Jurnal Pena Sains
Not a member yet
175 research outputs found
Sort by
The Effect Of Additional Corn Husk Toward The Density Level of Light Brick
No full textThe Light brick is an engineered product developed from the usual brick with the addition of mixed materials. Brick is one type of composite material. Many people choose to use natural fiber-reinforced composites to replace synthetic ones and composite materials engineering development. So in the technology of brick-making, natural fibers are currently used as a choice as additional material mixed to produce light bricks. Additional materials often used in light bricks include fly ash, sawdust, coconut husks, rice husks, etc. This study used corn husk waste as additional material in the light bricks making. The addition of corn husk powder can affect the mechanical properties of brick. It is shown by the more significant the percentage of corn husk powder added, the smaller the density and compressive test value of the brick produced. Meanwhile, the greater the porosity value is. The decrease in density level and compressive test value will undoubtedly affect the brick's mechanical and physical properties. The reduction in density level and mechanical properties of the brickwork can be minimized by applying an outer layer in the form of cement mortar of the products.The Light brick is an engineered product developed from the usual brick with the addition of mixed materials. A brick is one type of composite material. Along with the development of composite materials engineering, there are many people who choose to use natural fiber reinforced composites to replace the synthetic one. So in the technology of brick-making, natural fibers are currently used as an alternative choice as an additional material that is mixed to produce light bricks. Additional materials that are often used in the making of light bricks include fly ash, sawdust, coconut husks, rice husks and others. This study used corn husk waste as an additional material in the light bricks making. The addition of corn husk powder can actually affect the density of brick. It is shown by the greater the percentage of corn husk powder added, the smaller the density value of the brick produced,meanwhile the greater the porosity value is. The decrease in density level will certainly affect the mechanical and physical properties of the brick. The decrease in density level and mechanical properties of the brickwork can be minimized by applying an outer layer in the form of cement mortar of the products
FANTASTIC FUNGI AROUND US: A CASE STUDY OF IPB UNIVERSITY CAMPUS FOREST
Full text linkCampus forest is the area of education and conservation at IPB University. The preliminary study proved that the area stores high biodiversity, including macroscopic fungi, which have not been well recorded. This study aimed to inventory the diversity of macroscopic fungi in the IPB University campus forest (IPBUCF) to be used as media for mycology course practice and optimize the future's mushroom potential. The results showed 18 mushroom species divided into two divisions, namely Basidiomycota and Ascomycota. Basidiomycota consist of: Agaricus sp., Amanita sp., Amauroderma sp., Conocybe sp., Crinipellis sp., Gymnopus sp., Hypholoma sp., Marasmius sp.1, Marasmius sp.2, Naucoria sp., Pluteus sp. 1, Pluteus sp. 2, Pholiota sp., Ramaria sp., Rigidoporus sp., and Russula sp. Ascomycota members were divided into two classes, namely Pezizomycetes and Eurotiomycetes. The identification results confirmed the existence of Cookeina cf. tricholoma and Onygena sp. In this paper, we explained how to describe mushrooms for identification using macroscopic features
THE EFFECT OF LEARNING CYCLE 5E ON GLOBAL WARMING THEME TO ENCOURAGE STUDENTS’ SCIENTIFIC PROCESS SKILLS
Full text linkThis study aimed to determine the effect of the Learning Cycle 5E model on junior high school students' science process skills. This study used the Quasi-Experimental Design study with Nonequivalent control group design. The instrument used a science process skills test. The research sample is students in class VII semester II of Junior High Scool 8 Pekalongan, which purposive random sampling technique. The data were collected by essay tests of science process skills, observation sheets, and documents. Analytical data were used instrument analysis, pretest, and posttest of science process skills, etc. Based on the value of n-gain from Learning Cycle 5E class were obtained 66.33 with moderate criteria, so the Learning Cycle 5E model is moderate in science process skills. The students' responses towards the Learning Cycle 5E model were positive, 14 of the 15 statement items included in the excellent category. It indicates that the learning cycle 5E can encourage students’ science process skills
THE ANALYSIS OF LEARNING MOTIVATION ON COLLEGE STUDENT OF ELEMENTARY SCHOOL TEACHER EDUCATION COURSES IN THE SCIENCE BASIC CONCEPT
Full text linkMotivation in learning will influence the student to be a success. Four aspects that became part of the motivation is the fundamental aspects of attention, relevance, confidence, and satisfaction. The purpose of this research is to know the extent to which students ' motivation of elementary school teacher education on the basic concept of subject science. The method used is descriptive quantitative survey method; in this case, use the question form of student motivation. This research was carried out in April 2016. The subject of research is the 234 students distributed in University of Nahdlatul Ulama Surabaya and the State University of Surabaya. The results showed that students ' learning motivation of elementary school teacher education in aspects of attention, relevance, and satisfaction are on the category quite nicely, while confidence is at a type less well this defines the that required increased efforts of student learning motivation on the subject the basic concept of science
TRINGO TAMANSISWA (NGERTI, NGRASA, NGLAKONI): THE DEVELOPMENT OF SUBJECT SPECIFIC PEDAGOGY WITH VALUE CLARIFICATION-INQUIRY LEARNING
