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1

Joint Advanced Warfighting School.  

National Technical Information Service (NTIS)

When the United States employs military power, it does so as a joint force. The cornerstone for effective joint force employment remains Service competency, but truly effective Service warfighters must think, plan and fight jointly. The key to developing ...

J. M. Davis K. C. Bowen L. W. Schonenberg

2003-01-01

2

Understanding Joint Warfighting Experiments.  

National Technical Information Service (NTIS)

In October 1998 the United States Joint Forces Command (USJFCOM) established a Joint Warfighting Experimentation program to support Joint Concept Development. Experimentation is the unique scientific method for establishing whether hypothesized concepts a...

R. A. Kass

2001-01-01

3

Intelligence Education for Joint Warfighting.  

National Technical Information Service (NTIS)

In June 1998 the Joint Military Intelligence College (JMIC) opened a new era by expanding education in this area for the military, intelligence professionals, and other members of the national security community at large with the introduction of an underg...

A. D. Clift

1999-01-01

4

Japanese Campaign in Malaya: December 1941-February 1942, A Study in Joint Warfighting.  

National Technical Information Service (NTIS)

Joint warfighting doctrine has continued to evolve since World War II, and most recently has become an issue of substantial focus and development within the U.S. military. Today it is recognized that the significance of joint warfighting is its potential ...

D. J. Mollahan T. J. DeVine R. A. Victor E. Mayer

2002-01-01

5

Rapid Decisive Operations. The Search for the Holy Grail of Joint Warfighting.  

National Technical Information Service (NTIS)

This study examines the concept of Rapid Decisive Operations (RDO) and seeks to answer the question of whether or not Rapid Decisive Operations is an achievable concept for the establishment of future Joint Warfighting Doctrine. This study starts with a d...

D. R. Hogg

2002-01-01

6

Command and Control Experimentation Lessons Learned From the US Army Division Advanced Warfighting Experiment (DAWE).  

National Technical Information Service (NTIS)

The purpose of this paper is to identify command and control (C2) experimentation lessons learned from the data collection and analysis processes of the US Army Division XXI Advanced Warfighting Experiment (DAWE). These lessons learned will assist the ana...

D. W. Kroening L. Leath

2000-01-01

7

Video Teleconference (VTC) Capability. An Assessment of Battle Command Advanced Warfighting Experiment Observations.  

National Technical Information Service (NTIS)

The purpose of this paper is to briefly describe the video teleconference (VTC) capability as applied to battle command in the Advanced Warfighting Experiments (AWE) in the Battle Command Battle Laboratory (BCBL), January - May, 1994. The BCBL had the mis...

M. C. Ingram

1994-01-01

8

Warfighter nutrition: current opportunities and advanced technologies report from a Department of Defense workshop.  

PubMed

The Uniformed Services University hosted a conference in July 2008 entitled "Warfighter Nutrition: Advanced Technologies and Opportunities" with Health Affairs and the Defense Advanced Research Projects Agency to develop strategic and tactical plans that could enhance Force Health Protection (FHP) by optimizing warfighter nutrition within the Department of Defense (DoD). The conference focused on three aspects of military nutrition: (1) fueling the forces, or garrison feeding; (2) performance optimization or operational feeding during deployment; and (3) nutritional interventions to support health reset and healing. Presentations by speakers addressed practical interventions (i.e., ready for implementation now) and advanced technologies (i.e., approaches meriting prioritized research and development efforts to transition into application). The conference concluded that nutritional optimization represents an integral and proactive approach to prevent illness, injury, and performance degradation throughout all phases of military service. The overarching consensus achieved was that warfighter nutrition, as a cornerstone of FHP, warrants the critical attention of both medical and line leadership to move quickly to support current initiatives and future advanced technologies. PMID:19685836

Deuster, Patricia A; Weinstein, Ali A; Sobel, Annette; Young, Andrew J

2009-07-01

9

Team C4ISR and Industry ... Partnering in Support of the Joint Warfighter.  

National Technical Information Service (NTIS)

This document contains briefing charts for the 2004 Advance Planning Briefing for Industry (APBI). The theme of this year's conference is 'Team C4ISR and Industry Partnering in Support of the Joint W&fighter.' Global security demands one flexible, formida...

2004-01-01

10

Extending simulation-based acquisition (SBA) to the warfighter with the Air Force Joint Synthetic Battlespace (JSB-AF)  

Microsoft Academic Search

The Air Force has vectored in a new direction to expand its investment in advanced simulation technologies to improve our readiness, lower costs, and dominate the battles of tomorrow. One of the critical initiatives in this direction is the Joint Synthetic Battlespace (JSB). The JSB will provide an integrated Modeling and Simulation (M&S) environment that brings together analysis, training, and

Phil Faye; Emily Andrew; Jayson Lee

2001-01-01

11

Actionable Intelligence for the Warfighter  

Microsoft Academic Search

1. ABSTRACT Lockheed Martin Advanced Technology Laboratories (LM ATL) has researched and developed Situation Understanding technologies to provide tailored, Actionable Intelligence to the individual warfighter. Situation Understanding (SU) is a core requirement of the Future Combat Systems and programs such as the Distributed Common Ground Station - Army (DCGS-A) and the Aerial Common Sensor (ACS). LM ATL has developed an

Nicholas Morizio; Sergio Gigli; Angela Pawlowski

12

Space-based radar representation in the advanced warfighting simulation (AWARS)  

NASA Astrophysics Data System (ADS)

Space and orbiting systems impact multiple battlefield operating systems (BOS). Space support to current operations is a perfect example of how the United States fights. Satellite-aided munitions, communications, navigation and weather systems combine to achieve military objectives in a relatively short amount of time. Through representation of space capabilities within models and simulations, the military will have the ability to train and educate officers and soldiers to fight from the high ground of space or to conduct analysis and determine the requirements or utility of transformed forces empowered with advanced space-based capabilities. The Army Vice Chief of Staff acknowledged deficiencies in space modeling and simulation during the September 2001 Space Force Management Analsyis Review (FORMAL) and directed that a multi-disciplinary team be established to recommend a service-wide roadmap to address shortcomings. A Focus Area Collaborative Team (FACT), led by the U.S. Army Space & Missile Defense Command with participation across the Army, confirmed the weaknesses in scope, consistency, correctness, completeness, availability, and usability of space model and simulation (M&S) for Army applications. The FACT addressed the need to develop a roadmap to remedy Space M&S deficiencies using a highly parallelized process and schedule designed to support a recommendation during the Sep 02 meeting of the Army Model and Simulation Executive Council (AMSEC).

Phend, Andrew E.; Buckley, Kathryn; Elliott, Steven R.; Stanley, Page B.; Shea, Peter M.; Rutland, Jimmie A.

2004-09-01

13

Warfighter IT Interoperability Standards Study.  

National Technical Information Service (NTIS)

This report explains the findings and recommendations of the Warfighter Information Technology lnteroperability Standards (WITIS) Study on the standards available to facilitate interoperability across the IT systems developed to support Warfighters. The s...

J. Seeley P. Morosoff R. Bleach

2012-01-01

14

Integrated Warfighter Biodefense Program (IWBP).  

National Technical Information Service (NTIS)

This report outlines Quantum Leap Innovations, Inc. (QLI) accomplishments during the three months of performance between September 30, 2011 and December 31, 2011 on ONR Contract N00014-10-C-0363 for the Integrated Warfighter Biodefense Program (IWBP). The...

G. Vaidyanathan

2012-01-01

15

Integrated Warfighter Biodefense Program (IWBP).  

National Technical Information Service (NTIS)

This report outlines Quantum Leap Innovations, Inc. (QLI) accomplishments during the three months of performance between June 30, 2011 and September 30, 2011 on ONR Contract N00014-10-C-0363 for the Integrated Warfighter Biodefense Program (IWBP). The rep...

G. Vaidyanathan

2011-01-01

16

Accelerating data for the warfighter  

Microsoft Academic Search

A methodology for efficiently integrating geosynchronous satellite links into communications networks by employing modern digital technology, in particular the asynchronous transfer mode (ATM), is explained. The concept of seamless interoperability is examined, and a vital C4I US Army network (the Warfighter Information Network) which will employ ATM is described. ATM cell structure is explained, and it is shown that the

C. B. Cotner; T. Roberts

1998-01-01

17

Joint Institute for Advancement of Flight Sciences  

NASA Technical Reports Server (NTRS)

Experiments were designed, implemented, and evaluated in the thermal and fluid sciences at the NASA Langley Research Center. This research was conducted cooperatively with NASA employees using, where necessary, equipment and facilities provided by the U.S. Government. The research fell within the scope of the University Agreement between the NASA Langley Research Center and The George Washington University for Joint Research and Education Projects dated June 7, 8, 1994, which continues the Joint Institute for the Advancement of Flight Sciences (JIAFS).

Cutler, Andrew D.

1999-01-01

18

Findings from Advanced Technology Program's (ATP's) Survey of Joint Ventures.  

National Technical Information Service (NTIS)

The Advanced Technology Program (ATP) conducted a survey of all joint ventures that received an ATP award between 1991 and 2001. The survey was conducted to understand the motivations and impacts of joint venture collaborations. The findings show that the...

A. Wang J. O'Brien K. McTigue S. Shipp

2006-01-01

19

Optical communication line-of-sight analysis for dismounted warfighter  

NASA Astrophysics Data System (ADS)

Optical communications between a dismounted warfighter and his weapon-mounted scope increases warfighting capability. Since optical communication requires line-of-sight, typical movements of a dismounted warfighter during military missions and their effect on line-of-sight were investigated. Video analysis demonstrates technological transition feasibility for this application and provides the asis for future testing standards.

Geng, Jiayi; Nicholson, Gail

2013-05-01

20

Joint Institute for Advancement of Flight Sciences  

NASA Technical Reports Server (NTRS)

The Aeroacoustics Research Program is an integral part of the Joint Institute for Advancement of Flight Sciences at The George Washington University. It is affiliated with many civil, mechanical, and environmental engineering courses, particularly those that stress theory and numerical or other analytic methods in engineering. This report lists the courses presented, the names of graduate research assistants, and bibliographic information regarding publications and presentations. Three graduate degrees were awarded and the abstracts of each dissertation is included. The dissertations were as follows: "A Numerical Investigation of Thermoacoustic Oscillations", which discusses advances in the study of acoustic phenomena through the use of computational aeroacoustics. "Computation of Vortex Shedding and Radiated Sound for a Circular Cylinder: Subcritical to Transcritical Reynolds Numbers", which discusses predicting tonal noise generated by vortex shedding from a circular cylinder. And finally, "The Radiated Field Generated by a Monopole Source in a Short, Rigid, Rectangular Duct", which develops a method for modeling the acoustic field generated by a monopole source placed in a moving rectangular duct.

1998-01-01

21

Unmanned Aerial Vehicles -- Benefits to the Warfighter.  

National Technical Information Service (NTIS)

From the first crude aerial vehicles to the current systems, unmanned aerial vehicles (UAVs) have sought to garner some advantage over the enemy. The benefits to the warfighter also have evolved over the years from basic delivery platforms to enhanced sur...

S. Yadali

2006-01-01

22

Cultural Tactical Advisor for Warfighters in the Urban Battlespace.  

National Technical Information Service (NTIS)

We are developing a mobile handheld system that provides tactical and cultural advice to warfighters. The system fuses built-in knowledge of social factors and location specific information with dynamically entered situation descriptions to produce an ass...

A. Ruvinsky B. Mendoza J. Vidal M. Huhns S. Langevin

2006-01-01

23

Training table to the battlefield: protein recommendations for warfighters.  

PubMed

Warfighters represent a population of athletes for whom routine training and physical expectations for military operations parallel, and very often exceed, those of their civilian counterparts. Like athletes, warfighters require nutrition support to optimize physical condition to maintain training, sustain performance, speed recovery, and prevent injury and illness. Specifically, energy and protein requirements have been tailored for these populations. Like athletes, warfighters consider protein a critical component of their diet and often incorporate protein supplements into daily diet plans. This article highlights sports nutrition principles that target energy and protein needs of athletes, considers the basis of these recommendations in the context of protein supplementation, and asserts that translating these recommendations to the warfighter is appropriate and necessary. The recommended range of protein intake of 1.2-1.8 g · kg (- 1) · d (- 1) can be extended to the warfighter. Because energy balance is pivotal to optimal protein utilization, adequate energy intake or lack thereof such that a state of negative energy balance exists, should be given particular consideration for the warfighter. Routine protein supplementation is recommended to reduce protein breakdown, support protein synthesis, and promote a positive net protein balance throughout various deployment situations and when energy intake is insufficient. PMID:24027183

Rodriguez, Nancy R

2013-11-01

24

The joint DOD/NASA Advanced Launch System (ALS) programme  

NASA Astrophysics Data System (ADS)

The joint Department of Defense (DOD)/NASA Advanced Launch Systems (ALS) program is described. The ALS is cost rather than performance optimized. It will use advanced technology and innovative management and design approaches to achieve a congressionally mandated cost goal of $300 per pound to low-earth orbit by the year 2005. The space system acquisition approach is described. The influence of acquisition and technological innovations on other U.S. space transportation, programs such as commercial programs and the National Aero-Space Plane, is discussed. Diagrams of possible launch configurations are presented.

Wolfe, M. G.

1989-08-01

25

Delivering SSA Capabilities to the Warfighter  

NASA Astrophysics Data System (ADS)

The Space Superiority Systems Wing at the Space and Missile Center (SMC/SY) equips US forces with Offensive Counterspace (OCS), Defensive Counterspace (DCS), and Space Situation Awareness (SSA) systems that further enhance space superiority. The Technology Division (SYT) mission is to identify, develop, and transition cutting-edge technologies to the warfighter. SYT invests in the most relevant technologies for SSA, DCS and OCS that enhance SMC/SY's portfolio. This presentation will provide an overview of the SMC/SY SSA Technology being worked and highlights several key programs. The presentation will also highlight how the SMC/SY SSA efforts fit into to a Space Superiority Architecture. SYT executes its own Space Control Technology program line and leverages technologies from various DoD and national laboratories, Federally Funded Research and Development Companies, national agencies, industry and academia to accomplish their mission. The portions of the SY FY06 SSA portfolio that will be discussed are: Precision Metrics, Star Sensor Studies, Multi-mission Deployable Optical System, Intelligent Agent Data Fusion efforts, ESSA ACTD and the GReAT tech demo.

van Weezendonk, J.; Sherk, J.; Ryan, T.; McGuire, R.

26

Navy JFACC: Are We Supporting the Warfighters.  

National Technical Information Service (NTIS)

The employment of joint air forces to support the Joint Force Commander's (JFC) operation is done through the designation of a Joint Air Force Component Commander (JFACC) to synchronize and integrate these forces under a central command and control (C2) p...

R. B. Scholl

2002-01-01

27

Life-Signs Determination Model for Warfighter Physiological Status Monitoring.  

National Technical Information Service (NTIS)

The U.S. Army is leading an effort for a Warfighter Physiological Status Monitoring (WPSM) system that interprets data from a suite of wearable physiological sensors to infer a soldier's current health status on the battlefield. The future WPSM syste...

M. Borsotto C. T. Savell J. Reifman R. W. Hoyt G. Nunns

2004-01-01

28

Development of a comprehensive logistics and warfighting simulation system.  

SciTech Connect

An efficient logistics system is critical to the success of military operations. Recently, the Department of Defense (DoD) has begun to move from a ''just in case'' logistics system that relies on large stores of inventoried materials toward a ''just in time'' system based on obtaining and delivering supplies when and where they are needed. For this new logistics concept to operate smoothly and responsively and be highly robust, one must understand the interrelationships between warfighting and logistics, such as the impact of losses of logistics links/nodes and the changing pace of warfighting operations. Two DoD programs, the Distributed Intelligent Agents for Logistics (DIAL) and the Warfighting Logistics Technology and Assessment Environment (WLTAE), are focusing on different aspects of this problem. These programs are being integrated to develop a Comprehensive Logistics and Warfighting System (CLAWS) that can be used to address a variety of different logistics applications in the military arena. In this paper, we describe how CLAWS will be developed, including the development of a generalized Federation Object Model that could be used in a variety of logistics and military operations applications.

Hummel, J. R.

1998-08-12

29

Unmanned systems initiative: supporting immediate warfighter needs and army transformation  

Microsoft Academic Search

Unmanned systems have emerged as a critical warfighting capability for operation Iraqi freedom (OIF) and operation enduring freedom (OEF) and form a cornerstone of the Army's transformational flagship program, future combat systems (FCS). The unmanned systems initiative (USI), a congressionally supported program managed by the US Army Aviation and Missile Research, Development and Engineering Center (AMRDEC), is responding to these

P. B. DiNardo; S. B. Andrews

2005-01-01

30

Situation awareness for teams of dismounted warfighters and unmanned vehicles  

NASA Astrophysics Data System (ADS)

Changes in military operations in recent years underscore changes in the requirements of military units. One of the largest underlying changes is the transformation from large-scale battles to quick-reaction mobile forces. There is also pressure to reduce the number of warfighters at risk in operations. One resultant need of these two factors is the increased need for situation awareness (SA); another is the use of unmanned vehicles, which increases the difficulty for the dismounted warfighter to maintain SA. An augmented reality (AR) system is a type of synthetic vision system that mixes computer-generated graphics (or annotations) with the real world. Annotations provide information aimed at establishing SA and aiding decision making. The AR system must decide what annotations to show and how to show them to ensure that the display is intuitive and unambiguous. We analyze the problem domain of military operations in urban terrain. Our goal is to determine the utility a synthetic vision system like AR can provide to a dismounted warfighter. In particular, we study the types of information that a warfighter is likely to find useful when working with teams of other warfighters. The problem domain is challenging because teammates may be occluded by urban infrastructure and may include unmanned vehicles operating in the environment. We consider the tasks of dynamic planning and deconfliction, navigation, target identification, and identification of friend or foe. We discuss the issues involved in developing a synthetic vision system, the usability goals that will measure how successful a system will be, and the use cases driving our development of a prototype system.

Livingston, Mark A.; Julier, Simon J.; Brown, Dennis G.

2006-06-01

31

Focus on China. Joint Force Quarterly, Issue 47, 4th Quarter 2007.  

National Technical Information Service (NTIS)

Partial contents: JFQ DIALOGUE -- Joint Doctrine Update; Logistics Visibility: Enabling Effective Decisionmaking, by C. V. Christianson; Joint Special Operations Warfighter Certificate, by John S. Prairie and Frank X. Reidy. FORUM -- Executive Summary of ...

D. H. Gurney

2007-01-01

32

Joint Improvised Explosive Device Defeat Organization Annual Report 2010.  

National Technical Information Service (NTIS)

For five years, the critical purpose of the Joint Improvised Explosive Device (IED) Defeat Organization (JIEDDO) has been to rapidly provide counter-IED (C-IED) capabilities to warfighters. JIEDDO has provided significant support along three lines of effo...

2010-01-01

33

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

The development of several types of graphite/polyimide (GR/PI) bonded and bolted joints is reported. The program consists of two concurrent tasks: (1) design and test of specific built up attachments; and (2) evaluation of standard advanced bonded joint concepts. A data base for the design and analysis of advanced composite joints for use at elevated temperatures (561K (550 deg F)) to design concepts for specific joining applications, and the fundamental parameters controlling the static strength characteristics of such joints are evaluated. Data for design and build GR/PI of lightly loaded flight components for advanced space transportation systems and high speed aircraft are presented. Results for compression and interlaminar shear strengths of Celion 6000/PMR-15 laminates are given. Static discriminator test results for type 3 and type 4 bonded and bolted joints and final joint designs for TASK 1.4 scale up fabrication and testing are presented.

