IDENTIFIKASI POTENSI, DAMPAK DAN PENGENDALIAN LINGKUNGAN DALAM PENGEMBANGAN PEMBANGKIT LISTRIK TENAGA NUKLIR

Untuk menjaga keberlanjutan pembangunan di segala bidang guna memenuhi kebutuhan kesejahteraan manusia, dimana penggunaan energi sangat terkait erat, maka secara otomatis kecukupan persediaan energi secara berkelanjutan untuk generasi kini maupun yang akan datang harus terjamin dan dipertahankan. Oleh karena itu perlu dilakukan pencarian energi alternatif dalam rangka mendukung konsep pembangunan berkelanjutan yang berdampak pada kesejahteraan sosial, ekonomi dan tetap menjaga kestabilan dan kelestarian lingkungan. Salah satu alternatif pembangkitan energi yang dikembangkan adalah pembangkit listrik tenaga nuklir ( PLTN). Indonesia memerlukan pembangkit­ listrik baru untuk memenuhi kenaikan kebutuhan listrik di masa yang akan datang. Di AS, untuk tahun 1990, Pembangkit Listrik Tenaga Nuklir (PL TN) dan Pembangkit Listrik Tenaga Uap Batubara (PLTU) berkontribusi masing-masing 12,5% dan 55% dari total pembangkitan listrik, suatu angka yang lebih besar dari kontribusi jenis-jenis sumber energi lain. Kata Kunci: Pembangkit Listrik Tenaga Nuklir, Pembanguna

Vo2Max and Agility to Futsal Dribbling Technique Skills

This study aims to determine the effect of VO2max and agility on basic futsal technical skills. This study is a regression correlation study on how much influence the VO2max variable and the agility variable have on dribbling skills. The study population was the students who took futsal extracurricular activities at SMP Negeri 9 Malang. The samples were taken by random sampling. The number of samples used was 35 students who took futsal extracurricular activities. The results of this research partially indicate that there is a negative and significant effect (p> 0.05) of VO2max on ball dribbling skills as indicated by the t test results of -8.969 with a regression coefficient of -0.135, and agility towards ball dribbling skills is shown from the t test results of 2,416 with a regression coefficient of 2,333. There is a significant effect (p <0.05) of agility on ball dribbling skills as indicated by the t test results of 2.416 with a regression coefficient of 0.106. Meanwhile, simultaneously (simultaneously) on the ball dribbling skills a significant effect is shown by the F value of 51.477. Based on the results of data analysis in research on VO2max and agility towards ball dribbling skills, it can be concluded that collectively (simultaneously) there is a significant effect on the level of cardiovascular endurance (VO2Max) and Agility on the dribbling skills of futsal extracurricular members of SMP Negeri 9 Malang

GAME-BASED BACKHAND TENNIS TECHNIQUE LEARNING MODEL TO IMPROVE LEARNING OUTCOMES

The purpose of this study is to find out a learning model using a game-based tennis backhand skill model. The method used is  Research & Development with mixed methods research approach that combines qualitative and quantitative methods. It is intended to be able to reach or process all data or information so that a comprehensive explanation will be obtained. The number of samples as many as 20 respondents.  The steps taken in the trial include: (1) establishing a group of research subjects (2) Carrying out Pretest (3) trying the model that has been developed (4) carrying out  post-test  (5) looking for the average score of pretest  and  posttest and compared between the two (6) looking for the differences between the two averages through statistical methods (t-test) to find out whether or not there is a significant influence of the use of the model.  The conclusion of this study is that  game-based tennis  backhand  learning model can be developed and applied in the process of learning backhand  techniques of tennis effectively and efficiently. &nbsp

Effectiveness of a Cassava Peel Adsorbent on the Absorption of Copper (Cu2+) and Zinc (Zn2+) Metal Ions

