198,515 research outputs found
Panga ya Saidi, Kenya
No full textPanga ya Saidi is a large, open-roofed, solutional cave located in the Dzitsoni limestone hills that run parallel to the Kenyan coast, approximately halfway between Mombasa and Malindi (3.67° S, 39.74° E) (Fig. 1). The location of the site is of significance since Panga ya Saidi is a rare near-coastal Stone Age site, with most archaeological investigations centering on the Rift zone of eastern Africa. The steep drop-off of the continental shelf in this region ensures that the cave would never have been more than 20 km from the coast during the Late Pleistocene and Holocene occupation of the site.No Full Tex
Around the Grothendieck anabelian section conjecture
No full textThis is the author accepted manuscript. The final version is available from CUP via the DOI in this record We mostly survey recent results (including those of the author) on the Grothendieck anabelian section conjectur
Konsep Ekonomi Syariah Perspektif Zaim Saidi
No full textBerkembang pesatnya ilmu ekonomi syariah disertai menjamurnya lembaga perbankan dan non bank berbasis syariah tiga puluh tahun terakhir. Mencerminkan antusiasme dan keyakinan umat Islam terhadap hadirnya sistem ekonomi Islam sebagai solusi atas dominasi sistem ekonomi kapitalis selama ini. Di tengah pengembangan ekonomi syariah yang sedemikian semarak, terdapat satu kritik secara mendasar yang berasal dari umat Islam sendiri terhadap konsep dan implementasi ekonomi syariah yang berlaku secara umum di masyarakat. Suara kritis tersebut diwakili oleh seorang tokoh bernama Zaim Saidi. Sebagai upaya introspeksi bagi umat Islam, menjadi perlu mengevaluasi kembali pemahaman dan keyakinan terhadap konsep ekonomi syariah selama yang diwakili oleh perspektif M. Umer Chapra menggunakan perspektif Zaim Saidi. Tujuan penelitian ini, untuk mengetahui bagaimanakah konsep ekonomi syariah perspektif Zaim Saidi menurut tinjauan konsep ekonomi syariah perspektif M. Umer Chapra. Jenis penelitian ini adalah kualitatif studi pustaka, dengan pendekatan yang dipergunakan adalah dokumentasi. Beberapa hasil penelitian ini adalah: Pertama, dalam tataran konseptual tidak ada perbedaan antara konsep ekonomi syariah perspektif Zaim Saidi dan perspektif M. Umer Chapra; Kedua, ada beberapa aspek dalam perspektif M. Umer Chapra yang perlu dikoreksi, antara lain tentang otentisitas gerakan Islamisasi ekonomi kontemporer, hakekat riba tidak hanya sebatas bunga dan perilaku ekonomi yang curang, hakekat uang fiat adalah termasuk dalam kategori riba, terjadi ketidakkonsistenan praktek muamalah dalam perbankan syariah, dan itu membuatnya secara prinsip sama dengan perbankan konvensional; ketiga, koreksi terhadap perspektif Zaim Saidi antara lain, ketidaklayakan penggunaan prinsip Amal Madinah, tidak haramnya penggunaan uang fiat, dan bolehnya menggunakan jasa layanan perbankan syariah dan konvensional di masa kontemporer
Panga ya Saidi, Kenya
No full textPanga ya Saidi is a large, open-roofed, solutional cave located in the Dzitsoni limestone hills that run parallel to the Kenyan coast, approximately halfway between Mombasa and Malindi (3.67° S, 39.74° E) (Fig. 1). The location of the site is of significance since Panga ya Saidi is a rare near-coastal Stone Age site, with most archaeological investigations centering on the Rift zone of eastern Africa. The steep drop-off of the continental shelf in this region ensures that the cave would never have been more than 20 km from the coast during the Late Pleistocene and Holocene occupation of the site
PUANG MATOA BISSU SAIDI SEBAGAI PEMIMPIN KOMUNITAS BISSU SIGERI KABUPATEN PANGKEP.