1981-01-01

34

The Analysis of Adhesively Bonded Advanced Composite Joints Using Joint Finite Elements  

NASA Technical Reports Server (NTRS)

The design and sizing of adhesively bonded joints has always been a major bottleneck in the design of composite vehicles. Dense finite element (FE) meshes are required to capture the full behavior of a joint numerically, but these dense meshes are impractical in vehicle-scale models where a course mesh is more desirable to make quick assessments and comparisons of different joint geometries. Analytical models are often helpful in sizing, but difficulties arise in coupling these models with full-vehicle FE models. Therefore, a joint FE was created which can be used within structural FE models to make quick assessments of bonded composite joints. The shape functions of the joint FE were found by solving the governing equations for a structural model for a joint. By analytically determining the shape functions of the joint FE, the complex joint behavior can be captured with very few elements. This joint FE was modified and used to consider adhesives with functionally graded material properties to reduce the peel stress concentrations located near adherend discontinuities. Several practical concerns impede the actual use of such adhesives. These include increased manufacturing complications, alterations to the grading due to adhesive flow during manufacturing, and whether changing the loading conditions significantly impact the effectiveness of the grading. An analytical study is conducted to address these three concerns. Furthermore, proof-of-concept testing is conducted to show the potential advantages of functionally graded adhesives. In this study, grading is achieved by strategically placing glass beads within the adhesive layer at different densities along the joint. Furthermore, the capability to model non-linear adhesive constitutive behavior with large rotations was developed, and progressive failure of the adhesive was modeled by re-meshing the joint as the adhesive fails. Results predicted using the joint FE was compared with experimental results for various joint configurations, including double cantilever beam and single lap joints.

Stapleton, Scott E.; Waas, Anthony M.

2012-01-01

35

Trapezial tilt: A radiographic correlation with advanced trapeziometacarpal joint arthritis  

Microsoft Academic Search

Trapeziometacarpal (TMC) joint arthritis is a common and debilitating condition of the hand. We defined a radiographic measure of trapezial inclination (trapezial tilt) and found a positive correlation between an increased trapezial tilt and severity of TMC joint arthritis. Radiographs (Robert's views) were obtained from 50 pairs of normal hands to evaluate the trapezial tilt to assess radial inclination of

Paul C. Bettinger; Ronald L. Linscheid; William P. Cooney; Kai-Nan An

2001-01-01

36

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

The design and evaluation of built-up attachments and bonded joint concepts for use at elevated temperatures is documented. Joint concept screening, verification of GR/PI material, fabrication of design allowables panels, definition of test matrices, and analysis of bonded and bolted joints are among the tasks completed. The results provide data for the design and fabrication of lightly loaded components for advanced space transportation systems and high speed aircraft.

Koumal, D. E.

1979-01-01

37

ADVANCED 100% SOLIDS RIGID POLYURETHANE COATINGS TECHNOLOGY FOR PIPELINE FIELD JOINTS AND REHABILITATION  

Microsoft Academic Search

This paper describes an advanced 100% solids rigid (or structural) polyurethane technology for field- applied coating of pipeline girth welded joints and pipeline rehabilitation for oil\\/gas and water\\/wastewater transmission lines. This technology applies either a castable type resin or a sprayable resin in the field, and allows for encapsulating or coating of steel pipeline joints, or sections, in minutes under

Shiwei William Guan

38

Warfighter Auditory Situation Awareness: Locating the Shooter with and without Hearing Protection.  

National Technical Information Service (NTIS)

Noise induced hearing loss (NIHL) is the most common military disability. One third of soldiers from Iraq and Afghan theaters have NIHL. The hearing-impaired warfighter may pose a liability to himself and others in combat operations. Warfighters have litt...

J. G. Casali J. P. Keady K. Talcott M. Killion

2011-01-01

39

Operation Sea Lion: A Joint Critical Analysis.  

National Technical Information Service (NTIS)

Military history contains many lessons from which the warfighting doctrine of the individual services, as well as joint doctrine, is derived. World War II stands as one of the major contributors of valuable lessons learned. From a joint and combined warfi...

R. McCanne G. D. Olson D. E. Teicher

2002-01-01

40

Computer-Mediated Training Tools to Enhance Joint Task Force Cognitive Leadership Skills.  

National Technical Information Service (NTIS)

This project describes a computer-mediated cognitive leadership training program for helping leaders of a Joint Task Force overcome cultural barriers between services. The program focuses on the brigade level (and higher) echelons of service warfighting u...

I. Linkov G. Fenton F. K. Satterstrom R. Gaskins B. Lewis

2007-01-01

41

Virtual Welded - Joint Design Integrating Advanced Materials and Processing Technology  

SciTech Connect

Virtual Welede-Joint Design, a systematic modeling approach, has been developed in this project to predict the relationship of welding process, microstructure, properties, residual stress, and the ultimate weld fatique strength. This systematic modeling approach was applied in the welding of high strength steel. A special welding wire was developed in this project to introduce compressive residual stress at weld toe. The results from both modeling and experiments demonstrated that more than 10x fatique life improvement can be acheived in high strength steel welds by the combination of compressive residual stress from the special welding wire and the desired weld bead shape from a unique welding process. The results indicate a technology breakthrough in the design of lightweight and high fatique performance welded structures using high strength steels.

Yang, Zhishang; Ludewig, Howard W.; Babu, S. Suresh

2005-06-30

42

Enhancing Warfighter Cognitive Abilities with Transcranial Magnetic Stimulation: A Feasibility Analysis.  

National Technical Information Service (NTIS)

This study examined the feasibility of using transcranial magnetic stimulation (TMS) to enhance warfighter cognitive abilities. An extensive literature review was conducted and several TMS laboratories were visited. Discussions were also held with several...

J. T. Nelson

2007-01-01

43

Recent Advances in Artificial Hip-Joint Replacement  

PubMed Central

In Western society arthritis of the hip is a fairly common condition in the elderly. At an advanced stage of this condition, surgical treatment is almost always necessary. The various surgical options can be divided into the so-called “biological procedures” and “replacement”. The various biological or conservative operations have failed, in large part, to stand the tests of time and predictability, and have fallen by the wayside. It is worthwhile to describe briefly some of these earlier procedures. ImagesFigures 7a and 7bFigure 1Figures 2a and 2bFigure 3Figure 4Figure 5Figure 6

Cameron, Hugh U.

1987-01-01

44

Joint crisis plans and psychiatric advance directives in German psychiatric practice.  

PubMed

This study explores the attitude of German psychiatrists in leading positions towards joint crisis plans and psychiatric advance directives. This topic was examined by contacting 473 medical directors of German psychiatric hospitals and departments. They were asked to complete a questionnaire developed by us. That form contained questions about the incidence and acceptance of joint crisis plans and psychiatric advance directives and previous experiences with them. 108 medical directors of psychiatric hospitals and departments responded (response rate: 22.8%). Their answers demonstrate that in their hospitals these documents are rarely used. Among the respondents, joint crisis plans are more accepted than psychiatric advance directives. There is a certain uncertainty when dealing with these instruments. Our main conclusion is that German psychiatry needs an intensified discussion on the use of instruments for patients to constitute procedures for future critical psychiatric events. For this purpose it will be helpful to collect more empirical data. Furthermore, the proposal of joint crisis plans in psychiatric hospitals and departments should be discussed as well as the possibility of consulting an expert during the preparation of a psychiatric advance directive. PMID:23793058

Radenbach, Katrin; Falkai, Peter; Weber-Reich, Traudel; Simon, Alfred

2014-05-01

45

Incentives White Papers for Advanced Manufacturing Technology.  

National Technical Information Service (NTIS)

Technological superiority continues to be a critical foundational element for the U.S. military and the U.S. Warfighter. Virtually every facet of mission success depends on fielding of advanced technologies supporting superior capabilities of speed, agili...

C. Neal

2009-01-01

46

Information Technology: The Defense Advanced Research Projects Agency's Transition of Advanced Information Technology Programs.  

National Technical Information Service (NTIS)

Congress and DoD officials have voiced concern that technology has not quickly transitioned to the warfighter. The Defense Advanced Research Projects Agency's mission is to develop imaginative, innovative, and often high-risk research ideas offering a sig...

M. L. Ugone B. A. Burton M. E. Simpson G. A. Leighton R. L. Nickens

2002-01-01

47

Oil shale, tar sand, coal research advanced exploratory process technology, jointly sponsored research  

SciTech Connect

Accomplishments for the past quarter are presented for the following five tasks: oil shale; tar sand; coal; advanced exploratory process technology; and jointly sponsored research. Oil shale research covers oil shale process studies. Tar sand research is on process development of Recycle Oil Pyrolysis and Extraction (ROPE) Process. Coal research covers: coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology includes: advanced process concepts;advanced mitigation concepts; and oil and gas technology. Jointly sponsored research includes: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO[sub 2] HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde Group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; characterization of petroleum residue; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process; NMR analysis of samples from the ocean drilling program; in situ treatment of manufactured gas plant contaminated soils demonstration program; and solid state NMR analysis of naturally and artificially matured kerogens.

Speight, J.G.

1992-01-01

48

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

Results of an experimental program to develop several types of graphite/polyimide (GR/PI) bonded and bolted joints for lightly loaded flight components for advanced space transportation systems and high speed aircraft are presented. Tasks accomplished include: a literature survey; design of static discriminator specimens; design allowables testing; fabrication of test panels and specimens; small specimen testing; and standard joint testing. Detail designs of static discriminator specimens for each of the four major attachment types are presented. Test results are given for the following: (1) transverse tension of Celion 3000/PMR-15 laminate; (2) net tension of a laminate for both a loaded and unloaded bolt hole; (3) comparative testing of bonded and co-cured doublers along with pull-off tests of single and double bonded angles; (4) single lap shear tests, transverse tension and coefficient of thermal expansion tests of A7F (LARC-13 amide-imide modified) adhesive; and (5) tension tests of standard single lap, double lap, and symmetric step lap bonded joints. Also, included are results of a finite element analysis of a single lap bonded composite joint.

Barclay, D. L.

1980-01-01

49

Finite element analysis of the meniscectomised tibio-femoral joint: implementation of advanced articular cartilage models.  

PubMed

The article presents advanced computer simulations aimed at the accurate modelling of human tibio-femoral joints (TFJs) in terms of anatomy, physiological loading and constitutive behaviour of the tissues. The main objective of this research is to demonstrate the implications that the implementation of different articular cartilage models have on the prediction of the joint response. Several biphasic material constitutive laws are tested using a finite element package and compared to the monophasic linear elastic description, often still used to predict the instantaneous response of the cartilage in 3D knee models. Thus, the importance of adequately capturing the contribution of the interstitial fluid support is proved using a simplified 3D model; subsequently, a biphasic poroviscoelastic non-linear constitutive law is implemented to study the response of a patient-specific TFJ subjected to simplified walking cycles. The time evolution of stresses, pore pressure, contact areas and joint displacements is captured and compared with existing meniscectomised knee models. Contact pressures and areas obtained using the developed numerical simulations are in agreement with the existing experimental evidence for meniscectomised human knee joints. The results are then used to predict the most likely site for the origin of mechanical damage, i.e. the medial cartilage surface for the specific case analysed in the present contribution. Finally, future research directions are suggested. PMID:23452160

Mattei, Lorenza; Campioni, Eleonora; Accardi, Mario Alberto; Dini, Daniele

2014-11-01

50

Virtual Welded-Joint Design Integrating Advanced Materials and Processing Technologies  

SciTech Connect

The primary goal of this project is to increase the fatigue life of a welded-joint by 10 times and to reduce energy use by 25% through product performance and productivity improvements using an integrated modeling approach. The fatigue strength of a welded-joint is currently the bottleneck to design high performance and lightweight welded structures using advanced materials such as high strength steels. In order to achieve high fatigue strength in a welded-joint it is necessary to manage the weld bead shape for lower stress concentration, produce preferable residual stress distribution, and obtain the desired microstructure for improved material toughness and strength. This is a systems challenge that requires the optimization of the welding process, the welding consumable, the base material, as well as the structure design. The concept of virtual welded-joint design has been proposed and established in this project. The goal of virtual welded-joint design is to develop a thorough procedure to predict the relationship of welding process, microstructure, property, residual stress, and the ultimate weld fatigue strength by a systematic modeling approach. The systematic approach combines five sub-models: weld thermal-fluid model, weld microstructure model, weld material property model, weld residual stress model, and weld fatigue model. The systematic approach is thus based on interdisciplinary applied sciences including heat transfer, computational fluid dynamics, materials science, engineering mechanics, and material fracture mechanics. The sub-models are based on existing models with further development. The results from modeling have been validated with critical experiments. The systematic modeling approach has been used to design high fatigue resistant welds considering the combined effects of weld bead geometry, residual stress, microstructure, and material property. In particular, a special welding wire has been developed in this project to introduce compressive residual stress at weld toe for weld fatigue resistance.

Yang, Z.; Dong, P.; Liu, S.; Babu, S.; Olson, G.; DebRoy, T.

2005-04-15

51

Dynamic modeling and optimal joint torque coordination of advanced robotic systems  

NASA Astrophysics Data System (ADS)

The development is documented of an efficient dynamic modeling algorithm and the subsequent optimal joint input load coordination of advanced robotic systems for industrial application. A closed-form dynamic modeling algorithm for the general closed-chain robotic linkage systems is presented. The algorithm is based on the transfer of system dependence from a set of open chain Lagrangian coordinates to any desired system generalized coordinate set of the closed-chain. Three different techniques for evaluation of the kinematic closed chain constraints allow the representation of the dynamic modeling parameters in terms of system generalized coordinates and have no restriction with regard to kinematic redundancy. The total computational requirement of the closed-chain system model is largely dependent on the computation required for the dynamic model of an open kinematic chain. In order to improve computational efficiency, modification of an existing open-chain KIC based dynamic formulation is made by the introduction of the generalized augmented body concept. This algorithm allows a 44 pct. computational saving over the current optimized one (O(N4), 5995 when N = 6). As means of resolving redundancies in advanced robotic systems, local joint torque optimization is applied for effectively using actuator power while avoiding joint torque limits. The stability problem in local joint torque optimization schemes is eliminated by using fictitious dissipating forces which act in the necessary null space. The performance index representing the global torque norm is shown to be satisfactory. In addition, the resulting joint motion trajectory becomes conservative, after a transient stage, for repetitive cyclic end-effector trajectories. The effectiveness of the null space damping method is shown. The modular robot, which is built of well defined structural modules from a finite-size inventory and is controlled by one general computer system, is another class of evolving, highly versatile, advanced robotic systems. Therefore, finally, a module based dynamic modeling algorithm is presented for the dynamic coordination of such reconfigurable modular robotic systems. A user interactive module based manipulator analysis program (MBMAP) has been coded in C language running on 4D/70 Silicon Graphics.

Kang, Hee-Jun

52

Differential Brain Activation to Angry Faces by Elite Warfighters: Neural Processing Evidence for Enhanced Threat Detection  

PubMed Central

Background Little is known about the neural basis of elite performers and their optimal performance in extreme environments. The purpose of this study was to examine brain processing differences between elite warfighters and comparison subjects in brain structures that are important for emotion processing and interoception. Methodology/Principal Findings Navy Sea, Air, and Land Forces (SEALs) while off duty (n?=?11) were compared with n?=?23 healthy male volunteers while performing a simple emotion face-processing task during functional magnetic resonance imaging. Irrespective of the target emotion, elite warfighters relative to comparison subjects showed relatively greater right-sided insula, but attenuated left-sided insula, activation. Navy SEALs showed selectively greater activation to angry target faces relative to fearful or happy target faces bilaterally in the insula. This was not accounted for by contrasting positive versus negative emotions. Finally, these individuals also showed slower response latencies to fearful and happy target faces than did comparison subjects. Conclusions/Significance These findings support the hypothesis that elite warfighters deploy greater processing resources toward potential threat-related facial expressions and reduced processing resources to non-threat-related facial expressions. Moreover, rather than expending more effort in general, elite warfighters show more focused neural and performance tuning. In other words, greater neural processing resources are directed toward threat stimuli and processing resources are conserved when facing a nonthreat stimulus situation.

Paulus, Martin P.; Simmons, Alan N.; Fitzpatrick, Summer N.; Potterat, Eric G.; Van Orden, Karl F.; Bauman, James; Swain, Judith L.

2010-01-01

53

Detection of Common Warfighting Symbology (MIL-STD-2525) Air Symbols.  

National Technical Information Service (NTIS)

The Common Warfighting Symbology Standard Bravo version (MIL-STD- 2525B) is a contractual requirement for a number of Australian defence projects. To evaluate how well MIL-STD-2525B supports rapid and accurate detection of symbols in clutter the current s...

A. Arnold K. Fletcher S. Cockshell

2011-01-01

54

A Multi-Objective Advanced Design Methodology of Composite Beam-to-Column Joints Subjected to Seismic and Fire Loads  

NASA Astrophysics Data System (ADS)

A multi-objective advanced design methodology dealing with seismic actions followed by fire on steel-concrete composite full strength joints with concrete filled tubes is proposed in this paper. The specimens were designed in detail in order to exhibit a suitable fire behaviour after a severe earthquake. The major aspects of the cyclic behaviour of composite joints are presented and commented upon. The data obtained from monotonic and cyclic experimental tests have been used to calibrate a model of the joint in order to perform seismic simulations on several moment resisting frames. A hysteretic law was used to take into account the seismic degradation of the joints. Finally, fire tests were conducted with the objective to evaluate fire resistance of the connection already damaged by an earthquake. The experimental activity together with FE simulation demonstrated the adequacy of the advanced design methodology.

Pucinotti, Raffaele; Ferrario, Fabio; Bursi, Oreste S.

2008-07-01

55

A Multi-Objective Advanced Design Methodology of Composite Beam-to-Column Joints Subjected to Seismic and Fire Loads  

SciTech Connect

A multi-objective advanced design methodology dealing with seismic actions followed by fire on steel-concrete composite full strength joints with concrete filled tubes is proposed in this paper. The specimens were designed in detail in order to exhibit a suitable fire behaviour after a severe earthquake. The major aspects of the cyclic behaviour of composite joints are presented and commented upon. The data obtained from monotonic and cyclic experimental tests have been used to calibrate a model of the joint in order to perform seismic simulations on several moment resisting frames. A hysteretic law was used to take into account the seismic degradation of the joints. Finally, fire tests were conducted with the objective to evaluate fire resistance of the connection already damaged by an earthquake. The experimental activity together with FE simulation demonstrated the adequacy of the advanced design methodology.

Pucinotti, Raffaele [Department of Mechanics and Materials, Mediterranean University of Reggio Calabria, loc. Feo di Vito, Reggio Calabria, 89126 (Italy); Ferrario, Fabio; Bursi, Oreste S. [Department of Mechanical and Structural Engineering, University of Trento, via Mesiano 7, Trento, 38050 (Italy)

2008-07-08

56

Competency-Based Training: Adapting to Warfighter Needs.  

National Technical Information Service (NTIS)

Historically USAF Combat Air Forces (CAF) aircrews have trained under an event-based system, maintaining Combat Mission Ready status by accomplishing specified numbers of sortie types and events during the annual training cycle. Advances in training analy...

C. M. Colegrove W. Bennett

2006-01-01

57

Space Weather for the DoD Warfighter: An Agency Level Update  

NASA Astrophysics Data System (ADS)

The Space Weather Operations Center (Space WOC) at the Air Force Weather Agency (AFWA) is the DoD Warfighter's source for operational space weather support. The Space WOC utilizes real-time space weather observations and model output to obtain the situational awareness necessary for the creation tailored space weather products to the warfighter. AFWA Personnel located within space weather programs and technology branches are charged with obtaining and infusing operations with the latest in space weather analysis and forecast capability. This presentation will present an overview of current and near term capabilities, with particular emphasis on the integration of the Global Assimilative Ionospheric Measurements (GAIM) model and the Hakamata-Akasofu-Fry (HAF) solar wind model.

