Transient evolution of basal drag during glacier slip

Glacier slip is usually described using steady-state sliding laws that relate drag, slip velocity and effective pressure, but where subglacial conditions vary rapidly transient effects may influence slip dynamics. Here we use results from a set of laboratory experiments to examine the transient response of glacier slip over a hard bed to velocity perturbations. The drag and cavity evolution from lab experiments are used to parameterize a rate-and-state drag model that is applied to observations of surface velocity and ice-bed separation from the Greenland ice sheet. The drag model successfully predicts observed lags between changes in ice-bed separation and sliding speed. These lags result from the time (or displacement) required for cavities to evolve from one steady-state condition to another. In comparing drag estimates resulting from applying rate-and-state and steady-state slip laws to transient data, we find the peaks in drag are out of phase. This suggests that in locations where subglacial conditions vary on timescales shorter than those needed for cavity adjustment transient slip processes control basal drag.

Program Bimbingan dan Konseling pada Pasangan Rawan Perceraian Menurut Pemikiran Wahbah Az-Zuhaili

<p class="15bIsiAbstractBInggris">This research aims to find out the guidance and counselling program of Shaykh Wahbah az-Zuhaili in dealing with the issue of domestic divorce. This research is a literary study of his works. This study resulted in several programs, including A husband must give advice, direction and coaching to his wife. He also has to deal with every problem. Other programs to overcome household problems are advice and guidance, bed separation, punches, and appointing judges to mediate the problems.</p><p class="16aJudulAbstrak"><strong>Abstrak</strong></p><p class="16bIsiAbstrak">Penelitian ini bertujuan untuk mengetahui program bimbingan dan konseling dari karya Syaikh Wahbah az-Zuhaili dalam menangani masalah perceraian rumah tangga. Penelitian ini merupakan studi literatur terhadap karya-karya beliau. Hasil penelitian ini menghasilkan beberapa kesimpulan di antaranya: pasangan suami dan istri yang memiliki masalah dalam keluarga harus berupaya memahami kaidah-kaidah membangun rumah tangga dalam nilai-nilai Islam, pasangan suami istri mesti memahami hak dan kewajiban masing-masing. Seorang suami mesti memberikan nasehat, arahan dan pembinaan kepada istrinya. Ia juga harus mengatasi setiap permasalahan. Adapun program lainnya untuk mengatasi masalah rumah tangga yaitu: nasehat dan bimbingan, pisah ranjang, pukulan, dan mengangkat hakim untuk menengahi permasalahan yang terjadi.</p>

CAD Modeling and Manufacturing of Cleaning Machine used for Waste Collection on Beach

As the difficulties faced in keeping the beaches clean manually, come up with device which not only gathers the waste (sticks, on degradable waste) but also separates, which is easy for waste removal. The waste is collected over conveyor blade along with the sand which falls of through the holes on the conveyor back to the sand bed; separation of waste takes place through Density difference. It consists of one hopper where the different waste gets collected which facilitates easy disposal of waste.

Recognition and Prevention of Bed Separation Water: Based on Trapezoid Platform Model

In recent years, bed separation water inrush, as a new type of water disaster, has posed serious threat to mining safety in China’s many coal mines. This study focused on periodic water inrush accidents in the No. 7335 working face owned by Xuzhuang Coal Mine, Jiangsu Province, China. Based on the theory of key strata, the formation positions of the separation layer in the overlying strata were first identified; next, the trapezoid platform model of the fracture of the overlying strata was introduced for illustrating the evolutional process of the bed separation space and accurately calculating the position and the geometrical morphology of the bed separation space. On that basis, the relation between the fracture of the overlying stratum and the inrush of bed separation water was revealed with the use of the plate theory. Moreover, the prevention and control measures of the bed separation water were formulated. Research show that the arrangement of the diversion drilling holes can successfully eliminate the threat of the bed separation water to the lower working face.