RANCANG BANGUN JIG AND FIXTURE BOR 45 DERAJAT (PERANCANGAN)

Laporan ini berjudul Rancang Bangun Jig and Fixture Bor 45 Derajat. Jig and fixture adalah alat pemegang benda kerja produksi yang digunakan dalam rangka membuat penggandaan komponen secara akurat. Untuk mendapatkan hasil pekerjaan yang baik dalam produksi, tentunya harus adanya keserasian dalam hal posisi dari benda kerja dengan mesin yang digunakan. Untuk melakukan ini, maka digunakan jig and fixture yang didesain untuk memegang, menyangga dan memposisikan setiap bagian sehingga setiap permesinan dilakukan sesuai dengan batas spesifikasi. Rancang Bangun Jig and Fixture Bor 45 Derajat. Alat ini mempunyai fungsi untuk menepatkan mata bor pada bagian benda kerja yang telah dipotong terlebih dahulu dengan sudut 45 derajat untuk dilakukan pengeboran, dengan dibantu bushing dan jig bor yang telah dibuat untuk mengurangi getaran pada proses pengeboran serta menghindari terjadinya perubahan posisi pada saat dilakukan pengeboran. Dalam proses pembuatannya, Rancang Bangun Jig and Fixture Bor 45 Derajat ini menggunakan gerinda potong, mesin bor dan alat perkakas kerja bangku lainnya. Alat ini memiliki prospek yang bagus kedepannya, untuk itu akan lebih baik lagi jika dilakukan beberapa pengembangan kedepannya agar fungsi kerja alat ini dapat lebih optimal

Obstacles au don bénévole de sang dans la population de Kisangani en République Démocratique du Congo

Introduction: Plusieurs facteurs font obstacles au don de sang dans les pays en développement. La  présente étude avait pour objectifs d'analyser les connaissances, attitudes et pratiques de la population  de Kisangani relatives au don de sang et d'identifier les obstacles au don de sang afin de guider la planification des activités de promotion du don de sang. Méthodes: L' enquête a été réalisée du 4 février au 27 août 2008 sur un échantillon de 1067 sujets par entretien. Résultats: Sur 1067 sujets interviewés, 1002 (93.9%) sujets ont accepté de répondre. La plupart de nos enquêtés (81.5%, n=1002) avait connaissance de la pratique du don bénévole de sang à Kisangani.  Quoique la majorité des sujets approuvent la pratique du don de sang, 57.9 % (n=416) parmi eux n'ont  jamais fait un don de sang. La raison principale avancé par ceux qui n'ont jamais fait un don de sang était  qu'ils n'avaient pas été sollicités tandis que 35 % (n=144), quoique sollicités, avaient refusés de faire un  don de sang pour diverses raisons.Conclusion: Cette enquête met en lumière le fait qu'il y a maintenant dans la population de Kisangani une attitude favorable au don de sang. Mais plusieurs obstacles empêchent encore le passage à l'acte. Des activités de promotion qui s'appuient sur la communication interpersonnelle devraient être mises sur  pieds afin de passer des messages personnalisés aux donneurs potentiels de sang.Key words: Transfusion, don de sang, Connaissance, attitudes, pratiques, République Démocratique du Cong

PENGARUH INTELLECTUAL CAPITAL TERHADAP KINERJA KEUANGAN (Studi Pada Perusahaan Non Keuangan yang Terdaftar di Bursa Efek Indonesia Periode Tahun 2012 – 2014)

This study has the main purposeA tBoS tTesRt AthCeT e ffect of the components of intellectual capital (VAICTM), namely CEE (Capital Employed Efficiency) HCE (Human Capital Efficiency), SCE (Structural Capital efficieny) on financial performance projected by ROA (Return on Assets), ROE (Return on Equity), ATO (Assets Turnover), and GR (Growth Rate) in non-financial companies listed on the Indonesian Stock Exchange (BEI) in the period 2012-2014. This research was conducted by using Partial Least Square (PLS) for data analysing. The research sample are 82 non-financial companies listed in the Indonesia Stock Exchange in 2012-2014. The requirements are companies with stable profit in 3 years, have enough component for calculating Value Added (VA), and have IDR (Rupiah) as the currency for financial report. The findings of this study is to indicate that there is a positive effect of intellectual capital components (VAICTM) on the financial performance of the company. Components of IC (VAICTM) also affect future financial performance. Overall, the empirical findings of this study stated that CEE (Capital Employed Efficiency) and SCE (Structural Capital efficieny) is a significant indicator for VAICTM on financial performance in the same year, CEE is a significant indicator of financial performance in the future. Limitations of this study is the use of all non-financial companies which qualify the needs assessment value added (value added) for 3 consecutive years - participated