Nobis, T. E.

2006-12-01

58

Moral Competence for the Joint Warfighter: The Missing Element in Defense Transformation.  

National Technical Information Service (NTIS)

The United States Department of Defense (DoD) is currently engaged in a massive effort to transform America's military for the challenges of the 21st century. This transformation effort is focused on making structural, intellectual, and cultural changes t...

J. J. Price

2006-01-01

59

Trapezial arthroplasty with silicone rubber implantation for advanced osteoarthritis of the trapeziometacarpal joint of the thumb  

PubMed Central

Introduction Arthritis in the trapeziometacarpal joint of the thumb can cause swelling and loss of motion. Treatment options include arthrodesis, replacement arthroplasty and interposition arthroplasty. Our objective in this clinical study was to determine outcomes after trapezial arthroplasty with a silicone rubber implant and the relationship between self-reported and measured outcomes. Methods At the Hand and Upper Limb Centre, St. Joseph's Hospital, London, Ont., a tertiary care centre, we reviewed a series of 26 patients with advanced osteoarthritis who underwent silicone rubber trapezial arthroplasty. The follow-up averaged 6.5 years. We assessed the outcomes subjectively, and by clinical, functional and radiographic examination. Results Although 88% of patients reported some improvement in pain and satisfaction, when quantified the improvement was less impressive: only 5.7 (on a visual analogue scale of 1–10, poor–excellent) for pain and 5.6 for satisfaction. Superior subjective results were reported by patients older than 60 years. Osteoarthritic changes had caused pronounced functional impairment in the hands of patients who underwent surgery and those who did not, so that any long-term benefit of surgery was not measurable. Patients had difficulty manipulating both small and large objects on the Jebsen's hand function test. Peri-implant and carpal radiographic lytic changes were observed in 90% of patients. Six patients (20%) required revision surgery (3 early, 3 late), including 1 with a pathologic scaphoid fracture. Conclusions Although clinical, functional and radiographic results were poor, they did not predict either satisfaction or pain improvement reported by patients, illustrating the need for a comprehensive standardized outcome evaluation to make informed decisions on the value of surgical intervention for osteoarthritis of the trapeziometacarpal joint.

MacDermid, Joy C.; Roth, James H.; Rampersaud, Y. Raj; Bain, Gregory I.

2003-01-01

60

Warfighter-in-the-loop: mental models in airborne minefield detection  

NASA Astrophysics Data System (ADS)

The warfighter analyst in the data processing ground control station plays an integral role in airborne minefield detection system. This warfighter-in-the-loop (WIL) is expected to reduce the minefield false alarm rate by a factor of 5. In order to achieve such a significant false alarm reduction and to facilitate the development of an efficient WIL interface, it is critical to evaluate different aspects of WIL operations for airborne minefield detection. Recently, researchers at the University of Missouri-Rolla have developed a graphical user interface (HILMFgui) application using MATLAB to evaluate minefield detection performance for the operator. We conducted a series of controlled experiments with HILMFgui using ten participants. In these experiments, we video-recorded all the experiments and conducted post-experiment interviews to learn more about the usability of the interface and the cognitive processes involved in minefield detection. The effect of various factors including the availability of automatic target recognition (ATR), availability of zoom and time constraints were considered to evaluate their influence on operator performance. Qualitative results of the factors affecting the warfighter performance in the minefield detection loop are discussed. Through the qualitative data analysis, we observed two different types of participants (classified here as aggressive and cautious). We also identified three primary types of mental models: mine centric, mine-field centric, and logical placement. Those who used a primarily mine focus had a substantially higher false alarm rate than those whose mental models were more consistent with a mine-field centric or logical placement perspective.

Reddy, Madhu; Agarwal, Sanjeev; Hall, Richard; Brown, John; Woodard, Thomas; Trang, Anh

2005-06-01

61

Joint force protection advanced security system (JFPASS) "the future of force protection: integrate and automate"  

NASA Astrophysics Data System (ADS)

The United States Department of Defense (DoD) defines 'force protection' as "preventive measures taken to mitigate hostile actions against DoD personnel (to include family members), resources, facilities, and critical information." Advanced technologies enable significant improvements in automating and distributing situation awareness, optimizing operator time, and improving sustainability, which enhance protection and lower costs. The JFPASS Joint Capability Technology Demonstration (JCTD) demonstrates a force protection environment that combines physical security and Chemical, Biological, Radiological, Nuclear, and Explosive (CBRNE) defense through the application of integrated command and control and data fusion. The JFPASS JCTD provides a layered approach to force protection by integrating traditional sensors used in physical security, such as video cameras, battlefield surveillance radars, unmanned and unattended ground sensors. The optimization of human participation and automation of processes is achieved by employment of unmanned ground vehicles, along with remotely operated lethal and less-than-lethal weapon systems. These capabilities are integrated via a tailorable, user-defined common operational picture display through a data fusion engine operating in the background. The combined systems automate the screening of alarms, manage the information displays, and provide assessment and response measures. The data fusion engine links disparate sensors and systems, and applies tailored logic to focus the assessment of events. It enables timely responses by providing the user with automated and semi-automated decision support tools. The JFPASS JCTD uses standard communication/data exchange protocols, which allow the system to incorporate future sensor technologies or communication networks, while maintaining the ability to communicate with legacy or existing systems.

Lama, Carlos E.; Fagan, Joe E.

2009-09-01

62

Design, fabrication and test of graphite/polyimide composite joints and attachments for advanced aerospace vehicles  

NASA Technical Reports Server (NTRS)

Bonded and bolted designs are presented for each of four major attachment types. Prepreg processing problems are discussed and quality control data are given for lots 2W4604, 2W4632 and 2W4643. Preliminary design allowables test results for tension tests and compression tests of laminates are included. The final small specimen test matrix is defined and the configuration of symmetric step-lap joint specimens are shown. Finite element modeling studies of a double lap joint were performed to evaluate the number of elements required through the adhesive thickness to assess effects of various joint parameters on stress distributions. Results of finite element analyses assessing the effect of an adhesive fillet on the stress distribution in a double lap joint are examined.

Skoumal, D. E.

1980-01-01

63

Evaluation and Advancement of a Reinforced Concrete Beam-Column Joint Model  

Microsoft Academic Search

SUMMARY A previously proposed two-dimensional reinforced beam-column joint model (Lowes and Altoontash (1)) is evaluated through comparison of simulated and observed response for building sub-assemblages tested in the laboratory under pseudo-static simulated earthquake loading. An extensive set of experimental data that characterize the response of joints with details typical of post-1970's construction is compiled. The results of the evaluation include

Nilanjan MITRA; Laura N. LOWES

64

Advances in the processing, sterilization, and crosslinking of ultra-high molecular weight polyethylene for total joint arthroplasty.  

PubMed

Despite the recognized success and worldwide acceptance of total joint arthroplasty, wear is a major obstacle limiting the longevity of implanted UHMWPE components. Efforts to solve the wear problem in UHMWPE have spurred numerous detailed studies into the structure, morphology, and mechanical properties of the polymer at every stage of its production from original resin into stock material and final fabricated form. Scientific developments in this field are occurring at an accelerating rate, and periodic review of UHMWPE technology is therefore increasingly necessary. The present article provides a four-part comprehensive review of technological advancements in the processing, manufacture, sterilization, and crosslinking of UHMWPE for total joint replacements. The first part of this article describes the recently updated nomenclature of UHMWPE, including the process of resin production and conversion to stock material. The second part outlines the methods of manufacturing UHMWPE into joint replacement components and provides overviews of alternate forms of UHMWPE, namely carbon-fiber reinforced UHMWPE (Poly II) and UHMWPE recrystallized under high temperature and pressure (Hylamer). The third part summarizes the sterilization and degradation of UHMWPE. Newly developed methods for accelerating the oxidation of UHMWPE after sterilization (for preconditioning of test specimens), as well as methods for quantifying the oxidation of UHMWPE, are also discussed. Finally, the fourth part reviews the development and properties of crosslinked UHMWPE, a promising alternate biomaterial for total joint replacements. PMID:10503968

Kurtz, S M; Muratoglu, O K; Evans, M; Edidin, A A

1999-09-01

65

Entrapment of the Fifth Lumbar Spinal Nerve by Advanced Osteophytic Changes of the Lumbosacral Zygapophyseal Joint: A Case Report  

PubMed Central

A 54-year-old female patient had a 6-year history of backache and left sciatica. Five years earlier, she had undergone surgery in another hospital for left L4-5 disc herniation. Computed tomography revealed the ossified wall that enclosed the left L5 nerve root. There were also osteophytic changes in the left L5-S zygapophyseal joint. These osteophytes developed rostrally, along the left L5 nerve root, throug h the intervertebral foramina. We performed decompression surgery for the left L5 nerve root, and surgery resulted in symptomatic relief. We experienced a rare clinical presentation of osteophytic formation, with a specific configuration in relation to the nerve root. Surgeons should be aware of entrapment of the lumbar spinal nerve by advanced osteophytic changes occurring in the zygapophyseal joint after lumbar surgery.

Yuguchi, Takamichi; Iwatsuki, Koichi; Yoshimine, Toshiki

2012-01-01

66

Reset and Healing Break-Out Session Summary. Warfighter Nutrition: Advanced Technologies and Opportunities.  

National Technical Information Service (NTIS)

Clinical Recommendations: *All hospitalized DOD personnel should be given multiple vitamin / essential fatty acid supplements. The doses should be similar to that which is provided to NASA astronauts. *ASD Health Affairs should have staff assigned to coll...

2008-01-01

67

The joint DoD/NASA advanced launch system. Pathway to low-cost, highly operable space transportation  

NASA Astrophysics Data System (ADS)

In response to changing needs, a major change in U.S. space transportation policy has occurred in the last few years. The joint Department of Defense/National Aeronautics and Space Administration Advanced Launch System program (ALS) intends to respond to this change in policy. The program, initiated in July 1987, completed Phase I at the end of August 1988 and is currently in Phase II. The ALS is cost optimized, rather than performance optimized, and will utilize advanced technology and innovative management and design approaches to achieve an ambitious congressionally mandated cost goal of $300/lb to low Earth orbit by the year 2005. The technological innovations will directly benefit other U.S. space transportation programs, such as the commercial programs and the National Aero Space Plane (NASP).

Wolfe, Malcolm G.

68

Maxillo-mandibular counter-clockwise rotation and mandibular advancement with TMJ Concepts ® total joint prostheses  

Microsoft Academic Search

47 end-stage TMJ patients with high occlusal plane angulation, treated with TMJ custom-fitted total joint prostheses and simultaneous maxillo-mandibular counter-clockwise rotation were evaluated for pain and dysfunction presurgery (T1) and at the longest follow-up (T2). Patients subjectively rated their facial pain\\/headache, TMJ pain, jaw function, diet and disability. Objective functional changes were determined by measuring maximum interincisal opening (MIO) and

L. P. Pinto; L. M. Wolford; P. H. Buschang; F. H. Bernardi; J. R. Gonçalves; D. S. Cassano

2009-01-01

69

Deployed Warfighter Protection Research Program: Finding New Methods to Vanquish Old Foes (The United States Army Medical Department Journal, April-June 2008).  

National Technical Information Service (NTIS)

The Deployed Warfighter Protection research program (DWFP) is an initiative to develop and validate novel methods to protect United States military deployed abroad from threats posed by disease-carrying insects. Vector- borne diseases such as malaria, den...

D. A. Strickman G. B. White K. N. Dunemn S. E. Cope

2008-01-01

70

Studies and advances on joint source-channel encoding\\/decoding techniques in flow media communications  

Microsoft Academic Search

Joint source-channel coding\\/decoding (JSCC\\/JSCD) techniques in flow media communications have become a state-of-the-art and\\u000a one of the challenging research subjects in the spatial communication area. They have great application prospective and deep\\u000a impact in various manned space flights, satellite missions, mobile radio communications and deep-space explorations. In the\\u000a last few years, there have been influential achievements in JSCC\\/JSCD studies. This

Guofang Tu; Jianjun Liu; Can Zhang; Shaoshuai Gao; Shidong Li

2010-01-01

71

HYDROGEN STORAGE SOLUTIONS IN SUPPORT OF DOD WARFIGHTER PORTABLE POWER APPLICATIONS  

SciTech Connect

From Personal Digital Assistants (PDAs) to cell phones our high-tech world, today, is demanding smaller, lighter weight and higher capacity portable power devices. Nowhere has this personal power surge been more evident than in today's U.S Warfighter. The modern Warfighter is estimated to carry from 65 to 95 pounds of supplies in the field with over 30 pounds of this dedicated to portable power devices. These devices include computer displays, infrared sights, Global Positioning Systems (GPS), night vision and a variety of other sensor technologies. Over 80% of the energy needed to power these devices comes from primary (disposable) batteries. It is estimated that a brigade will consume as much as 7 tons of batteries in a 72 hour mission at a cost of $700,000. A recent comprehensive study on the energy needs of the future warrior published by the National Academy of Science in 2004 made a variety of recommendations for average power systems from 20 to 1,000 watts. For lower power systems recommendations included pursuing science and technology initiatives focused on: (1) 300 watt-hours per kilogram (Wh/kg) secondary battery technologies; (2) smart hybrids; and (3) fuel cells (with greater than 6 wt% hydrogen storage). Improved secondary (rechargeable) batteries may be the ideal solution for military power systems due to their ease of use and public acceptance. However, a 3X improvement in their specific energy density is not likely anytime soon. Today's Lithium Ion batteries, at about 150 Wh/kg, fall well short of the energy density that is required. Future battery technology may not be the answer since many experts do not predict more than a 2X improvement in Lithium battery systems over the next 10 years. That is why most auto companies have abandoned all electric vehicles in favor of fuel cells and hybrid vehicles. Fuel cells have very high specific energy densities but achieving high energy values will depend on the energy density and the storage method of its fuel. Improved methods of safely and efficiently storing larger amounts of hydrogen will be a key development area for portable fuel cell power systems. Despite their high potential energy, fuel cells exhibit low power densities. That is why many systems today are going hybrid. Hybrid systems typically combine low energy and high power components with high energy and low power components. Typical configurations include capacitors and fuel cells or batteries and fuel cells. If done correctly, a hybrid system often can have both high energy and high power density even higher than any of the individual components.

Motyka, T.

2009-01-06

72

Distance Learning in Advanced Military Education: Analysis of Joint Operations Course in the Taiwan Military  

ERIC Educational Resources Information Center

High-ranking officers require advanced military education in war tactics for future combat. However, line officers rarely have time to take such courses on campus. The conventional solution to this problem used to take the inefficient correspondence courses. Whereas Internet technologies progress, online course is the current trend for military…

Tung, Ming-Chih; Huang, Jiung-yao; Keh, Huan-Chao; Wai, Shu-shen

2009-01-01

73

Joint System Prognostics For Increased Efficiency And Risk Mitigation In Advanced Nuclear Reactor Instrumentation and Control  

SciTech Connect

The science of prognostics is analogous to a doctor who, based on a set of symptoms and patient tests, assesses a probable cause, the risk to the patient, and a course of action for recovery. While traditional prognostics research has focused on the aspect of hydraulic and mechanical systems and associated failures, this project will take a joint view in focusing not only on the digital I&C aspect of reliability and risk, but also on the risks associated with the human element. Model development will not only include an approximation of the control system physical degradation but also on human performance degradation. Thus the goal of the prognostic system is to evaluate control room operation; to identify and potentially take action when performance degradation reduces plant efficiency, reliability or safety.

Donald D. Dudenhoeffer; Tuan Q. Tran; Ronald L. Boring; Bruce P. Hallbert

2006-08-01

74

AFWA Space Weather Operations: Specifying and Forecasting the Operational Environment for the Warfighter  

NASA Astrophysics Data System (ADS)

The effects of space weather on modern military systems can range from mere annoyances to catastrophic system outages and failures. Knowing the timing and severity of mission-impacting space weather is crucial to mitigating and overcoming its effects. The 2nd Weather Squadron's Space Weather Flight at the Air Force Weather Agency (AFWA) faces the daily challenge of forecasting space weather to support US warfighters and other DoD customers. The forecaster's success depends on the combined efforts of other AFWA personnel involved in technology transition and space weather program management to deliver the latest technology to operations. As the DoD lead for space weather, AFWA provides timely, accurate, and relevant space weather data and forecasts. This presentation will give an overview of infrastructure that makes this possible, highlight the current state of the GAIM and HAF models, and explore future required capabilities. A new delivery of the Global Assimilation of Ionospheric Measurements (GAIM) model is on the horizon, as well as the delivery of the Space Weather Modeling System (SWMS), the first coupled solar wind-ionospheric model in operations. This will enhance the quality of the GAIM forecast out to 5 days.

Reich, J. P.; Davis, B. L.; Sattler, M. P.

2008-12-01

75

New Advances for a joint 3D inversion of multiple EM methods  

NASA Astrophysics Data System (ADS)

Electromagnetic (EM) methods are routinely applied to image the subsurface from shallow to regional structures. Individual EM methods differ in their sensitivities towards resistive and conductive structures as well as in their exploration depths. Joint 3D inversion of multiple EM data sets can result in significantly better resolution of subsurface structures than the individual inversions. Proper weighting between different EM data is essential, however. We present a recently developed weighting algorithm to combine magnetotelluric (MT), controlled source EM (CSEM) and DC-geoelectric (DC) data. It is well known that MT data are mostly sensible to regional conductive structures, whereas, CSEM and DC data are more suitable to recover more shallow and resistive structures. Our new scheme is based on weighting individual components of the total data gradient after each model update. Norms of each data residual are used to assess how much weight individual components of the total data gradient must have to achieve an equal contribution of all data sets in the inverse model. A numerically efficient way to search for appropriate weighting factors could be established by applying a bi-diagonalization procedure to the sensitivity matrix. Thereby, the original inverse problem can be projected onto a smaller dimension in which the search of weighting factors is numerically cheap. We demonstrate the efficiency of the proposed weighting schemes and explore the model domain with synthetic data sets.

Meqbel, N. M.; Ritter, O.

2013-12-01

76

'Most advanced, yet acceptable': typicality and novelty as joint predictors of aesthetic preference in industrial design.  

PubMed

Typicality and novelty have often been shown to be related to aesthetic preference of human artefacts. Since a typical product is rarely new and, conversely, a novel product will not often be designated as typical, the positive effects of both features seem incompatible. In three studies it was shown that typicality (operationalized as 'goodness of example') and novelty are jointly and equally effective in explaining the aesthetic preference of consumer products, but that they suppress each other's effect. Direct correlations between both variables and aesthetic preference were not significant, but each relationship became highly significant when the influence of the other variable was partialed out. In Study 2, it was furthermore demonstrated that the expertise level of observers did not affect the relative contribution of novelty and typicality. It was finally shown (Study 3) that a more 'objective' measure of typicality, central tendency - operationalized as an exemplar's average similarity to all other members of the category - yielded the same effect of typicality on aesthetic preference. In sum, all three studies showed that people prefer novel designs as long as the novelty does not affect typicality, or, phrased differently, they prefer typicality given that this is not to the detriment of novelty. Preferred are products with an optimal combination of both aspects. PMID:12648393

Hekkert, Paul; Snelders, Dirk; van Wieringen, Piet C W

2003-02-01

77

Proceedings of the joint contractors meeting: FE/EE Advanced Turbine Systems conference FE fuel cells and coal-fired heat engines conference  

SciTech Connect

The joint contractors meeting: FE/EE Advanced Turbine Systems conference FEE fuel cells and coal-fired heat engines conference; was sponsored by the US Department of Energy Office of Fossil Energy and held at the Morgantown Energy Technology Center, P.O. Box 880, Morgantown, West Virginia 26507-0880, August 3--5, 1993. Individual papers have been entered separately.

