Segmentasi Perkebunan Kelapa Sawit dengan Data Mining Teknik K-Means Clustering Berdasarkan Luas Areal, Produksi dan Produktivitas

The oil palm is the most productive plantation product in Indonesia. Government strategies and policies related to oil palm plantations continue to be carried out considering that the plantation area is increasing every year. Segmentation of oil palm plantations based on area, production, and productivity aims to identify groups of potential oil palm plantations in the territory of Indonesia. This segmentation can provide consideration in formulating strategies and policies that will be made by the government. The segmentation method for grouping oil palm plantations uses the K-Means Clustering Data Mining technique with 3 clusters specified. Data mining stages start from data collection until representation is carried out, where 34 data sets are collected, only 25 data sets can be processed further. The results of this grouping obtained three plantation segments, namely 72% of the plantation group with low potential, 20% of the plantation group with medium potential, and 8% of the plantation group with high potential.

Mitigasi Penyebaran Covid-19 Melalui Pemetaan Kepadatan Pemukiman, Mobilitas Penduduk dan Lingkungan Kelurahan Kadia Kota Kendari

Abstrak: Isu pandemi Covid-19 menjadi perhatian dunia dan sampai saat ini belum diprediksi kapan akan berakhir. Penyebaran Covid-19 merubah pola interaksi dalam kurun waktu yang cepat dan drastis karena adanya pemberlakukan pembatasan pergerakan dan kegiatan manusia. Kota Kendari termasuk daerah yang terdampak penyebaran Covid-19 dan salah satu kelurahan yang terdampak dengan status zona merah adalah kelurahan Kadia. Dalam mengantisipasi penyebaran Covid-19 di kelurahan Kadia, perlu dilakukan mitigasi melalui pemetaan kepadatan pemukiman, mobilitas penduduk dan lingkungan. Tujuan kegiatan ini adalah melakukan mitigasi penyebaran Covid-19 melalui pemetaan kepadatan pemukiman, mobilitas penduduk dan lingkungan kelurahan Kadia. Metode yang digunakan dalam penelitian ini adalah survey dan overlay peta. Hasil penelitian menunjukan kepadatan pemukiman di kelurahan Kadia pada tingkat yang tinggi (25-34) pada RW 002, RW 007 dan RW 008. Kepadatan penduduk di kelurahan Kadia yang tinggi pada (62-92) pada RW 001 RT 002, RW 002, RW 007 RT 001 dan 003, RW 008 RT 003, dan RW 009 RT 003. Tingkat mobilitas penduduk dikelurahan Kadia yang tinggi (90-174) pada RW 002 RT 002, RW 003 RT 001 dan 002, RW 004 RT001, 002 dan 003, RW 005 RT 001, RW 006 RT 001, dan RW 007. Secara spasial kondisi lingkungan kelurahan Kadia didominasi oleh lahan terbangun dengan jumlah penduduk sebanyak 7775 jiwa. Berdasarkan hasil pemetaan kepadatan pemukiman, kepadatan penduduk, mobilitas penduduk dan lingkungan maka mitigasi tingkat potensial penyebaran Covid-19 di kelurahan Kadia difokuskan pada titik potensial yang tinggi (RW 002) dan titik potensial yang sedang (RW 007). Beberapa langkah mitgasi penyebaran Covid-19 yang dilakukan adalah memasang poster mitigasi penerapan protokol kesehatan dengan memakai masker, selalu mencuci tangan dengan sabun dan menjaga jarak.Kata kunci : Mitigasi, Pandemi Covid-19, Pemetaan, Kelurahan Kadia Abstract: The issue of the Covid-19 pandemic has become a worldwide concern and until now it has not been predicted when it will end. The spread of Covid-19 changed the pattern of interaction in a fast and drastic period due to the imposition of restrictions on human movement and activities. Kendari City is one of the areas affected by the spread of Covid-19 and one of the ward affected by the red zone status is Kadia Ward. In anticipating the spread of Covid-19 in the Kadia sub-district, it is necessary to carry out mitigation through mapping the density of settlements, population mobility, and the environment. The purpose of this activity is to mitigate the spread of Covid-19 through mapping the density of settlements, population mobility, and the Kadia urban village environment. The method used in this research is survey and map overlay. The results showed that the density of settlements in the Kadia village was at a high level (25-34) in RW 002, RW 007, and RW 008. The population density in the Kadia ward was high at (62-92) in RW 001, RT 002, RW 002, RW. 007 RT 001 and 003, RW 008 RT 003, and RW 009 RT 003. The level of population mobility in Kadia kelurahan is high (90-174) in RW 002 RT 002, RW 003 RT 001 and 002, RW 004 RT 001, 002 and 003, RW 005,RT 001, RW 006, RT 001, and RW 007. Spatially, the environmental condition of the Kadia ward is dominated by built-up land with a population of 7775 people. Based on the results of mapping settlement density, population density, population mobility, and the environment, mitigation of the potential level of Covid-19 spread in the Kadia ward is focused on high potential points (RW 002) and medium potential points (RW 007). Some of the steps to mitigate the spread of Covid-19 were putting up a mitigation poster for the implementation of the health protocol by wearing a mask, always washing hands with soap, and keeping a distance.Keywords : Mitigation, Covid-19 Pandemic, Mapping, Kelurahan Kadia

