Describing collaborative forms: a profile of the team-writingprocess

The paper examines collaborative writing practices students in the Air Force Institute of Technology's Graduate School of Logistics and Acquisition Management use to produce team-authored theses. In analyzing how student writing teams plan, execute, and assess writing activities, the researchers identify and describe some of the forms that collaboration takes, thereby successfully connecting their work within a broader research continuum concerning collaborative writing, particularly when applied in academic settings     

d-Wave superconductivity in thet-J model using a systematically improved Variational Monte Carlo method

We can construct unbiased systematic improvements of standard Variational Monte Carlo calculations by the use of wavefunctions modified by short range operators. Using the energy and spectral width of the original and improved wavefunctions we can judge the quality of the trial wavefunctions. For the t-J model we find the regions of phase separation and d-wave superconductivity with varying J/t and hole density S and extend the T=0 phase diagram into the physically interesting region of 0.1 – 0.2and J/t 0.4.Above the critical ratio of J/t¦ _c we find clear evidence of d_x2-y2-pairing and above a higher value J/t¦_s phase separation. At =0.16we obtain values J/t¦ _c=0.4and J/t¦ _s=0.7. Cluster sizes up to 50 sites are used.     

Factors facilitating or impeding older adults’ creative contributions in the collaborative design of a novel DTV-based application

This article describes some of the challenges of supporting older adults’ creative input to the design of an (as yet) undefined digital television application. Focusing on commonly used brainstorming and paper prototyping techniques, constructive insights are gathered from users with limited experience of interactive technology. Encouraging older participants to move beyond what they are familiar with, the research reports on how fragmented conceptual knowledge of familiar technologies can either facilitate or impede the creative development of new ideas. This includes bias or contradictory ideas that can emerge in the elicitation process. As reported, other factors, such as the self-perception of inadequate drawing skills, demonstrate further barriers for some older adults to articulate their visions and aspirations for suitably designed technology.     

都市校园方庭

创建于1919年的The New School是一座都市中的大学,现有的8个学院分布在纽约曼哈顿各处,与城市血脉相连、融为一体。2008年建成的Sheila C.Johnson设计中     

Interference canceller for a single-wavelength bidirectional optical-fibre link

A simple and practical electronic technique is presented that provides interchannel-crosstalk isolation to better than a 10?9 BER for a 20 Mbit/s single-wavelength single-fibre full-duplex transmission system.     

Shallow water acoustic networks

Underwater acoustic networks are generally formed by acoustically connected ocean bottom sensor nodes, autonomous underwater vehicles (AUVs), and surface stations that serve as gateways and provide radio communication links to on-shore stations. The quality of service of such networks is limited by the low bandwidth of acoustic transmission channels, high latency resulting from the slow propagation of sound, and elevated noise levels in some environments. The long-term goal in the design of underwater acoustic networks is to provide for a self-configuring network of distributed nodes with network links that automatically adapt to the environment through selection of the optimum system parameters. This article considers several aspects in the design of shallow water acoustic networks that maximize throughput and reliability while minimizing power consumption