learning is intended to complement existing learning and provide opportunities for students to re-learn material that is not mastered anywhere and anytime. This certainly can provide a different experience in the learning process for students, development of mobile learning as an alternative learning media that is most appropriate and effective today. Development of m-learning using the prototyping method so that developers and users can interact with each other during the process of making an application, and users can evaluate the app directly. This mobile learning will be used to support basic education subjects in Teacher Training Institute.
Artificial neural network model for banckrupty prediction
Authors: Prasetiyo B , Alamsyah  , Muslim M A , Subhan  , Baroroh N
Published: July 2020

Bankruptcy is a financial failure in a business where the company fails to generate profits and cannot pay its debts. The impact of bankruptcy is very large for the organization and can be felt by the whole community. Thus, the prediction of a company’s financial failure is absolutely necessary to prevent bankruptcy. Prediction can be done with data mining, one of the methods is to use a network model. This study was to obtain the results of the classification of types of companies that went bankrupt and get the performance of the algorithm used. The results obtained are with an accuracy of class recal 99.30% (trueNB) dan 99.07% (trueB). Sedangkan class precision 99.30% (predNB) dan 99.07% (pred.B). Hasil evaluasi kinerja algoritma Naïve Bayesian Classifier pada penelitian ini menunjukkan tingkat akurasi yang cukup tinggi yaitu 99.20%.
Enhancement security AES algorithm using a modification of transformation ShiftRows and dynamic S-box
Authors: Alamsyah  , Prasetiyo B , Ardian M N
Published: July 2020

AES algorithm is a popular encryption algorithm and has a strong resistance to a variety of attacks, especially linear and differential attacks. However, it is necessary to modify the algorithm to improve the performance of the AES algorithm so that the encryption produced (ciphertext) is more resistant from various types of attacks. In this paper, the increased strength of encryption in the AES algorithm uses a modified ShiftRows transformation and dynamic S-box. Modifications to the transformation of ShiftRows are used to simplify the encryption process, while dynamic S-box is used to randomize S-box. The data used in this paper are image data sets. The results of image encryption were tested using histogram analysis, correlation analysis, information entropy, and sensitivity analysis. Based on the test results obtained the ideal range value is 26.76114. This value is better than the results of previous studies.
UNNES MOOCs: What strengths does the University have and the society needs?
Authors: Cahyono A N , Munawar A
Published: July 2020

The aim of the study reported upon in this paper is to design the Massive Open Online Courses (MOOCs) of Universitas Negeri Semarang (UNNES). An explorative design study was carried out in two main stages, namely the design phase and the implementation phase. The focus of this paper is on the first phase. Preliminary analysis is carried out with discussions and surveys to find out what UNNES is leading and what is the current needs of the society. The findings indicate that UNNES has strengths that are appropriate to the needs of the society, such as (environmental and cultural) conservation, education, and information technology. Based on the procedure specifications and criteria, five online course modules have been created. The results of the review state that the modules are appropriate to be used nationally and can be offered to the public through a national online learning system (SPADA) managed by the Ministry of Research, Technology, and Higher Education of RI. Regulations are established and the system was also designed through this research for the implementation of cross-institutional lectures with credit transfer schemes. The results can become masters in further development and become Academic Document as a recommendation for issuing regulations at universities.
Facial recognition using two-dimensional principal component analysis and k-nearest neighbor: a case analysis of facial images
Authors: Sugiharti E , Putra A T , Subhan
Published: July 2020