Thermalization in one- plus two-body ensembles for dense interacting boson systems

Employing one plus two-body random matrix ensembles for bosons, temperature and entropy are calculated, using different definitions, as a function of the two-body interaction strength \lambda for a system with 10 bosons (m=10) in five single particle levels (N=5). It is found that in a region \lambda \sim \lambda_t, different definitions give essentially same values for temperature and entropy, thus defining a thermalization region. Also, (m,N) dependence of \lambda_t has been derived. It is seen that \lambda_t is much larger than the \lambda values where level fluctuations change from Poisson to GOE and strength functions change from Breit-Wigner to Gaussian.Comment: 7 pages, 4 figure

A new method to search for a cosmic ray dipole anisotropy

We propose a new method to determine the dipole (and quadrupole) component of a distribution of cosmic ray arrival directions, which can be applied when there is partial sky coverage and/or inhomogeneous exposure. In its simplest version it requires that the exposure only depends on the declination, but it can be easily extended to the case of a small amplitude modulation in right ascension. The method essentially combines a $\chi^2$ minimization of the distribution in declination to obtain the multipolar components along the North-South axis and a harmonic Rayleigh analysis for the components involving the right ascension direction

Prévalence du portage asymptomatique du plasmodium chez les donneurs bénévoles de sang à Kisangani, République Démocratique du Congo

Introduction: Le paludisme transfusionnel est une réalité en Afrique Sub-saharienne, en raison des  transfusions sanguines répétées, peu ou non contrôlées et où les donneurs sont en majorité  potentiellement porteurs d'hématozoaires. L'objectif de cette étude était de déterminer la prévalence du portage asymptomatique du plasmodium chez les donneurs bénévoles de sang à Kisangani.Méthodes: Une étude transversale a été menée au Centre Provincial de Transfusion Sanguine à  Kisangani  du 1er Décembre 2012 au 31 Mars 2013 et a concerné 480 donneurs bénévoles de sang.Résultats: La prévalence du portage asymptomatique du plasmodium chez les donneurs bénévoles de sang était de 28,3%. Plasmodium falciparum était l'espèce la plus répandue (96,3%). Près de la moitié des donneurs avait une parasitémie supérieure à 2000 parasites/μl. Les facteurs qui étaient  significativement associés à la parasitémie étaient le jeune âge, le 1er don, et la non utilisation de lamoustiquaire imprégnée d'insecticide à longue durée (MILD).Conclusion: Les résultats de cette étude montrent que la prévalence du portage asymptomatique du plasmodium chez les donneurs bénévoles de sang était élevée, constituant ainsi un risque important de transmission du parasite aux receveurs  souvent en mauvais état général. Cependant, l'utilisation de la MILD et la fidélisation des donneurs  bénévoles semblent constituer des moyens utiles de réduction du risque de portage asymptomatique du Plasmodium. Une sensibilisation et éventuellement des  distributions ciblées de MILD aux donneurs, en particuliers les plus jeunes, pourraient réduire  considérablement le portage du Plasmodium parmi les donneurs de sang et ainsi réduire le risque de paludisme transfusionnel.Key words: Paludisme, Prévalence parasitaire, Donneur bénévole de sang, Transfusion sanguine, République Démocratique du Congo

Bayesian analysis of Multivariate Stochastic Volatility models

Paper presented at the 4th Strathmore International Mathematics Conference (SIMC 2017), 19 - 23 June 2017, Strathmore University, Nairobi, Kenya.Multivariate stochastic volatility (MSV) models have gained applicability in Time Series (TS) data for analyzing multivariate financial and economic time series because they capture the volatility dynamics. Bayesian prior works allow analysis of MSV models to provide parsimonious skew structure and to easily scale up for high-dimensional problem. Bayesian MCMC estimation are used for high dimensional problems because it’s a very efficient estimation method, however, it is associated with a considerable computational burden when the dimensionality of the data is moderate to large. Forward-filtering backward-sampling (FFBS) algorithm by sampling is used as it considers reparameterizations. This is applied directly to heteroscedasticity estimation for latent variables. To show the effectiveness of this approach, we apply the model to a vector of daily exchange rate data from Central Bank of Kenya

