Analisis Jalur Terdekat Menuju Bangunan Shelter Evakuasi Tsunami di Kota Padang Menggunakan Network Analyst

West Sumatra is one of the provinces in Indonesia that is prone to earthquakes due to the Great Sumatran Fault and the convergence of the Indo-Australian Plate and the Eurasian Plate beneath the sea to the west of the island of Sumatra. Padang is a city with earthquake potential due to the Semangko Fault, and one of the potential consequences is the occurrence of tsunamis. To minimize these impacts in Padang, tsunami evacuation buildings, known as shelters, have been established. Therefore, it is crucial for the community to be aware of the nearest routes to these evacuation shelters in Padang. One method employed is using Network Analyst. Network Analyst is a tool within the ArcGIS software, which is a Geographic Information System (GIS) developed by ESRI to manage, analyze, and visualize geographical data. By utilizing Network Analyst, the closest routes to the researched areas are generated. Network Analyst employs the Dijkstra's algorithm to solve routing problems and can be generated based on two criteria: distance and time. The result of the nearest route to the tsunami evacuation shelter in Batang Arau Subdistrict, South Padang District, is from SDN 29 Pebayan Penggalangan to Nurul Iman Mosque Padang, spanning a distance of 1585 meters. The analysis of the nearest route using Network Analyst is then compared with manually calculated results using the Dijkstra's algorithm. The difference between manual calculations and Network Analyst results ranges from 1 to 4 meters, approaching reality. This information can serve as a reference for determining the nearest routes to evacuation shelters in the event of a tsunami in Padang

STRES AKADEMIK PADA MAHASISWA RANTAU DITINJAU DARI RESILIENSI

Penelitian ini bertujuan untuk mengetahui ada tidaknya hubungan antara stres akademik pada mahasiswa rantau dan resiliensi. Hipotesis yang diajukan dalam penelitian ini adalah terdapat hubungan negatif antara resiliensi dengan stress akademik pada mahasiswa rantau. Subjek penelitian adalah mahasiswa rantau di kota semarang, sebanyak 78 orang. Teknik pengambilan sampel menggunakan snowball sampling. Jenis penelitian kuantitatif korelasional. Alat ukur yang digunakan adalah skala stres akademik dan skala resiliensi. Metode analisis data yang digunakan adalah teknik korelasi Product Moment. Berdasarkan hasil perhitungan diperoleh hasil rxy = -334 dan sig 0,003 (sig<0,05) yang berarti ada hubungan negatif antara stres akademik pada mahasiswa rantau dan resiliensi yakni semakin tinggi resiliensi maka akan semakin rendah stres akademik pada mahasiswa rantau. Dapat disimpulkan bahwa hipotesis yang diajukan oleh peneliti diterima. Kata Kunci : Stres Akademik, Resiliensi, Mahasiswa Ranta

INVESTIGATION OF AG AND PD FISSION PRODUCTS PENETRATION DEPTH IN ZRC LAYER OF HTGR TRISO FUEL PARTICLE USING SRIM/TRIM MONTE CARLO SIMULATION

High-temperature gas-cooled Reactors (HTGRs) is one type of Generation IV reactor that uses TRISO (tri-structural isotropic) coated-fuel particles (CFP) for containment of radioactive fission products, which is produced from the fission reaction of UO2 fuel. ZrC has been proposed to be the main barrier for containing fission products either as a replacement of the SiC layer or as an additional layer of the TRISO fuel particle to overcome the corrosion issue of SiC because of interaction with the fission product of silver (Ag) and palladium (Pd). ZrC is an excellent material because it has good physical and nuclear properties, i.e., high corrosion-resistant, excellent thermal shock resistance and a small cross-section for neutron capture. ZrC is expected to provide a better barrier against Ag and Pd diffusion attacks than SiC. However, ZrC is very challenging to manufacture, so it depends on factors such as microstructure, chemical composition and interactions, morphology and impurities. Many attempts have been made to study the interaction phenomena of Ag and Pd with ZrC that cause corrosion. Here, the penetration depth of those two fission products was studied using SRIM (Stopping and Range of Ions in Matter) /TRIM (TRansport of Ions in Matter) for simulation with 0.1-10 MeV of kinetic energies. The results provide detailed information about the Ag/ZrC and Pd/ZrC Ion Ranges and Doses. In addition, Ag and Pd’s products of the depth and concentration within ZrC were observed as important first steps in understanding the corrosion phenomena of her ZrC layers in TRISO particles