Science and Technology Innovation in Computer Science, especially in the facial image is increasingly needed in the Industrial Era of 4.0. The problem: How to use the working pattern of the Two-Dimensional Principal Component Analysis (2DPCA) method that integrated with K-Nearest Neighbors (KNN) in the Facial Image Recognition for various purposes? The purpose of this study, to analyze the Facial Image Recognition based on the method of Two-Dimensional Principal Component Analysis (2DPCA) which is integrated with KNN. This research uses the method of Two-Dimensional Principal Component Analysis (2DPCA) for the feature extraction process and the KNN classification method is applied to perform the data classification process so that the desired accuracy value is obtained. Research subjects use the image database from UCI repository, consists of 190 black and white face images of people taken with varying pose (straight, left, right, up), expression (neutral, happy, sad, angry), and size. The result of this study is the performance analysis of Facial Image Recognition based on the method of Two-Dimensional Principal Component Analysis (2DPCA) that is integrated with k-Nearest Neighbors (KNN).
Mapping the use of expert system as a form of cloud-based digital forensics development
Authors: Ramadhani E , Mulyati S
Published: July 2020

This paper discusses mapping of the use of expert systems for the development of cloud-based digital forensics. Mapping is done to answer the challenges in the development of the amount of data and the types of evidence currently that can affect the process of investigating forensics. The mapping is according to several categories, namely, tools, methods, ontology, and framework. The result is an expert system capable of providing automation to the investigation process, accelerating system performance, becoming a guideline for experts, as a means for investigators, and to get a system that can adapt to the framework.
The characteristics of bamboo image extraction as an environmentally friendly material
Authors: Latifah K , Rochim A , Siswanto J , Supriyadi B
Published: July 2020

Bamboo is an environmentally friendly material. Various types of bamboos thrive in Indonesia. To differentiate good types of bamboos, this study uses the K-Means color segmentation method and shape measurement. Due to bamboo has fibers content and fibers adhesive which reflected the quality of bamboo. Then the research uses the morphological parameters of area and perimeter as a feature of size. The analysis is carried out on 45 bamboo images, namely 15 Wulung bamboo images, 15 Petung bamboo images and 15 Ori bamboo images. Based on the test results obtained, there are as many as 0.6 accurate images. The testing uses 15 types of bamboo imagery. The bamboo which has the largest fiber size is Wulung bamboo and then followed by Petung bamboo and the smallest is Ori bamboo.
Development of information systems for academic final projects documentation
Authors: Purwinarko A , Zaenuri  , Handoyo M Z E
Published: July 2020

This study aims to develop a website-based student final project guidance application at Universitas Negeri Semarang. This research is a development study with a waterfall model. The results of this study can facilitate students to communicate and consult about theses, both in the form of thesis drafts and the products they will make. With the application of thesis counseling information systems, thesis, and online dissertations, the process of preparing the final project will be more optimal and minimize the use of paper.
Software development internal audit quality with ISO 9001
Authors: Efrilianda DA , Muslim MA , Putra AT , Purwinarko A
Published: July 2020

Quality management is a common problem in the business processes of the organization. University competition has increased. This is caused by globalization are increasingly cracking to compete among states. Assessment of good quality management and international standards using ISO 9001. This study discusses the maturity level ratings by using the ISO 9001 Quality Management System to see the maturity level of quality management in the organization. Quality management is using PHP programming. Data input used primary data and secondary data obtained by observation. The process gets a level of maturity is done by using the ISO 9001 to see the maturity level of quality management, GAP analysis to see the current conditions, and the conditions that will come to get a recommendation. This research concluded that the whole process of quality assurance at the organization still not profit and concluded that quality assurance for improvement still needs to be done on the entire information system is running. This indicates that ISO 9001 is good enough to use to assess the maturity level of quality management.
Automated vending machine with IoT infrastructure for smart factory application
Authors: Wiyanti DT , Alim MN
Published: July 2020

Vending Machine (VM) is a beverage that can operate in a standalone manner to serve beverage or snack purchase transactions. VM technology, especially in the development of the Internet and smart business, has progressed and easier for users, in this case, the seller, the buyer, and the developers. The Internet of Things (IoT) is a new technology paradigm envisioned as a global network of machines and devices capable of interacting with each other. The IoT is recognized as one of the most important areas of future technology and is gaining vast attention from a wide range of industries. The true value of the IoT for enterprises can be fully realized when connected devices can communicate with each other and integrate with vendor-managed inventory systems, customer support systems, business intelligence applications, and business analytics. This article offers a conceptual VM, the system design using e-money payment and online information management. Major components of the machine are, a scanner to take the input from users, large storage space to store the beverages and snacks, sensors to detect the motion, inventory monitoring system to keep track of the storage, and an inventory monitoring system.
Effect of Trichoderma sp. secondary metabolite on the increase in leaf number of coconut plant
Authors: Indriyanti D R , Rahmawati R , Widiatningrum T , Purwantoyo E
Published: July 2020

