Analisis Kesalahan Konsep Siswa Dalam Menyelesaikan Soal Ujian Nasional Matematika SD

: An Analysis of the Erroneous Concepts of Students in Solving Problems of National Ex­amination on Elementary School Mathematics. This study aimed to find information around the Na­tional Examination on Elementary School Mathematics in the 2012/2013 academic year in Kediri. The in­formation includes: (1) the underlying attributes of the test items, (2) the materials in the questions that cause many students to make mistakes, (3) types of mistakes made by the students, (4) the location of the dominant student's misconceptions, and (5) the main cause of the student's misconceptions. Content analysis was used in descriptive quantitative research. The sources of the data were the student answer sheets and National Exam booklet. The results show that (1) the underlying attributes of the elementary school mathematics examination items are of 67 kinds, 4 attributes of the contents, 60 attributes of the process, and 3 skills attributes; (2) the materials which cause many students to make mistakes is a matter of geometry and measurement; (3) the highest type of error is in the number of procedural errors, in ge­ometry and measurement concepts, and in the interpretation of the data processing; (4) the dominant mis­conception deals with arithmetic and basic concepts of numbers, with geometry and measurement, and with data processing of statistics; and (5) the main cause of the errors on the concept of numbers is inap­propriate implemention of arithmetic operations, misunderstanding the concept of exponential number, misapplication of formulas and concepts, and misunderstanding the concept of mean, median and mode

Respon Pertumbuhan Dan Hasil Tanaman Kemangi (Ocimum basilicum L.) Pada Pemberian Berbagai Dosis Pupuk Nitrogen

Tanaman kemangi (Ocimum basilicum L.) merupakan tanaman yang banyak dibudidayakan oleh masyarakat, rata-rata petani mengusahakan kemangi dengan proporsi lahan yang kecil. Tanaman kemangi terutama bagian daunnya biasanya digunakan sebagai lalapan dan penyedap masakan maupun sebagai obat-obatan seperti perut kembung, demam, melancarkan ASI, rematik, sariawan dan juga sebagai anti jamur, selain itu tanaman kemangi juga memiliki kandungan atsiri. Upaya peningkatan produktivitas dan kualitas tanaman kemangi salah satunya dapat dilakukan dengan pemberian perlakuan dalam budidaya yang mendorong peningkatan hasil produksi. Salah satunya adalah pemberian unsur nitrogen yang optimal, karena tanaman kemangi merupakan tanaman yang membutuhkan unsur nitrogen yang tinggi terutama pada produktivitas daun. Penelitian ini bertujuan untuk mengetahui pengaruh dosis pupuk nitrogen pada tanaman kemangi. Penelitian dilaksanakan di Kebun Rumah Dusun Balongejo Desa Ngusikan Kabupaten Jombang mulai bulan Februari hingga April 2022. Penelitian dilaksanakan menggunakan Rancangan Acak Kelompok (RAK) non faktorial 6 perlakuan dosis pupuk nitrogen yaitu N1 = 2,6 g/tanaman, N2 = 3,9 g/tanaman, N3 = 5,2 g/tanaman, N4 = 6,6 g/tanaman, N5 = 7,9 g/tanaman dan N6 = 9,2 g/tanaman. Parameter pengamatan meliputi tinggi tanaman, jumlah cabang primer, jumlah daun, luas daun, bobot daun, bobot segar, dan indeks panen. Hasil penelitian menunjukkan bahwa 1) terjadi pengaruh nyata pemberian dosis pupuk nitrogen pada pertumbuhan tanaman kemangi; 2) perlakuan dosis pupuk nitrogen N5 memberikan hasil tertinggi pada pertumbuhan tanaman kemangi; 3) tidak ada pengaruh nyata pada parameter indeks panen