Geiling, D.W. [ed.

1993-08-01

78

Advances in tribological testing of artificial joint biomaterials using multidirectional pin-on-disk testers.  

PubMed

The introduction of numerous formulations of Ultra-high molecular weight polyethylene (UHMWPE), which is widely used as a bearing material in orthopedic implants, necessitated screening of bearing couples to identify promising iterations for expensive joint simulations. Pin-on-disk (POD) testers capable of multidirectional sliding can correctly rank formulations of UHMWPE with respect to their predictive in vivo wear behavior. However, there are still uncertainties regarding POD test parameters for facilitating clinically relevant wear mechanisms of UHMWPE. Studies on the development of POD testing were briefly summarized. We systematically reviewed wear rate data of UHMWPE generated by POD testers. To determine if POD testing was capable of correctly ranking bearings and if test parameters outlined in ASTM F732 enabled differentiation between wear behavior of various formulations, mean wear rates of non-irradiated, conventional (25-50kGy) and highly crosslinked (?90kGy) UHMWPE were grouped and compared. The mean wear rates of non-irradiated, conventional and highly crosslinked UHMWPEs were 7.03, 5.39 and 0.67mm(3)/MC. Based on studies that complied with the guidelines of ASTM F732, the mean wear rates of non-irradiated, conventional and highly crosslinked UHMWPEs were 0.32, 0.21 and 0.04mm(3)/km, respectively. In both sets of results, the mean wear rate of highly crosslinked UHMPWE was smaller than both conventional and non-irradiated UHMWPEs (p<0.05). Thus, POD testers can compare highly crosslinked and conventional UHMWPEs despite different test parameters. Narrowing the allowable range for standardized test parameters could improve sensitivity of multi-axial testers in correctly ranking materials. PMID:23831149

Baykal, D; Siskey, R S; Haider, H; Saikko, V; Ahlroos, T; Kurtz, S M

2014-03-01

79

Is there an optimal time for warfighters to supplement with protein?  

PubMed

Although nutritional requirements for warfighters will inevitably vary in accordance with job role and active-inactive duty cycling, somewhat generic recommendations do still apply. In considering aspects of "optimal" nutrient timing, it is important to outline singular and combinatorial relationships between protein intake and physical activity (e.g., exercise) in the context of the following: 1) skeletal muscle protein turnover, 2) functional recovery, and 3) adaptation to exercise. The essential amino acid (EAA) components of dietary protein are key macronutrients regulating muscle proteostasis, because they provide substrate to replenish muscle proteins lost during fasted periods. This occurs through a substantial, albeit short-lived (?2 h) EAA-induced stimulation of muscle protein synthesis (MPS) and via an insulin-mediated suppression of muscle protein breakdown (MPB) (via carbohydrate- and/or EAA-mediated insulin secretory effects). At rest, intake of protein (optimal range between 20 and 40 g of high-quality protein, equating to ?10-20 g EAAs) every ?4-5 h is advocated due to the refractoriness of MPS in response to continuous supply. Bouts of exercise also stimulate muscle protein turnover (increasing both MPS and MPB), but in the absence of protein intake net muscle protein balance remains negative such that exercise alone is catabolic. Intake of dietary protein redresses this balance through enhancing both the amplitude and duration of exercise-induced increases in MPS while concomitantly limiting MPB. These postexercise periods of positive net protein balance permit muscle adaptation and functional recovery. Finally, in relation to exercise, protein dosing (at a minimum of ?20 g) both in close proximity to exercise and thereafter every 4-5 h during waking hours (including before bedtime) is likely optimal for adaptation/functional recovery. PMID:24027179

Atherton, Philip James

2013-11-01

80

Advanced Forward Modeling and Inversion of Stokes Profiles Resulting from the Joint Action of the Hanle and Zeeman Effects  

NASA Astrophysics Data System (ADS)

A big challenge in solar and stellar physics in the coming years will be to decipher the magnetism of the solar outer atmosphere (chromosphere and corona) along with its dynamic coupling with the magnetic fields of the underlying photosphere. To this end, it is important to develop rigorous diagnostic tools for the physical interpretation of spectropolarimetric observations in suitably chosen spectral lines. Here we present a computer program for the synthesis and inversion of Stokes profiles caused by the joint action of atomic level polarization and the Hanle and Zeeman effects in some spectral lines of diagnostic interest, such as those of the He I 10830 Å and 5876 Å (or D3) multiplets. It is based on the quantum theory of spectral line polarization, which takes into account in a rigorous way all the relevant physical mechanisms and ingredients (optical pumping, atomic level polarization, level crossings and repulsions, Zeeman, Paschen-Back, and Hanle effects). The influence of radiative transfer on the emergent spectral line radiation is taken into account through a suitable slab model. The user can either calculate the emergent intensity and polarization for any given magnetic field vector or infer the dynamical and magnetic properties from the observed Stokes profiles via an efficient inversion algorithm based on global optimization methods. The reliability of the forward modeling and inversion code presented here is demonstrated through several applications, which range from the inference of the magnetic field vector in solar active regions to determining whether or not it is canopy-like in quiet chromospheric regions. This user-friendly diagnostic tool called ``HAZEL'' (from HAnle and ZEeman Light) is offered to the astrophysical community, with the hope that it will facilitate new advances in solar and stellar physics.

Asensio Ramos, A.; Trujillo Bueno, J.; Landi Degl'Innocenti, E.

2008-08-01

81

Oil shale, tar sand, coal research advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, October--December 1992  

SciTech Connect

Accomplishments for the past quarter are presented for the following five tasks: oil shale; tar sand; coal; advanced exploratory process technology; and jointly sponsored research. Oil shale research covers oil shale process studies. Tar sand research is on process development of Recycle Oil Pyrolysis and Extraction (ROPE) Process. Coal research covers: coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology includes: advanced process concepts;advanced mitigation concepts; and oil and gas technology. Jointly sponsored research includes: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO{sub 2} HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde Group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; characterization of petroleum residue; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process; NMR analysis of samples from the ocean drilling program; in situ treatment of manufactured gas plant contaminated soils demonstration program; and solid state NMR analysis of naturally and artificially matured kerogens.

Speight, J.G.

1992-12-31

82

Oil shale, tar sand, coal research, advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, January--March 1993  

SciTech Connect

Accomplishments for the past quarter are briefly described for the following areas of research: oil shale; tar sand; coal; advanced exploratory process technology; and jointly sponsored research. Oil shale and tar sand researches cover processing studies. Coal research includes: coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology covers: advanced process concepts; advanced mitigation concepts; and oil and gas technology. Jointly sponsored research includes: organic and inorganic hazardous waste stabilization; CROW{sup TM} field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; operation and evaluation of the CO{sub 2} HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid-state NMR analysis of Mesaverde Group, Greater Green River Basin tight gas sands; characterization of petroleum residue; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process; oil field waste cleanup using tank bottom recovery process; remote chemical sensor development; in situ treatment of manufactured gas plant contaminated soils demonstration program; solid-state NMR analysis of naturally and artificially matured kerogens; and development of an effective method for the clean-up of natural gas.

Not Available

1993-09-01

83

Fifth Joint Meeting of J-CaP and CaPSURE: advancing the global understanding of prostate cancer and its management.  

PubMed

This report summarizes the presentations and discussions that took place at the Fifth Joint Meeting of J-CaP and CaPSURE held in Tokyo, Japan, in July 2011. The J-CaP and CaPSURE Joint Initiative was established in 2007 with the objective of analyzing, reviewing, comparing and contrasting data on prostate cancer patients from Japan and the USA within the two important large-scale, longitudinal, observational databases-J-CaP and CaPSURE. Since its inception, the initiative has reviewed a wide range of topics and generated valuable data on the patterns of prostate cancer treatment and patient outcomes in the two geographical regions. The objectives of this 5th Joint Meeting were to provide an update on the current status of the J-CaP and CaPSURE databases, and also to discuss perspectives from a range of other Asian countries-Japan, China, Indonesia and Korea-on the use of androgen deprivation therapy for prostate cancer. The collaborators recognize that large databases, such as J-CaP and CaPSURE, provide valuable 'real-world' information, to complement data from clinical trials, which can help to advance the clinical management of prostate cancer patients worldwide. It is anticipated that in the near future, the Joint Initiative will expand globally to include patient registries from other countries so that best practice can be shared and regional differences in patients, treatments and outcomes can be explored. PMID:22217576

Akaza, Hideyuki; Carroll, Peter; Cooperberg, Matthew R; Hinotsu, Shiro

2012-03-01

84

PREFACE: Joint IPPP Durham/Cockcroft Institute/ICFA Workshop on Advanced QED methods for Future Accelerators  

NASA Astrophysics Data System (ADS)

The joint IPPP Durham/Cockcroft Institute/ICFA workshop on advanced QED methods for future accelerators took place at the Cockcroft Institute in early March 2009. The motivation for the workshop was the need for a detailed consideration of the physics processes associated with beam-beam effects at the interaction points of future high-energy electron-positron colliders. There is a broad consensus within the particle physics community that the next international facility for experimental high-energy physics research beyond the Large Hadron Collider at CERN should be a high-luminosity electron-positron collider working at the TeV energy scale. One important feature of such a collider will be its ability to deliver polarised beams to the interaction point and to provide accurate measurements of the polarisation state during physics collisions. The physics collisions take place in very dense charge bunches in the presence of extremely strong electromagnetic fields of field strength of order of the Schwinger critical field strength of 4.4×1013 Gauss. These intense fields lead to depolarisation processes which need to be thoroughly understood in order to reduce uncertainty in the polarisation state at collision. To that end, this workshop reviewed the formalisms for describing radiative processes and the methods of calculation in the future strong-field environments. These calculations are based on the Furry picture of organising the interaction term of the Lagrangian. The means of deriving the transition probability of the most important of the beam-beam processes - Beamsstrahlung - was reviewed. The workshop was honoured by the presentations of one of the founders, V N Baier, of the 'Operator method' - one means for performing these calculations. Other theoretical methods of performing calculations in the Furry picture, namely those due to A I Nikishov, V I Ritus et al, were reviewed and intense field quantum processes in fields of different form - namely those present in intense lasers - were also presented. Within the Furry picture the lowest order physics processes are represented by one vertex Feynman diagrams. Additionally, higher order processes in the Furry picture are thought to be important and are still not fully studied. The Advanced QED methods workshop also benefited greatly from reports on ongoing and planned experimental work on quantum processes in intense external fields. Some of the experiments reviewed were the NA43 and NA63 experiments using the inter atomic fields in aligned crystals at CERN. In the past, evidence has been obtained from successful experiments using an intense laser at the SLAC experiment E144. The possibility now exists for new experiments with intense laser light with the planned XFEL at DESY and the European Extreme Light Infrastructure. For upcoming accelerator projects, computer simulations of the first order processes in the Furry Picture during the bunch-bunch collision are being performed using the programs CAIN and Guinea-Pig++. The implementation of spin dynamics in these simulation programs was reported on at the workshop. This relatively small workshop generated a very productive intermix of theoretical, experimental and computational developments covering this important field of physics. Fruitful discussions took place covering improvements to the models, estimations of the remaining theoretical uncertainties and future updates to the existing simulations. It was felt that ongoing workshops in the same field would be of benefit to all those involved. The organisers would like to express their sincere thanks to all of the attendees for their contributions, to the staff of the Cockcroft Institute for hosting the workshop, to the IPPP at Durham for providing substantial funding and administrative support, and to ICFA for their sponsorship. We would also like to thank IOP Publishing for their assistance in publishing our proceedings in the Journal of Physics: Conference Series.

Bailey, I. R.; Barber, D. P.; Chattopadhyay, S.; Hartin, A.; Heinzl, T.; Hesselbach, S.; Moortgat-Pick, G. A.

2009-11-01

85

Advanced Distributed Simulation Technology II (ADST II), BICEP (DO No. 0049) SIMEX II/DAWE.  

National Technical Information Service (NTIS)

The SIMEX II was conducted during the period 17-23 September 1997 and the Division Advanced Warfighting Experiment (DAWE) was conducted from 5-13 November 1997 at the BICEP facility at Ft. Hood, TX. The exercises were sponsored by the Directorate of Train...

1998-01-01

86

Arthroscopic management of temporomandibular joint disc perforations and associated advanced chondromalacia by discoplasty and abrasion arthroplasty: preliminary results.  

PubMed

This article describes the arthroscopic surgical treatment of disc perforations by discoplasty to mobilize the disc and reduce joint friction. Grade IV chondromalacia with exposed bone was treated by abrasion arthroplasty with the goal of resurfacing the bone with fibrocartilage. Preliminary data on the results of these procedures are presented. PMID:8040731

Quinn, J H

1994-08-01

87

FIRRE joint battlespace command and control system for manned and unmanned assets (JBC2S)  

Microsoft Academic Search

The Family of Integrated Rapid Response Equipment (FIRRE) is an advanced technology demonstration program intended to develop a family of affordable, scalable, modular, and logistically supportable unmanned systems to meet urgent operational force-protection needs and requirements worldwide. The near-term goal is to provide the best available unmanned ground systems to the warfighter in Iraq and Afghanistan. The overarching long-term goal

T. A. Kramer; R. T. Laird; M. Dinh; C. M. Barngrover; J. R. Cruickshanks; G. A. Gilbreath

2006-01-01

88

FIRRE Joint Battlespace Command and Control System for Manned and Unmanned Assets (JBC2S)  

Microsoft Academic Search

ABSTRACT The Family of Integrated Rapid Response Equipment ,(FIRRE) is an ,advanced ,technology ,demonstration ,program intended to develop a family of affordable, scalable, modular, and logistically supportable unmanned systems to meet urgent operational force-protection needs ,and requirements ,worldwide. The near-term goal is to ,provide the best available unmanned ,ground systems to the warfighter in Iraq and Afghanistan. The overarching long-term

T. a. Kramer; R. t. Laird; M. Dinh; C. m. Barngrover; J. r. Cruickshanks; G. a. Gilbreath

89

Oil shale, tar sand, coal research, advanced exploratory process technology, jointly sponsored research. Quarterly technical progress report, April--June 1993  

SciTech Connect

Progress made in five areas of research is described briefly. The subtask in oil shale research is on oil shale process studies. For tar sand the subtask reported is on process development. Coal research includes the following subtasks: Coal combustion; integrated coal processing concepts; and solid waste management. Advanced exploratory process technology includes the following: Advanced process concepts; advanced mitigation concepts; oil and gas technology. Jointly sponsored research includes: Organic and inorganic hazardous waste stabilization; CROW{sup TM} field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; operation and evaluation of the CO{sup 2} HUFF-N-PUFF Process; fly ash binder for unsurfaced road aggregates; solid-state NMR analysis of Mesaverde Group, Greater Green River Basin, tight gas sands; characterization of petroleum residua; shallow oil production using horizontal wells with enhanced oil recovery techniques; surface process study for oil recovery using a thermal extraction process;NMR analysis of samples from the ocean drilling program; oil field waste cleanup using tank bottom recovery process; remote chemical sensor development; in situ treatment of manufactured gas plant contaminated soils demonstration program; solid-state NMR analysis of Mowry formation shale from different sedimentary basins; solid-state NMR analysis of naturally and artificially matured kerogens; and development of effective method for the clean-up of natural gas.

Not Available

1993-09-01

90

[Implementation of the program of "Collaborative Development of Advanced Practical Education to Train Pharmacists in Leadership" under the joint operation of the pharmaceutical departments in fourteen national universities].  

PubMed

"Collaborative Development of Advanced Practical Education Program to Train Pharmacists with Leadership" applied jointly by the pharmaceutical departments of fourteen national universities was selected to receive the special expenditure support of Ministry of Education, Culture, Sports, Science and Technology for fiscal year 2010 under "the Training of Highly Skillful Professionals and Improvement of the Quality of the Function of Professional Education". This project is to promote the collaborative development of the educational program which will make it possible to further advance and substantiate the education of pharmacists in the six year course of the pharmaceutical department for the ultimate purpose to introduce pharmacists with leadership who can play an active role and fill in a leadership position in a wide range of responsibilities into the society which, more and more, has come to expect pharmacy to take the initiative in acting against health hazards caused by infections, foods and environmental pollution as well as to meet the diversification of healthcare. To be more specific, this project is to try and evaluate the following programs repeatedly based on the plan-do-check-act (PDCA) cycle: 1) Practical medical and pharmaceutical education program; 2) Program concerning research on long term themes and advanced education; 3) Program concerning training and education of SPs (standardized patients or simulated patients) and PBL (problem-based learning) tutorial education; and 4) Program concerning the method of evaluation of education. Through this repeated trial and evaluation, this project ultimately seeks to construct a highly effective practical educational program which integrates each university's achievements and educational attempts rich in originality. PMID:22382840

Hirata, Kazumasa; Tamura, Satoru; Kobayashi, Motomasa

2012-01-01

91

ADVANCED BIOMASS REBURNING FOR HIGH EFFICIENCY NOx CONTROL AND BIOMASS REBURNING - MODELING/ENGINEERING STUDIES JOINT FINAL REPORT  

SciTech Connect

This report presents results of studies under a Phase II SBIR program funded by the U. S. Department of Agriculture, and a closely coordinated project sponsored by the DOE National Energy Technology Laboratory (NETL, formerly FETC). The overall Phase II objective of the SBIR project is to experimentally optimize the biomass reburning technologies and conduct engineering design studies needed for process demonstration at full scale. The DOE project addresses supporting issues for the process design including modeling activities, economic studies of biomass handling, and experimental evaluation of slagging and fouling. The performance of biomass has been examined in a 300 kW (1 x 10{sup 6} Btu/hr) Boiler Simulator Facility under different experimental conditions. Fuels under investigation include furniture waste, willow wood and walnut shells. Tests showed that furniture pellets and walnut shells provided similar NO{sub x} control as that of natural gas in basic reburning at low heat inputs. Maximum NO{sub x} reduction achieved with walnut shell and furniture pellets was 65% and 58% respectively. Willow wood provided a maximum NO{sub x} reduction of 50% and was no better than natural gas at any condition tested. The efficiency of biomass increases when N-agent is injected into reburning and/or burnout zones, or along with OFA (Advanced Reburning). Co-injection of Na{sub 2}CO{sub 3} with N-agent further increases efficiency of NO{sub x} reduction. Maximum NO{sub x} reduction achieved with furniture pellets and willow wood in Advanced Reburning was 83% and 78% respectively. All combustion experiments of the Phase II project have been completed. All objectives of the experimental tasks were successfully met. The kinetic model of biomass reburning has been developed. Model agrees with experimental data for a wide range of initial conditions and thus correctly represents main features of the reburning process. Modeling suggests that the most important factors that provide high efficiency of biomass in reburning are low fuel-N content and high content of alkali metals in ash. These results indicate that the efficiency of biomass as a reburning fuel may be predicted based on its ultimate, proximate, and ash analyses. The results of experimental and kinetic modeling studies were utilized in applying a validated methodology for reburning system design to biomass reburning in a typical coal-fired boiler. Based on the trends in biomass reburning performance and the characteristics of the boiler under study, a preliminary process design for biomass reburning was developed. Physical flow models were applied to specific injection parameters and operating scenarios, to assess the mixing performance of reburning fuel and overfire air jets which is of paramount importance in achieving target NO{sub x} control performance. The two preliminary cases studied showed potential as candidate reburning designs, and demonstrated that similar mixing performance could be achieved in operation with different quantities of reburning fuel. Based upon this preliminary evaluation, EER has determined that reburning and advanced reburning technologies can be successfully applied using biomass. Pilot-scale studies on biomass reburning conducted by EER have indicated that biomass is an excellent reburning fuel. This generic design study provides a template approach for future demonstrations in specific installations.