Objectives of this study was to analyze the increase in the leaf number of coconut palm due to the application of solution containing secondary metabolite of Trichoderma sp. Twenty plant samples were divided into 2 groups, 10 plants with 1800 cc of Trichoderma sp. secondary metabolite (treatment) and 10 plants without the application that secondary metabolite (control). The average age of plants used was 5 years. Results of this study showed that there was a tendency of increased leaf number in plants with the application of secondary metabolite of Trichoderma sp. The increase of leaf number of treatment group was 3-6 leaves, while in the control group it was only 3-4 leaves in 6 months.
Hatchability genotype of Central Javanese local ducks based on ovomucoid gene
Authors: Susanti R , Yuniastuti A
Published: July 2020

Ovomucoid genes are related to hatchability of duck eggs. The study would analyze the genotype of local duck hatchability of Central Java based on ovomucoid genes by the PCR-RFLP. This research is an exploratory study using 35 samples of local Central Java duck. Central Java local duck hatching genotypes were detected by ovomucoid genes fragment cutting as a result of PCR amplification using ApoI restriction enzymes. DNA isolated from duck feathers using the gSYNC ™ DNA Extraction Kit. Amplification ovomucoid gene was done by PCR using TovF2 and TovR2 primers. The results showed that entire samples were genotyped +/+ (high hatchability), because they were not cut off by the ApoI restriction enzyme. The results of nucleotide sequences showed that Central Java local ducks had no cutting site for the ApoI enzyme (5’-AAATTC-3’), because there were mutations in the nucleotides to A577G and A579C and no nucleotide deletions to 576-578. It was concluded that based on ovomucoid genes, all Central Java local duck samples were genotypes with high hatchability (genotype +/+). This previous research, strengthens previous argument that local Central Java ducks need to be maintained or preserved as laying ducks with high hatchability.
Phytoremediation of lead-contaminated soil by ornament plant Codiaeum variegatum
Authors: Herlina L , Purnaweni H , Sudarno S , Widianarko B , Sunoko H R
Published: July 2020

Phytoremediation is an emerging technology that employs the use of higher plants for the clean upt he contaminated environment, a cost-effective, environment-friendly. In this study, the role of puring(Codiaeumvarigatum) plants as a potential phytoremediator to soils contaminated with lead (Pb) was investigated. A pot experiment was conducted for four and eight weeks to compare the biomass andlead content in root, stem and leaf by puring. The plant grew well exposed Plants that grow well are exposed to Pb with as much as 250 mg.kg−1 and 375 mg.kg−1 soil. The result presented here showed that root, stem and leaf biomassdecrease with increasing concentration and exposure time. Pb accumulation increases with increasing concentration and time of exposure. Pb accumulation in roots> stems> leaves. Bioaccumulation of factors is less than 1 while factor translocation is more than one. Metal tolerance index values range 95.545%to103.406%. This suggests that Codiaeumvarigatum was a candidate for phytoremediation of lead
Analysis of amino acids in Macrotermes gilvus Hagen termite colonies (Blattodea: Termitidae)
Authors: Subekti N , Indrawati P
Published: July 2020