Cassava peel waste can be used as an adsorbent to remove heavy metal pollution from industrial liquid waste. This study aims to determine the effect of the mesh size and operational temperature of a cassava peel adsorbent on the adsorption of heavy metal ions of copper (Cu2+) and zinc (Zn2+). This study concerns on the ability to absorb the heavy metals copper (Cu2+) and zinc (Zn2+), the characteristics of the adsorbent (functional group), and the adsorption capacity for isothermal adsorption using the Langmuir and Freundlich models. The cassava peels were crushed, dried, ground and sieved with 80, 100 and 120 mesh sieves. The cassava peel powder was activated with HNO3 and used to absorb metal ions from the model liquid waste at different temperatures of 35°C, 45°C and 55°C. The cassava peel adsorption process was analyzed using AAS, SEM and FT-IR analyses. The results of the study showed that the optimum conditions for the cassava peel adsorbent to absorb copper (Cu2+) and zinc (Zn2+) metal ions are 120 mesh in size and an operating temperature of 35°C to obtain adsorption values of 55.19% for copper (Cu2+) and 41.7% for zinc (Zn2+). Functional groups present in the cassava peel adsorbent include O-H, N-H, C=O, and C–N. Among the two widely used isotherms tested (i.e., Langmuir and Freundlich models), the experimental data were found to mostly closely resemble the Freundlich isotherm

Fabrication of the Ti/SiC Based Composites by Self-Propagating High Temperature Synthesis

Metal matrix composites (MMC) consists of matrix and reinforcement. Aluminium (Al) and titanium (Ti) are mostly used as a matrix, while ceramics like silicon carbide (SiC) play role as a reinforcement where magnesium (Mg) act as wetting agent. Al/Ti alloys often used in the applications of powder-shaped. Nevertheless these materials are very suitable for the processes that are using a simple and novel method called self-propagating high temperature synthesis (SHS). Based on it, some of the advanced materials such as alloys, advanced ceramics and intermetallic compounds have been focused on SHS process. The SHS compacting process is carried out in stages according of the temperatures helping by compacting force applied. Our research work will be focused on the fabrication composites based Ti/SiC by using SHS process. The microstructure of the Ti/SiC based composites was investigated by using optical microscope. The micro-hardness testing device has been used to determine the mechanical properties of Ti/SiC based composites. The relationships between reaction of the Ti and SiC have been investigated to obtain the value of the composite properties and the bond between Ti and SiC. Ti/SiC based composites were obtained with improved properties

MODEL PEMBELAJARAN SHOOTING FUTSAL UNTUK SISWA SMA

Penelitian ini bertujuan untuk menghasilkan model pembelajaran shooting futsal untuk siswa SMA, serta bertujuan untuk menguji efektivitas model pembelajaran ini. Penelitian ini adalah penelitian pengembangan (research dan development) yang teridiri dari sepuluh langkah (1) Penelitian dan mengumpulkan informasi (2) perencanaan (3) pembuatan produk (4) evaluasi ahli (5) revisi (6) uji kelompok kecil dengan menggunakan 30 subjek (7) revisi (8) uji coba kelompok besar menggunakan 60 subjek (9) revisi produk akhir (10) desiminasi dan implementasi. Data dikumpulkan melalui kegiatan observasi, pengisian kuesioner dan tes keterampilan shooting futsal untuk mengetahui peningkatan shooting futsal pada siswa SMA yang menggunakan model pembelajaran shooting futsal untuk siswa SMA. Berdasarkan hasil uji efektifitas model dengan menggunakan metode eksperimen dan pendekatan the one group pretest-posttest design. Sample dalam uji efektivitas ini adalah kelas eksperimen berjumlah 30 orang siswa SMA yang diberi model pembelajaran shooting futsal untuk siswa SMA. Hasil perhitungan statistika dengan menggunakan paired sample t test untuk eksperimen menunjukan nilai signifikansi 0,000<0,05 kesimpulan dari hasil penelitian ini adalah model pembelejaran shooting futsal untuk siswa SMA dan efektive digunakan sebagai model pembelajaran shooting futsal untuk siswa SMA

The employees and shareholders pressure on environmental accounting reporting practice in small and medium enterprises: evidence from China

The small and medium enterprises (SMEs) in China have achieved rapid and sustainable growth for more than three decades. Such growth has increasingly contributed to China's economic development. Yet, the public's sensitivity to environmental issues is increasingly demanding more research to be conducted on environmental topics. Therefore, the objective of this study is to examine the pressure of internal stakeholders, namely shareholders and employees of SMEs in Shanxi Province in China towards the need to comply with environmental accounting reporting. One hundred and fifty copies of questionnaires were distributed; one hundred twenty-nine ready copies were subsequently collected. The data were then analyzed by utilizing Partial Least Squares-Structural Equation Modeling (PLS-SEM) using SmartPLS 3.2.9. The results showed that employees of SMEs in Shanxi Province in China were able to pressure their employers to implement environmental accounting reporting. The insights of this study prove that employees of SMEs in Shanxi Province were serious on environmental issues as environmental accounting reporting can improve SMEs performances concerning the environment, inventory and controlling costs, more efficient technologies with less pollution, non-polluting products, etc