No full textABSTRAK
Puang Matoa Bissu Saidi Sebagai Pemimpin Komunitas Bissu Sigeri Kabupaten Pangkep. Fakultas Seni dan Desain Universitas Negeri Makassar. Pembimbing I : Dr. Hj. Heriyati Yatim, M.Pd, Pembimbing II : Rahma M, S.Pd, M.Sn
Penelitian ini bertujuan untuk : (1). Mendeskripsikan latar belakang kehidupan Puang Matoa Bissu Saidi sehingga diangkat sebagai pemimpin komunitas Bissu Sigeri Kabupaten Pangkep, (2). Mendeskripsikan kepemimpinan Puang Matoa Bissu Saidi pada saat memimpin komunitas Bissu Sigeri Kabupaten Pangkep. Jenis penelitian ini adalah penelitian kualitatif yaitu penelitian yang dilakukan untuk memperoleh data-data berupa lisan maupun tulisan. Subjek penelitian adalah Puang Matoa Bissu Saidi. Para Bissu, dan masyarakat sekitarnya. Sumber data diperoleh dari sumber data primer yaitu sumber data yang diperoleh langsung dan sumber data sekunder yaitu diperoleh dari dokumentasi atau studi kepustakaan. Data dikumpulkan dengan teknik Observasi yaitu dengan pengamatan langsung ke lokasi penelitian, wawancara yaitu dengan melakukan komunikasi langsung dengan para narasumber, dan dokumentasi yang diambil melalui ponsel di lokasi penelitian. Analisis data dilakukan dengan cara pengelompokan data, display data dan penarikan kesimpulan. Dari pembahasan dan analisis data dapat ditarik kesimpulan : (1). Latar belakang kehidupan Puang Matoa Bissu Saidi memiliki perjalanan hidup yang cukup panjang dan menarik untuk diceritakan. Sejak kecil Bissu Saidi tinggal bersama ayahnya. Perjalanannya menjadi Bissu tidak mudah, Puang Matoa Bissu Saidi kerap kali dihadapkan dengan konflik yang masih sama, terkait kerasnya hidup terhadap kaum yang dianggap menyalahi kaidah agama yang telah melekat pada masyarakat umum. Adapun awal mula Saidi menjadi Bissu yaitu berawal dari mimpi, kemudian dilanjutkan dengan berpuasa, dan prosesi Ir ebba. (2). Kepemimpinan Puang Matoa Bissu Saidi sepanjang perjalanan Bissu di Segeri belum terkalahkan. Sebab cara dia memimpin sangat berbeda dengan Puang Matoa Bissu lainnya. Dia memiliki jiwa sosial yang sangat tinggi dan semangat yang luar biasa, terbukti dengan banyaknya prestasi yang beliau cetak selama kepemimpinannya. Salah satunya dengan membawakan naskah I Lagaligo kebeberapa Negara
Approaches of Setting SAIDI Target Value for Taiwan Power System
No full text[[abstract]]This paper presents a method for setting the annual target on customer’s electricity supply reliability for the regional transmission offices of Taiwan Power Company (Taipower). The reliability of customer’s electricity supply is measured by the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI) in Taipower. The analytic hierarchy process (AHP) has been adopted, by which all the influential factors on SAIDI and SAIFI can be presented into a hierarchical structure which describes how these factors affect the annual SAIDI (or SAIFI) level. The evaluation indices that measure the regional status of these influential factors are designed at the lowest layer of the hierarchical model. The relative weightings among the influential factors are derived from the linguistic comparison results obtained by the questionnaire survey conducted on the maintenance and operation engineers of Taipower’s 6 regional transmission offices. The evaluation index values of regional transmission offices are multiplied to the weighting of each influential factor from the lowest layer upwards until the objective values at the top of hierarchical structure are calculated. On basis of the relative comparison among these 6 objective values calculated, Taipower’s corporate SAIDI (or SAIFI) target is then distributed to be the 6 regional targets. To provide a further insight into the effectiveness and limitation of proposed method, the AHP results on Taipower’s corporate target distribution obtained from the calculation are compared with Taipower’s SAIDI records at 2003. The method after slight modification can be extended to other power engineering management target.[[fileno]]2030164030017[[department]]電機工程學
On natural frequencies of Levy-type thick porous-cellular plates surrounded by piezoelectric layers
No full textIn this paper, an analytical solution for free vibration of rectangular porous-cellular plates enclosed by piezoelectric layers is presented by using third-order shear deformation plate theory. Using Hamilton’s principle and Maxwell equation, the governing equations of the system are obtained for both closed and open circuit conditions. Due to the coordinate dependency of mechanical properties of porous materials, the governing equations of motion are highly coupled. By using four auxiliary functions, these equations convert into two independent partial differential equations. The decoupled equations are solved analytically by employing Levy-type boundary conditions for the plate. Finally, after validation of the obtained results, the effects of various parameters such as porosity and geometrical dimensions on the natural frequencies of plate are investigated for different electrical and mechanical boundary conditions. It is found that the natural frequencies of the plate decrease as the coefficient of plate porosity increases. Also, the piezoelectric layers cause the natural frequency of the plate to increase in various vibrating modes
The Middle to Later Stone Age transition at Panga ya Saidi, in the tropical coastal forest of eastern Africa