Ag AND Pd FISSION PRODUCT IMPLANTATION ON SiC LAYER IN TRISO FUEL PARTICLE OF HTGR USING SRIM/TRIM MONTE CARLO COMPUTER

Ag AND Pd FISSION PRODUCT IMPLANTATION ON SiC LAYER IN TRISO FUEL PARTICLE OF HTGR USING SRIM/TRIM MONTE CARLO COMPUTER. Silicon Carbide (SiC) has excellent characteristics such as wide band gap, high electron mobility, high thermal conductivity, and radiation effects resistance. Therefore, SiC is widely used for various applications, including nuclear fuel systems. SiC is used in TRISO (Tri-Structural Isotropic) coated fuel particle in HTGR (High Temperature Gas cooled Reactor). TRISO, which consists of Inner Pyrolitic Carbon, SiC, and Outer Pyrolitic Carbon, is one of the safety systems features of the reactor. However, one of the issues of the system is corrosion of SiC caused by silver (Ag) and palladium (Pd). Nevertheless, the detailed mechanism of this corrosion phenomenon, such as the existence of Ag and Pd and how deep those two fission products penetrate the SiC layer, are still unknown. This study aims to investigate the physical interaction of Ag and Pd with the SiC coating layer of TRISO nuclear fuel particles. For this purpose, the physical effect of the penetration of the energetic Pd and Ag fission products into the SiC layer has been simulated using SRIM (Stopping and Range of Ions in Matter) /TRIM (TRansport of Ions in Matter) computer code with Monte Carlo method. Various Ag and Pd ion kinetic energies have been employed in this simulation. The results showed the Ag/SiC and Pd/SiC Ion Ranges, Doses, and Damage as the first-step evaluation to understand the corrosion phenomenon of the SiC-layer in the TRISO particles of HTGR

FAKTOR PENYEBAB DAN DAMPAK PAPARAN PESTISIDA TERHADAP KESEHATAN PETANI

Pendahuluan: Pestisida merupakan bahan kimia yang dapat menghilangkan hama dan dapat meningkatkan hasil pertanian, disamping efek menguntungkan juga dapat menimbulkan efek merugikan dari paparan pestisida pada manusia yakni dapat mempengaruhi kesehatan petani. Tubuh yang terpapar pestisida akan mengganggu pembentukan sel darah merah yang dapat berpengaruh pada penurunan kadar hematokrit dan sistem imun. Tujuan dari penelitian ini adalah untuk mengetahui faktor penyebab dan dampak paparan pestisida terhadap petani. Metode penelitian : Metode yang digunakan desain literature review yang memakai format PICOS dan menggunakan kata kunci “exposure pesticide” AND “exposed pesticide hematology”. Hasil yang diperoleh dari database Science Direct, Google Schoolar dan Spirnger sebanyak 40 jurnal kemudian difilter lagi untuk jurnal dalam kurun waktu lima tahun dan dengan permasalahan yang sama didapatkan jurnal sebanyak 3 judul. Hasil: Anemia adalah keadaan kadar hemoglobin (Hb) dalam darah kurang dari batasan normal yang berbeda untuk setiap kelompok usia dan jenis kelamin yang dapat disebabkan oleh kelainan pembentukan sel, pendarahan, ataupun gabungan ketiganya. Anemia juga berdampak pada kesehatan manusia, sama halnya dengan dampak yang diberikan dalam pembangungan sosial dan ekonomi. Pestisida adalah racun yang sangat berbahaya bagi manusia sehingga faktor keamanan pemakaian pestisida perlu mendapat prioritas. Idealnya pestisida dapat membunuh serangga pembawa penyakit dan hama pada tanaman, tetapi tidak beracun bagi manusia dan makhluk hidup lainnya yang bukan merupakan target. APD ) adalah suatu alat yang mempunyai kemampuan untuk melindungi seseorang yang fungsinya mengisolasi sebagian atau seluruh tubuh dari potensi bahaya di tempat kerja