Applying conjoint analysis to match farmer's preferences for cattle traits with those conferred by the improved trypanotolerant Orma Boran cattle in coastal Kenya

Bovine trypanosomiasis is a key constraint to increased livestock production across all production systems of Kwale County in coastal Kenya. Genetically controlled trypanotolerance of cattle is regarded as one of the promising methods available to mitigate the impact of this disease, and the improved trypanonotolerant Orma Boran is one of the breeds available in Kenya for this purpose. Conjoint analysis was thus used to match farmer’s preference for cattle traits against those conferred by this breed in three production systems of Kwale County. The study also estimated the transaction costs (TC) that would influence access to breeding services while availing the breed. The aim was to identify production systems where the breed matches well with farmer preferences, as an initial step towards its dissemination. In order of importance, farmers preferred cattle that were resistant to trypanosomiasis, had large body size, exhibited resistance to tick-borne diseases (TBD), and had high milk output. However, there were inter-production system differences in trait preferences, where resistance to TBD was least valued in the agro-pastoral system, with more emphasis put on the size of animal and trypanotolerance respectively. On the other hand, in medium potential and marginal pastoral systems, more emphasis was placed on TBD resistance, followed by trypanosomiasis resistance. The agro-pastoral production system was therefore delineated as a potential area for disseminating the breed. Regarding transaction costs, the price of service was the most important transaction costs element. Furthermore, whereas bull service was preferred over artificial insemination (AI) services in marginal pastoral and medium potential systems, AI was given preference in an agro-pastoral system. It was thus concluded that the Orma Boran dissemination would be successful among agro-pastoral households system, and should be delivered using subsidized AI services.

Examining Mathematical Representation to Solve Problems in Trends in Mathematics and Science Study: Voices from Indonesian Secondary School Students

This study describes the mathematical processes in TIMSS (Trends in Mathematics and Science Study) to reflect issues. A descriptive qualitative methodology was used in this analysis as the research approach. The research allocated the respondent to the 6th grade students of Muhammadiyah 6 in the sub-district of Dau, Malang regency, East Java, Indonesia. Using a TIMSS 2011 test and interview, data was obtained. The results of the study showed that visual representation took place in both classes of high, medium, and low capacity. Students of high and low capacity conducted the symbolic representation process at the comprehension level, while students of medium capacity performed the symbolic representation process at the problem-solving stage. In addition, as they wrote topics, the writing of the conclusions was done by students who had high skill. Students who had medium potential when they wrote questions completed the writing of the conclusions. The students with a low level of skill wrote what was understood and asked about the issues.

(Bio)dissolution of Glassy and Diopside-Bearing Metallurgical Slags: Experimental and Economic Aspects

Dissolution of diopside-bearing slag and its amorphous counterpart was investigated to decipher recovery potential of these slags. The contribution of direct slag phase dissolution was investigated using a biotic solution with Acidithiobacillus thiooxidans versus sterile growth medium, whereas citric acid was applied to demonstrate slags dissolution in organic medium. Potential metal donor slag phases and easily released elements were identified by comparing theoretical and experimental dissolution ratios. It was shown that K and Na were the most mobile elements leaching from glassy and diopside slag (up to 99%). Recovery targeted metals were released in the quantities of 56% (Cu)–96% (Zn) from glassy slag and 27% (Cu)–98% (Zn) from diopside slag. Results demonstrated that studied slags are good candidates for Zn recovery during short-term treatment, whereas extension of time would be required for efficient Cu extraction. Abiotic growth medium had little effect on metal leaching (up to 53% versus only 3% for the glassy and diopside slags, respectively). Glassy slag revealed greater susceptibility to dissolution as compared to diopside slag. Further studies improving recovery conditions are expected to improve environmental soundness of proposed treatments and to generate residues depleted in toxic elements. This study highlights the importance of evaluation of individual slags in terms of metal and major elements leachability.

POTENSI BERPIKIR KRITIS SISWA DALAM MENYELESAIKAN MASALAH PADA MATERI TRIGONOMETRI

Mathematics learning has an essential role in forming and developing students' critical thinking skills. It is in line with the objectives of learning mathematics, which shows a logical, critical, analytical, careful, and thorough, responsible, responsive, and not easily give up in solving problems. Mathematics taught to students has the aim to equip students to have critical abilities. But in reality, the implementation of mathematics learning in schools has not been able to train students' critical thinking skills. This study aims to describe and find out the potential of students' critical thinking in solving problems in trigonometry in high school. The research method used in this research is descriptive with exploratory research. The subjects in this study were 30 subjects. Based on the results of this study, it was found that the potential for students' critical thinking in solving trigonometry problems was medium. Potential students' critical thinking is categorized as being because students have not been able to understand the problem displayed correctly, students have difficulty in giving arguments or reasons for the answers they have stated, students cannot identify and choose relevant information because of the available mathematical models, students have difficulty in giving questions to the information displayed.Keyword: Critical Thinking, Potential, Trigonometry