Analisis Tekstur Pada Citra Motif Batik Untuk Klasifikasi Menggunakan K-nn

Indonesian's Batik is one of culture heritage that recognized around the world. Batik has many variations of pattern based on their region. In this research, Batik would be used as subject for texture feature extraction. The value of this feature extraction would be used for classification using K-Nearest Neighbor (K-NN) method. Texture Feature Extraction components that used in this research were Entropy, Correlation, Homogeneity, and Energy. This research will investigate which component would give dominant effect for Batik's pattern recognition. Batik pattern used in this research is pattern from Yogyakarta region. There are four patterns namely Ceplok, Parang, Semen, and Nitik. The result showed that there was no component from Texture Feature Extraction that gave dominant effect (average = 53,96%). Component with the highest value of accuracy is Correlation with a percentage of 55,83%. Whereas for K-NN classification, the best accuracy is 60% for K = 5

Substraksi Background Dan Deteksi Bayangan Pada Citra Grayscale Sekuensial

Ekstraksi objek pada suatu citra grayscale dengan background yang tidak tetap merupakan hal yang rumit sehingga membutuhkan pendekatan dengan computer vision. Penelitian ini menerapkan proses substraksi background dan deteksi bayangan untuk mendapatkan bentuk dari objek yang diinginkan. Proses substraksi bayangan membutuhkan background model yang diperoleh dari pengolah citra sekuensial input dari pengguna. Tujuan dari background model ini adalah untuk menentukan pengelompokan piksel sebagai background atau sebagai objek. Proses deteksi bayangan akan mengkalkulasikan nilai piksel objek dengan background model menggunakan normalized cross-correlation (NCC) untuk melihat apakah nilai objek adalah suatu penguatan nilai dari background model yang menandakan piksel tersebut adalah bayangan. Penelitian ini akan mengimplementasikan metode tersebut dan menganalisa hasil serta pengaruh input pengguna untuk mendapatkan hasil substraksi background dan deteksi bayangan yang optimal

Adsorption of Phosphate in Aqueous Solutions Using Manganese Dioxide

Effort to remove phosphate from aquatic ecosystem is of great interest, not only for preventing algae bloom problem but also for recovering phosphate, as this is an essential material. Adsorption is considered as an effective method especially because the nutrient loaded adsorbent can be directly used for fertilizer. Therefore, this study investigated the potential use of manganese dioxide in natural form (pyrolusite) to adsorb phosphate in aqueous solutions. A series of batch experiments were done to elaborate the adsorption process of phosphate onto manganese dioxide. Several environmental conditions such as pH, temperature and ionic strength were applied in order to get a better understanding of the process mechanism. The results indicated that pH was obviously affected the adsorption process, meanwhile ionic strength did not play significant role. The adsorption of phosphate was higher at a lower pH and getting reduced as the pH increased. Similar to that, the percentage removal of phosphate was declined significantly in higher ionic strength, indicated that the interaction between phosphate and manganese dioxide was mainly controlled by electrostatic force.  The adsorption isotherm data correlated better with Langmuir model rather than Freundlich model. The maximum adsorption capacity of manganese dioxide was 11.40 mg P/g. The kinetic data was very well fitted to pseudo second order equation suggested that chemical reaction involved in adsorption process. Moreover, thermodynamic data confirmed that phosphate adsorption onto manganese dioxide was an endothermic process

The Impact of Social, Economic and Environment in Local Community Participation of Archeological Tourism Village Bedulu Gianyar, Bali

This study aims to measure the changes in the economic, socio-culture and community environment as the result of community participation at Bedulu tourism village activities. The activities of Bedulu tourist village involved the community in a various sector such as, economic, socio-culture and environment preservations. Quantitative descriptive method with quantitative regression analysis techniques applied in this research. The independent variable of this research is the local community participation (X), whereas the dependent variable consists with three economic impact (Y1), socio-culture (Y2), and environment (Y3). Purposive sampling technique conducted in order to explore the response of 50 respondents with tourism implementation impact in Bedulu tourism village. The sample consists of all local community participations and management in which involved with the tourism village. Findings to this research are the positive impact of the local community participation and significant effect on the change of economic, socio-culture and environmental preservation in Bedulu Tourism Village. The implication of this research is the incremental of local community participations in creative industries based on local community.