KONVERSI LIMBAH TANDAN KOSONG KELAPA SAWIT MENJADI GLUKOSA DENGAN PROSES HIDROTERMAL TANPA MELALUI PROSES PRETREATMENT - (Conversion of Waste Palm Oil Empty Fruit Bunches into Glucose using Hydrothermal Process without Pretreatment)

Palm oil empty fruit bunch (EFB) is a waste from palm oil industry and commonly used as compost for soil breeding. EFB could be hydrolized into glucose using hydrothermal process with hydrochloric acid as catalyst.  Eight gram of EFB in particle sizes (–30+40) mesh were hydrolyzed with HCl 10% 80 mL in a tube reactor. Reaction time were 2, 3 and 4 hours in temperature range 140-240oC. EFB decomposition did not increase despite of higher temperature while reaction time influenced the process significantly. EFB conversion was 47% in 4 hours and 240oC while in 3 hours resulted 34% same with 2 hours in 210oC. EFB decomposition did not influence glucose yield which was 23% in 2 hours  170oC, 24% in 3 hours 160oC and 6% in 4 hours 150oC. The optimum conditions of conversion were 2 and 3 hours with temperature range 150-170oC.Keywords: conversion, EFB, glucose, hydrothermal, pretreatment ABSTRAKLimbah tandan kosong kelapa sawit (TKKS) merupakan hasil samping dari industri minyak sawit dan terdapat dalam jumlah banyak. Sampai saat ini belum termanfaatkan dengan baik, biasanya dipakai sebagai kompos untuk pemuliaan tanah perkebunan sawit. Persentase TKKS sebesar 23% dari tandan buah segar (TBS) dengan komponen utama berupa selulosa, hemi-selulosa dan lignin. TKKS bisa dihidrolisis menjadi gula atau glukosa dengan proses hidrotermal menggunakan katalis asam klorida. TKKS  seberat 8 g dengan ukuran partikel (–30+40) mesh dikonversi secara hidrotermal pada reaktor tabung dengan penambahan 80 ml HCl 10% sebagai katalis, waktu reaksi 2, 3 dan 4 jam, suhu reaksi dari 120–240oC. Proses peruraian TKKS tidak menunjukkan kenaikan yang berarti walaupun suhu reaksi semakin tinggi. Waktu reaksi memberi pengaruh yang lebih besar terhadap peruraian TKKS dimana peruraian paling tinggi sebesar 47% pada suhu 240oC dan waktu reaksi 4 jam. Pada waktu reaksi 3 jam dihasilkan peruraian TKKS paling tinggi sebesar 34%, sama dengan hasil pada waktu 2 jam dan suhu 210oC.  Glukosa yang dihasilkan tidak seiring dengan TKKS yang terurai. Pada waktu reaksi 2 jam dan suhu reaksi 170oC dihasilkan glukosa sebesar 23% sedangkan pada waktu reaksi 3 jam dengan suhu reaksi 160oC dihasilkan glukosa paling tinggi 24% dan pada waktu reaksi 4 jam dengan suhu 150oC dihasilkan glukosa sebesar 6%. Kondisi terbaik untuk mendapatkan jumlah glukosa paling banyak yaitu pada waktu reaksi antara 2 dan 3 jam dengan suhu antara 150 dan 170oC.Kata kunci: glukosa, hidrotermal, konversi, pretreatment, TKK

The 4CS in harm reduction programmes: a case of needle syringe exchange programme using total quality management / Sharifah Fadzlon Abdul Hamid … [et al.]

This paper intends to study the costs associated with harm reduction. Harm reduction is a way of dealing with behavior that damages the health of the persons involved and their community. Many individuals acquire these damaging behaviours (for example, smoking, drinking too much alcohol, practicing un-safe sex and drug abuse) are well aware of the adverse consequential effects on their health. Needle Syringe Exchange Programme (NSEP) is one such harm reduction programme recommended by the WHO (World Health Organization) to the Ministry of Health in Malaysia in 2005 and has produced encouraging results. Using the concept of Total Quality Management (TQM), the researchers identified and classified the costs involved in the harm reduction programme. The main principle of TQM with its emphasis on the cost of prevention is highly relevant in harm reduction programmes, which is similar to its emphasis on ‘prevention is better than cure’. Hence, this management accounting model which the researchers termed the 4Cs (currently in the process of being trademarked) is highly relevant and applicable in any harm reduction programme