No full textThe Middle to Later Stone Age transition is a critical period of human behavioral change that has been variously argued to pertain to the emergence of modern cognition, substantial population growth, and major dispersals of Homo sapiens within and beyond Africa. However, there is little consensus about when the transition occurred, the geographic patterning of its emergence, or even how it is manifested in the stone tool technology that is used to define it. Here, we examine a long sequence of lithic technological change at the cave site of Panga ya Saidi, Kenya, that spans the Middle and Later Stone Age and includes human occupations in each of the last five Marine Isotope Stages. In addition to the stone artifact technology, Panga ya Saidi preserves osseous and shell artifacts, enabling broader considerations of the covariation between different spheres of material culture. Several environmental proxies contextualize the artifactual record of human behavior at Panga ya Saidi. We compare technological change between the Middle and Later Stone Age with on-site paleoenvironmental manifestations of wider climatic fluctuations in the Late Pleistocene. The principal distinguishing feature of Middle from Later Stone Age technology at Panga ya Saidi is the preference for fine-grained stone, coupled with the creation of small flakes (miniaturization). Our review of the Middle to Later Stone Age transition elsewhere in eastern Africa and across the continent suggests that this broader distinction between the two periods is in fact widespread. We suggest that the Later Stone Age represents new short use-life and multicomponent ways of using stone tools, in which edge sharpness was prioritized over durability.1. Introduction 1.1. Identifying the MSA-LSA technological transition in eastern Africa 1.2. Site and environment 2. Materials and methods 3. Results 3.1. Local stone sources 3.2. Lithic materials, frequency, and size 3.3. Core reduction 3.4. Flakes 3.5. Retouched flakes 4. Discussion 4.1. The Panga ya Saidi lithic sequence in context 4.2. Overview of the Panga ya Saidi sequence 4.3. The MSA-LSA lithic transition in eastern Africa and beyond 5. Conclusion
67,000 years of coastal engagement at Panga ya Saidi, eastern Africa
No full textThe antiquity and nature of coastal resource procurement is central to understanding human evolution and adaptations to complex environments. It has become increasingly apparent in global archaeological studies that the timing, characteristics, and trajectories of coastal resource use are highly variable. Within Africa, discussions of these issues have largely been based on the archaeological record from the south and northeast of the continent, with little evidence from eastern coastal areas leaving significant spatial and temporal gaps in our knowledge. Here, we present data from Panga ya Saidi, a limestone cave complex located 15 km from the modern Kenyan coast, which represents the first long-term sequence of coastal engagement from eastern Africa. Rather than attempting to distinguish between coastal resource use and coastal adaptations, we focus on coastal engagement as a means of characterising human relationships with marine environments and resources from this inland location. We use aquatic mollusc data spanning the past 67,000 years to document shifts in the acquisition, transportation, and discard of these materials, to better understand long-term trends in coastal engagement. Our results show pulses of coastal engagement beginning with low-intensity symbolism, and culminating in the consistent low-level transport of marine and freshwater food resources, emphasising a diverse relationship through time. Panga ya Saidi has the oldest stratified evidence of marine engagement in eastern Africa, and is the only site in Africa which documents coastal resources from the Late Pleistocene through the Holocene, highlighting the potential archaeological importance of peri-coastal sites to debates about marine resource relationships
An investigation over the effect of piezoelectricity and porosity distribution on natural frequencies of porous smart plates
No full textThe eigenvibration characteristics of a smart plate with piezoelectric layers and porous-cellular core are investigated in the present article. The core plate is assumed to be composed of materials that contain pores and the porosities may be distributed according to different mathematical rules. Variational principle is applied in order to derive the continuous system equations on the basis of Mindlin plate theory. A highly efficient analytical modeling for eigenfrequency analysis of the smart plate is presented under the assumption that both Skempton’s pore pressure coefficient and normal elongation through the thickness are negligible. Unlike numerical methods that require huge computational cost, this approach enables us to find the system’s response for rectangular plates with arbitrary dimensions. To examine the validity of the present framework, multiple comparison studies are made between the extracted results and those available in the literature. It is shown that the type of porosity distribution influences strongly on the way that frequency changes. Furthermore, it is found out that it is necessary to consider electrical effects for plates with open circuit condition unlike the other electrical condition
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