Full text linkInquiry learning based on clarifying values is one of the innovative education that cannot separate from the reality of daily life, which involves students actively and internalizing values in students. This study aims to describe the development of subject-specific pedagogy with value clarification-based learning to develop tringo. Through this learning, students are invited to understand, experience, and manage so that learning becomes more meaningful. Teachers should prioritize not only cognitively but also psychomotor and affective. So, the value of the investment is carried out in an integrated and consistent manner in science learning to form a generation that is not only smart but also personality or character. The research method used is the modification of the RD model of Plomp and Ely, namely: 1) formulating needs; 2) designing; 3) data preparation; 4) preparation and writing; 5) integration and evaluation; 6) making the initial master; and 7) master. Data collection techniques were carried out using observation techniques, interview techniques, documentation techniques, and questionnaire techniques. The results of this study are the development of the concept of 'tringo' which internalized through a value clarification approach. And developing an attitude of tolerance, the emergence of self-discipline, having a sense of responsibility, developing a work ethic, having a sense of openness, being able to think positively, developing self-potential, cooperating, respect each other and foster honesty. value clarification learning can use as one of the innovation models in meaningful learning
TEACHER SKILLS IN DEVELOPING INSTRUMENTS OF TEST ESSAY IN SCIENCE LESSONS IN JUNIOR HIGH SCHOOL: Case Study In Kediri, East Java-Indonesia
Full text linkAssessment and evaluation must always be carried out. The evaluation process is one of the teacher's tasks that will determine the direction of the next learning process. Therefore, the teacher must be skilled in compiling the question test instrument, one of which is a matter of description. Regarding this objective, teachers need to be equipped with ways to prepare these instruments so that the quality of the questions made meets the standards and by the indicators of learning. Briefing on the science teachers MGMPs Kediri shows that teachers already have skills in preparing the description of the test instrument with a percentage of 53.12% about the level and 46.88% HOTS LOTS level. Based on the results, the skills of science teachers in Kediri District are not expectations. The teachers must continue to practice in making the test instruments
ADIRAMA: PRODUCTION AND USE OF THE SALT ADDITIVE OF MADURA
Full text linkSalt of Madura is a unique product and dominates in the local and regional markets. It is the result of sweat and sweat from local youth in seeking and living life. The process of using salt additives is an idea that arises because naturally the people of Madura have used it, which is adding trusion in terms of facing the water process that it has. The sea water that experiences the process of adding additives has the highest NaCl, ceramics land 96.02%, LDPE land 95.72% and soil area 93.81%. Whereas those who were not treated had lower NaCl, 93.94% ceramics, LDPE 92.65% and soil 87.78%. And for some treatments for some treatments heavier than others, namely ceramic additives 47.65 Kg, additive LDPE 49.15 Kg, and additive soil 32.50 Kg. While the soil that is not treated is mostly lower in salt, non-additive ceramics 46.75Kg, non-additive LDPE 50.75 Kg and non-additive soil 26.95 Kg
APPROPRIATE DOSE OF PGPR ANTIFUNGAL TO INHIBIT FUNGI THAT CAUSE ROTTEN ON THE RHIZOME OF RED GINGER (Zingiber officinale var. Rubra)
Full text linkRed ginger (Zingiber officinale var. Rubra) is one of the leading commodities producing essential oils and oleoresins. In red ginger cultivation, several obstacles were encountered, including the fungus attack, which caused rotten rhizome, so that the nursery process failed. Generally, fungicides are given to control the fungus. However, chemical fungicides can harm health and the environment. Therefore natural environment fungicides are needed. PGPR has antifungal activity. It can use as a natural fungicide. This study aims to determine the antifungal activity of PGPR against fungi that cause rotten red ginger rhizomes in the nursery process using doses of 0%, 25%, 50%, 75%, and 100%. The results, the 75% PGPR dose, give the highest average inhibitory zone to fungi causing rhizome in red ginger but not significantly different from the 100% dose. Furthermore, at a dose of 75%, the resistance of fungal growth amounted to 26.7%. The use of PGPR at appropriate dosages will induce the growth of fungi that cause rot in the rhizome of Red Ginger
DEVELOPMENT OF ETHNOSCIENCE PUZZLE GAME FOR CHILDREN WITH SPECIAL NEEDS
Full text linkScience is the science that underlies the development of technology that is used to obtain an explanation relating to objects and phenomena that occur in everyday life. The purpose of this study is to develop science by using learning media in the form of puzzles with Javanese local wisdom to determine the learning activities and motivation of children with special needs. The research method used is a mixed method in which research uses qualitative and quantitative methods. While the data collection techniques used were interviews, documentation, and observation to determine the learning activities and motivation of children with special needs. The sampling technique used in this study was purposive sampling area with a total sampling of seven children with special needs in the Panti 2 Yayasan Sayap Ibu Sampling was carried out for children in the Panti 2 Yayasan Sayap Ibu. Finally, the puzzle game can determine the activities and motivations of students with special needs. Therefore, it is important to develop learning media (game)based on local wisdom for children with special needs
DIVERSITY OF TREES AND SHRUBS ON SPECIAL-PURPOSE FOREST
Full text linkThe beauty of KHDTK (Special-purpose forest) in Banten province saves a lot of biodiversities that must be protected because it is a source of wealth that supports human life towards prosperity. The research objective was to determine the diversity of trees and shrubs and to identify the types of plants (trees and shrubs) in the Forest Area with Special Purpose in Carita. This research was carried out in Sukarame Village, Carita District, Pandeglang Regency, Banten. The method used in this study is descriptive research. Technique sampling uses the Line transect method. The results showed that the tree Shannon-Weaver (H') Diversity index at KHDTK in Carita was 0.600 in the low category. Bush Shannon-Weaver (H) Diversity Index at Carita KHDTK is 0.692 in the low category. Evenness Index (E) at the KHDTK in Carita is 0.204 in the (low) category. The Evenness Index (E) in the Carita KHDTK was 0.33 in the low category. Further research is needed to be able to find diversity in the KHDTK in Carita and to complement references about KHDTK in Carita