Double-core evolution and the formation of neutron-star binaries with compact companions

We present the results of a systematic exploration of an alternative evolutionary scenario to form double neutron-star binaries, first proposed by Brown (1995), which does not involve a neutron star passing through a common envelope. In this scenario, the initial binary components have very similar masses, and both components have left the main sequence before they evolve into contact; preferably the primary has already developed a CO core. We have performed population synthesis simulations to study the formation of double neutron star binaries via this channel and to predict the orbital properties and system velocities of such systems. We obtain a merger rate for DNSs in this channel in the range of 0.1 - 12/Myr. These rates are still subject to substantial uncertainties such as the modelling of the contact phase.Comment: MNRAS, accepte

Comparative Study of Milk Production and Feed Efficiency Based on Farmers Best Practices and National Research Council

This study aimed to compare local dairy farmer ration formula with national research council in producing higher feed efficiency and milk production. This study had two stages. The first stage was in vitro study of dairy farmer rations which have different raw materials (R3, R4, and R5) with NRC based ration (R2) and Demo Farm ration (R1). The variables measured in this stage were proximate composition, volatile fatty acid, ammonia, dry matter and organic matter digestibility. The first stage used a randomized block design with five treatments, three groups of ruminal fluid, and three replications. The second stage used nine lactating cows with three periods of lactation (one, three, and other) and used a randomized block design with three treatments, three groups, and one replication. Parameters measured were dry matter intake, manure score, milk production, body weight gain, body condition score, and technical and economical efficiencies. The first stage result showed that R1, R2, and R3 were three best rations in nutrient composition and fermentability (ammonia and volatile fatty acid concentrations were optimum for microbial growth and high digestibility), so in conclusion those three rations were the best rations and should be compared by in vivo method. The result of the second stage showed that all tested rations were not significantly different in milk production, performance and efficiency, so in conclusion those three rations have the same quality

The Correlation Between Eating Utensils and Place of Sales in the Contamination of Escherichia Coli in Food Sold at Campus Food Stalls

Up to now, in general, the safety of food that is sold at any canteens in the campuses, the eating utensils are handled and the food stalls are managed are still uncertain. This research was aimed to understand the correlation between the eating utensils handling and the contamination of Escherichia coli (E. coli) in the food sold by the food vendors in the campus. The cross-sectional design research applied on the food stalls in the university campus in Depok with a total number of 173 consumers as respondents. The variables observed as independent variables were the sanitation of the eating utensils and the sanitation of the dining place. The examination method of the Most Probable Number (MPN) for E. coli was conducted to assess the food’s hygiene. The data analyzed using the chi-square test and followed by the logistic regression. The result showed that more than half of the food samples (59.54%) were contaminated by E. coli. The storage place of the eating utensils was most significantly correlated with the E. coli contamination of the served food with an OR=0.45 (0.21-0.87). Therefore, it is necessary to promote the awareness of this risk and reinforce supervision by the Health Authorities and by the management of the place of sales to provide guidance to the food vendors and to the consumers as well. Further research is recommended to observe the E. coli contamination through clean water, eating utensils, the hands of the consumers and the napkins used to wipe dry the eating utensils

Frontal Facial Symmetry Detection Using Eigenvalue Method

Facial symmetry is correspondence of face components on the both sides of face, left and right of a dividing line or about a center or an axis. Most of the research use face component like eyes, nose and ears component to identify facial symmetry. In this paper we suggest to add mouth as another face component to increase accuracy in facial symmetry detection. The results of facial symmetry detection are used for authentication process, analysis in medical, psychology and anthropology scope. By using MATLAB 7.1 we develop a program that can analyze face,asymmetry or not with utilizing eigenvalue. The contribution of this analysis is to know whether eigenvalue is suitable or not in analyzing facial symmetry

Aspek Hukum Penerapan Persetujuan Penghindaran Pajak Berganda Internasional

Transaksi Internasional diperlukan oleh setiap negara, sebab dengan adanya transaksi Internasional suatu negara akan memiliki peluang untuk meningkatkan pertumbuhan ekonominya. Melalui perdagangan Internasional ini pula, suatu negara akan memiliki kemampuan untuk memperluas kemungkinan konsumsinya. Perdagangan Internasional timbul karena adanya perbedaan di dalam permintaan maupun penawaran, yang disebabkan oleh perbedaan incomeper kapita, selera masyarakat, jumlah, atau kualitas faktor-faktor produksi, dan faktor lain yang memengaruhi produksi atau suplai, serta adanya excess supply (kelebihan stok) di pasar dalam negeri

