1,143 research outputs found

    Sound radiation from a perforated plate

    No full text

    ANALISIS KEBUTUHAN PUKULAN BULUTANGKIS PEMAIN TUNGGAL PUTRA USIA 17-19 TAHUN PADA KEJUARAAN NASIONAL BULUTANGKIS DI SURAKARTA TAHUN 2012

    No full text
    Nurul Huda Dwi W. ANALISIS KEBUTUHAN PUKULAN BULUTANGKIS PEMAIN TUNGGAL PUTRA USIA 17-19 TAHUN PADA KEJUARAAN NASIONAL DI SURAKARTA TAHUN 2012. Skripsi, Surakarta : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta. Juli 2013. Tujuan penelitian ini adalah untuk mengetahui seberapa banyak kebutuhan pukulan (Servis panjang, Servis pendek, Lob, Smash, Dropshoot, Netting, dan drive) dalam pertandingan bulutangkis pada pemain tunggal putra pada tingkat kejuaraan nasional. Agar dalam pemberian dosis latihan dapat sesuai dengan kebutuhan saat pertandingan yang sebenarnya. Penelitian ini menggunakan metode deskriptif dengan teknik pendekatan analisis kuantitatif. Subyek penelitian ini adalah pemain tunggal putra pada Kejuaraan Nasional Bulutangkis di Surakarta tahun 2012 berjumlah 53 atlet. Sumber data dari penelitian ini adalah data yang terdokumentasikan oleh peneliti yang telah melakukan survey di lapangan dan mencatat setiap pukulan yang dilakukan oleh pemain tunggal putra, selain itu peneliti juga mengambil data yang terdokumentasikan oleh Bidang penelitian dan pengembangan prestasi (Litbang) PBSI pada kejuaraan nasional PBSI di Surakarta khususnya pertandingan nomor tunggal putra. Teknik analisis data yang digunakan adalah persentase. Hasil penelitian menunjukkan bahwa persentase pukulan yang dilakukan oleh pemain tuggal putra usia 17-19 tahun pada kejuaraan nasional bulutangkis di Surakarta tahun 2012 adalah sebagai berikut : (a) servis panjang : 1,08%, (b) servis pendek : 14,01%, (c) lob : 27,91%, (d) netting : 29,40%, (e) dropshoot : 8,59%, (f) smash : 11,78%, (g) drive : 7,23%. Dalam satu game terjadi rata-rata pukulan servis panjang sebanyak 5 kali, servis pendek 65 kali, lob 130 kali, netting 137 kali, dropshoot 40 kali, smash 55 kali, drive 34 kali, sehingga total pukulan sebanyak 467 kali dan terjadi rata-rata in-play sebanyak 71 kali. Dalam satu set terjadi rata-rata pukulan servis panjang sebanyak 2 kali, servis pendek 31 kali, lob 62 kali, netting 66 kali, dropshoot 19 kali, smash 26 kali, drive 16 kali, sehinga total pukulan sebanyak 233 kali dan terjadi rata-rata in-play sebanyak 34 kali. Dalam satu inplay terjadi rata-rata pukulan servis panjang sebanyak 0 kali, servis pendek 1 kali, lob 2 kali, netting 2 kali, dropshoot 1 kali, smash 1 kali, drive 0 kali, sehingga total pukulan sebanyak 7 kali. Berdasarkan hasil penelitian ini dapat disimpulkan bahwa Persentase kebutuhan pukulan dalam permainan bulutangkis pada nomor tunggal putra usia 17-19 tahun pada kejuaraan nasional di Surakarta tahun 2012 adalah sebagai berikut : (a) servis panjang : 1,08%, (b) servis pendek : 14,01%, (c) lob : 27,91%, (d) netting : 29,40%, (e) dropshoot : 8,59%, (f) smash : 11,78%, (g) drive : 7,23%. Kata kunci : Kebutuhan pukulan bulutangkis, tunggal putra, kejuaaraan nasiona

    Penyebab Rusaknya Cargo Oil Pump di MT. Anggraini Excellent Mustholiq a , Hermanto, A,W b , Putra A, A c