Vladimir M. Zamansky; Mark S. Sheldon; Vitali V. Lissianski; Peter M. Maly; David K. Moyeda; Antonio Marquez; W. Randall Seeker

2000-10-01

92

Research investigations in oil shale, tar sand, coal research, advanced exploratory process technology, and advanced fuels research: Volume 2 -- Jointly sponsored research program. Final report, October 1986--September 1993  

SciTech Connect

Numerous studies have been conducted in five principal areas: oil shale, tar sand, underground coal gasification, advanced process technology, and advanced fuels research. In subsequent years, underground coal gasification was broadened to be coal research, under which several research activities were conducted that related to coal processing. The most significant change occurred in 1989 when the agreement was redefined as a Base Program and a Jointly Sponsored Research Program (JSRP). Investigations were conducted under the Base Program to determine the physical and chemical properties of materials suitable for conversion to liquid and gaseous fuels, to test and evaluate processes and innovative concepts for such conversions, to monitor and determine environmental impacts related to development of commercial-sized operations, and to evaluate methods for mitigation of potential environmental impacts. This report is divided into two volumes: Volume 1 consists of 28 summaries that describe the principal research efforts conducted under the Base Program in five topic areas. Volume 2 describes tasks performed within the JSRP. Research conducted under this agreement has resulted in technology transfer of a variety of energy-related research information. A listing of related publications and presentations is given at the end of each research topic summary. More specific and detailed information is provided in the topical reports referenced in the related publications listings.

Smith, V.E.

1994-09-01

93

A joint numerical and experimental study of the jet of an aircraft engine installation with advanced techniques  

NASA Astrophysics Data System (ADS)

This paper describes the results obtained during the European Union JEDI (JEt Development Investigations) project carried out in cooperation between ONERA and Airbus. The aim of these studies was first to acquire a complete database of a modern-type engine jet installation set under a wall-to-wall swept wing in various transonic flow conditions. Interactions between the engine jet, the pylon, and the wing were studied thanks to ¤advanced¥ measurement techniques. In parallel, accurate Reynolds-averaged Navier Stokes (RANS) simulations were carried out from simple ones with the Spalart Allmaras model to more complex ones like the DRSM-SSG (Differential Reynolds Stress Modef of Speziale Sarkar Gatski) turbulence model. In the end, Zonal-Detached Eddy Simulations (Z-DES) were also performed to compare different simulation techniques. All numerical results are accurately validated thanks to the experimental database acquired in parallel. This complete and complex study of modern civil aircraft engine installation allowed many upgrades in understanding and simulation methods to be obtained. Furthermore, a setup for engine jet installation studies has been validated for possible future works in the S3Ch transonic research wind-tunnel. The main conclusions are summed up in this paper.

Brunet, V.; Molton, P.; Bézard, H.; Deck, S.; Jacquin, L.

2012-01-01

94

DESIGN AND RETROFITTING STRATEGY OF REINFORCED CONCRETE BEAM-COLUMN JOINTS Course Notes on Recent Advances in Seismic Design of RC Buildings in Taiwan  

Microsoft Academic Search

SUMMARY A simplified strut-and-tie model has previously been developed for determining the shear strength of beam-column joints. Based on the existing model, a proposal for designing the shear strength of beam-column joints to resist earthquake is made in this paper. The associated retrofitting strategy of the existing beam-column joints of the low-rise buildings is also suggested. The design approach proposed

S. J. HWANG; H. J. LEE

95

Joints in a Cornstarch Analog  

NSDL National Science Digital Library

Joints are very important to problems in applied geology (fluid flow, slope stability), but three-dimensional exposures of simple joint sets are not readily accessible from my campus. I developed this exercise based on the experiments of Miller (2001) to give students hands-on practice describing and interpreting joints. For the exercise, I prepare a cornstarch-water mixture a few days in advance and pour it into plastic petri dishes. I add a "flaw" to each dish (typically a small pebble). As the cornstarch dries, vertical joints develop. In class, each group of 3-4 students is provided a petri dish of desiccated cornstarch. Students are asked to draw a map of the joints, paying particular attention to intersection angles. (The joints curve to intersect at 90 degrees.) They determine relative ages of the joints using abutting relationships. (Typically 3-6 generations of joints.) Students next dissect the sample and describe the surface textures of the larger joints and the location of the flaw. The cornstarch produces beautiful plumose structure (hackles). Students then interpret the joint propagation direction from the surface textures, and note the origin of the joint. (Typically, a first- or second-generation joint initiates at the flaw.) Students discuss the role of flaws in the initiation of joints in their groups.

Crider, Juliet

96

Rotary Joints With Electrical Connections  

NASA Technical Reports Server (NTRS)

Power and data transmitted on many channels. Two different rotary joints equipped with electrical connections between rotating and stationary parts. One joint transmits axial thrust and serves as interface between spinning and nonspinning parts of Galileo spacecraft. Other is scanning (limitedrotation) joint that aims scientific instruments from nonspinning part. Selected features of both useful to designers of robots, advanced production equipment, and remotely controlled instruments.

Osborn, F. W.

1986-01-01

97

Joint attention and language evolution  

Microsoft Academic Search

This study investigates how more advanced joint attentional mechanisms, rather than only shared attention between two agents and an object, can be implemented and how they influence the results of language games played by these agents. We present computer simulations with language games showing that adding constructs that mimic the three stages of joint attention identified in children's early development

Johan Kwisthout; Paul Vogt; Pim Haselager; Ton Dijkstra

2008-01-01

98

Periprosthetic Joint Infections  

PubMed Central

Implantation of joint prostheses is becoming increasingly common, especially for the hip and knee. Infection is considered to be the most devastating of prosthesis-related complications, leading to prolonged hospitalization, repeated surgical intervention, and even definitive loss of the implant. The main risk factors to periprosthetic joint infections (PJIs) are advanced age, malnutrition, obesity, diabetes mellitus, HIV infection at an advanced stage, presence of distant infectious foci, and antecedents of arthroscopy or infection in previous arthroplasty. Joint prostheses can become infected through three different routes: direct implantation, hematogenic infection, and reactivation of latent infection. Gram-positive bacteria predominate in cases of PJI, mainly Staphylococcus aureus and Staphylococcus epidermidis. PJIs present characteristic signs that can be divided into acute and chronic manifestations. The main imaging method used in diagnosing joint prosthesis infections is X-ray. Computed tomography (CT) scan may assist in distinguishing between septic and aseptic loosening. Three-phase bone scintigraphy using technetium has high sensitivity, but low specificity. Positron emission tomography using fluorodeoxyglucose (FDG-PET) presents very divergent results in the literature. Definitive diagnosis of infection should be made by isolating the microorganism through cultures on material obtained from joint fluid puncturing, surgical wound secretions, surgical debridement procedures, or sonication fluid. Success in treating PJI depends on extensive surgical debridement and adequate and effective antibiotic therapy. Treatment in two stages using a spacer is recommended for most chronic infections in arthroplasty cases. Treatment in a single procedure is appropriate in carefully selected cases.

Lima, Ana Lucia L.; Oliveira, Priscila R.; Carvalho, Vladimir C.; Saconi, Eduardo S.; Cabrita, Henrique B.; Rodrigues, Marcelo B.

2013-01-01

99

Joint Problems  

MedlinePLUS

... ankles and toes. Other types of arthritis include gout or pseudogout. Sometimes, there is a mechanical problem ... for more information on osteoarthritis, rheumatoid arthritis and gout. How Common are Joint Problems? Osteoarthritis, which affects ...

100

Structural joint damage in gout.  

PubMed

This article summarizes the structural damage that is observed in advanced gout and current understanding of the mechanisms by which this damage occurs. Interactions between monosodium urate crystals and cells within the joint are described as well as knowledge gained from imaging studies. Future research directions and potential therapeutic strategies for the prevention and treatment of joint damage in gout are also discussed. PMID:24703348

Chhana, Ashika; Dalbeth, Nicola

2014-05-01

101

Periprosthetic joint infection: Current concept  

PubMed Central

Periprosthetic joint infection (PJI) is one of the most devastating and costly complications following total joint arthroplasty (TJA). Diagnosis and management of PJI is challenging for surgeons. There is no “gold standard” for diagnosis of PJI, making distinction between septic and aseptic failures difficult. Additionally, some of the greatest difficulties and controversies involve choosing the optimal method to treat the infected joint. Currently, there is significant debate as to the ideal treatment strategy for PJI, and this has led to considerable international variation in both surgical and nonsurgical management of PJI. In this review, we will discuss diagnosis and management of PJI following TJA and highlight some recent advances in this field.

Aggarwal, Vinay K; Rasouli, Mohammad R; Parvizi, Javad

2013-01-01

102

Scientific and educational advancements across a socio-economic gradient: Experiences from a joint USA-South Africa project on water resources modeling  

NASA Astrophysics Data System (ADS)

One might be tempted to assume that joint projects between partners in developed and developing countries follow a one-way path in which scientific knowledge is passed on from developed to less developed regions of the world. However, experience shows that projects of this type are generally neither successful nor sustainable unless a strong two-way exchange can be established. We present results of a multi-year collaboration focused on establishing a water resources modeling framework for South Africa that combines local knowledge with state-of-the-art modeling strategies to improve regional decision making. The result is a modeling framework that allows for the use of diverse data sources to reduce predictive uncertainty in a data sparse environment with limited local resources. We will present scientific study results, personal experience from the interaction and a broader outlook on scientific and educational needs for hydrology in Africa.

Wagener, T.; Hughes, D.

2011-12-01

103

Jointly Sponsored Research Program  

SciTech Connect

U.S. Department of Energy (DOE) Cooperative Agreement DE-FC26-98FT40321 funded through the Office of Fossil Energy and administered at the National Energy Technology Laboratory (NETL) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy & Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying highly efficient, nonpolluting energy systems that meet the nation's requirements for clean fuels, chemicals, and electricity in the 21st century. The EERC in partnership with its nonfederal partners jointly performed 131 JSRP projects for which the total DOE cost share was $22,716,634 (38%) and the nonfederal share was $36,776,573 (62%). Summaries of these projects are presented in this report for six program areas: (1) resource characterization and waste management, (2) air quality assessment and control, (3) advanced power systems, (4) advanced fuel forms, (5) value-added coproducts, and (6) advanced materials. The work performed under this agreement addressed DOE goals for reductions in CO{sub 2} emissions through efficiency, capture, and sequestration; near-zero emissions from highly efficient coal-fired power plants; environmental control capabilities for SO{sub 2}, NO{sub x}, fine respirable particulate (PM{sub 2.5}), and mercury; alternative transportation fuels including liquid synfuels and hydrogen; and synergistic integration of fossil and renewable resources.

Everett A. Sondreal; John G. Hendrikson; Thomas A. Erickson

2009-03-31

104

Shear strengthening of beam-column joints  

Microsoft Academic Search

Shear failure of beam-column joints is identified as the principal cause of collapse of many moment-resisting frame buildings during recent earthquakes. Effective and economical rehabilitation techniques for the upgrade of the joint shear-resistance capacity in existing structures are needed. The objective of this research is to develop effective selective rehabilitation schemes for reinforced concrete beam-column joints using advanced composite materials.

Ahmed Ghobarah; A. Said

2002-01-01

105

Joint pain  

Microsoft Academic Search

Joint pain may result from traumas or repeated microtraumas, as in sports injuries. Pain in osteoarthritis starts before any\\u000a objective finding. It has been demonstrated that in the first stages of this disease, pain is due to intraosseous venous engorgement\\u000a for the earlier thickening of the cortical bone under the articular cartilage. The mechanisms of inflammatory pain are more\\u000a complex

Massimo Zoppi; Elisabetta Beneforti

1999-01-01

106

Joint Genome Institute's Automation Approach and History  

SciTech Connect

Department of Energy/Joint Genome Institute (DOE/JGI) collaborates with DOE national laboratories and community users, to advance genome science in support of the DOE missions of clean bio-energy, carbon cycling, and bioremediation.

Roberts, Simon

2006-07-05

107

Center to Advance Palliative Care  

MedlinePLUS

... Practice For Patients and Families Partner Sponsor Palliative Care Tools, Training & Technical Assistance The Center to Advance ... The Joint Commission (TJC) Advanced Certification for Palliative Care Programs Learn More Access Featured Resources DY 2012 ...

108

Space Station Rotary Joint Mechanisms.  

National Technical Information Service (NTIS)

The mechanism which will be used on the space station to position the solar arrays and radiator panels for Sun pointing and Sun avoidance is described. The unique design features will be demonstrated on advanced development models of two of the joints bei...

G. W. Driskill

1986-01-01

109

Space station rotary joint mechanisms  

NASA Technical Reports Server (NTRS)

The mechanism which will be used on the space station to position the solar arrays and radiator panels for Sun pointing and Sun avoidance is described. The unique design features will be demonstrated on advanced development models of two of the joints being fabricated under contract to NASA-MSFC.

Driskill, Glen W.

1986-01-01

110

Advances in numerical simulation of turbulent flows; Proceedings of the Symposium, ASME and JSME Joint Fluids Engineering Conference, 1st, Portland, OR, June 23-27, 1991  

NASA Astrophysics Data System (ADS)

The present conference discusses the modeling of swirling flows with advanced turbulence closures, algebraic expressions for Reynolds stresses, numerical simulation of 3D developing turbulent flows in a square duct with the anisotropic k-epsilon model, the prediction of normal Reynolds stresses with the nonlinear k-epsilon model, combustor flowfield turbulence modeling with the nonlinear k-epsilon model, and the large-eddy simulation of the unsteady turbulent wake of a circular cylinder using FEM. Also discussed are the direct simulation of transient turbulent flows using the generalized method of lines, simulation of 3D shear flows around a nozzle-afterbody, the interface oscillation phenomenon over a cavity in airflow, combustion-wave instabilities in turbulent flows, and modeling the buoyancy-production of dissipation in a plane turbulent plume.

Celik, I.; Kobayashi, T.; Ghia, K. N.; Kurokawa, J.

111

Applications of advanced display technology for dismounted combatants (Invited Paper)  

NASA Astrophysics Data System (ADS)

Current military activity has made great use of small Special Tactics / Special Forces teams operating on the ground in forward areas of battle, directing Battlefield Air Operations (BAO), which include close air support, air traffic control management, and target identification and designation. A recent National Priority has been identified to improve the BAO Kit used by these Special Tactics Groups to reduce errors that may lead to unintended ground casualties. The primary objectives of the upgraded BAO Kit are to 1) improve the range and accuracy of target information; 2) eliminate opportunities for error in weapon delivery; 3) link target coordinate information directly into the weapons computer; and 4) reduce the weight carried by the warfighter by 50%. For these warfighters, L-3 Communications Display Systems and its technology partner, Universal Display Corporation, are utilizing advanced OLED display technology to create a powerful flexible display-based communication device. This will reduce the weight carried by the fighter by combining functions of the present computer, GPS equipment, and radio gear carried into the forward areas of battle. This will give the soldier a larger, higher resolution, increased battery life, and much lighter capability for the viewing of tactical information such as battlefield maps, GIS imaging data, command/control plots, and GPS-assisted navigational maps. Further integration of the device with voice and video messaging options will be explored. Both hand-held roll-up devices and wrist-worn devices are envisioned for the final product.

Huffman, David C.

2005-05-01

112

Serum levels of soluble receptor for advanced glycation end products and of S100 proteins are associated with inflammatory, autoantibody, and classical risk markers of joint and vascular damage in rheumatoid arthritis  

PubMed Central

Introduction The receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin superfamily of cell surface receptor molecules. High concentrations of three of its putative proinflammatory ligands, S100A8/A9 complex (calprotectin), S100A8, and S100A12, are found in rheumatoid arthritis (RA) serum and synovial fluid. In contrast, soluble RAGE (sRAGE) may prevent proinflammatory effects by acting as a decoy. This study evaluated the serum levels of S100A9, S100A8, S100A12 and sRAGE in RA patients, to determine their relationship to inflammation and joint and vascular damage. Methods Serum sRAGE, S100A9, S100A8 and S100A12 levels from 138 patients with established RA and 44 healthy controls were measured by ELISA and compared by unpaired t test. In RA patients, associations with disease activity and severity variables were analyzed by simple and multiple linear regressions. Results Serum S100A9, S100A8 and S100A12 levels were correlated in RA patients. S100A9 levels were associated with body mass index (BMI), and with serum levels of S100A8 and S100A12. S100A8 levels were associated with serum levels of S100A9, presence of anti-citrullinated peptide antibodies (ACPA), and rheumatoid factor (RF). S100A12 levels were associated with presence of ACPA, history of diabetes, and serum S100A9 levels. sRAGE levels were negatively associated with serum levels of C-reactive protein (CRP) and high-density lipoprotein (HDL), history of vasculitis, and the presence of the RAGE 82Ser polymorphism. Conclusions sRAGE and S100 proteins were associated not just with RA inflammation and autoantibody production, but also with classical vascular risk factors for end-organ damage. Consistent with its role as a RAGE decoy molecule, sRAGE had the opposite effects to S100 proteins in that S100 proteins were associated with autoantibodies and vascular risk, whereas sRAGE was associated with protection against joint and vascular damage. These data suggest that RAGE activity influences co-development of joint and vascular disease in rheumatoid arthritis patients.

Chen, Yueh-Sheng; Yan, Weixing; Geczy, Carolyn L; Brown, Matthew A; Thomas, Ranjeny

2009-01-01

113

Bayesian Variable Selection with Joint Modeling of Categorical and Survival Outcomes: An Application to Individualizing Chemotherapy Treatment in Advanced Colorectal Cancer  

PubMed Central

Summary Colorectal cancer is the second leading cause of cancer related deaths in the United States, with more than 130,000 new cases of colorectal cancer diagnosed each year. Clinical studies have shown that genetic alterations lead to different responses to the same treatment, despite the morphologic similarities of tumors. A molecular test prior to treatment could help in determining an optimal treatment for a patient with regard to both toxicity and efficacy. This article introduces a statistical method appropriate for predicting and comparing multiple endpoints given different treatment options and molecular profiles of an individual. A latent variable-based multivariate regression model with structured variance covariance matrix is considered here. The latent variables account for the correlated nature of multiple endpoints and accommodate the fact that some clinical endpoints are categorical variables and others are censored variables. The mixture normal hierarchical structure admits a natural variable selection rule. Inference was conducted using the posterior distribution sampling Markov chain Monte Carlo method. We analyzed the finite-sample properties of the proposed method using simulation studies. The application to the advanced colorectal cancer study revealed associations between multiple endpoints and particular biomarkers, demonstrating the potential of individualizing treatment based on genetic profiles.

Chen, Wei; Ghosh, Debashis; Raghunathan, Trivellore E.; Sargent, Daniel J.

2010-01-01

114

Nano-scale topography of bearing surface in advanced alumina/zirconia hip joint before and after severe exposure in water vapor environment.  

PubMed

The aim of this study was to perform a surface morphology assessment with nanometer scale resolution on femoral heads made of an advanced zirconia toughened alumina (ZTA) composite. Femoral heads were characterized to a degree of statistical accuracy in the as-received state and after exposures up to 100 h in severe vapor-moist environment. Surface screening was made using an atomic force microscope (AFM). Scanning was systematically repeated on portions of surface as large as several tens of micrometers, randomly selected on the head surface, to achieve sufficient statistical reliability without lowering the nanometer-scale spatial resolution of the roughness measurement. No significant difference was found in the recorded values of surface roughness after environmental exposure (at 134 degrees C, under 2 bar), which was always comparable to that of the as-received head. Surface roughness safely lay <10 nm after environmental exposures up to 100 h, which corresponded to an exposure time in vivo of several human lifetimes (i.e., according to an experimentally derived thermal activation energy). In addition, the roughness results were significantly (about one order of magnitude) lower as compared to those recorded on femoral heads made of monolithic zirconia tested under the same conditions. PMID:20058275

Pezzotti, Giuseppe; Saito, Takuma; Padeletti, Giuseppina; Cossari, Pierluigi; Yamamoto, Kengo

2010-06-01

115

Jointness: A Selected Bibliography.  