Harmonisasi Pengaturan Tentang Pembentukan Dan Pembubaran Serikat Pekerja/serikat Buruh Dalam UU No. 21 Tahun 2000 Tentang Serikat Pekerja/serikat Buruh Terhadap UU No. 17 Tahun 2013 Tentang Organisasi Kemasyarakatan

Penelitian ini bertujuan untuk menganalisis alasan terjadinya inkonsistensi dalam pengaturan tentang pembentukan dan pembubaran serikat pekerja/serikat buruh dalam UU No. 21 Tahun 2000 tentang Serikat Pekerja/Serikat Buruh (UU Serikat Pekerja/Serikat Buruh) terhadap UU No. 17 Tahun 2013 tentang Organisasi Kemasyarakatan (UU Ormas). Penelitian ini merupakan jenis penelitian normatif yang dilakukan dengan menggunakan metode pendekatan Perundang-undangan, perbandingan hukum, dan sejarah.Hasil penelitian ini adalah ditemukannya definisi ormas yang terlampau luas dalam UU Ormas yang juga mencakup pengertian serikat pekerja/serikat buruh di dalamnya sehingga berdampak pada adanya beberapa pasal dalam UU Ormas yang inkonsistensi denganUU Serikat Pekerja/Serikat Buruh. Alasan utama terjadinya inkonsistensi tersebut adalah kesalahan pembentuk undang-undang dalam merumuskan definisi ormas sehingga mengakibatkan adanya ketidakjelasan mengenai makna ormas, dimana yang dimaksud dengan ormas adalah semua organisasi yang dibentuk oleh masyarakat, termasuk serikat pekerja/serikat buruh, walaupun serikat pekerja/serikat buruh tidak pernah digolongkan sebagaiormas.Selain itu, maksud dari dibentuknyaUU Ormas untuk menggantikan UU Ormas yang lama juga tidak relevan apabila dihubungkan dengan tujuan dibentuknya UU Ormas untuk mengatur dan menertibkan ormasyangsemakin banyak serta ormasyang identik dengan kekerasandalam melakukan kegiatannya. Alasan-alasan tersebut berdampak pada adanya hak-hak masyarakat untuk berserikat, berkumpul, dan mengemukakan pendapat menjadi terganggu

Dehumanization of Teaching and Learning Activities on Social Science Subject

This research aims to describe factors that influence dehumanization of teaching and learning processes. The population of this research was 158 students. The research used a proportional cluster random sampling and 40 students were analyzed as samples. Data were collected by using documentation, observation and questionnaire. The data then quantitatively and qualitatively classified due to the influence of teaching and learning factors on Social Science subject in order to draw the conclusion easily. Findings show that the influence of dehumanization factors on teaching and learning processes are teaching method by 77.9%, curriculum factor by 85%, teacher-student relationship by 63.7%, school discipline by 75.4%, homework by 65.4%, school time by 63.7%, learning equipment by 70.8%, over-standard lesson by 81% and building condition by 80%. The most dominant factor influencing the dehumanization of teaching and learning processes is curriculum by 85%. Thus, teachers are required to improve their competences and capabilities to create a more humanistic teaching learning processes which are more appropriate to the goals of education. In order to achieve the goals, it is recommended to the school administrators to improve the facilities and infrastructure for more conducive teaching and learning processes with more representative spaces and facilities

Efektifitas Computer Aided Learning (Cal) dalam Pembelajaran Kosakata Bahasa Inggris Siswa Sekolah Dasar

Advances in technology encourage the use of technology in teaching and learning process. The use of technology in the learning process is rapidly gaining popularity along with the development of information technology which is a supporting factor in the development of education and also to provide innovative solutions to the problems faced. Computer Aided Learning (CAL) is a method of approach to teaching and learning activities with the help of computer technology as an auxiliary medium is used to help learners understand the subject matter ranging from displays and provide reinforcement material also as a tool to assess learning achievement in which the material is packaged in the form software (software). Besides using CAL to learners will be able to interact with the interactive learning program that is available so they can learn to follow the ability of each learner and can also repeat a topic they have not understood the lessons step by step. By using CAL, students become more independent in learning, because the learning process not only depends on the teacher