COMPARATIVE ANALYSIS BETWEEN AHP MOORA AND AHP-ELECTRE METHOD FOR OPTIMAL ELECTRIC AND SOLAR-POWERED SHIPYARD SITE SELECTION

Transportation is the second largest emitter of CO2 in the world, accounting for 25% of total CO2 emissions. To achieve a zero-carbon shipping industry, Indonesia can use its high sun exposure to generate electrical energy by using solar cell technology, which converts solar energy into electrical power. To answer the challenge, this research will start with the site selection of electric and solar-powered shipyards. This research tries to solve the problem of selecting the best location for electric and solar-powered shipyards by using the Multi-Criteria Decision Making (MCDM) method. The purpose of this research is to get the optimal location of electric and solar shipyards using AHP-MOORA and AHP-ELECTRE methods. There are three alternative locations in the location selection. Alternatives 1 and 3 are in Paciran District, Lamongan Regency, East Java Province, and alternative 2 is in Serang Regency, Banten Province. Alternative site 1 has an area of 38 ha and is located in Sidokelar Village, Paciran Sub-district. Decision-makers determine the parameters that will be evaluated from each alternative location, such as slope, soil type, rainfall, and 18 other criteria. In determining the weighting of parameters, a method that has a consistency test is needed so that the weight results obtained are consistent and objective. The study result shows that alternative location 1 is the best location for the electric and solar-powered shipbuilding industry, the same conclusion using the AHP-MOORA Integration approach and the AHP weighting ELECTRE Integration approach

STUDI OKSIDASI PADUAN BAJA Fe-Ce-ZrO2 DENGAN METODE SINTESIS HIGH ENERGY MILLING DAN ULTRASONIC MENGGUNAKAN THEROGRAVIMETRI

STUDI OKSIDASI PADUAN BAJA Fe-Ce-ZrO2 DENGAN METODE SINTESIS HIGH ENERGY MILLING DAN ULTRASONIC MENGGUNAKAN THEROGRAVIMETRI. Telah dilakukan uji thermogravimetri untuk mempelajari perilaku oksida paduan baja komponen suhu tinggi Fe-Cr-ZrO2 sebagai aplikasinya pada komponen temperatur suhu tinggi. Penelitian ini mempelajari mengenai efek presetase chromium pada paduan yakni 20Cr dan 25Cr serta perbandingan metode sintesisnya yang menggunakan metode High Energy Milling (HEM) dan metode sonochemistry ultrasonic selama masing-masing 20 jam. Uji oksidasi dilakukan dengan Magnetic Suspension Balance (MSB) pada suhu 700oC selama 400 menit. Pengujian SEM-EDS dilakukan untuk menganalisa ketebalan lapisan oksida yang terbentuk beserta kandungan lapisan oksidanya. Didapatkan bahwa paduan dengan 25Cr memiliki lapisan oksida yang lebih rendah dibandingkan dengan 20Cr. Perbedaan metode sintesis juga memiliki pengaruh terhadap lapisan oksida yang terbentuk. Didapatkan bahwa lapisan oksida paduan dengan metode sintesis menggunakan metode ultrasonik memiliki pertambahan berat yang lebih besar dibandingkan sintesis menggunakan metode HEM. Selain itu, kandungan O dan C yang terbentuk lebih banyak dibanding paduan dengan sintesis HEM