Isolation and Selection of Endophytic Fungi From Cacao as Biocontrol Agents of Phytophthora Palmivora Butl.

Phytophthora palmivora Butl. is a causal pathogen of black pod rot of cocoa (BPR) which leads to severe crop losses. Control of P. palmivora using biological agents such as endophytic fungi is most recommended for its environmentally friendly benefits. The aim of this research was to obtain endophytic fungi from cacao plant that works as biological agent against P. palmivora. The research was conducted at Plant Protection Laboratory, Indonesian Industrial and Beverage Crops Research Institute (IIBCRI), Sukabumi, from January to July 2015. The exploration for endophytic fungi was carried out in cacao producing regions such as Southeast Sulawesi, West Java, and Lampung. The samples taken were of leaves, pods, and branches of a number of cacao varieties and clones. Isolated endophytic fungi were then being sterilized, selected, and studied in vitro using PDA medium and in vivo using cacao pod. The exploration obtained 269 endophytic fungi, consisted of 195 isolates from Southeast Sulawesi, 41 isolates from West Java, and 33 isolates from Lampung. The evaluation of endophytic fungi isolated from P. palmivora showed that there were 4 species of Trichoderma isolates which have potentials for biological agents to control P. palmivora, namely SWI, STII, PB5, and SWII with inhibitory effect of 70.33%; 68.89%; 67.43%; and 66.67%, respectively

Optimization of the Ahp Method in Determining the Location of Touristdestinations on the Island of Java, Indonesia

Purpose: This study aims to map the pattern of tourist preferences in visiting tourist destinations on the island of Java   Theoretical framework: This research tries to make a tourist decision model in choosing a tourist destination on the island of Java with a mathematical method, namely Analytical Hierarchy Process (AHP).   Methodology: The sample data used is data sourced from the "Indonesian backpacker" group. Respondents were selected based on the criteria that they had traveled to three tourist destinations, namely; Jakarta, Yokjakarta, and Bandung. Data collection was carried out to obtain information and data related to this research. In this study, the researcher optimizes the calculation of the AHP method to determine the ranking of the existing alternatives so that it is hoped that the calculation results are more accurate than using the AHP method   Findings: Based on communal considerations (all criteria) with the AHP method in sequence; Jakarta (50,5%), Bandung (30,9%), and Yogyakarta (18,6%). The results showed that Jakarta became the main priority, then Bandung and respectively. Ease of access and completeness are the reasons for choosing a tourist destination on the island of Java.   Research implications: The quality of site transactions is closely related to the quality of human resources (HR) where in service products, humans become the mind product. HR in Tourism sector are all human aspects that support tourism activities, both tangible and intangible, which aims to meet the needs and create tourist satisfaction and have a positive impact on the economy, welfare, and environmental and cultural sustainability in a tourist area. Improving the quality of human resources is very important in improving the quality of tourist destinations.   Originality/value: Research on the model for selecting tourist destinations on the island of Java as the island with the most populous population in Indonesia has never been done before by other researcher

Coastal Studies for Implementation of Law 27/2007 in Sidoarjo

Law 27/2007 is the very basic rules for making the composition as well as planning and management tool on the ocean / beach / small islands. Law 27/2007 assumed less informed and not recognized by the staff of the government or society in general. This paper aims to identify the extent of socialization of Law 27/2007 by the relevant stakeholders, identify what factors or variables that have been well received and well prepared to implement Law 27/2007. Coastal and marine areas are relatively large with a variety of problems into consideration in determining Sidoarjo regency as a research location. There are two factors that were assessed, namely the level of knowledge of the material or content of the Law 27/2007 and the level of readiness for the implementation of Law 27/2007. Factor is defined by a number of variables and indicators. Methods of analysis using the Multi Dimensional Scaling with ALSCAL procedure to map a number of indicators. Identify the level of knowledge and level of readiness for the implementation of Law 27/2007 on the respondents showed very weak. There are varying levels of knowledge, although the general information about the Act is informed by good, but the policies, programs and tools to implement the government or community level have not adequate yet