Sources of nutrients, especially essential amino acids that can not be produced by the body are needed. Several types of termites have been consumed by the community, one of which is Macrotermes gilvus. The purpose of this study was to analyze amino acids in Macrotermes gilvus soil termite colonies. The instrument used for analysis was High Pressure Liquid Chromatography (HPLC). The results showed that most amino acids originated from the neotene Macrotermes gilvus compared to the queen and king. The termite queen has a higher amino acid content than the king. The dominant amino acid in queens, kings and neotenes is serine, while the very limited amino acid is methionine. Based on this, Macrotermes gilvus soil termite colonies can be used as an alternative source of protein that rice of essential amino acid.
The Study of community knowledge on biodiversity in Mount Ungaran
Authors: Rahayuningsih M , Priyono A B P , Widjanarko A , Ayu G
Published: July 2020

Mount Ungaran has abundant of biodiversity potential on the remaining natural forest including flora and fauna. The objective of this research was to know the community knowledge on biodiversity in Mount Ungaran for support biodiversity conservation. The study was conducted on May-August 2019 in two villages, Ngesrepbalong and Banyuwindu, Preliminary data collection included 6 (six) components and 61 person had been interview as a informants. The results were analyzed quantitatively and qualitative description. The results of preliminary research from interviews and Googleforms showed that taxa were the best known to successive respondents sequently : flora (100%), butterfly (98,41%), bird (96.83%), mammal (93,65), dragonfly (90.48%), frog/toads (82.53%), and reptile (73.02%). These results indicate that the flora group is easily recognized by the respondents, while the reptiles are a less well-known group. Many flora groups are well-known because the flora is widely used by people such as the species of pine, orchid, and fern. Nevertheless, more than 70% of respondents apparently did not know that of the several species (47 species) were protected species. Respondents only know 6 (six) protected species and especially from fauna groups, including javanese hawk eagles, whreated hornbill, langurs, porcupines, anteaters, and python.
The effectiveness of the Macrotermes gilvus termite queen for sperm repair in infertile mice
Authors: Indrawati P , Subekti N
Published: July 2020

Handling infertility health problems can be done by improving sperm quality. This study aims to analyze the effectiveness ofMacrotermes gilvusstermite queen in improving sperm quality in infertile mice due to lead contamination. This study used a post-test only control group design with 6 groups, each group contain 4 termites. Test animals were given lead acetate of 8 mg / kg BW orally for 14 days, then the treatment group was given the termite queenMacrotermes gilvuss, respectively 50, 100, and 200 mg / kg BW for 21 days. Test animals were dissected, then sperm were taken to be analyzed for quality based on concentration, motility, morphology, and sperm viability. Data were analyzed using Oneway ANOVA with LSD test. The results showed the termite queenM. gilvuswas effective in repairing sperm based on concentration, motility, morphology, and viability. However, lead did not succeed in damaging the morphology of the sperm so that the administration of the termite queenM. gilvusdid not have a significant effect. The termite queenM. gilvuscan be an alternative ingredient to improve sperm quality.
Comparative study of collembola community on burnt forest areas and unburn forest areas in ijen crater nature park Banyuwangi
Authors: Suhadi  , Dharmawan A , Sakdiyah W , Ashoffi A M
Published: July 2020

Forest fire is one of the most crucial environmental and forestry issues in Indonesia. Forest fires are also frequent in the Ijen Crater Nature Park. Forest fires cause loss of filter and humus which is source of food for soil animals. One of the soil animals that inhabit litter and soil is Collembola. This study aims to compare Collembola community in bunt and unburnt areas of Ijen Crater Nature Park. As well as to know the relation of abiotic factors with diversity, evennes, and richness of Collembola in burnt and unburnt areas. This research is a descriptive explorative research. Data retrieval is done with line transect method. The result showed that Collembola index value on burnt and unburnt areas are significantly different. The dominant species in the burnt area is Onychiurus sp, whereas in the unburnt area isIsotomurussp. The result of abiotic factor regression analysis showed that temperature, humidity and pH level have relation to index of Collembolas diversity, evenness and richness.
Insecticidal activity of some plant essential oil extracts against Alphitobius diaperinus pest causing Avian influenza
Authors: Subekti N , Cahyaningrum S H
Published: July 2020