National Technical Information Service (NTIS)

JDEIS is the Joint Doctrine, Education and Training Community Electronic Information System. It encompasses a searchable Joint Doctrine Database, a Joint Education section that includes the JPME Prospective Research Topics Database, as well as award-winni...

L. Garder

2010-01-01

116

Arthritis: Metacarpophalangeal (MP) Joint  

MedlinePLUS

... Z Hand Anatomy Find a Hand Surgeon Arthritis - MP Joint Email to a friend * required fields From * ... drift (See Figure 2). When arthritis affects the MP joints, the condition is called MP joint arthritis. ...

117

Spacesuit mobility joints  

NASA Technical Reports Server (NTRS)

Joints for use in interconnecting adjacent segments of an hermetically sealed spacesuit which have low torques, low leakage and a high degree of reliability are described. Each of the joints is a special purpose joint characterized by substantially constant volume and low torque characteristics. Linkages which restrain the joint from longitudinal distension and a flexible, substantially impermeable diaphragm of tubular configuration spanning the distance between pivotally supported annuli are featured. The diaphragms of selected joints include rolling convolutions for balancing the joints, while various joints include wedge-shaped sections which enhance the range of motion for the joints.

Vykukal, H. C. (inventor)

1978-01-01

118

[Vascularized joint transfer for finger joint reconstruction].  

PubMed

In a retrospective clinical study 16 vascularized joint transfers to the hand with an average follow-up of 8.2 (3 - 15) years were evaluated. The finger joint defect was caused by trauma in 12 patients, tumour in 2 patients and infection and congenital deformity in 1 patient each. There were 14 men and 2 women. The mean age range was 26 (2 - 42) years. In 6 cases a partial vascularized joint transfer was carried out, with the transplant being harvested in two cases from non-replantable finger according to the "tissue bank concept" according to Chase and in the other two cases from the PIP-joint of the second toe. In 10 patients a complete vascularized joint transfer was carried out, with the joint being harvested from the hand in 6 cases and from the 2nd toe in 4 cases. The following criteria were evaluated: active range of motion (neutral-0-method), postoperative arthritis, growth and complications. Active range of motion of the transplanted joint was for partial PIP-joint transfer Ex/Flex 0/20/65 degrees und for partial MP-joint transfer 0/20/30 degrees . After DIP-to-PIP-joint transposition active range of motion was measured Ex/Flex 0/20/60 degrees , after PIP-to-PIP transposition 0/30/60 degrees , PIP-to-MP-transposition 0/20/80 degrees and after MP-to-MP-transposition 0/20/57 degrees . The results after microvascular PIP-joint transfer from the 2nd toe for PIP-joint reconstruction were 0/25/58 degrees for PIP-joint reconstruction and 0/15/70 degrees for MP-joint reconstruction. Arthritic changes could be seen in 3 out of 4 patients with partial vascularized joint transfer. In all complete joint transfers there was no clinical and radiological evidence of arthritis even after 15 years. In the two skeletal immature patients at the time of transfer, normal growth compared to the contralateral donor site could be seen. In 8 out of 14 patients complications occurred. In 4 cases tendolysis of the extensor tendon was necessary. In 4 patients skeletal malalignment (3 x sagittal plane, 1 x rotation) was diagnosed. In one patient flexor pulley reconstruction was necessary in order to correct a bowstring deformity. Indications for vascularized joint transfer at the finger in children is set because of lack of therapy option offering normal growth potential. In adults vascularized joint transfer is indicated in case of contraindication for prosthetic joint replacement or arthrodesis. PMID:17724645

Hierner, R; Berger, A K; Shen, Z-L

2007-08-01

119

Proprioception and joint stability  

Microsoft Academic Search

In the present paper the current clinical knowledge about proprioception is given for the shoulder, knee, ankle, elbow and the radiocarpal joint. Proprioceptive capabilities are decreased after joint injuries such as ACL or meniscus tears, shoulder dislocation, ankle sprain and in joints with degenerative joint disease. Some surgical procedures seem to restore the proprioceptive abilities; others do not. Elastic knee

J. Jerosch; M. Prymka

1996-01-01

120

Advanced thermionic energy conversion: Joint highlights  

NASA Technical Reports Server (NTRS)

A theoretical model was used to study the effects of structured electrodes on converter I-V characteristics and results are given. An auxiliary-ion-source triode operated as a plasmatron was used for studying the enhancement distribution and magnetic effects, and results are reported. Design features of the high current-zero power (ZEPO) converter tests are given.

1976-01-01

121

Modified joint probabilistic data association with classification-aided for multitarget tracking * * This project was supported by Defense Advanced Research Project “the Techniques of Information Integrated Processing and Fusion” in the Eleventh Five-Year Plan (513060302)  

Microsoft Academic Search

Joint probabilistic data association is an effective method for tracking multiple targets in clutter, but only the target kinematic information is used in measure-to-track association. If the kinematic likelihoods are similar for different closely spaced targets, there is ambiguity in using the kinematic information alone; the correct association probability will decrease in conventional joint probabilistic data association algorithm and track

Ba Hongxin; Cao Lei; He Xinyi; Cheng Qun

2008-01-01

122

[Total joint arthroplasty].  

PubMed

Control of the disease activity is enabled due to the progress of drug therapy for rheumatoid arthritis. However, surgical treatments are necessary for unresponsive cases to the drug or for achieving higher QOL, and we can attain more tight control or cure by combination of drug therapy and surgical treatments. Total joint arthroplasty provides indolence, mobility, stability and is an useful joint reconstruction method. Shoulder and elbow joint work as a reach function together, and total joint arthroplasty become adaptation when extensive joint destruction or severe pain occurrs. With the usage of biologic agents joint repair is possible in small joints, but if the joint destruction progress in weight-bearing joints, repair is impossible and total joint arthroplasty can be required. PMID:23961679

Mibe, Junya; Yamamoto, Kengo

2013-07-01

123

15 CFR 295.23 - Dissolution of joint research and development ventures.  

Code of Federal Regulations, 2010 CFR

...TECHNOLOGY, DEPARTMENT OF COMMERCE NIST EXTRAMURAL PROGRAMS ADVANCED TECHNOLOGY PROGRAM Assistance to United States Industry-Led Joint Research and Development Ventures § 295.23 Dissolution of joint research and development ventures. Upon...

2011-01-01

124

15 CFR 295.23 - Dissolution of joint research and development ventures.  

Code of Federal Regulations, 2010 CFR

...TECHNOLOGY, DEPARTMENT OF COMMERCE NIST EXTRAMURAL PROGRAMS ADVANCED TECHNOLOGY PROGRAM Assistance to United States Industry-Led Joint Research and Development Ventures § 295.23 Dissolution of joint research and development ventures. Upon...

2009-01-01

125

15 CFR 295.23 - Dissolution of joint research and development ventures.  

Code of Federal Regulations, 2010 CFR

...TECHNOLOGY, DEPARTMENT OF COMMERCE NIST EXTRAMURAL PROGRAMS ADVANCED TECHNOLOGY PROGRAM Assistance to United States Industry-Led Joint Research and Development Ventures § 295.23 Dissolution of joint research and development ventures. Upon...

2010-01-01

126

Anesthesia for joint replacement surgery: Issues with coexisting diseases  

PubMed Central

The first joint replacement surgery was performed in 1919. Since then, joint replacement surgery has undergone tremendous development in terms of surgical technique and anesthetic management. In this era of nuclear family and independent survival, physical mobility is of paramount importance. In recent years, with an increase in life expectancy, advances in geriatric medicine and better insurance coverage, the scenario of joint replacement surgery has changed significantly. Increasing number of young patients are undergoing joint replacement for pathologies like rheumatoid arthritis and ankylosing spondylitis. The diverse pathologies and wide range of patient population brings unique challenges for the anesthesiologist. This article deals with anesthetic issues in joint replacement surgery in patients with comorbidities.

Kakar, P N; Roy, Preety Mittal; Pant, Vijaya; Das, Jyotirmoy

2011-01-01

127

Butt Joint Tool Commissioning  

SciTech Connect

ITER Central Solenoid uses butt joints for connecting the pancakes in the CS module. The principles of the butt joining of the CICC were developed by the JAPT during CSMC project. The difference between the CSMC butt joint and the CS butt joint is that the CS butt joint is an in-line joint, while the CSMC is a double joint through a hairpin jumper. The CS butt joint has to carry the hoop load. The straight length of the joint is only 320 mm, and the vacuum chamber around the joint has to have a split in the clamp shell. These requirements are challenging. Fig.1 presents a CSMC joint, and Fig.2 shows a CS butt joint. The butt joint procedure was verified and demonstrated. The tool is capable of achieving all specified parameters. The vacuum in the end was a little higher than the target, which is not critical and readily correctable. We consider, tentatively that the procedure is established. Unexpectedly, we discover significant temperature nonuniformity in the joint cross section, which is not formally a violation of the specs, but is a point of concern. All testing parameters are recorded for QA purposes. We plan to modify the butt joining tool to improve its convenience of operation and provide all features necessary for production of butt joints by qualified personnel.

Martovetsky, N N

2007-12-06

128

Heberden oration 1985. The rheology of joints.  

PubMed

The value of rheological studies of joint tissues has been illustrated by studies from our department. These have included studies of the stiffness of joints which suggest that subjective stiffness is more likely to be related to limitation of movement of a joint than to increased physical stiffness (either elastic or dissipative torques). A review of goniometry suggests that the diminution of joint movement with advancing age varies with the frequency of use of the joint. A simple goniometer for the hip has been described, and in contrast a sophisticated telemeterized system has been devised. Instruments to measure passive movement of joints, and their application for hypermobility, have been discussed. A knee analyser has been constructed to measure ligamentous and meniscal damage. Ligament replacement has been successfully achieved in the pig and in man by using a woven polyester tube. The load-bearing function of the menisci has been clearly demonstrated, explaining the relationship found in studies of parachutists and physical-education teachers between meniscectomy and osteoarthrosis of the knee. Support for the Leeds biomechanical hypothesis for the development of osteoarthrosis has been described from rheological studies of cartilage at the patellofemoral joint and at the ankle. The intervertebral joint does not appear to be a shock absorber in compression. The spine must bend to function in this way. The relevance to rigid segments of the spondylitic spine and surgical fusion of vertebrae is discussed. PMID:3730734

Wright, V

1986-08-01

129

Pressure suit joint analyzer  

NASA Technical Reports Server (NTRS)

A measurement system for simultaneously measuring torque and angular flexure in a pressure suit joint is described. One end of a joint under test is held rigid. A torque transducer is pivotably supported on the other movable end of a joint. A potentiometer is attached to the transducer by an arm. The wiper shaft of the potentiometer is gripped by a reference arm that rotates the wiper shaft the same angle as the flexure of joint. A signal is generated by the potentiometer which is representative of the joint flexure. A compensation circuit converts the output of the transducer to a signal representative of joint torque.

Vykukal, H. C.; Webbon, B. W. (inventors)

1982-01-01

130

Adhesive joint and composites modeling in SIERRA.  

SciTech Connect

Polymers and fiber-reinforced polymer matrix composites play an important role in many Defense Program applications. Recently an advanced nonlinear viscoelastic model for polymers has been developed and incorporated into ADAGIO, Sandia's SIERRA-based quasi-static analysis code. Standard linear elastic shell and continuum models for fiber-reinforced polymer-matrix composites have also been added to ADAGIO. This report details the use of these models for advanced adhesive joint and composites simulations carried out as part of an Advanced Simulation and Computing Advanced Deployment (ASC AD) project. More specifically, the thermo-mechanical response of an adhesive joint when loaded during repeated thermal cycling is simulated, the response of some composite rings under internal pressurization is calculated, and the performance of a composite container subjected to internal pressurization, thermal loading, and distributed mechanical loading is determined. Finally, general comparisons between the continuum and shell element approaches for modeling composites using ADAGIO are given.

Ohashi, Yuki; Brown, Arthur A.; Hammerand, Daniel Carl; Adolf, Douglas Brian; Chambers, Robert S.; Foulk, James W., III (.,; )

2005-11-01

131

Jointness A Selected Bibliography.  

National Technical Information Service (NTIS)

To assist researchers in a better understanding of how the United States armed services work together, the U.S. Army War College Library presents Jointness: A Selected Bibliography. A revised and updated version of our earlier bibliographies on jointness,...

2000-01-01

132

Large displacement spherical joint  

DOEpatents

A new class of spherical joints has a very large accessible full cone angle, a property which is beneficial for a wide range of applications. Despite the large cone angles, these joints move freely without singularities.

Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

2002-01-01

133

Joints and Movements.  

National Technical Information Service (NTIS)

The report contains an explanation of anatomical concepts of joints and movements necessary in biomedical and physical therapy education. Upon completion of pamphlet, reader will be able to: (1) identify movements at any joint in the human body, (2) diffe...

P. Jacoby-Lockhart H. B. Slotnick

1979-01-01

134

North American Joint Positive Train Control (NAJPTC) Project. Research Results.  

National Technical Information Service (NTIS)

The North American Joint Positive Train Control (NAJPTC), was an ambitious project to develop, test, and demonstrate PTC capabilities, including flexible block operations, interoperability, and advance activation of highway grade crossing devices, in a co...

2009-01-01

135

Air-to-Air Missile Testing Using Advanced Distributed Simulation.  

National Technical Information Service (NTIS)

The Joint Advanced Distributed Simulation Joint Test and Evaluation (JADS JT&E) was chartered by the Deputy Director, Test, Systems Engineering and Evaluation (Test and Evaluation), Office of the Under Secretary of Defense (Acquisition and Technology) in ...

L. McKee

1996-01-01

136

HDFx: a novel biologic immunomodulator is therapeutically -effective in hemorrhagic and intestinal-ischemic shock: importance of microcirculatory-immunological interactions and their potential implications for the warfighter and disaster victims  

PubMed Central

Recently, we have reported on the discovery of a new, conserved protein (35-40 kD), termed HDFx, that protects rats, guinea-pigs, mice and rabbits against lethal hemorrhage, endotoxins, and traumatic injury when given, systemically, as a pretreatment. HDFx was also found to stimulate several arms of the immune system. The present report demonstrates, for the first time, that HDFx ,when administered post-hemorrhage and post-intestinal ischemia shock -trauma, yields increased survival rates, elevates falling arterial blood pressures, possesses unique actions in the microvasculature, stimulates depressed RES phagocytosis (normally observed in animals and humans during blood loss, sepsis and trauma), and preserves cytokine levels in lymphocytes obtained from animals subjected to hemorrhage and traumatic shock. We believe that HDFx presents a potential brand new therapeutic approach:1)for the injured warfighter on the battlefield, 2)for victims of major disasters, 3)as an adjunct for patients undergoing high -risk surgical procedures commonly found in open-heart surgery, cancers, and in neurosurgeries. Use of HDFx could potentially allow oncologists to decrease chemotherapy dosing, while increasing patient survival chances.

Altura, Burton M; Carella, Anthony; Gebrewold, Asefa

2011-01-01

137

Active rigidity joint  

NASA Astrophysics Data System (ADS)

Unimorph active rigidity joints, constructed from Shape Memory Alloy and Shape Memory Polymer and capable of bending actuation, are reported in this work. An embedded aluminum shim was added to each joint as a structural element to facilitate actuation. Joints were actuated using ohmic Tri-Phase and pulse heating processes with different results. It appeared that openloop position control could be achieved using pulse heating. Actuator improvements and future experiments are proposed.

Geeng, Franklin; Manzo, Justin; Garcia, Ephrahim

2010-03-01

138

Army Communicator. Volume 33, Number 3, Summer 2008. WIN-T: Increasing the Power of Battlefield Communications.  

National Technical Information Service (NTIS)

Contents: WIN-T enabling battle command for the Joint Warfighter through total system Life Cycle Management by MG Dennis L. Via; Advancing the Army through an innovative process by BG Nick Justice; WIN-T Information = combat power magnifies effects by COL...

2008-01-01

139

Annual Joint Report on Pre-Kindergarten through Higher Education in Tennessee, 2009  

ERIC Educational Resources Information Center

This 2009 Annual Joint Report of the State Board of Education and the Tennessee Higher Education Commission identifies four joint priorities and nine associated goals addressing areas of need in both student learning and educator development for the advancement of education in Tennessee. The joint priorities and initiatives focus on points of…

Tennessee State Board of Education, 2009

2009-01-01

140

Advancement's Steady Advance.  

ERIC Educational Resources Information Center

The 1995 CASE (Council for Advancement and Support of Education) Survey of Institutional Advancement, responded to by 969 advancement professionals at institutions of higher education, examined demographics (sex ratio, minority members); professional backgrounds; job satisfaction; salaries (now averaging $53,000); salary disparities; and the…

Williams, Roger L.

1996-01-01

141

Tape Joint Stiffness.  

National Technical Information Service (NTIS)

This redport evaluates the stiffness for a standard tape-joint structural connection. This stiffness is frequently necessary when modeling a structure (e.g., a shock model). In general, for a standard cylindrical tape joint, the stiffness is 1.2 times gre...

R. P. Rechard

1986-01-01

142

Behavior of jointed pipelines  

Microsoft Academic Search

Experimental data on the axial, bending and torsional behavior of ductile cast iron pipes with rubber gasket joints is presented. Analytical expressions are provided which predict the resistance mechanisms and behavior of the joints. The bending mechanism is found to be quite different from the axial and torsional mechanism. By repeating the tests in a specially designed soil box, the

Singhal

1984-01-01

143

Investigation of joint disease  

Microsoft Academic Search

The role of nuclear medicine in the diagnosis and management of the major arthropathies is critically reviewed, with particular reference to osteoarthritis, rheumatoid and similar forms of arthritis, ankylosing spondylitis, non-specific back pain, gout, the neuropathic joint, avascular necrosis, infection and the consequences of prosthetic joint insertion. Attention is drawn both to practical applications and deficiencies in current techniques and

M. V. Merrick

1992-01-01

144

Bone and joint infections  

Microsoft Academic Search

Infections involving bone and joint are a significant cause of morbidity and mortality. They can result in prolonged hospital stays, long courses of systemic antibiotics and frequently will require surgical intervention. In this review we will cover the commonest infections seen clinically. We have also chosen to divide the review into two sections; infections involving native tissue\\/joints and infections relating

Tom Darton; Robert Townsend

2010-01-01

145

Campylobacter prosthetic joint infection.  

PubMed

A 75-year-old man was diagnosed with probable Campylobacter jejuni prosthetic knee infection after a diarrheal illness. Joint aspirate and operative cultures were negative, but PCR of prosthesis sonicate fluid was positive, as was stool culture. Nineteen additional cases of Campylobacter prosthetic joint infection reported in the literature are reviewed. PMID:24523462

Vasoo, Shawn; Schwab, Jeramy J; Cunningham, Scott A; Robinson, Trisha J; Cass, Joseph R; Berbari, Elie F; Walker, Randall C; Osmon, Douglas R; Patel, Robin

2014-05-01

146

Prosthetic Elbow Joint.  

National Technical Information Service (NTIS)

An artificial manually positionable elbow joint for use in an upper extremity, above-elbow, prosthetic which provides a locking feature that is easily controlled by the wearer is described. The instant elbow joint is very strong and durable to withstand t...

B. Weddendorf

1992-01-01

147

Joint warfare system (JWARS)  

Microsoft Academic Search

The Joint Warfare System (JWARS) is a campaign-level model of military operations that is currently being developed under contract by the Office of the Secretary of Defense (OSD) for use by OSD, the Joint Staff, the Services, and the War fighting Commands. The behavior of military forces can be simulated from ports of embarkation through to their activities in combat.