    No full text
    Intisari- Kelancaran proses bongkar muatan di atas kapal sangatlah penting karena jika terjadi keterlambatan proses bongkar muatan menyebabkan perusahaan rugi karena membayar biaya sandar lebih lama. Dan proses bongkar muatan di kapal MT. Anggraini Excellent menggunakan cargo oil pump dan pompa tersebut rusak ketika proses bongkar muatan MFO. Rumusan masalah penelitian ini adalah 1) Faktor apa saja yang menyebabkan rusaknya cargo oil pump ketika proses bongkar di MT. Anggraini Excellent, 2) Apa dampak dari tidak sesuainya viskositas muatan pada cargo oil pump ketika proses bongkar di MT. Anggraini Excellent, 3) Bagaimana upaya mengatasi muatan marine fuel oil ketika proses bongkar di MT. Anggraini Excellent. Peneliti menggunakan metode deskriptif kualitatif, triangulasi hasil observasi, wawancara dan studi pustaka. Digunakan teknik analisis data SHEL, peneliti mengidentifikasi faktor penyebab, dampak dan upaya yang dilakukan terkait penyebab rusaknya cargo oil pump. Hasil yang diperoleh dari penelitian ini menunjukkan bahwa penyebab rusaknya cargo oil pump pada proses bongkar MFO disebabkan oleh ketidaksesuaian viskositas muatan dengan jenis kapal, dengan adanya kerusakan tersebut berdampak pada proses bongkar muatan yang terhambat. Upaya yang dilakukan untuk mengatasi hal tersebut adalah melakukan penggantian cargo oil pump yang rusak dengan cargo oil pump yang lain

    Sound radiation from perforated plates

    No full text
    Perforated plates are quite often used as a means of engineering noise control to reduce the sound radiated by structures. However, there appears to be a lack of representative models to determine the sound radiation from a perforated plate. The aim of this thesis is to develop such a model that can be used to give quantitative guidance corresponding to the design and effectiveness of this noise control measure. Following an assessment of various models for the radiation efficiency of an unbaffled plate, Laulagnet’s model is implemented. Results are calculated and compared with those for baffled plates. From this, simple empirical formulae are developed and give a very good agreement with the analytical result. Laulagnet’s model is then modified to include the effect of perforation in terms of a continuously distributed surface impedance to represent the holes. This produces a model for the sound radiation from a perforated unbaffled plate. It is found that the radiation efficiency reduces as the perforation ratio increases or as the hole size reduces. An approximate formula for the effect of perforation is proposed which shows a good agreement with the analytical calculation up to half the critical frequency. This could be used for an engineering application to predict the noise reduction due to perforation. The calculation for guided-guided boundary conditions shows that the radiation efficiency of an unbaffled plate is not sensitive to the edge conditions. It is also shown that perforation changes the plate bending stiffness and mass and hence increases the plate vibration. The situation is also considered in which a perforated unbaffled plate is located close to a reflecting rigid surface. This is established by modifying the Green’s function in the perforated unbaffled model to include an imaginary source to represent the reflected sound. The result shows that the presence of the rigid surface reduces the radiation efficiency at low frequencies. The limitation of the assumption of a continuous acoustic impedance is investigated using a model of discrete sources. The perforated plate is discretised into elementary sources representing the plate and also the holes. It is found that the uniform surface impedance is only valid if the hole distance is less than an acoustic wavelength for a vibrating rectangular piston and less than half an acoustic wavelength for a rectangular plate in bending vibration. Otherwise, the array of holes is no longer effective to reduce the sound radiation. Experimental validation is conducted using a reciprocity technique. A good agreement is achieved between the measured results and the theoretical calculation for both the unbaffled perforated plate and the perforated plate near a rigid surface

    Superconductivity in Layerd Cuprate

    No full text
    A series of layered cuprate (Rut_xNb)Sr2GdCups (Ru1212) for 0 :5 x :5 1 has been synthesized by the solid state reaction method. Powder X-ray diffraction analysis indicates that oxygen flow is important in the formation of the Ru1212 phase and superconductivity in the system. Samples with nominal composition (Rul_ x b)Sr2GdCu20 S can be indexed as a tetragonal structure with space group P4/mmm. The undoped compound exhibits the highest superconducting transition with Tc onsel of 65 K and Tc zero of 55 K. Our results also show that doping with b decreases the normal state conductivity and suppresses superconductivity in the system

    Genotypic Differences in Dry Weight Accumulation, N Assimilation and Redistribution, and the Effects on Seed Yield and Protein Content in Faba Beans

