231 research outputs found
Qalqalah. The Subject of Language
No full text1 h 8 min«Qalqalah: The Subject of Language» is a fictional departure from «Delusions of Reference: From Language to Art», which grapples with the question ‘what is an institution?’ Through the fictional character Qalqalah, Sarah Rifky, follows a tangent to speak to art institutions and their futures through curatorial thinking and practice. Prior to asking about the future of art institutions, we must pose two questions: what is the future of art? And more importantly, what is the future of language?
The talk will be followed by a Q&A with the audience, expanding on Rifky’s practice on how to think about institution building curatorially, how her relationship to institutions has changed in relation to the failure of insurrection and her work with Beirut 2012-2105 as well as her tribulations with the historiography of art in the Arab world.
Sarah Rifky is a writer and curator based in Cairo, where she co-founded Beirut in 2012, an art space that thinks about institution building as a curatorial act. She is founder of CIRCA (Cairo International Resource Center for Art). She was a Curatorial Agent of dOCUMENTA 13 in Kassel, Germany. In 2010 she was Adjunct Professor of Art History and Theory at the American University in Cairo. Rifky is author of «The Going Insurrection» (2011) and «Delusions of Reference: In Defense of Art» (forthcoming). She is co-editor of the artist book «Damascus: Tourists, Artists and Secret Agents» (2009)
PERBANDINGAN PRODUK RODA GIGI UKM DAN RODA GIGI ORIGINAL EQUIPMENT MANUFACTURER (OEM) UNTUK PRODUK RODA GIGI TRANSMISI SEPEDA MOTOR
No full textRoda gigi merupakan salah satu komponen mesin yang kompleks dalam proses perancangan dan pembuatannya. Hingga saat ini, Usaha Kecil dan Menengah (UKM) produsen komponen otomotif di Jawa Tengah belum mempu memproduksi roda gigi untuk sistem transmisi sepeda motor yang mampu memenuh standar perusahaan otomotif nasional atau mampu menjadi komponen after sales di pasar komponen purna jual. Berdasarkan survey yang dilakukan di pasar purna jual di Semarang terhadap produk roda gigi transmisi sepeda motor, roda gigi transmisi yang dijual merupakan produk Original Equipment Manufacturer (OEM) atau produk impor dari China dan Taiwan. Berdasarkan survey di UKM, roda gigi yang diproduksi UKM lebih mengarah pada pesanan yang spesifik (customized) dan belum menjadi produk massal. Penelitian ini mencoba mendorong UKM untuk memproduksi roda gigi yang dapat diproduksi massal dan memberikan pesasanan secara kontinyu. UKM produsen roda gigi di Kecamatan Juwana, Kab. Pati, diberikan order pembuatan roda gigi untuk sistem transmisi sepeda motor. Produk roda gigi yang dihasilkan UKM ini kemudian dianalisa dan dibandingkan dengan produk roda gigi OEM. Hasil yang dibandingkan adalah uji komposisi, struktur mikro, nilai kekerasan dan kekasaran permukaan. Analisa perbandingan menunjukkan bahwa proses manufaktur roda gigi produk UKM hingga saat ini lebih menonjolkan aspek kemiripan bentuk dan geometri dengan roda gigi produk original equipment manufacturer (OEM) tetapi belum diikuti dengan kajian mengenai teknologi pengerasan permukaan, teknik pengaturan kekasaran permukaan dan pengujian running-in roda gigi. Kelemahan ini menjadikan produk roda gigi UKM masih belum dapat bersaing di pasar domestik</jats:p
Running-in of Rolling-Sliding Contacts
Get PDFRunning-in of two fresh and unworn surfaces in contact is a transient phase where friction and wear vary considerably in time. During running-in the surface properties of the components are adjusted. If the initial surface roughness of the rubbing surfaces is correctly chosen, the running-in changes into the steady-state phase. At this stage, the rubbing surfaces are in general smoother and their wear rate is low and constant. On the other hand, an inappropriate choice of roughness may lead to a rapid deterioration of the rubbing surfaces. The micro-geometry of the surface is an important factor in determining the life of mechanical components. During the running-in phase, the highest asperities are “flattened”, thereby increasing the number of asperities in contact and, as a result, increasing the load-carrying capacity of the surface. Fundamental studies that attempt to consider the details of running-in phenomena are relatively rare. This research is conducted with the aim of exploring the running-in phase for the rolling, sliding and rolling-sliding contact. Finite element simulations are conducted to calculate the stress distributions for the three types of contact motions during the running-in phase. The evolution of the contact pressure for a certain rolling or sliding distance is studied to unravel the running-in phase. During running-in of rolling contacts, the change in the surface topography results in the transformation from a rough surface to a smoother surface: the flattening of the high asperities induces a reduction in surface roughness. This flattening of asperities is due to plastic deformation and causes a higher equivalent residual stress at the surface. The transition of the running-in phase to the steady-state phase of a rolling contact is governed by the transition of plastic to elastic deformation on roughness level. In sliding contacts, the proposed finite element (FE) model combined with the Archard wear equation successfully predicts the contact pressure evolution and change in the topography on a macroscopic point of view. The change in the topography in a sliding contact is mainly caused by wear. A new FE model, with respect to the artificial and real surface roughness, is discussed. It is found that the proposed model is a useful tool to study the running-in of a surface on roughness level. The changes on macroscopic and on microscopic level of the surface are also discussed in the running-in of rolling-sliding contacts considering two aspects: wear and plastic deformation. The geometrical change of