Bayesian estimation of Multivariate Stochastic Volatility by applying state space models

Paper presented at the 4th Strathmore International Mathematics Conference (SIMC 2017), 19 - 23 June 2017, Strathmore University, Nairobi, Kenya.This work seeks to apply a Bayesian analysis in estimating multivariate stochastic volatility (MSV) using state space models. A multiplicative model based on inverted Wishart and multivariate singular beta distributions is proposed for the evolution of the volatility, and a flexible sequential volatility updating is employed. Being computationally fast, the resulting estimation procedure is particularly suitable for on-line forecasting. Bayesian MCMC is applied to estimate high dimensional problems. Three test are conducted on estimates: the log likelihood criterion, the mean of standardized one-step forecast errors, and sequential Bayes factors. The test and procedure are applied in real data set that will comprise ten exchange rate Kenyan shillings versus other currencies in Nairobi stock exchange

The Abundance of Lactic Acid Bacteria in the Gastrointestinal Tract of Lake Victoria Nile Perch

This study was carried out to determine the presence and abundance of lactic acid from gastrointestinal tracts of Latesniloticus fish with the specific objective of determining fish size effect on lactic acid bacteria (LAB) population. The study was conducted in Lake Victoria between April-June and July-September, 2014. Statistical analysis was performed by using Minitab 9.1.3 software version. Analysis of Variance (ANOVA) and east significant difference (LSD) was used for statistical comparisons. Differences were considered significant at α=0.05 level.  The average weight of small fish sampled during the wet season was 667.9g that gave an average colony forming units/g of 9.2x 103; medium averaging 1485.1g had an average of 2.1x104cfu and big averaging 3210.8g had 4.9 x 104cfu. In the dry spells, the small fish averaging 614.6g had 6.7 x 103, medium averaging 1392.9g had an average of 1.7x104cfu and big averaging 2756.3g had 3.4 x 104cfu. The mean of counts of LABs are significantly different for the three sizes tested, with the big size giving the highest followed by medium and small respectively. This could be due to ability to access more variety of foods. The means of counts of LABs are insignificantly different for the eight sites tested. The mean of counts of LABs are significantly different for the wet and dry seasons tested. In conclusion, this study showed availability of lactic acid bacteria in the gut of Lake Victoria Nile perch which can be used as a source of potential bio preservative. Key words: Lactic Acid Bacteria (LAB), Gastrointestinal tracts, Nile perch, L. Victoria, ANOVA

Seroprevalence of hepatitis B and C virus infections among diabetic patients in Kisangani (North-eastern Democratic Republic of Congo)

Introduction: the link between diabetes mellitus and hepatitis B and C Virus infections has not yet been studied in the Democratic Republic of Congo, a country where diabetes mellitus is a growing disease and the prevalence of hepatitis B and C viruses infections is high. The aim of this study was to determine the seroprevalence of these viruses in diabetic patients. Methods: we conducted a descriptive cross-sectional study in diabetic subjects attending Kisangani University Clinics and General Hospitals of Kisangani City as well as the Diabetics Association of Oriental Province. The control group consisted of volunteer blood donors recruited from the Kisangani Provincial Blood Transfusion Center. Blood glucose was measured with the spectrophotometer; for hepatitis B and hepatitis C viruses serology, we used rapid test kits (Determine TM® HBsAg and Hexagon® HCV test) and ELISA if seropositivity by rapid tests. The analysis was done by SPSS software. Results: seroprevalence of hepatitis C virus in diabetics was 24.8% compared to 1.9% in volunteer blood donors (p = 0.0000); that of hepatitis B virus was 3.4% versus 3.5% in volunteer blood donors (p = 0.906). Hepatitis C virus infection was more common in type 2 diabetics (p = 0.006) and significantly associated with age of diabetic patients (p = 0.002). Conclusion: the seroprevalence of hepatitis C virus and not hepatitis B virus infection is significantly high in diabetic subjects, particularly type 2 diabetics, in the Democratic Republic of Congo and suggests systematic screening for this infection in any diabetic patient