A. Simlote

2003-01-01

148

General joint laxity  

Microsoft Academic Search

General joint laxity is measured with the hyperextensometer, and by analyzing the values obtained in a group of European subjects norm curves are drawn up related to age and sex. The values found in various orthopedic diseases are put into these curves, and the importance of general joint laxity is discussed.

L. Dubs; N. Gschwend

1988-01-01

149

Joint Seal Materials.  

National Technical Information Service (NTIS)

Three major experimental field installations of approximately 7 types of joint sealing materials were used to compare and evaluate the products of numerous sealant manufacturers. The sealants were placed in contraction joints (3/8 in. x 2 in.) which were ...

J. G. F. Hiss J. R. Lambert W. M. McCarty

1968-01-01

150

Parameter identification for joint elements in a revolute-joint detector manipulator.  

SciTech Connect

A revolute-joint robot is being developed for the spatial positioning of an x-ray detector at the Advanced Photon Source. Commercially available revolute-joint manipulators do not meet our size, positioning, or payload specifications. One idea being considered is the modification of a commercially available robot, with the goal of improving the repeatability and trajectory accuracy. Theoretical, computational, and experimental procedures are being used to (1) identify, (2) simulate the dynamics of an existing robot system using a multibody approach, and eventually (3) design an improved version, with low dynamic positioning uncertainty. A key aspect of the modeling and performance prediction is accurate stiffness and damping values for the robot joints. This paper discusses the experimental identification of the stiffness and damping parameters for one robot harmonic drive joint.

Preissner, C.; Shu, D.; Royston, T.; Experimental Facilities Division (APS); Univ. of Illinois at Chicago

2005-01-01

151

Differential Diagnosis of Pain Around the Hip Joint  

Microsoft Academic Search

The differential diagnosis of hip pain is broad and includes intra-articular pathology, extra-articular pathology, and mimickers, including the joints of the pelvic ring. With the current advancements in hip arthroscopy, more patients are being evaluated for hip pain. In recent years, our understanding of the functional anatomy around the hip has improved. In addition, because of advancements in magnetic resonance

Lisa M. Tibor; Jon K. Sekiya

2008-01-01

152

Superconducting cable joint resistance  

SciTech Connect

This paper reports on results of a parametric study of the 4.2 K resistance of lap joints between two 27-strand cables of multifilamentary Nb{sub 3}Sn wire. All joints were between ribbon terminations made rolling copper-encapsulated cable ends flat. Resistances as functions of current were inferred from current decay time constants of cable-in-conduit conductor loops connected by the joints. The resistances of twenty three samples were measured (range of 0.2 to 3 n{Omega}). It was found that lap joint resistance was a function of current. The influences of solder versus no solder, solder thickness, indium versus tin-lead, ribbon surface oxidation, solder flux, cable twist pitch, wire chrome plating, clamping pressure during heat treatment, ribbon aspect ratio, and joint length are reported.

Herbelot, O.; Steeves, M.M.; Hoening, M.O. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center)

1991-03-01

153

MISR JOINT_AS Data  

MISR Data and Information Joint Aerosol Product (JOINT_AS) The MISR Level 3 Products are ... campaigns at daily and monthly time scales. The Joint Aerosol product provides a monthly global statistical summary of MISR Level 2 ...

2014-03-24

154

Cover For Duct Expansion Joint  

NASA Technical Reports Server (NTRS)

Size and shape of cover reduces stress and increases strength. Cover for expansion joints on duct-work seals tightly while accommodating movement of joint. Provides ample bonding area on both members of joint.

Brown, A. R.

1988-01-01

155

Appendicular joint dislocations.  

PubMed

This study defines the incidence and epidemiology of joint dislocations and subluxations of the appendicular skeleton. All patients presenting acutely to hospital with a dislocation or subluxation of the appendicular skeleton from a defined population were included in the study. There were 974 dislocations or subluxations over one year between the 1st November 2008 and the 31st October 2009. There was an overall joint dislocation incidence of 157/10(5)/year (188/10(5)/year in males and 128/10(5)/year in females). Males demonstrated a bimodal distribution with a peak incidence of 446/10(5)/year at 15-24 years old and another of 349/10(5)/year in those over 90 years. Females demonstrate an increasing incidence from the seventh decade with a maximum incidence of 520/10(5)/year in those over 90 years. The most commonly affected joints are the glenohumeral (51.2/10(5)/year), the small joints of the hand (29.9/10(5)/year), the patellofemoral joint (21.6/10(5)/year), the prosthetic hip (19.0/10(5)/year), the ankle (11.5/10(5)/year), the acromioclavicular joint (8.9/10(5)/year) and the elbow (5.5/10(5)/year). Unlike fractures, dislocations are more common in the both the most affluent and the most socially deprived sections of the population. Joint disruptions are more common than previously estimated. PMID:23433660

Hindle, Paul; Davidson, Eleanor K; Biant, Leela C; Court-Brown, Charles M

2013-08-01

156

Pressure vessel flex joint  

NASA Technical Reports Server (NTRS)

An airtight, flexible joint is disclosed for the interfacing of two pressure vessels such as between the Space Station docking tunnel and the Space Shuttle Orbiter bulkhead adapter. The joint provides for flexibility while still retaining a structural link between the two vessels required due to the loading created by the internal/external pressure differential. The joint design provides for limiting the axial load carried across the joint to a specific value, a function returned in the Orbiter/Station tunnel interface. The flex joint comprises a floating structural segment which is permanently attached to one of the pressure vessels through the use of an inflatable seal. The geometric configuration of the joint causes the tension between the vessels created by the internal gas pressure to compress the inflatable seal. The inflation pressure of the seal is kept at a value above the internal/external pressure differential of the vessels in order to maintain a controlled distance between the floating segment and pressure vessel. The inflatable seal consists of either a hollow torus-shaped flexible bladder or two rolling convoluted diaphragm seals which may be reinforced by a system of straps or fabric anchored to the hard structures. The joint acts as a flexible link to allow both angular motion and lateral displacement while it still contains the internal pressure and holds the axial tension between the vessels.

Kahn, Jon B. (inventor)

1992-01-01

157

Advance Directives  

MedlinePLUS

... saved articles window. My Saved Articles » My ACS » Advance Directives Download Printable Version [PDF] » An advance health care ... to get started. Why do you need an advance directive? What is an advance directive? Types of advance ...

158

Advancements in HMD technology: the DARPA-sponsored SCENICC program  

NASA Astrophysics Data System (ADS)

In this paper we report on the technical developments of the head worn display (HWD) for DARPA's SCENICC program. The goal of the SCENICC program is to provide the warfighter with vision capabilities exceeding normal human vision. This is being achieved with an advanced imaging system that is able to capture the surrounding scene with superior visual acuity, contrast sensitivity, and wavelength sensitivity. With this increased visual information density, intelligent image processing provides imagery to the wearer's eyes via an advanced HWD. The goal of this HWD is to provide digital visual information at the limits of human perception over a field of view near the human peripheral vision limits. This represents a tremendous amount of information requiring novel concepts in order to achieve such ambitious goals. One important concept is the use of imaging optics located directly on the eye, moving with the eye as it changes its gaze angle. A second concept is the use of demagnification optics to convert a large, low spatial resolution image into a smaller, high spatial resolution image. This is done in conjunction with image processing that is constantly modifying the image presented based on real-time pupil tracking. In addition to enabling a high performance optical system, integrating the imaging optical components into contact lenses eliminates much of the bulky imaging optics from the HWD itself creating a high performance wearable display in a standard protective eyewear form factor. The resulting quantum advance in HWD performance will enable HWDs to expand well beyond their current limited roles.

Sprague, Randall; Zhang, Arthur; Cookson, Scott; Hendricks, Lee; O'Brien, Tyrone; Ford, Joseph; Tremblay, Eric; Rutherford, Todd; Reinert, Doug; Johnson, Adam

2013-05-01

159

Compliant Joints For Robots  

NASA Technical Reports Server (NTRS)

Compliant joints devised to accommodate misalignments of tools and/or workpieces with respect to robotic manipulators. Has characteristics and appearance of both universal-joint and cable-spring-type flexible shaft coupling. Compliance derived from elastic properties of short pieces of cable. Compliance of joint determined by lengths, distances between, relative orientations, thickness of strands, number of strands, material, amount of pretwist, and number of short pieces of cable. Worm-drive mechanism used to adjust lengths to vary compliance as needed during operation.

Kerley, James J., Jr.

1990-01-01

160

Wave Propagation in Jointed Geologic Media  

SciTech Connect

Predictive modeling capabilities for wave propagation in a jointed geologic media remain a modern day scientific frontier. In part this is due to a lack of comprehensive understanding of the complex physical processes associated with the transient response of geologic material, and in part it is due to numerical challenges that prohibit accurate representation of the heterogeneities that influence the material response. Constitutive models whose properties are determined from laboratory experiments on intact samples have been shown to over-predict the free field environment in large scale field experiments. Current methodologies for deriving in situ properties from laboratory measured properties are based on empirical equations derived for static geomechanical applications involving loads of lower intensity and much longer durations than those encountered in applications of interest involving wave propagation. These methodologies are not validated for dynamic applications, and they do not account for anisotropic behavior stemming from direcitonal effects associated with the orientation of joint sets in realistic geologies. Recent advances in modeling capabilities coupled with modern high performance computing platforms enable physics-based simulations of jointed geologic media with unprecedented details, offering a prospect for significant advances in the state of the art. This report provides a brief overview of these modern computational approaches, discusses their advantages and limitations, and attempts to formulate an integrated framework leading to the development of predictive modeling capabilities for wave propagation in jointed and fractured geologic materials.

Antoun, T

2009-12-17

161

Architecting Joint Command and Control System of System Capability Certifications.  

National Technical Information Service (NTIS)

Command, Control, Communications, Computers, and Intelligence (C4I) systems, each originally designed to address a single warfighting function, have been assembled into an interdependent C4I System of Systems (SoS). The C4I SoS continues to evolve, withou...

J. Acosta, J. Lamb, S. Hoesly, S. Huseth, S. Krider

2007-01-01

162

Joint Injection/Aspiration  

MedlinePLUS

... bursa or tendon sheath to treat bursitis and tendonitis, respectively. What benefit is derived from a joint ... conditions, such as rheumatoid arthritis, psoriatic arthritis, gout, tendonitis, bursitis and, occasionally, osteoarthritis. What usually is injected ...

163

Joint Contingency Contracting.  

National Technical Information Service (NTIS)

The purpose of this Master of Business Administration (MBA) Professional Report is to investigate and analyze the means by which Contingency Contracting Officers (CCO) can effectively operate in a Joint contingency environment and to validate the Defense ...

E. K. Johnson B. H. Paton E. W. Threat L. A. Haptonstall

2005-01-01

164

Joint Aspiration (Arthrocentesis)  

MedlinePLUS

... arthritis, or JRA), systemic lupus erythematosus (SLE), and Lyme disease. Joint aspiration is diagnostic but it also can ... Parents MORE ON THIS TOPIC Evaluate Your Child's Lyme Disease Risk Juvenile Idiopathic Arthritis Living With Lupus Bones, ...

165

Temporomandibular Joint, Open  

MedlinePLUS

... Dental Research Loan Repayment Programs NIH Loan Repayment Programs ... glide along the joint socket of the temporal bone. The condyles slide back to their original position when we close our mouths. To keep ...

166

Acromioclavicular Joint Separations.  

National Technical Information Service (NTIS)

Acromioclavicular (AC) joint separations are common injuries of the shoulder girdle, especially in the young and active population. Typically the mechanism of this injury is a direct force against the lateral aspect of the adducted shoulder, the magnitude...

F. Martetschlaeger P. J. Millett R. J. Warth T. R. Gaskill

2013-01-01

167

Heuristics for Joint Architecting.  

National Technical Information Service (NTIS)

There is no question that Department of Defense and chairman of the Joint Chiefs of Staff directives have increased the development of operational and systems architectures. The DoD Architectural Framework (DoDAF) and its associated governing publications...

A. Piepkorn G. J. Miller J. Kennedy R. Mills T. Wieser

2006-01-01

168

Joint fluid Gram stain  

MedlinePLUS

Gram stain of joint fluid ... result means no bacteria are present on the Gram stain. Note: Normal value ranges may vary slightly ... Abnormal results mean bacteria were seen on the Gram stain. This may be a sign of a ...

169

Arthroscopically assisted acromioclavicular joint reconstruction.  

PubMed

Arthroscopically assisted acromioclavicular joint reconstruction avoids the large incisions necessary with open reconstructions. This acromioclavicular joint reconstruction technique via the subacromial space does not violate the rotator interval or require screw removal. The patient is placed in a modified beach-chair position. The arthroscope is placed into the subacromial space, and a bursectomy is performed through a lateral subacromial portal. The coracoacromial ligament is released from the acromion with an electrocautery and an arthroscopic elevator. A nonabsorbable suture is passed through the coracoacromial ligament with a suture passer, and an arthroscopic suture grasper is used to deliver both ends of the suture out through the lateral portal. The coracoid is identified and isolated using a radiofrequency ablator placed through the anterior portal while visualizing through the lateral portal. A percutaneous shuttle device is passed through the skin superomedial to the coracoid. The shuttle is visualized entering superior to the coracoid and is passed just medial to the coracoid. Once the tip of the shuttle can be visualized in the recess inferior to the coracoid, the shuttle loop is advanced. A suture grasper is used to deliver both ends of the shuttle out through the anterior portal. A semitendinosus allograft is used to reconstruct the coracoclavicular ligament. A nonabsorbable suture is passed through both ends of the allograft. Three strands of nonabsorbable suture are braided together. The tendon and the braided suture are shuttled around the coracoid. At this point, both the braided suture and the allograft tendon enter the anterior portal, wrap around the coracoid base, and exit the anterior portal. A 3-cm incision is made over the distal clavicle. A hole is drilled through the clavicle with a 5-mm drill. A loop of 22-gauge wire is passed through the hole in the clavicle, and a looped suture is shuttled through the hole. A curved clamp is used to create a tunnel from the acromioclavicular joint, under the deltoid, to the anterior portal. The ends of the braided suture and the tendon sutures are grasped by the clamp and pulled out the acromioclavicular joint incision. The limbs of the braided suture and the tendon suture that pass medial to the coracoid are shuttled through the hole in the clavicle using the looped suture that was previously passed through the clavicle. The acromioclavicular joint is reduced by pushing down on the distal clavicle with a bone tamp while simultaneously lifting the acromion upward by superiorly loading the humerus at the elbow. Once the acromioclavicular joint is reduced or slightly over-reduced, the braided suture is tied down securely. The acromioclavicular joint should remain reduced even after the manual reduction maneuver is released. The semitendinosus allograft is tensioned around the distal end of the clavicle and sutured to itself with a nonabsorbable suture. The released coracoacromial ligament is retrieved from the clavicular incision and sutured to the distal clavicle and semitendinosus allograft. The incision is closed in standard fashion, and a sling is applied. PMID:16458813

Baumgarten, Keith M; Altchek, David W; Cordasco, Frank A

2006-02-01

170

Joint Contact Stress  

PubMed Central

A joint's normal mechanical history contributes to the maintenance of articular cartilage and underlying bone. Loading facilitates the flow of nutrients into cartilage and waste products away, and additionally provides the mechanical signals essential for normal cell and tissue maintenance. Deleteriously low or high contact stresses have been presumed to result in joint deterioration, and particular aspects of the mechanical environment may facilitate repair of damaged cartilage. For decades, investigators have explored static joint contact stresses (under some more or less arbitrary condition) as a surrogate of the relevant mechanical history. Contact stresses have been estimated in vitro in many joints and in a number of species, although only rarely in vivo. Despite a number of widely varying techniques (and spatial resolutions) to measure these contact stresses, reported ranges of static peak normal stresses are relatively similar from joint to joint across species, and in the range of 0.5 to 5.0 MPa. This suggests vertebrate diarthrodial joints have evolved to achieve similar mechanical design criteria. Available evidence also suggests some disorders of cartilage deterioration are associated with somewhat higher peak pressures ranging from 1-20 MPa, but overlapping the range of normal pressures. Some evidence and considerable logic suggests static contact stresses per se do not predict cartilage responses, but rather temporal aspects of the contact stress history. Static contact stresses may therefore not be a reasonable surrogate for biomechanical studies. Rather, temporal and spatial aspects of the loading history undoubtedly induce beneficial and deleterious biological responses. Finally, since all articular cartilage experiences similar stresses, the concept of a "weight-bearing" versus a "non-weight-bearing" joint seems flawed, and should be abandoned.

Brand, Richard A

2005-01-01

171

Prosthetic Joint Infections  

PubMed Central

Prosthetic joint infections represent a major therapeutic challenge for both healthcare providers and patients. This paper reviews the predisposing factors, pathogenesis, microbiology, diagnosis, treatment and prophylaxis of prosthetic joint infection. The most optimal management strategy should be identified based on a number of considerations including type and duration of infection, antimicrobial susceptibility of the infecting pathogen, condition of infected tissues and bone stock, patient wishes and functional status.

Aslam, Saima; Darouiche, Rabih O.

2012-01-01

172

High pressure ceramic joint  

DOEpatents

Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures.

Ward, Michael E. (Poway, CA); Harkins, Bruce D. (San Diego, CA)

1993-01-01

173

High pressure ceramic joint  

DOEpatents

Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures. 4 figures.

Ward, M.E.; Harkins, B.D.

1993-11-30

174

Joining of advanced materials by superplastic deformation  

DOEpatents

A method for utilizing superplastic deformation with or without a novel joint compound that leads to the joining of advanced ceramic materials, intermetallics, and cermets. A joint formed by this approach is as strong as or stronger than the materials joined. The method does not require elaborate surface preparation or application techniques.

Goretta, Kenneth C. (Downers Grove, IL) [Downers Grove, IL; Routbort, Jules L. (Hinsdale, IL) [Hinsdale, IL; Gutierrez-Mora, Felipe (Woodridge, IL) [Woodridge, IL

2008-08-19

175

Joining of Advanced Materials by Superplastic Deformation.  

National Technical Information Service (NTIS)

A method for utilizing superplastic deformation with or without a novel joint compound that leads to the joining of advanced ceramic materials, intermetallics, and cermets. A joint formed by this approach is as strong as or stronger than the materials joi...

F. Gutierrez-Mora J. L. Routbort K. C. Goretta

2005-01-01

176

Clinical features of symptomatic patellofemoral joint osteoarthritis  

PubMed Central

Introduction Patellofemoral joint osteoarthritis (OA) is common and leads to pain and disability. However, current classification criteria do not distinguish between patellofemoral and tibiofemoral joint OA. The objective of this study was to provide empirical evidence of the clinical features of patellofemoral joint OA (PFJOA) and to explore the potential for making a confident clinical diagnosis in the community setting. Methods This was a population-based cross-sectional study of 745 adults aged ?50 years with knee pain. Information on risk factors and clinical signs and symptoms was gathered by a self-complete questionnaire, and standardised clinical interview and examination. Three radiographic views of the knee were obtained (weight-bearing semi-flexed posteroanterior, supine skyline and lateral) and individuals were classified into four subsets (no radiographic OA, isolated PFJOA, isolated tibiofemoral joint OA, combined patellofemoral/tibiofemoral joint OA) according to two different cut-offs: 'any OA' and 'moderate to severe OA'. A series of binary logistic and multinomial regression functions were performed to compare the clinical features of each subset and their ability in combination to discriminate PFJOA from other subsets. Results Distinctive clinical features of moderate to severe isolated PFJOA included a history of dramatic swelling, valgus deformity, markedly reduced quadriceps strength, and pain on patellofemoral joint compression. Mild isolated PFJOA was barely distinguished from no radiographic OA (AUC 0.71, 95% CI 0.66, 0.76) with only difficulty descending stairs and coarse crepitus marginally informative over age, sex and body mass index. Other cardinal signs of knee OA - the presence of effusion, bony enlargement, reduced flexion range of movement, mediolateral instability and varus deformity - were indicators of tibiofemoral joint OA. Conclusions Early isolated PFJOA is clinically manifest in symptoms and self-reported functional limitation but has fewer clear clinical signs. More advanced disease is indicated by a small number of simple-to-assess signs and the relative absence of classic signs of knee OA, which are predominantly manifestations of tibiofemoral joint OA. Confident diagnosis of even more advanced PFJOA may be limited in the community setting.

