Externally Powering Wireless Real-Time Locating System Tags

This publication describes techniques and apparatuses relating to powering wireless real‑time locating system tags (e.g., RTLS tags) through an external power source (e.g., an additional DC battery, connection to an AC power source). The external power source may be in addition to power supplied by the internal battery of the RTLS tag or in substitution of internal battery power. The techniques and apparatuses may include accessories utilized to externally power an RTLS tag through an external power source. One example accessory is utilized with a RTLS tag that includes a housing that can be opened by a consumer to replace the battery (e.g., by removal of a battery cover panel). In this example, the accessory is a replacement battery cover panel for the RTLS tag. By providing additional power to the RTLS tag, additional capabilities and use cases are possible. For example, use cases that benefit from lower latency and higher accuracy Angle of Arrival measurements

Computer simulation of blood flow in the human arm

http://www.worldcat.org/oclc/1306856

Experiences with remote linguistic-ethnobiological fieldwork on bird names in the Qaqet language of Papua New Guinea

Language-focused ethnobiological research can be a challenging endeavour, even when research teams are able to access their field sites and talk to consultants in person. The challenges are compounded when research must be carried out remotely. In this paper, we present our experiences in carrying out remote linguistic-ethnobiological research on bird names in the Qaqet language spoken in East New Britain Province, Papua New Guinea, with the participation of a locally based research assistant. We discuss the numerous issues faced by the researchers and the assistant and the steps we took collaboratively to overcome these issues. Ultimately, changes were required to the stimulus materials, interview protocol, and consultant selection procedure; these changes were implemented stepwise over a series of four field trips. The data obtained in the process provide the first reliable identifications of culturally important bird species in Qaqet, along with ethnographic reports of the role these birds play in Qaqet society and culture. This, and other preliminary findings on phenomena such as interindividual variation, has indicated fruitful avenues for research, following the end of the current global crisis.National Foreign Language Resource Cente

Characterization of Aerospike Nozzle Flows

Aerospike nozzles possess many qualities that make them more desirable and efficient than conventional bell-shaped rocket nozzles. Aerospike nozzles have been studied since the 1960s, but problems and limitations with experimentation often led to abandoning further efforts on aerospike nozzles and implementing much more familiar bell-shaped nozzles. In fact, aerospike nozzles have yet to be used in flight—they have only undergone ground testing. The goal of our research is to develop multiple additively manufactured aerospike nozzles and characterize the flow experimentally, numerically, and computationally. Schlieren photography and Particle Image Velocimetry (PIV) are used to experimentally characterize the flow, ANSYS CFD software and SolidWorks Flow Simulation are used to computationally analyze the nozzle flows, and hand calculations with the assistance of Matlab and Microsoft Excel are performed to analyze the nozzle flows numerically. Using these methods, we will study and compare the flows present in aerospike nozzles with a singular annular entrance as well as multiple orifice entries. To date, we have developed an experimental setup and procedure to study the nozzles we produce. Furthermore, using this setup we\u27ve successfully designed, manufactured, and analyzed a converging-diverging nozzle for our setup that produces supersonic flow—a necessary property of flow to accurately characterize nozzles use for aerospace applications. We hope that our research helps to develop a better understanding of aerospike nozzles and their many advantages over the bell nozzle, and motivates further research and eventually the implementation of aerospike nozzles in both aircraft and spacecraft.https://engagedscholarship.csuohio.edu/u_poster_2016/1052/thumbnail.jp

Material Management: A Sustainable Way to Reduce the Wastage

In today’s world construction work are going at unexpected speed in all area like building, bridge, high-rise and so on. As we know there are two side of coin same way there are some disadvantage of this speedy construction which leads towards a wastage, like Material, Money, Time, and so on. One of the most important part of wastage is due to Improper Material Management. If we not prepare good management technic of material management than it convert in to wastage. It shall be very hard to manage wastage rather than managing the material. So if we want to manage the waste we need to manage the material in Proper Way. For that first of all we need to find out the importance of Phases of Material Management and Crucial Factors which affects the material management

Fin-Guided Fuel Injection Enhancements for Low Aspect Ratio Scramjet Combustors

Characterization of a three-dimensional Mach 2 scramjet combustor with aspect ratio one has been conducted in order to provide baseline performance data. The maximum combustion performance was achieved at an equivalence ratio of 0.25 due to poor mixing. Subsequent fuel injection studies investigated transverse and ramped parallel mixing schemes in a Mach 2 duct. It was shown ramped injection required too high of flow blockage to be practical for efficient mixing. From these studies a new Fin-Guided fuel injection technique was established. Substantial improvement in mixing performance was observed through pressure traces, Schlieren and Mie-scattering. With the use of Fin-Guided Injection the fuel penetration height was increased by 100~120% and the flow losses associated with jet-induced shocks were reduced by 13~30% over injection without a fin. The results open up the possibility of further increasing performance by optimizing the fin height and the fuel injection angle behind the fin

Cecal Schwannoma: A Rare Cause of Gastrointestinal Bleeding in a Young Woman with Review of Literature

Schwannomas are rare mesenchymal tumors of the gastrointestinal tract. Occurrence of these tumors is more common in the stomach than in the large intestine. These tumors usually present as polypoidal intraluminal lesions and based on their location can present with rectal bleeding, colonic obstruction, and abdominal pain or defecation disorders. We present a case of a thirty-five-year-old woman who presented with abdominal pain and melena. Patient was diagnosed with a nonobstructing superficially ulcerated mass in the cecum on colonoscopy and required right hemicolectomy. A very rare pathological diagnosis of cecal schwannoma was made postoperatively

An Inflammatory Fibroid Polyp in the Hepatic Flexure of the Colon Treated with Argon Plasma Coagulation, Endoscopic Clipping and Polypectomy

Inflammatory fibroid polyp (IFP) is a rare benign polypoid lesion of the gastrointestinal tract. Most IFPs occur in the stomach and colonic occurrence is very rare. Histologically IFP is characterized by a mixture of numerous small vessels, fibroblasts and edematous connective tissue associated with marked inflammatory infiltration by eosinophils. We present a rare case of a pedunculated IFP in the hepatic flexure of the colon treated successfully with a combination of argon plasma coagulation, endoclipping and polypectomy. A 74-year-old asymptomatic female underwent a screening colonoscopy in our hospital. A 12-mm pedunculated polyp was found at the hepatic flexure of the colon. After saline injection, we attempted to remove the polyp with a hot snare. However the polyp stalk was extremely difficult to resect despite several attempts with the hot snare. We placed an endoclip at the base of the stalk and then applied argon plasma coagulation at 1.0 l/min and 40 W. After these measures we were able to resect the stalk and the polyp was retrieved. Histologically the polyp was located in the submucosa of the gastrointestinal tract. Proliferation of spindle cells and infiltration of inflammatory cells such as plasma cells and eosinophils were observed. The spindle cells were positive for CD34 and S100 but negative for c-kit and muscle markers. These findings are consistent with a histopathological diagnosis of IFP