the contacting surface due to wear is predicted using the present FEM model, combined with the Archard wear equation, and has been compared with results from the literature. Calculations are performed to predict the wear of an artificial rough hemisphere in rolling-sliding contact with a smooth cylinder. The model also predicts the change of real rough surfaces which were in good agreement with the experimental results. The change of a rough surface, represented by an arithmetic average surface roughness, Ra, is predicted for lubricated rolling-sliding contacts using the load-sharing concept. The results obtained are in good agreement with experimental results. A FEM based model has been developed to study the running-in of rolling, sliding and rolling-sliding contacts on macroscopic level as well as on roughness level. However, the transition between the running-in phase and the steady-state phase for sliding and rolling-sliding contacts cannot be determined by considering only one single parameter; likewise for the rolling contact situation. Wear is an ongoing process
Investigation on Centrifugal Pump Shaft: A Comparison Study of the SME and the Imported Product
Get PDFThe implementation of the ASEAN-China Free Trade Agreement (ACFTA) forces the small and medium enterprises to have a high competition between the manufacturer from China and the ASEAN member countries. One of the competitions occurs on the market of centrifugal pump for fisherman ship. The SME product, made in Tegal, has a lower price but also has a short lifespan. The imported product is now preferred by the fisherman due to its better performance and its longer lifespan. The main problem of the SME pump comes from the excessive wear at the pump shaft, indicated by a collection of deep scratch at two locations in pump shaft. This paper investigates the cause of the excessive wear at the SME pump shaft and compares the quality of the SME and imported shaft by conducting material characterization, mechanical testing, and design evaluations. The chemical composition, hardness property, tensile strength, geometrical analysis and bearing design of the both shaft products are compared. Results show that the SME product uses a higher quality material shaft but ignores the good engineering design in developing the fisherman pump shaft product. The absence of the bearing mounting design on the shaft, the lack of lubricant volume and the low quality of the seals on the SME pump product induce the undesirable wear on the pump shaft. The improvement of the shaft design is required to increase the quality of the SME pump
Dualism Criminalization Of Homosexual Action
Get PDFThis study discusses the Criminalization of Homosexual acts. This research uses normative legal research. It is legal research that places law as a building system' of norma. The system' of Norm build include principals, norms, rules of law, court decision, agreements, doctrins (teachings). The author finda the conclution on this study that the legal vacuum regarding the regulation of same-sex sexual relations is something that we must pay attention to because the absence of law Governing this matter is a matter that is very urgent for the government to review and must make arrangements as soon as possible. Detailed and clear so that it is precise and easy to implement by law enforcement officials
Deskripsi Kualitatif Masalah Perawat dalam Melakukan Auskultasi di Ruang Perawatan Intensive Care Unit: Deskripsi Kualitatif Masalah Perawat Dalam Melakukan Auskultasi Di Ruang Perawatan Intensive Care Unit
No full textThis study aims to analyze the problems of nurses in conducting auscultation in the intensive care unit. The research method used is descriptive qualitative research. The results of the study found three main themes found in this study, including 1) the time used for auscultation was minimal due to the large number of nurses\u27 tasks to be completed, 2) the stethoscope used should have a clear sound when used, 3) the stethoscope should be more flexible in shape so that it is accessible to in use. In conclusion, the problem nurses face in conducting auscultation examinations on critical patients is the need for a stethoscope that has a more precise sound output and is flexible in its use.
Keywords: Auscultation, Intensive Care Unit, Stethoscop
SIMULASI BALISTIK PLAT BAJA UNTUK KENDARAAN MILITER PENDOBRAK DENGAN PELURU MU4-TJ MENGGUNAKAN METODE ELEMEN HINGGA
No full textIndonesia telah berhasil memproduksi kendaraan tempur yang diakui oleh dunia internasional. Kendaraan yang diberi nama Anoa dan Komodo ini dikategorikan sebagai Battering Ram atau Kendaraan Pendobrak. Jenis ini digunakan untuk pertempuran khusus dan aktivitas anti teror. Kendaraan pendobrak ini mampu menabrak beton setebal 30 cm dan dikendarai saat gelap karena menggunakan sistem kamera night vision. Kendaraan ini juga dilengkapi dengan peralatan elektronik dan komunikasi canggih mendukung operasi khusus. Penelitian ini fokus pada kendaraan Komodo dengan plat baja penyusun setebal 4 mm. Pelat baja ini telah mengalami uji tembak eksperimental untuk mengetahui karakteristik balistik dari material. Hasilnya didapatkan bahwa pada pengujian balistik plat baja tersebut diketahui bahwa ketebalan 8 mm dari plat baja ini tidak sampai tertembus peluru tajam pada sudut tembak 90°. Hanya satu jenis peluru yang digunakan dalam uji eksperimen plat tersebut. Diperlukan kajian tambahan yaitu analisa balistik pada plat baja penyusun kendaraan Komodo Pendobrak menggunakan metode elemen hingga dengan jenis peluru yang lain. Kajian dilakukan dengan software ABAQUS pada sudut tembak paling kritis 90o dan peluru baru yaitu MU4-TJ. Hasil analisa tersebut adalah peluru dapat menembus plat baja 4 mm 10 m dengan peluru MU4-TJ. Penggunaan plat baja 4 mm tidak disarankan untuk plat Komodo, namun bila tetap dikehendaki untuk digunakan sebaiknya dilakukan penambahan perlakuan material yaitu surface hardening.</jats:p
- …
