105,434 research outputs found
Un nouveau type de burin à Ksar Akil (Liban)
No full textNewcomer M.H. Un nouveau type de burin à Ksar Akil (Liban). In: Bulletin de la Société préhistorique française. Comptes rendus des séances mensuelles, tome 68, n°9, 1971. pp. 267-272
The Fracture Properties of Environmental-Friendly Fiber Metal Laminates
No full textThe tensile and impact properties of environmental-friendly composites and FMLs have been investigated. Of the four composites investigated here, a SRPP composite offered superior properties to basalt-, flax-, and hemp fiber-reinforced PP composites. Adding aluminum layers to the outer surfaces of the composites resulted in a significant enhancement in the tensile and impact properties of the laminates. The tensile strength and modulus properties of the FMLs obey a rule of mixtures approach, suggesting that simple procedures can be used to design these hybrid systems. Under low-velocity impact loading, the SRPP, and its associated FML, offered the highest resistance to perforation, as a result of gross plastic deformation in the composite and metal plies. A semi-empirical model, previously employed to characterize metal plates, was used to characterize the low-velocity impact response of the laminates investigated here. The model was capable of predicting the trends in the experimental data with reasonable success. This evidence suggests that environmental-friendly fiber-based FMLs offer significant potential for use in engineering applications
Identification for control: Deterministic algorithms and error bounds
No full textThis thesis was submitted for the degree of Doctor of Philosophy and awarded by the University of Cambridge.This dissertation deals with frequency domain identification of linear dynamic systems in a deterministic set-up. Various untuned algorithms are suggested, including one which is robustly convergent and asymptotically optimal (in n-width sense) for a finite model order. The suggested algorithms can easily be implemented in commercially available software for convex optimization
Flexural behaviour of pultruded jute/glass and kenaf/glass hybrid composites monitored using acoustic emission
No full textThe flexural (before and after cyclic loading up to 50% of ultimate load) and indentation behaviour of pultruded jute/glass and kenaf/glass hybrid polyester composites has been monitored using acoustic emission, and compared with that of kenaf fiber composites. In all hybrids, natural fiber content was 40 wt.%, while glass fiber one was 25 wt.%. Acoustic emission (AE) has been used for real-time monitoring during flexural and indentation loading: the analysis concentrated on AE resuming during reloading (Felicity ratio) and AE activity at low loads during unloading (crack closure effect). The results show that the introduction of this large amount of reinforcement appears quite effective on jute fiber reinforced laminates, although with a significant effect of fiber architecture, whilst it did not yield comparable results in kenaf fiber laminates. This was attributed to the insufficient fiber impregnation and to the need for improving the control of fiber orientation in the laminate. (C) 2010 Elsevier B.V. All rights reserved
STRATEGI MARKETING PENDIDIKAN MELALUI MEDIA SOSIAL DI SEKOLAH
No full textPenelitian ini bertujuan untuk menggali informasi agar dapat dijadikan referensi dalam melaksanakan strategi marketing pendidikan melalui media sosial di sekolah. Sekolah merupakan suatu organisasi yang bertujuan untuk melakukan penyidikan tentang keilmuan atau melakukan suatu usaha dalam bidang pendidikan. Sekolah yang mempunya strategi marketing pendidikan yang baik, maka akan sangat diminati masyarakat. Untuk mencapai tujuan tersebut, diperlukan strategi yang tepat dalam memasarkan sebuah sekolah agar sekolah dapat berkembang pesat dan banyak memiliki peminat. Melakukan promosi sekolah melalui media sosial merupakan salah satu strategi dalam marketing pendidikan. Media sosial dianggap lebih efektif dibandingkan dengan media konservatif seperti brosur, pamflet, dan spanduk. Strategi marketing yang biasa digunakan lembaga pendidikan adalah bauran pemasaran (marketing mix) antara lain : (1) Product, (2) Price, (3) Place, (4) Promotion, (5) People, (6) Physical Evidence, dan (7) Process. Dalam penelitan ini digunakan metode penelitian pustaka (library research) yaitu seluruh informasi dan data terkait penelitian diperoleh dari perpustakaan dan referensi yang lainnya.