Alphitobius diaperinusis a type of pest insects found in animal feed and chicken manure that the direct contact with chickens causes this pest to be used as a vector for various pathogens like Avian influenza virus. Alphitobius diaperinus control which still using chemical pesticides is dangerous for health and the environment. The study aims to examine the insecticidal activity of some plant essential oil extracts (Mentha piperita, Syzygium aromaticum, Melaleuca leucadendra and Cymbopogon citratus) against Alphitobius diaperinus. Test insects used were adult Alphitobius diaperinus propagated in the laboratory. Tests carried out are insecticidal tests. Observations were made every hour after treatment for seven days. The two-way ANOVA with the Tukey follow-up test were employed to analyze the data. The results revealed that Mentha piperita at the ninth hour and Syzygium aromaticum at the 10 hour showed against Alphitobius diaperinus insecticidal properties. Whereas Cymbopogon citratus and Melaleuca leucadendra did not give a mortality effect for four days. Thus, Mentha piperita and Syzygium aromaticum essential oil extracts can be an environmentally friendly natural pest control for Alphitobius diaperinus.
Lipid profile comparison of tomato extract and atorvastatin supplementation in atherosclerosis rats
Authors: Iswari R S , Dafip M , Kartika A I , Apriliana I R , Chamidah I N , Abduh M
Published: July 2020

The use of synthetic drugs, such as atorvastatin and simvastatin, often cause health problems caused by side effects. Tomatoes are a food source that contains antioxidants such as vitamins A, C and E in high amounts and increase because of the processing. The nutritional content of tomatoes in preventing hypercholesterolemia arising from oxidative stress as a result of accumulation of LDL-cholesterol in the endothelium. Therefore, this study considers steamed tomatoes in overcoming the condition of hypercholesterolemia. The study design uses the Post Test Randomized Control Group Design. Before being given as many as 24 white rats that were made hypercholesterolemia, then divided into 4 groups, namely K1 (negative control group), K2 (atherosclerosis rat control group), K3 (atherosclerosis group called atorvastatin), K4 (atherosclerosis group supplemented with 16 mg / tail / day). ANOVA-LSD test results showed the differences shown (p <0.05) between the control group (K) and the consultation group (K3 and K4).
In vitro culture of local isolate Semarang entomopathogenic Nematodes on insect powder media
Authors: Widiyaningrum P , Priyono B , Subekti N. , Adzikri F I , Khasanah M
Published: July 2020

This research aims to analyze the population of EPNs isolate of Semarang cultivated in liquid media containing cricket (Gryllus bimaculatus) and mealworm (Tenebrio molitor) powder. Each treatment combination (doses of powder 0.5; 1.0; 1.5 and 2.0 g) was replicated five times. Each investing 1000 infective juveniles at the first breeding. The EPNs population was calculated every week for 4 weeks. The data were analyzed by ANOVA, followed by Tukey’s test. The results showed EPNs isolate Semarang be able to reproduce in the liquid media with cricket and mealworm powder. The difference between insects had no significant effect on the EPNs population, but the dose of powder influenced significantly (α <0.05). The EPNs population on 2nd week showed no difference between control media, 0.5 g, and 1.0 g media, while doses of 1.5 and 2 g are significant. This study concluded that cricket and mealworm powder are effective as EPNs culture media replacing the in vivo method. The optimum doses in this study were 0.5 g insect powder, and harvesting is suggested to be conducted during the second week. This result can be an alternative to the mass cultivation of EPNs to the development of local bioinsecticides.
Process design for bioconversion of cassava stalk through solid substrate fermentation
Authors: Dewi P , Indrati R , Millati R , Sardjono
Published: July 2020