Daerah Penangkapan Potensial Tuna Madidihang Thunnus albacares, Bonnaterre, 1788 (Teleostei:Scombridae) di Laut Seram

This research aims are to determine the potential fishing grounds of yellowfin tuna based on the approach of sea surface temperature, chlorophyll-a and catches in the Ceram Sea. Overall catches of 407 Individuals. In January the total catches were 66 individuals (14.44%), in February 67 individuals (14.66%), in March 84 individuals (18.38%), in April 116 individuals (25.38%) and in May 124 individuals (27.13%). The distribution of sea surface temperature and chlorophyll-a in the Ceram Sea in January-May 2019 looks varied. In January the average sea surface temperature was 29.13 oC, in February sea surface temperature was 29.54 oC, in March sea surface temperature was 30.12 oC, in April sea surface temperature was 30.12 oC, in May sea surface temperature was 29.77 oC. Chlorophyll-a concentration in January and February was 0.21 mg/m3, March was 0.20 mg/m3, April was 0.16 mg/m3, and May was 0.25 mg/m3. The results of the t-test analysis showed the P-value of sea surface temperature was 0.009<0.05, chlorophyll-a P-value 0.00048<0.05. Determination of potential fishing areas based on sea surface temperature, chlorophyll-a, and CPUE indicators shows that potential fishing areas are found in January, February, March, and May, while in April are in the medium potential category. Penelitian ini dilaksanakan dengan tujuan menentukan daerah penangkapan potensial Tuna madidihang berdasarkan pendekatan suhu permukaan laut, klorofil-a dan hasil tangkapan di Laut Seram. Secara keseluruhan hasil tangkapan ikan tuna madidihang sebanyak 407 Individu. Bulan Januari total hasil tangkapan sebanyak 66 individu (14.44%), bulan Februari 67 individu (14.66%), bulan Maret 84 individu (18.38%), bulan April 116 individu (25.38%) dan bulan Mei 124 individu (27.13%). Sebaran suhu permukaan laut dan klorofil-a di Laut Seram pada bulan Januari-Mei 2019 terlihat bervariasi. Bulan Januari rata-rata suhu permukaan laut sebesar 29.13 oC, bulan Februari suhu permukaan laut 29.54 o, bulan Maret suhu permukaan laut 30.12 oC, bulan April suhu permukaan laut 30.12 oC, bulan Mei suhu permukaan laut 29.77 oC. Konsentrasi klorofil-a pada bulan Januari dan Februari sebesar 0.21 mg/m3, bulan Maret sebesar 0.20 mg/m3, bulan April sebesar 0.16 mg/m3, dan bulan Mei sebesar 0.25 mg/m3. Hasil analisis uji t menunjukan nilai P-value suhu permukaan laut sebesar 0,009<0,05, klorofil-a P-value 0,00048<0,05. Penentuan daerah penangkapan ikan potensial berdasarkan indikator suhu permukaan laut, klorofil-a dan CPUE menunjukkan daerah penangkapan ikan potensial terdapat pada bulan Januari, Februari, Maret, dan Mei, sedangkan pada bulan April berada dalam kategori potensial sedang.

Potential of dust emission resources using small wind tunnel and GIS: case study of Bakhtegan playa, Iran

Determination of the high potential of dust emission is a requisite affair in the management of dusts emission and as well as avoiding its risks. Wind tunnel is among the most important approaches in the study of areas having high potential in emitting dusts. Extensive dried playas and desert areas require the making of low-cost, simple, and car-portable tunnels capable of presenting comparable data of various areas even supposing not having enough precision in the model of real wind motion. In this study, we first engaged in making a car-portable tunnel with a primarily semicircle section of 38 cm height, 50 cm diameter, and 110 cm length. A fan and key appliance with the ability to change speed were used along with a simple transformer launched with car battery. Then, concentration of the pm10 dusts was measured in the various wind speeds of 1, 2.5, 4, 5.5, and 7 m/s by the help of anemometer and digital equipments. The study of Bakhtegan playa was done, as the methodology of handling with this tunnel, in 35 positions, and zoning of the results was performed via ArcGIS software. Depending on the destructibility of the shell by wind, the areas under study were categorized as low potential (34%), medium potential (37%), and high potential (29%) in emitting dusts. The results of zoning spotted the high-potential areas on the map. The usage of small tunnels, as in the present model, may be applied in order for the low-cost and fast studies of vast areas to the purpose of playas management.

PERTUMBUHAN ALOMETRI DIMENSI PANJANG TUBUH BABI BATAM PERSILANGAN FASE STARTER

Research was conducted at AR0-M Pig Farming in Bumi Marina, Manokwari from August to September 2017 to investigate the body length dimension of Batam Cross Pig. Eight young male Batam Cross pig at 8 month years old were measured five times. Collected data was analysed using regression curve estimation. Result showed that body length had a high potential growth. Both head and neck length had medium potential growth, length had a while tail length had a law potential growth.