Design and Development of the Space Shuttle Tail Service Masts

The successful launch of a space shuttle vehicle depends on the proper operation of two tail service masts (TSMs). Reliable TSM operation is assured through a comprehensive design, development, and testing program. The results of the concept verification test (CVT) and the resulting impact on prototype TSM design are presented. The design criteria are outlined, and the proposed prototype TSM tests are described

Field excursion to enhance coastal and environmental engineering capacities of engineers in administrative positions

The capacity building of coastal administrators is essential for sustainable coastal zone management. In order to enhance the ability of trainees in coastal and environmental engineering, the College of Land, Infrastructure, Transport and Tourism of the Japanese Government has carried out annual field excursions to Kujukuri Beach, a typical sandy beach in central Japan for comprehensively learning about real phenomena occurring on the beach and in the hinterland. This paper describes the excursion in 2011, in which 20 trainees participated. The importance of learning through the field excursions to coasts is discussed

Effects of anthropogenic factors on development of sand spits and cuspate forelands with rythmic shapes

The development of sand spits and cuspate forellands with rhythmic shapes was numerically predicted using the BG model (a 3-D model for predicting beach changes based on Bagnold's concept) under the oblique wave incidence that the angle between the direction normal to the shoreline and the wave direction is +-60 degrees, given an infinitesimal perturbation as the initial condition. Then the effects of the anthropogenic factors such as the construction of a groin and an offshore breakwater on the development of sand spits and cuspate forelands were investigated using the same model. The construction of a groin had a considerable impact on the sandy beach: the alteration from the field with the development of the sand spits to that with the elongation of a single sand spit, as well as the acceleration of offshore sand transport because of the blockage of longshore sand transport. The construction of an offshore breakwater strengthened the wave-seltering effect as well as the blockage of longshore sand transport, resulting in dominant beach changes. The calculated results in case of an offshore breakwater reasonably explained the example of the formation of the sand bars with two lagoons inside observed in a shallow lagoon surrounded by the Black Sea and Azov Sea

Factors Responsible for the Stability and the Existence of a Clean Energy Gap of a Silicon Nanocluster

We present a critical theoretical study of electronic properties of silicon nanoclusters, in particular the roles played by symmetry, relaxation, and hydrogen passivation on the the stability, the gap states and the energy gap of the system using the order-N [O(N)] non-orthogonal tight-binding molecular dynamics and the local analysis of electronic structure.Comment: 26 pages including figure

Pengembangan Model Pembelajaran Kooperatif Handep Untuk Pembelajaran Matematika

Penelitian ini bertujuan untuk mengembangkan Model Pembelajaran Kooperatif berbasis mekanisme gotong royong Handep. Handep adalah bentuk gotong royong suku Dayak Kalimantan Tengah. Model pembelajaran diberi nama Model Pembelajaran Kooperatif (MPK) Handep. Pengembangan MPKHandep dilakukan dengan menyusun buku ajar tentang MPK Handep. Hasil pengembangan divalidasi melalui uji ahli Teknolog Pembelajaran dalam tiga tahapan, dan disimpulkan bahwa preskripsi komponen-komponen MPK Handep telah layak dijadikan sebagai model pembelajaran. Validasi kelompok kecil menunjukkan, MPK Handep telah memenuhi prinsip-prinsip pembelajaran efektif (95,59%), elemen-elemen pembelajaran kooperatif (98,68%), dan kaidah-kaidah Quantum Teaching(75%). Ketercapaian penguasaan kemampuan pemecahan masalah kajian himpunan sebagai dampak instruksional (92%) dan penguasaan keterampilan sosial (91,7%) sebagai dampak pengiring implementasi MPK Handep. The purpose of research developed cooperative learning model based on mechanism of mutual cooperation handep. Handep is the form of collaboration in Dayak Ngaju tribe (Central Kalimantan). The models of teaching and learning namely Handep Cooperative Learning. The model was developed by designing theoretical model of MPK Handep and then validation that model. Cooperative Learning Handep validated by expert in Instructional Technology in three phases and field research in small group of students. The result from the expert validation, that Cooperative Learing Handep prescriptions was sufficiently as a model of learning. The result from field research, that Cooperative Learning Handep were sufficiently for the principles of learning effective (95,59%), the elements of cooperative learning (98,68%), and principles of the Quantum Teaching (75%). Problem solving ability as instructional effect was achieved (92%) and social skill as nurturant effect (91,70%)