Cassava stalks are by products from cassava tuber production. Cassava stalks is lignocellulosic material (LM) which is composed by lignin, hemicelullose, and cellulose. Utilization of LM optimally will push a beneficial effort in producing sugar. The presence of lignin can limit the effort to convert cassava stalks into sugar. The lignin have to be reduced. Its introduced solid substrate fermentation (SSF) technique by using molds to optimize utilization of cassava stalks. Molds can produce enzyme for converting LM into sugar. There is no enough information of design process of solid state fermentation for cassava stalks bioconversion, starting from selection of suitable microorganism used, substrate suitability testing, lignin reducing pretreatment, design of fermentor, and the needed of aeration for optimizing molds growth. Based on research result, a process for bioconversion of cassava stalks into sugar through SSF techniques was defined as follow: Microorganism suitable used isAspergillus niger, cassava stalks suitable as a growth media for mold as a physical support (DMC = 93, 76 %) and source of nutrient (C/N 19, 92), physical pretreatment by reduce the particle size was more suitable than alkaline pretreatment for lignin reduction, and the best fermentor is unforced aeration closed chamber at big capacity.
Bioactive compounds from callus culture of Elaeocarpus grandiflorus
Authors: Habibah N A , Nugrahaningsih WH , Musafa F , Rostriana Y , Mukhtar K , Wijawati N , Anggraito Y U
Published: July 2020

E. grandiflorus has potential as a source of bioactive compounds. This study aims to analyze the content of flavonoid and phenolic bioactive compounds in the callus culture of E. grandiflorus in various concentrations of PGR. Callus culture induction was carried out by maintaining E. grandiflorus leaf stalk explants on solid Murashige & Skoog (MS) with the addition of growth regulators namely 2,4-dichlorophenoxyacetic acid (2,4-D) and picloram in different concentrations. The results of the study showed that callus maintained on MS medium with the addition of 2,4-D and picloram could produce flavonoids and phenolics. Flavonoid and phenolic concentrations produced in each treatment varied. Overall, it can be concluded that the MS medium with additional growth regulators, 2,4-dichlorophenoxyacetic acid (2,4-D) or picloram can be used for bioactive compound production of callus Elaeocarpus grandiflorus.
The use of two pairs primer for CO1 gene amplification on traded stingray at fish auction Tasik Agung Rembang
Authors: Setiati N , Partaya  , Hidayah N
Published: July 2020

Stingray provide a high economic contribution and increase in production and utilization. Conservation effort needed to identify molecularly using CO1 gene. The success of CO1 gene in identifying species can not be separated from amplification in polymerase chain reaction (PCR) technique. The use of primer FishF1, FishR1, FishF2, and FishR2 to amplify COI gene for stingray traded at fish auction Tasik Agung Rembang never been done, so it need to be researched. The purpose of this study is to amplify the COI gene of stingray traded at fish auction Tasik Agung Rembang using two pairs of primers. Five stingrays sample were obtained from fish auction Tasik Agung Rembang. Then its DNA was isolated using protocol from TIANamp Marine Animals DNA Kit and measured in quantity using nano spectrophotometer. Amplification of CO1 gene by PCR technique. Based on the results of the study showed that the five samples had good DNA purity, concentration, and quality. The 5 samples amplification result showed that the FishF1-FishR1 primer pair succeeded in amplifying samples a, b, d, and e, while the FishF2-FishR2 primer pair succeeded in amplifying samples b, c, d, and e with a PCR product length around 655 bp.
The use of eggshell powder as calcium source in stabilizing expansive soil using Bacillus subtilis
Authors: Sugata M , Widjajakusuma J , Augestasia A , Zacharia A , Tan T J
Published: July 2020

Expansive soils are commonly characterized by low strength and high swelling potential. Thus, to use this type of soil as foundation, stabilization process is needed. This research aimed to improve the stability of expansive soils by using Bacillus subtilis. The bacteria have been reported for its ability to form calcium carbonate precipitation which could bind soils particles, hence, increase the soil strength. In this study, the bacteria were grown in medium containing eggshell as calcium source. Then, the bacterial liquid culture was injected into expansive soil samples, followed by curing period of 30, 60 and 90 days. The swelling potential of the stabilized soil samples were evaluated with free swell index (FSI) test. Meanwhile, the soil strength was analysed with unconfined compressive strength (UCS) as well as direct shear (DS) tests. The results showed that Bacillus subtilis could use eggshell as calcium source to improve the stability of expansive soils. The use of higher bacterial cell concentration and longer curing period showed higher improvement in soil strength. After 90 days of curing period, there was a 30% decrease in the FSI, 74.32% increase in the UCS, and 77.27% increase in the cohesion of soil samples.
Identification of ATPase6 gene mutation from cimahi clinical isolates
Authors: Satiyarti R B , Ramadhan R , Mulyani R
Published: July 2020