    No full text
    This experiment was conducted to study the effects of genotypic differences in dry weight accumulation, N assimilation and redistribution, and N redistribution efficiency of different plant parts on seed yield and protein content among three faba bean cultivars, using a randomized complete block design. The total dry weight accumulated in different growth stages showed significant differences among cultivars during vegetative growth and early flowering, and during flowering and early seed filling, but not during seed filling. N was assimilated throughout growth but a large quantity was assimilated during seed filling ranging from 47.66 to 56.50% of the total plant N. The redistribution ofN from leaves, stems and pod walls to the seeds ranged from 26.66 - 31.42 %, 6.89 - 11.05% and 12.24 - 20.51 % of the seed N content, respectively. The remaining seed N content was assimilated during seed filling which accounted for 40.04 - 52.15 %. High Protein content in seeds seemed to be due to greater N assimilation during seed filling rather than to the N redistribution efficiency from the vegetative plant parts

    Tinjauan Yuridis Perlindungan Hukum Terhadap Pekerja Penyandang Disabilitas Ditinjau Dari Undang-Undang No. 13 Tahun 2003 Tentang Ketenagakerjaan

    No full text
    A. Nama : Dharu Baskara Deddy Satya Suprapto Waney Putra B. NIM : 1740050065 C. Judul Skripsi : Tinjauan Yuridis Perlindungan Hukum Terhadap Pekerja Penyandang Disabilitas Ditinjau dari Undang - Undang No. 13 Tahun 2003 tentang Ketenagakerjaan D. Kata Kunci : Pekerja Penyandang Disabilitas, Perlindungan Hukum, Diskriminasi, Kesempatan Kerja, Ketenagakerjaan. E. Program Kekhususan : Hukum Administrasi Negara F. Halaman : xii + 75 halaman G. Daftar Bacaan : Buku, Jurnal, Perundang-undangan dan internet H. Ringkasan Isi : Penyandang disabilitas masih mendapat perlakuan diskriminasi dalam hal mencari pekerjaan. Hal ini disebabkan oleh karena masih banyak yang beranggapan bahwa kondisi fisik yang tidak sempurna dapat mengurangi kualitas kerja, sedangkan kenyataannya pekerja penyandang disabilitas yang memiliki kemampuan dibidangnya memiliki potensi untuk bekerja di bidang formal dan bahkan dapat bersaing dengan pekerja non-disabilitas. Peraturan perundang-undangan telah mengatur mengenai kedudukan dan hak penyandang disabilitas untuk dapat bekerja, contohnya Undang-Undang Ketenagakerjaan dan Undang-Undang Penyandang Disabilitas sebagai bentuk perlindungan hukum bagi pekerja penyandang disabilitas. Metode penelitian yang akan digunakan adalah penelitian yuridis normatif dengan pendekatan perundang-undangan melalui analisis yang akan penulis lakukan terkait perlindugnan hukum terhadap pekerja penyandang disabilitas dari Undang-Undang No. 13 Tahun 2003 tentang Ketenagakerjaan dan Undang-Undang No. 8 Tahun 2013 tentang Penyandang Disabilitas. Penelitian ini juga didukung melalui pengkajian regulasi dan literatur yang berkaitan dengan isu hukum yang penulis teliti. Hasil yang penulis dapatkan dari penelitian ini antara lain bentuk perlindungan hukum dalam pemenuhan hak-hak pekerja penyandang disabilitas menurut UU No. 13 Tahun 2003. Dan kedudukan pekerja penyandang disabilitas dalam dunia kerja menurut UU No. 13 Tahun 2003. I. Dosen Pembimbing :1) Ibu I. Dewa Ayu W, S.H., M.H. 2) Ibu L. Elly AM Pandiangan, S.H., M.H./ A. Name :Dharu Baskara Deddy Satya Suprapto Waney Putra B. NIM : 1740050065 C. Thesis Title : Review of Legal Protection Against Workers with Disabilities Viewed from Law Number 13 Year 2003 concerning Manpower D. Keywords : Workers with Disabilities, Legal Protection, Discrimination, Job Opportunities, Employment. E. Specialization Program : Administrative Law F. Pages : xii + 75 pages G. Reading List : Books, Journals, Laws and Regulations and the Internet H. Content Summary: Persons with disabilities still receive discrimination in looking for work. This is because there are still many who think that imperfect physical conditions can reduce the quality of work, even though workers with disabilities who have the ability in their fields have the potential to work in the formal sector and can even compete with non-disabled people. workers. Legislation has regulated the position and rights of persons with disabilities to be able to work, for example the Manpower Law and the Law on Persons with Disabilities as a form of legal protection for workers with disabilities. The research method that will be used is normative juridical research with a statutory approach through analysis that the author will carry out regarding legal protection for workers with disabilities from Law Number 13 of 2003 concerning Manpower and Law Number 8 of 2013 concerning Persons with Disabilities. . This research is also supported through a review of regulations and literature related to legal issues that the author studied. The results obtained by the authors from this study include the form of legal protection in fulfilling the rights of workers with disabilities according to Law Number 13 of 2003. And the position of workers with disabilities in the world of work according to Law Number 13 of 2003. I. Advisor : 1) Mrs. I. Dewa Ayu W, S.H., M.H. 2) Mrs. L. Elly AM Pandiangan, S.H., M.H

