Moving Stationary State of Exciton-Phonon Condensate in Cu2O

We explore a simple theoretical model to describe the properties of Bose condensed para-excitons in Cu2O. Taking into account the exciton-phonon interaction and introducing a coherent phonon part of the moving condensate, we derive the dynamic equations for the exciton-phonon condensate. Within the Bose approximation for excitons, we discuss the conditions for the moving inhomogeneous condensate to appear in the crystal. We calculate the condensate wave function and energy and a collective excitation spectrum in the semiclassical approximation. The stability conditions of the moving condensate are analyzed by use of Landau arguments, and two critical velocities appear in the theory. Finally, we apply our model to describe the recently observed interference between two coherent exciton-phonon packets in Cu2O.Comment: 20 pages (LaTeX), one figure (.ps) incorporated by epsf. Submitted to Phys. Stat. Sol (B

Arti Penting Asas Keterbukaan Dalam Penyelenggaraan Pemerintahan Yang Bebas Dari KorupsI, Koiusi, Dan Nepotisme (KKN)

In a democratic state, transparent operation of state power and governance is reguiredin order for law to function effectively and for democracy to serve as the mechanism of governance and statepower. Transparancy is a key strategic instrumentin the implemen station of democratic and sound governance. Because of the strategic importance of transparency, it should become a principle within state governance. Forthis reason, the actions of the government should be able to be evaluated in the administrative court

Mathematical control of complex systems 2013

Mathematical control of complex systems have already become an ideal research area for control engineers, mathematicians, computer scientists, and biologists to understand, manage, analyze, and interpret functional information/dynamical behaviours from real-world complex dynamical systems, such as communication systems, process control, environmental systems, intelligent manufacturing systems, transportation systems, and structural systems. This special issue aims to bring together the latest/innovative knowledge and advances in mathematics for handling complex systems. Topics include, but are not limited to the following: control systems theory (behavioural systems, networked control systems, delay systems, distributed systems, infinite-dimensional systems, and positive systems); networked control (channel capacity constraints, control over communication networks, distributed filtering and control, information theory and control, and sensor networks); and stochastic systems (nonlinear filtering, nonparametric methods, particle filtering, partial identification, stochastic control, stochastic realization, system identification)

Pengaruh Doping Terhadap Atlet PON XIV & SEA Games XIX Di Jakarta

Doping is a method to achieve athlete`s peak performance in sports competition and doping controvenes the ethics of both sport and medical science. The descriptive and retrospective studies have been done by using medical record for collecting data at Koni Pusat, Jakarta. The results showed that the doping has been used by 9 athletes during PON XIV/1996 and Sea Games XIX/1997 in Jakarta. They used CNS stimulant group of drug, i.e Ephedrine, Phenfluramine, Salbutamol, and Oxprenolol were used for Shooting; Phencamfamine was used for Cycling; Phenylpropanolamine was used for Hocky and Body Building; Heptaminol was used for Tenis and Salbutamol was used for Athletic and Shooting. As pointed out above, during PON XIV/1996 and Sea Games XIX/1997 in Jakarta, doping was still used by the athletes, while the doping was forbidden by The International Olimpyc Committe

Educational drama in the teaching of education for sustainability

In this paper, I describe part of my research project that examines the use of Educational Drama in Education for Sustainability in the upper stages of the primary school (10- and 11-year-olds). Central to the research is a small-scale qualitative research study. Here, I describe the educational focus of the study and outline the methodology. Central to the study was a series of drama lessons (taught by me) based on environmental themes. The lessons link with some of the key aims in Education for Sustainability - to help young people to develop awareness, knowledge and concepts, to encourage positive attitudes and personal lifestyle decisions and to help them to acquire action skills in and for the environment. The locus is within the Scottish education system. A number of key data were generated during the teaching and evaluation of the lessons. These take the form of field notes, children's evaluations of their work and learning, observation schedules, taped interviews with participants and observers and videotapes of the lessons. The analysis of the data is ongoing, but already there is substantial evidence to suggest that the drama was instrumental in helping the children to achieve the learning outcomes set for the lessons. Some of that evidence is presented here. I suggest that the active, participative learning central to drama is particularly useful for allowing children to develop skills in communication, collaboration and expressing ideas and opinions. Also, the immersion in the imagined context and narrative, integral to the 'stories' in the drama, allows the children to feel sympathy for and empathy with people who are affected by environmental issues and problems. In giving the children a context for research and in helping them to plan solutions and to suggest alternatives, the drama allows the participants opportunities to rehearse active citizenship and facilitates learning in Education for Sustainability

Improvement of COD and TOC reactive dyes in textile wastewater by coagulation chemical material

This study was designed to investigate the removal of reactive dyes, Samofix Red V-RBL and Samofix Green V-G from wastewater using a two step Al (III) coagulation/activated carbon adsorption method.The effects of pH and coagulant dosage as well as the effects of contact time and a powdered activated carbon dosage on dye removal were studied. The process was optimized with reasonable consumption of coagulant and quantity of obtained sludge. Coagulation as a main treatment process followed by adsorption achieved almost total elimination of both dyes from wastewater with significant reduction (90%) of chemical oxygen demand (COD), total organic carbon (TOC) and absorbable organic halide (AOX). Besides high efficiency of dye removal, the combined treatment process offers many advantages for potential application such as coagulant savings, minimal amount of sludge formationand also an economic feasibility since it does not require high costs for chemicals and equipments

Deformation and thinning field prediction for HFQ® formed panel components using convolutional neural networks

The novel Hot Forming and cold die Quenching (HFQ®) process can provide cost-effective and complex deep drawn solutions through high strength aluminium alloys. However, the unfamiliarity of the new process prevents its widescale adoption in industrial settings, while accurate Finite Element (FE) simulations using the most advanced material models take place late in design processes and require forming process expertise. Machine learning technologies have recently been proven successful in learning complex system behaviour from representative examples and have the potential to be used as design support tools for new forming technologies such as HFQ®. This study, for the first time, presents a novel application of a Convolutional Neural Network (CNN) based surrogate to predict the deformation and thinning fields for variable deep drawn geometries formed using HFQ® technology. A dataset based on deep drawn geometries and corresponding FE results is generated and used to train the model. The results show that near indistinguishable full field predictions in real time are obtained from the surrogate when compared with HFQ® simulations. This technique can be adopted in industrial settings to aid in both concept and detailed component design for complex-shaped panel components formed under HFQ® conditions, without underlying knowledge of the forming process