Sintesis Nanopartikel Cobalt Ferrite (CoFe2O4) dengan Metode Kopresipitasi dan Karakterisasi Sifat Kemagnetannya

Magnetic nanoparticles of cobalt ferrite (CoFe2O4) have been synthesized by co-precipitation method with various synthesis temperature and concentration of NaOH. The structural characteristics and particle size of CoFe2O4 were determined by X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM), its showed that nanoparticles well crystallized with various grain size which depend on synthesis parameters. The grain sizes estimated using the Scherrer formula were found that the grain size increased with increasing temperature synthesis and decreasing concentration of NaOH. Magnetic characterization of CoFe2O4 nanoparticles was investigated by using a Vibrating Sample Magnetometer (VSM). Sample with various concentration of NaOH showed that coercivity was decrease with the decrease of particle size. In other hand, samples with various synthesis temperature found that sample with smallest grain size have high coersivity. The saturation magnetization increase when crystallinity increase. Based on the results, it can be concluded that magnetic characterization of CoFe2O4 was influenced by grain size and crystallinity. Keywords: nanoparticles, CoFe2O4, co-presipitation Nanopartikel magnetik Cobalt Ferrite (CoFe2O4) telah berhasil disintesis dengan metode ko- presipitasi dengan memvariasi parameter suhu dan konsentrasi NaOH. Struktur dan ukuran par- tikel hasil analisa X-Ray Diffraction (XRD) dan Transmission Electron Microscopy (TEM) menunjukkan bahwa nanopartikel mengkristal dengan baik dan ada ketergantungan ukuran bu- tir nanopartikel terhadap dua variasi parameter sintesis tersebut. Ukuran butir yang dihitung menggunakan persamaan Scherrer menunjukkan bahwa ukuran butir meningkat seiring pen- inggkatan suhu dan berkurangnya konsentrasi NaOH. Sifat kemagnetan CoFe2O4 hasil analisa Vibrating Sample Magnetometer (VSM). Sampel dengan variasi konsentrasi NaOH, semakin kecil ukuran butir nanopartikel, medan koersivitasnya semakin rendah. Sementara untuk sam- pel dengan variasi suhu, semakin kecil ukuran butir, medan koersivitasnya semakin tinggi. Ha- sil VSM juga menunjukkan bahwa semakin tinggi kristalinitas sampel, nilai magnetisasi satu- rasinya semakin tinggi. Dengan demikian dapat disimpulkan bahwa ukuran butir dan kristalini- tas mempengaruhi sifat kemagnetan nanopartikel CoFe2O4. Kata kunci: nanopartikel, CoFe2O4, kopresipitas

Identifikasi Awal Risiko Kecelakaan Seaplane Pada Bandar Udara Perairan

negara. Pergerakan seaplane selama proses keberangkatan dan kedatangan menggunakan bandar udara perairan. Fase penerbangan meliputi phase standing dan taxiing, approach dan landing, en route dan take off. Setiap  aktivitas operasi  penerbangan tidak  lepas dari resiko. Oleh karena itu, identifikasi awal resiko kecelakaan pada seaplane di bandar udara perairan perlu dilakukan. Hal ini dilakukan untuk mendapatkan faktor resiko yang mempegaruhi keamanan dan keselamatan Seaplan di bandar udara perairan. Data yang digunakan bersumber dari Aviation Safety Network. Teknik analisa menggunakan metode analisis statistik dan cause Effect. Dari data tahun 2000 – 2020 tercatat 374 kecelakaan seaplane. Fase approach dan landing yang tertinggi sebesar 141 kecelakaan, enroute sebesar 114 kecelakaan, Take Off sebesar 76 kecelakaan dan Standing dan Taxiing sebesar 30 kecelakaan. Penyebab kecelakaan terbesar karena kehilangan kendali seaplane sebesar 122 kecelakaan