    Quality characteristics and sensory profile of stirred yogurt enriched with papaya peel powder

    No full text
    Dietary fibre enriched food is gaining more popularity due to their numerous health benefits. In this study, papaya peel powder was prepared as a source of dietary fibre to be fortified in yogurt at different concentrations (1.5 and 3.0 % w/w). Papaya peel was dried at three different temperatures (45, 55 and 65°C) and the results showed that drying at temperature of 55 and 65°C was able to retain higher total dietary fibre content of 40.21 and 48.00 g/100 g, respectively, and was used for enrichment in yogurt. The quality characteristics in terms of viscosity, pH and colour (L*, a*, b*, chroma, hue angle and total colour difference) of stirred yogurt added with papaya peel powder stored at 4°C was investigated weekly up to 21 days. Sensory evaluation (9-point hedonic scale) was also conducted for the yogurt samples prepared. Results showed the viscosity of yogurt was higher when the amount of papaya peel powder added was increased. It also showed an increasing trend during 21 days of storage. The pH values of the samples prepared had no significant difference (P > 0.05) as the concentration of powder was raised. However, a notable reduction in pH was observed after storage. Colour parameters were also significantly affected (P < 0.05) by the addition of powder, with fortified samples exhibiting darker (lower L* value) and more yellowish (higher b* value) colour than the control sample. Nonetheless, the parameters remained unchanged during storage of 21 days. Sensory results revealed that the stirred yogurt with 1.5% concentration of papaya peel powder dried at 55°C received the highest sensory scores among other samples

    Morphometric analysis of Malaysian Oxudercine goby, Boleophthalmus boddarti (Pallas, 1770)

    No full text
    The Oxudercine gobies or mudskippers are locally known as belacak or "tembakul". These euryhaline fish are amongst the air breathing gobies found in Malaysia. Boleophthalmus boddarti is one of the common mudskippers inhabiting tidal flats, mangrove swamps, estuarines and coastal areas. Conventional and truss morphometrics as well as meristic data from 85 samples in five populations (Pulau Pinang, Kuala Selangor, Banting, Port Dickson and Melaka) of B. boddartiwere analyzed using one-way ANOVA and Principal Component Analysis (PCA). Fifteen morphometric, 28 truss morphometric and 9 meristic data were analyzed to examine the degree of similarity among the five populations. All morphometric characters within and between the populations were significantly different (P< 0.05). Using the conventional morphometric data analysed by PCA, the populations of B. boddarti are clustered into 3 groups, where Banting andMelaka populations form the first group, Pulau Pinang and Kuala Selangor populations the second group and Port Dickson population the third group. In contrast, 3 groups were also clustered based on the truss morphometric data but the grouping was different. The three groups from the truss morphometric data consist of Kuala Selangor and Banting populations in the first group, Melaka and Port Dickson populations the second group and the Pulau Pinang populationthe third group which is distantly separated from the other two groups. The results indicate that the shape of mudskippers in the northern part is distinct from the middle and southern parts of Peninsular Malaysia. Based on meristic data, all populations were centric and no grouping was identified. The length-weight relationship for B. boddarti in this study was described as log W=log 0.754 + 1.029 log TL

    Class-Based Weighted Window for TCP Fairness in WLANs

    No full text
    The explosive growth of the Internet has extended to the wireless domain. The number of Internet users and mobile devices with wireless Internet access is continuously increasing. However, the network resource is essentially limited, and fair service is a key issue in bandwidth allocation. In this research, the focus is on the issue of fairness among wireless stations having different number and direction of flows for different required bandwidth to ensure that fair channel is fairly shared between wireless stations in the same class of bandwidth. It is shown that the current WLANs allocate bandwidth unfairly. It is also identified that the cause of this problem of unfairness is the TCP cumulative ACK mechanism combined with the packet dropping mechanism of AP queue and the irregular space for each wireless station in AP queue. The proposed method allocate converged bandwidth by introducing a Class-Based Weighted Window method which adjusts the TCP window size based on the current conditions of the network and according to the network’s requirements. This method works in wireless stations without requiring any modification in MAC. It can guarantee fair service in terms of throughput among wireless users whether they require the same or different bandwidth.Wireless LAN, TCP, Fairness
    corecore