Diabetes mellitus is a mitochondrial disease, caused by ATP deficiency. ATP was produced by the OXPHOS system in the mitochondria. Mitochondrial ATPase6 was one of important enzyme in oxidative phosphorylation process of ATP synthesis. The aim of this research was to provide information of ATP6 gene mutation that correlated to DMT2. A pair of primers was designed by in silico study. Blood samples were taken from DMT2 patients. Blood cells were lysed to obtain DNA template. Amplification of ATP6 gene was done by Polymerase Chain Reaction (PCR) technique. The amplicon was analyzed by 1% agarose gel electrophoresis. The gel showed 0,7 kb band of amplicon. The nucleotide sequencing showed that the amplicon was 681 base pairs. Analysis of phylogenetic showed that the sequence was 94,08% identical to homo sapiens ATP6 gene. Homology analysis between ATP6 gene from genbank and ATP6 gene fragments showed that there was a mutation 8860A>G. Amino acid analysis showed that 8860A>G change the amino acid T112A. Interestingly. It both happened in all samples, and it is a haplogroup. This is mean, it need further research to convince 8860A>G related to DMT2.
The allele frequency of C825T GNB3 gene in hypotension
Authors: Nugrahaningsih W H , Susanti I , Susanti R , Anggaraito Y U
Published: July 2020

Hypotension is signed by the systolic blood pressure less than 90 mmHg and the diastolic less than 60 mmHg. The prevalence of orthostatic hypotension is high, about 10-33%. Genetic polymorphism one of factors influenced the prevalence of blood pressure abnormality. GNB3 gene located at chromosome 12p13 influenced blood pressure by their involved in the second messenger during the transduction pathway. The survey conducted to 54 volunteers (29 normotension and 25 hypotension). The peripheral blood was collected from brachial vein. GNB3 gene were analysis by PCR-RLFP. DNA extraction was processing by GeneJET Genomic DNA Purification Kit. The genotype frequency of CC: CT:TT was 12%:72%:16% in hypotension, while 21%:52%:17% in normotension. The allele frequency of C:T was 48:52% in hypotension and 46,5:53,5% in normotension. The frequency allele of C and T were difference between hypotension and normotension (p=0.005). Concluded that C825T of GNB3 gene associated with hypotension evidence.
Comparison and characteristics of antioxidant components of traditional herbal medicine hygienically produced
Authors: Rudyatmi E , Bintari S H
Published: July 2020

Antioxidants in traditional herbal medicine are proven to have health benefits. The purpose of this study were to compare and characterize the antioxidant components of traditional herbal medicines serbat secang, keras kencur, kunyit asam and zingiber curcuma (zicurma). The total antioxidants of phenols, flavonoids, tannins, alkaloids and saponins were determined with a spectrophotometry, viscosity with a viscometery, and coloform with coliform test. Total phenols, flavonoids, tannins, alkaloids and saponins as well as viscosity on T: 67,25; 19.36; 114.52; not detected; 0.06; and 3.45. BK: 16,19; 30.07; 21.90; 0.03; 0.09; and 5.85. KA: 41.06; 27.31; 39.58; not detected; 0.13 and 5.10. Zicurma is made fromCurcuma xanthorrhiza,Curcuma longa, andZingiber officinallecontain the highest antioxidants, namely: total phenol 91.62 mg; flavonoids 127, 50; tannin 119.70 mg; alkaloid 0.003%; and 0.58% saponins. Viscosity 15.30 cP. Coliform on all herbs were not detected. In conclusion, antioxidants content on Sc, BK, KA, and zicurma are varies. Viscosity is ideal asa a drink and hygienically produced. Zicurma is a potential traditional herbal medicine that has higher antioxidant component than others. Traditional herbal medicine is very potential, hygienic and suitable for consumption every day.
The findings of character values are integrated in the mathematics learning process (case study in Guangxi Normal University)
Authors: Rochmad  , Suyitno H , Sugiharti E , Yuanbing G
Published: July 2020

