Flat-plate heat pipe

Flat plate (vapor chamber) heat pipes were made by enclosing metal wicking between two capillary grooved flat panels. These heat pipes provide a unique configuration and have good capacity and conductance capabilities in zero gravity. When these flat plate vapor chamber heat pipes are heated or cooled, the surfaces are essentially isothermal, varying only 3 to 5 C over the panel surface

Steady state and transient performance of hot reservoir gas controlled heat pipes

Inert gases for passive control of heat pipes in hot reservoir system

User's manual for the TRW gaspipe program. A vapor-gas front analysis program for heat pipes containing noncondensible gas

Digital computer program manual for design, analysis, and performance prediction of heat pipes with noncondensible gases including input/output routines and Runge-Kutta model

User's manual for the TRW gaspipe 2 program: A vapor-gas front analysis program for heat pipes containing non-condensible gas

A digital computer program for design and analysis of heat pipes which contain non-condensible gases, either for temperature control or to aid in start-up from the frozen state, is presented. Some of the calculations which are possible with the program are: (1) wall temperature profile along a gas-loaded heat pipe, (2) amount of gas loading necessary to obtain desired evaporator temperature at a desired heat load, (3) heat load versus evaporator temperature for a fixed amount of gas in the pipe, and (4) heat and mass transfer along the pipe, including the vapor-gas front region

Development of a fidelity structural model based on a shake table test for an innovative seismic resisting system

The research project is to produce a fidelity three-dimensional (3D) structural model based on a shake table test, which is used to demonstrate performances of an innovative seismic resisting system for reducing damages to building structures under earthquakes

Development of a fidelity structural model based on a shake table test for an innovative seismic resisting system

The research project is to produce a fidelity three-dimensional (3D) structural model based on a shake table test, which is used to demonstrate performances of an innovative seismic resisting system for reducing damages to building structures under earthquakes

Loss of Rail Competition as an Issue in the Proposed Sale of Conrail to Norfolk Southern: Valid Concern or Political Bogeyman

The Department of Transportation\u27s plan to return Consolidated Rail Corporation (Conrail) to the private sector by selling the federal government\u27s controlling interest to Norfolk Southern Corporation has, not surprisingly, been the subject of a spirited debate in the transportation and political community since its announcement in February, 1985. Critics have said that the sale proposal runs directly contrary to [antitrust] policy goals and would have a serious, adverse effect on competition. The proposal is a flagrant violation of antitrust laws and would create an unconscionable monopoly. The purpose of this article is to examine the legal standards historically and currently applied to considering the competitive impacts of rail consolidations in conjunction with the goals of the legislation relating to Conrail. With that perspective, a viewpoint will be offered as to whether the competitive effects of the proposed sale have been addressed in a manner consistent with those standards and goals

British entrepreneurs and industrial revolution cost management: a study of innovation

Traditional accounting histories date the advent of sophisticated cost accounting from the mid-1880\u27s and credit American innovators of Frederick Taylor\u27s scientific management movement with conceiving the new practices. However, it is counterintuitive to think the entrepreneurs of the British Industrial Revolution would not have developed costing techniques, given their significant methodological advances in other economic areas, such as technology, capital accumulation, and marketing structure development. This paper reports the findings from a survey of surviving business records from twenty-five large industrial firms during the 1760-1850 period, concentrated in the dominant textile and iron industries. Substantial evidence of mature cost management has been found in eight major areas of activity

Keratouveitis from Euphorbia cyparissias exposure is a temporal phenomenon

We present the case of an 82-year-old woman with severe keratouveitis secondary to exposure to the plant Euphorbia cyparissias during the month of August. Despite copious irrigation of both eyes, she developed a case of Euphorbia keratouveitis that was typical in its course. Exposure to plant sap from this species should be treated much like an alkaline chemical injury as the pH of the ocular surface may be elevated. E. cyparissias should be carefully handled as it may result in keratouveitis, especially in early autumn

Accuracy of Ultrasonography-Guided Fine-Needle Aspiration in Detecting Persistent Nodal Disease After Chemoradiotherapy

IMPORTANCE: Few patients with persistent adenopathy following chemoradiotherapy (CRT) for head and neck squamous cell carcinoma harbor viable disease. Improved selectivity for surgical salvage is needed to prevent unnecessary salvage neck dissection. OBJECTIVE: To determine whether ultrasonography-guided fine-needle aspiration (FNA) can be used to identify viable cancer cells in the lymph nodes of patients with persistent radiographic adenopathy following CRT. DESIGN, SETTING, AND PARTICIPANTS: A pilot study included patients undergoing preoperative ultrasonography-guided FNA of lymph nodes considered suspicious on radiography prior to planned neck dissection at a quaternary care facility from February 28, 2011, to March 18, 2013. Data analysis was performed from April 28 to December 24, 2013. Patients treated for head and neck squamous cell carcinoma with CRT who were determined to have persistent neck disease on a 6-week posttreatment computed tomographic scan of the neck and scheduled for salvage neck dissection were considered candidates for this pilot study. All patients enrolled in the study underwent ultrasonography-guided FNA of the suspicious lymph nodes within 2 weeks of the planned neck dissection. The cytopathologist reading the samples was blinded to the patient's identity. EXPOSURES: Fine-needle aspiration with a 23- to 25-gauge needle following CRT. MAIN OUTCOMES AND MEASURES: The accuracy of ultrasonography-guided FNA cytologic results was compared with the standard of surgical pathologic examination of neck dissection specimens. RESULTS: Fourteen patients (11 [79%] men; mean [SD] age, 57.8 [11.2] years) were enrolled in this pilot study; data were collected on 17 lymph nodes. Among these 14 patients with incomplete radiographic clinical response, 17 lymph node aspirations were performed. Ultrasonography-guided FNA identified squamous cell carcinoma in the aspirates of 4 (80%) of the 5 nodes with squamous cell carcinoma identified on pathologic testing and confirmed the absence of disease in the remaining 12 (71%) lymph nodes. The statistical analysis of these results revealed a sensitivity of 80%; specificity, 100%; positive predictive value, 100%; and negative predictive value, 92.3%. The diagnostic accuracy of ultrasonography-guided FNA at detecting residual persistent cancer was 88%. CONCLUSIONS AND RELEVANCE: This pilot study suggests that ultrasonography-guided FNA may be a feasible ancillary diagnostic imaging tool to imaging to assess patients with radiographic persistent disease prior to consideration of salvage neck dissection