PENGELOLAAN TATA RUANG KANTOR DI SEKOLAH MENEGAH PERTAMA
No full textKantor merupakan bagian dari organisasi yang menjadi sentral bagi berlangsungnya suatu kegiatan administrasi. Setiap organisasi pasti membutuhkan adanya kantor sebagai tempat di mana pimpinan dan pegawai berkumpul untuk melaksanakan tugas-tugas tertentu. Kegiatan-kegiatan tersebut tentunya membutuhkan kondisi ruangan yang nyaman, bersih dan rapi guna memberikan kesan yang efektif dan efisien kepada setiap pegawai di dalam ruangan dalam melaksanakan kegiatan yang terorganisir. Hal ini dikarenakan jika ruangan dalam kondisi baik, nyaman dan bersih maka akan menimbulkan semangat kerja pegawai dan meningkatkan kinerja pegawai. Dalam penelitian ini menggunakan metode penelitian kualitatif, sumber data yang digunakan dalam penelitian ini adalah dengan cara observasi yang dilakukan di sekolah menengah pertama, wawancara partisipan, dan studi pustaka. Penelitian ini bertujuan untuk memberikan gambaran tentang bagaimana pengelolaan atau penataan ruang kantor yang baik yang dapat memberikan kenyaman bagi orang-orang yang menempatinya. Dan hasil dari penelitian yang dilakukan di sekolah menengah pertama ini, dapat disimpulkan bahwa sebagian pengelolaan tata ruang nya sudah sesuai dengan teori. Salah satu diantaranya dalam hal lingkungan fisik seperti pencahayaan, udara, suara, warna, dan kebersihan nya pun di nilai sudah sangat baik. Berbeda dalam hal administrasi dan ketrsediaan alat-alat kantor nya, belum sesuai dengan teori yang ada
Environmental effects on the mechanical behaviour of pultruded jute/glass fibre-reinforced polyester hybrid composites
No full textThe environmental degradation of the mechanical properties of pultruded jute and jute/glass hybrid reinforced polyester composites with high fibre volume fraction (0.70) has been investigated with special focus on the effects of water ageing and moderate temperature (up to 80 C). Water absorption tests were conducted by immersing specimens in distilled water at room temperature until saturation (4076 h). Water absorption curves and characteristic parameters such as coefficient of diffusion and equilibrium moisture content were determined. The composites exhibited a deviation from the Fickian behaviour with a positive role played by the addition of glass fibres in terms of moisture resistance. The influence of water uptake on tensile and flexural properties of composites was evaluated and a significant reduction in both strength and modulus was observed, with a superior strength retention offered by hybrid composites. Acoustic emission (AE) and scanning electron microscopy enabled to identify the weakening of fibre! matrix interface induced by water ageing. The effects of temperature were mitigated by glass fibres if compared with the higher degradation experienced by jute fibres. (C) 2014 Elsevier Ltd. All rights reserved
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
PERENCANAAN KEUANGAN SEKOLAH DAN UPAYA PERBAIKAN SISTEM MANAJEMEN KEUANGAN DI RA-ABATA MARDHOTILLAH
No full textModal utama berlangsungnya manajemen sekolah yang sehat salah satunya berupa proses perencanaan keuangan. Dengan memanfaatkan sumber daya yang ada yang dapat dikembangkan menjadi pemasukan yang memiliki nilai keuangan yang baik. Tentunya sekolahan harus mampu menjadi tempat perencanaan keuangan yang baik. Tujuan perencanaan keuangan yang baik yaitu untuk mencapai tujuan dan memuaskan semua pihak. Tujuan dan observasi ini adalah untuk menggambarkan perencanaan keuangan di sekolah "RA ABATA MARDHOTILLAH",Teluk Jambe,Kab. Karawang’’. Metode penelitian menggunakan pendekatan kualitatif. Subyek penelitian ini yaitu wakil kepala sekolah dan pengurus bagian tata usaha. Data penelitian didapatkan melalui wawancara dan observasi. Hasil penelitian menunjukkan bahwa sekolah RA ABATA MARDHOTILLAH, Teluk Jambe, Kab. Karawang perencanaan keuangan RA ABATA dalam perencanaan anggaran yang dilakukan sudah mengikuti panduan dan ketentuan yang berlaku yang sesuai prosedur pemerintah dalam menyusun RAPBS. Namun, perlu adanya perbaikan dan peningkatan dengan tujuan meningkatkan keuangan sekolah, selain itu diperlukan adanya kerjasama dengan pihak lain
- …