Good character values need to be possessed by students at the University. Based on the Regulation of Rector, No. 19 Year 2016, UNNES has 12 Ethics, namely: science for truth, academic freedom, harmony, responsibility, honesty, justice, caring, exemplary, discipline, politeness, non-discrimination, and mutual respect. China is known to have a good character education from elementary school to university level. So, we need a collaboration work with a university in China, namely: Guangxi Normal University (GXNU). Partner Lecturer: Prof. Dr. Guo Yuanbing. The problem: What character values are integrated into the learning process of mathematics at GXNU? The method of research: Qualitative approach. The research subjects of Local Students of GXNU were selected. The main activities in GXNU: Observation, interviews, triangulation, and Focus Group Discussion (FGD) in GXNU, guided by Prof. Dr. Guo Yuanbing. The results (1) The character values that found and grown in GXNU were as follows: Prosperity, Democracy, Civility, Harmony, Freedom, Equality, Justice, Rule of Law, Patriotism, Dedication, Integrity, and Friendship. (2) Lecturer of Mathematics Education of GXNU was given the freedom to apply some or all of the values of character into teaching and learning activities; Character values were not explicitly added into the Lesson Plan of a Math lecturer in GXNU; Violations of the application of character values were left entirely to the lecturer concerned with the support of the institution.
Mechanical strength of quartz reinforced polyvinyl acetate/leaves-waste composite
Authors: Masturi  , Alighiri D , Susilawati  , Sunarno
Published: July 2020

A quartz reinforced polyvinyl acetate/leaves-waste composite has been made using simple pressing method. This work was performed as an answer for the solid waste abundance and deforestation activity. Having been wet-milled using ethanol 70% and dried for 4 days, the quartz was added as reinforcement in polyvinyl acetate (PVAc)/leaves waste mixture with varied contents to form PVAc/leaves waste/quartz composite via pressing at 5 metric ton for 20 minutes. The compressive strength test shows the mechanical strength varies from 35.53 to 39.93 MPA as quartz contents, with a sample having quartz sand content 4.60 × 10−3 (w/w) has maximum mechanical strength as 39.93 MPa, and the addition of quartz above the content makes the mechanical strength tends to decrease. The strength values are comparable to some previous works by several authors and some building materials, such Sago pulp composite, polyurethane/solid waste/nanosilica composite, agriculture-waste/silica composite, soil brick, limestone, natural fiber reinforced concrete and Portland cement concrete. This result shows the quartz reinforced polyvinyl acetate/leaves-waste composite has been acceptable to compete the woods as building materials to reduce deforestation.
Problem-solving ability using mathematical modeling strategy on model eliciting activities based on mathematics self-concept
Authors: Kharisudin I , Cahyati N E
Published: July 2020

The purpose of this study is to test the effectiveness of problem-solving skills using mathematical modeling strategy on MEAs and to describe problem-solving skills based on the mathematics self-concept. This research uses a quantitative method followed by descriptive with research variables are problem-solving ability and mathematics self-concept. Data collection techniques used in this study are documentation, tests, questionnaires, and interviews, then processed with a classical completeness test, t-test, proportion test, and linear regression test. We find that the ability of problem-solving with mathematical modeling strategy on Model Eliciting Activities achieved completeness. The ability to solve problems with mathematical modeling strategies on Model Eliciting Activities is better than conventional learning models. Student’s mathematics self-concept has a positive effect on problem-solving ability by 31.2%. There are two subjects with high mathematics self-concept categories have high and low problem-solving skills, and two subjects with medium and low mathematics self-concept groups have medium and low problem-solving skills.