2012-01-01

177

Dissimilar metals joint evaluation  

NASA Technical Reports Server (NTRS)

Dissimilar metals tubular joints between 2219-T851 aluminum alloy and 304L stainless steel were fabricated and tested to evaluate bonding processes. Joints were fabricated by four processes: (1) inertia (friction) weldings, where the metals are spun and forced together to create the weld; (2) explosive welding, where the metals are impacted together at high velocity; (3) co-extrusion, where the metals are extruded in contact at high temperature to promote diffusion; and (4) swaging, where residual stresses in the metals after a stretching operation maintain forced contact in mutual shear areas. Fifteen joints of each type were prepared and evaluated in a 6.35 cm (2.50 in.) O.D. size, with 0.32 cm (0.13 in.) wall thickness, and 7.6 cm (3.0 in) total length. The joints were tested to evaluate their ability to withstand pressure cycle, thermal cycle, galvanic corrosion and burst tests. Leakage tests and other non-destructive test techniques were used to evaluate the behavior of the joints, and the microstructure of the bond areas was analyzed.

Wakefield, M. E.; Apodaca, L. E.

1974-01-01

178

Robotic Bladder Joint  

NASA Technical Reports Server (NTRS)

Reliable, lightweight robotic joint suitable for variety of applications, actuated hydraulically, without need for heavy mechanical cylinders or gears on joint itself. Includes two members; first member rotates about pin at end of second member. Includes cam, over which tension line stretched. Ends of tension line anchored at end of second member opposite end that holds pin. Bladder placed on each side of second member, squeezed between second member and tension line. Pressures and/or amounts of fluid in bladders controlled by use of conventional equipment like pumps, valves, and reservoirs. Bladder on one side inflated more than on other side; greater inflation on one side causes greater stretching of tension line on that side. Greater tension pulls on cam, turning first member toward that side. Angle of joint controlled by controlling differential inflation of two bladders.

Robertson, Glen A.

1995-01-01

179

Electrical properties of cold-pressing welded NbTi persistent joints  

NASA Astrophysics Data System (ADS)

The cold-pressing welding method is employed to fabricate persistent joints between NbTi multifilamentary conductors, and a series of persistent joints are thus made at different mechanical pressures. The electrical properties of these persistent joints are tested by a joint resistance measurement device based on the current decay measurement method. Test results show that the cold-pressing welding method is reliable and applicable to NMR and MRI applications. Experiment results also shows that the joint resistances and current-carrying capacities of the joints seem to have no apparent relevance to the mechanical pressure in a wide range of 4-20 MPa, but the current decay ratio due to flux creep has obvious relevance to the mechanical pressure. Further research is needed to advance this joint manufacturing technology. Besides, measured current increase under 1 T background magnetic field is observed and explained, which has a reference meaning for testing persistent joint resistances.

Liu, Jianhua; Cheng, Junsheng; Zhou, Feng; Wang, Qiuliang; Chang, Kun; Li, Xian

2013-12-01

180

[Combination therapy of doxifluridine (5'-DFUR) + cyclophosphamide (CPA) + tamoxifen (TAM) for advanced or recurrent breast cancer. Joint Research Group in the Osaka Area for Combination Therapy of 5'-DFUR with Other Drugs].  

PubMed

Outpatients with advanced and recurrent breast cancer were treated by a combination therapy of the following drugs: doxifluridine (5'-DFUR) orally administered at a dose of 1200 mg/day; cyclophosphamide (CPA) orally given at dose of 100 mg/day; and tamoxifen (TAM) orally given at dose of 20 mg daily. 5'-DFUR and CPA were administered on consecutive days 1-14, then discontinued for 14 days. The response rate was 44.8% including five CR and eight PR out of 29 complete cases. As for response cases in terms of the subject lesions, corresponding cases were chiefly found in soft tissue and the lung. As for the response rate with or without pretreatment, cases previously treated showed a higher response rate such as 42.9% indicating that the present therapy was effective in pretreatment cases. The main side effect was leukopenia, but not so severe. Few cases with diarrhea were found. Based on the above findings, the present treatment is conceivably a highly useful therapy, on an outpatient basis, for advanced and recurrent breast cancer, especially metastatic lesions of soft tissue and the lung. PMID:1386974

Ota, J; Taguchi, T; Sakai, K; Irie, K; Terasawa, T; Shimoyama, T; Kawahara, T; Okumura, T; Yamamoto, M; Yasutake, K

1992-08-01

181

Space Technology: Vital Capabilities for Warfighters.  

National Technical Information Service (NTIS)

Consider for a few moments the challenge of accurately predicting the possibility and utility of technological developments. In 1895, Lord William Thomson Kelvin, the Scottish mathematician and physicist, noted, 'Heavier-than-air flying machines are impos...

J. J. Cosumano

2003-01-01

182

Energy for the Warfighter: Operational Energy Strategy.  

National Technical Information Service (NTIS)

For the first time, the Department of Defense (DoD) is publishing a strategy to transform the way the Department consumes energy in military operations, consistent with 10 U.S.C. section 138c. Section 138c establishes an Assistant Secretary of Defense for...

2011-01-01

183

Value of Logistics Information to the Warfighter.  

National Technical Information Service (NTIS)

This MBA project analyzes the benefit of integrating Radio Frequency Identification (RFID) technology into the Department of Defense supply chain management infrastructure. The project confirms the existence of an inherent value in logistics information u...

C. J. Corrigan J. E. Kielar

2004-01-01

184

Web 2.0 and Warfighter Training.  

National Technical Information Service (NTIS)

Web 2.0 services refer to web-based applications that allow a user to create and publish their own unique content. They also include services that allow mass collaboration among self-organized communities. Tim O'Reilly defines Web 2.0 as any set of tools ...

R. D. Smith

2008-01-01

185

Nonlethal Munitions (NLM) Expand Warfighter Capabilities.  

National Technical Information Service (NTIS)

In the jumbled terrain of modern urban combat, the preferred theater of operations for today's terrorists, the need to distinguish combatant from noncombatant is paramount. In a war with no fixed fronts, with no clearly identifiable foe, where the very de...

F. Choudhury

2008-01-01

186

Convoy Active Safety Technologies Warfighter Experiment I  

Microsoft Academic Search

The operational ability to project and sustain forces in distant, anti-access and area denial environments poses new challenges for combatant commanders. One of the new challenges is the ability to conduct sustainment operations at operationally feasible times and places on the battlefield. Combatant commanders require a sustainment system that is agile, versatile, and survivable throughout the range of military operations

Edward Schoenherr; Bernard L. Theisen; Asisat Animashaun; James Davis Jr.; Christopher Day

2008-01-01

187

MEF Liaison Element: Restoring a Warfighting Capability.  

National Technical Information Service (NTIS)

Active duty Air-Naval Gunfire Liaison Companies (ANGLICO) were deactivated in 1998 and 1999. The MEF Liaison Element (MLE) was formed in an attempt do provide world-wide cultural and linguistic liaison for the Fleet Marine Forces (FMF) when operating with...

J. K. Aruda

2001-01-01

188

Cyber Operations and the Warfighting Functions.  

National Technical Information Service (NTIS)

In 2005, the Department of Defense recognized cyberspace as the fifth operational domain. In 2009, the Commander of U.S. Strategic Command directed the creation of U.S. Cyber Command on the heels of recently reported cyber attacks against Estonia and Geor...

W. S. Sutton

2013-01-01

189

New Joint Sealants. Criteria, Design and Materials.  

ERIC Educational Resources Information Center

Contents include--(1) sealing concrete joints, (2) sealing glass and metal joints, (3) metal and glass joint sealants from a fabricator's viewpoint, (4) a theory of adhesion for joint sealants, (5) geometry of simple joint seals under strain, (6) joint sealant specifications from a manufacturer's viewpoint, (7) joint sealant requirements from an…

Building Research Inst., Inc., Washington, DC.

190

Joint Fires Training Guide for a Corps Joint Task Force.  

National Technical Information Service (NTIS)

A detailed analysis of responsibilities, inputs, processes, outputs, and interactions was conducted for the staff elements and cells involved in joint fires at the Corps Joint Task Force level. This research product documents that analysis. The purpose of...

J. F. Love

1998-01-01

191

Principles of Jointness.  

National Technical Information Service (NTIS)

Despite all the attention given to jointness since World War II, there is no comprehensive theory that underpins the concept in doctrine. This is unusual in light of the large body of literature on operational art. Most military practitioners find operati...

R. C. Rubel

2001-01-01

192

Periprosthetic Joint Infection  

Microsoft Academic Search

The orthopedic community has begun to witness a worrisome rise in the incidence of periprosthetic joint infections (PJIs) caused by resistant organisms. Besides other challenges associated with treating these infections, it appears that these infections may pose a higher cost compared to infections caused by sensitive organisms. Significantly higher cost of care for treatment of infections due to methicillin-resistant organisms

Javad Parvizi; Ian M. Pawasarat; Khalid A. Azzam; Ashish Joshi; Erik N. Hansen; Kevin J. Bozic

2010-01-01

193

Adhesively-bonded joints and repairs in metallic alloys, polymers and composite materials: Adhesives, adhesion theories and surface pretreatment  

Microsoft Academic Search

In the present paper, the following topics are reviewed in detail: (a) the available adhesives, as well as their recent advances, (b) thermodynamic factors affecting the surface pretreatments including adhesion theories, wettability, surface energy, (c) bonding mechanisms in the adhesive joints, (d) surface pretreatment methods for the adhesively bonded joints, and as well as their recent advances, and (e) combined

A. Baldan

2004-01-01

194

Recent advances in rheumatoid arthritis  

Microsoft Academic Search

Management of rheumatoid arthritis (RA) has radically changed over the last decade. Diagnostic methods have improved with availability of highly specific tests such as antibody to cyclic citrullinated peptide (specificity ?96%), and introduction of advanced imaging modalities such as ultrasound and magnetic resonance imaging to facilitate earlier diagnosis. The current aim of management is to achieve remission and prevent joint

Ernest Suresh

2010-01-01

195

Comparison of 2 temporomandibular joint total joint prosthesis systems  

Microsoft Academic Search

Purpose: The study goal was to evaluate the comparative outcomes of patients treated with temporomandibular joint (TMJ) total joint prostheses, using either the Christensen prosthesis (TMJ Inc, Golden, CO) (CP) or the TMJ Concepts prosthesis (TMJ Concepts Inc, Camarillo, CA; formerly Techmedica Inc) (TP). Patients and Methods: Forty-five consecutive patients treated with either CP or TP total joint prostheses were

Larry M. Wolford; Douglas J. Dingwerth; Reena M. Talwar; Marcos C. Pitta

2003-01-01

196

What is Joint Interdependence Anyway.  

National Technical Information Service (NTIS)

There is much ado lately about the concept of 'joint interdependence' in future military operations. More than one four-star general has praised Operation Desert Storm's joint deconfliction; that is, the conduct of relatively independent service operation...

C. R. Paparone J. A. Crupi

2004-01-01

197

Cellular Pressure-Actuated Joint  

NASA Technical Reports Server (NTRS)

A modification of a pressure-actuated joint has been proposed to improve its pressure actuation in such a manner as to reduce the potential for leakage of the pressurizing fluid. The specific joint for which the modification is proposed is a field joint in a reusable solid-fuel rocket motor (RSRM), in which the pressurizing fluid is a mixture of hot combustion gases. The proposed modification could also be applicable to other pressure-actuated joints of similar configuration.

McGuire, John R.

2003-01-01

198

Double slotted socket spherical joint  

DOEpatents

A new class of spherical joints is disclosed. These spherical joints are capable of extremely large angular displacements (full cone angles in excess of 270.degree.), while exhibiting no singularities or dead spots in their range of motion. These joints can improve or simplify a wide range of mechanical devices.

Bieg, Lothar F. (Albuquerque, NM); Benavides, Gilbert L. (Albuquerque, NM)

2001-05-22

199

The Challenges of Joint Attention  

Microsoft Academic Search

This paper discusses the concept of joint at- tention and the dierent skills underlying its development. We argue that joint attention is much more than gaze following or simul- taneous looking because it implies a shared intentional relation to the world. The current state-of-the-art in robotic and computational models of the dierent prerequisites of joint attention is discussed in relation

Frederic Kaplan; Verena V. Hafner

2004-01-01

200

Glued joints in hardwood timber  

Microsoft Academic Search

The use of glued joints offers an option with ample aesthetic and functional possibilities in the design of wood structures. This type of joint is used since years 1970 in countries of North and Central Europe, for the design and construction of glulam (glued laminated timber) structures. This has led to diverse investigations in the experimental analysis of joints made

D Otero Chans; J. Estévez Cimadevila; E. Martín Gutiérrez

2008-01-01

201

Phase 1 Program Joint Report  

NASA Technical Reports Server (NTRS)

This report consists of inputs from each of the Phase I Program Joint Working Groups. The Working Groups were tasked to describe the organizational structure and work processes that they used during the program, joint accomplishments, lessons learned, and applications to the International Space Station Program. This report is a top-level joint reference document that contains information of interest to both countries.

Nield, George C. (Editor); Vorobiev, Pavel Mikhailovich (Editor)

1999-01-01

202

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This report includes a review of the progress made in ACTF Flow Loop development and research during 90 days pre-award period (May 15-July 14, 1999) and the following three months after the project approval date (July15-October 15, 1999) The report presents information on the following specific subjects; (a) Progress in Advanced Cuttings Transport Facility design and development, (b) Progress report on the research project ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (c) Progress report on the research project ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (d) Progress report on the research project ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (e) Progress report on the research project ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Progress report on the instrumentation tasks (Tasks 11 and 12) (g) Activities towards technology transfer and developing contacts with oil and service company members.

Ergun Kuru; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Len Volk; Mark Pickell; Evren Ozbayoglu; Barkim Demirdal; Paco Vieira; Affonso Lourenco

1999-10-15

203

Shoulder joint tuberculosis  

PubMed Central

Summary Background: Despite the fact that joint tuberculosis is one of the most common forms of extrapulmonary tuberculosis, it is a disease entity that is very rare in Poland (less than 100 cases a year in the last 10 years). The symptoms are non-specific, and thus the disease is rarely taken into account in preliminary differential diagnosis. Case Report: A 68-year-old female patient was admitted to the Internal Diseases Clinic due to oedema and pain of the right shoulder joint. The pain has been increasing for about 8 months. Physical examination revealed increased circumference and elevated temperature of the right shoulder joint. Limb function was retained. The full range of radiological and laboratory diagnostic examinations was performed, including the biopsy of the affected tissue which revealed the presence of Mycobacterium tuberculosis in the bacterial culture. Clinical improvement was obtained after introduction of TB drugs. Conclusions: Radiological diagnostic methods (X-ray, CT scans, MRI scans) provide high precision monitoring of articular lesions. However, the decisive diagnosis requires additional laboratory tests as well as histopathological and bacteriological assays.

Ostrowska, Monika; Gietka, Jan; Nesteruk, Tomasz; Piliszek, Agnieszka; Walecki, Jerzy

2012-01-01

204

JADS/Joint Stars End-To-End Test is an Outstanding Success.  

National Technical Information Service (NTIS)

KIRTLAND AIR FORCE BASE, NM - The Joint Advanced Distributed Simulation (JADS) Joint Test Force (JTF) announced that the live test missions flown on 25 and 31 March 1999 achieved outstanding success and completed the fourth and final phase of the JADS End...

1999-01-01

205

75 FR 55365 - Advisory Committee on Reactor Safeguards (ACRS) Meeting of the ACRS Joint Subcommittee  

Federal Register 2010, 2011, 2012, 2013

...Subcommittee The ACRS Subcommittees on Thermal Hydraulics Phenomena; Advanced Boiling Water Reactor (ABWR); and Materials, Metallurgy, and Reactor Fuels will hold a joint meeting on October 4, 2010, Room T-2B1, 11545 Rockville Pike, Rockville,...

2010-09-10

206

ROUTINE THREE-DIMENSIONAL MAGNETIC RESONANCE IMAGING OF JOINTS  

PubMed Central

Due to its high spatial resolution and excellent tissue contrast, magnetic resonance (MR) imaging has become the most commonly used imaging method to evaluate joints. Most musculoskeletal MR imaging is performed using two-dimensional fast spin-echo sequences. However, three-dimensional sequences have also been used for joint imaging and have the advantage of acquiring thin continuous slices through joints which reduces the effects of partial volume averaging. With recent advances in MR technology, three-dimensional sequences with isotropic resolution have been developed. These sequences allow high quality multi-planar reformat images to be obtained following a single acquisition, thereby eliminating the need to repeat sequences with identical tissue contrast in different planes. Preliminary results on the diagnostic performance of three-dimensional isotropic resolution sequences are encouraging. However, additional studies are needed to determine whether these sequences can replace currently used two-dimensional fast spin-echo sequences for providing comprehensive joint assessment in clinical practice.

Kijowki, Richard; Gold, Garry E.

2011-01-01

207

Ruscoe 983 Joint Sealant: Product Evaluation.  

National Technical Information Service (NTIS)

This report contains a product evaluation of Ruscoe's 983 joint sealant. Ruscoe 983 is an asphalt base single compound joint sealant. It contains an aluminum fortified adhesive and is designed for use on highway expansion joints, bridge joints, and random...

S. L. Tritsch T. M. Wolfe

1986-01-01

208

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2012 CFR

...The joints. As regards the joints the factors of disability...movement than normal (from flail joint, resections, nonunion of...movements smoothly. (f) Pain on movement, swelling...and ankle are considered major joints; multiple involvements of...

2012-07-01

209

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2010 CFR

...The joints. As regards the joints the factors of disability...movement than normal (from flail joint, resections, nonunion of...movements smoothly. (f) Pain on movement, swelling...and ankle are considered major joints; multiple involvements of...

2010-07-01

210

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2011 CFR

...The joints. As regards the joints the factors of disability...movement than normal (from flail joint, resections, nonunion of...movements smoothly. (f) Pain on movement, swelling...and ankle are considered major joints; multiple involvements of...

2011-07-01

211

49 CFR 213.121 - Rail joints.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Rail joints. 213.121 Section 213.121 Transportation...SAFETY STANDARDS Track Structure § 213.121 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2013-10-01

212

Volar plate arthroplasty of the distal interphalangeal joint  

Microsoft Academic Search

Ten patients with chronic dorsal fracture subluxation of the distal interphalangeal joint were managed over 5 years with volar plate advancement arthroplasty. The mean time from injury to definitive surgical treatment was 8 weeks (range, 2 weeks to 4 months). All injuries were characterized by volar comminution and impaction of the distal phalanx, with associated dorsal subluxation. Surgical treatment included

Michael E Rettig; Gabriel Dassa; Keith B Raskin

2001-01-01

213

Testing of explosive welding and welded joints: joint mechanism and properties of explosive welded joints  

Microsoft Academic Search

In this study physical mechanism of explosive welding joint was analysed. The mechanism refers to wavy joint with interpass\\u000a and without one. Plastic strain, viscosity and acoustic waves were applied to explain the problem. The own model of the mechanism\\u000a of oxide removal for the direct joint and test results confirming the bonding mechanism were showed.

Bogumil Wronka

2010-01-01

214

Joint Center for Energy Storage Research  

SciTech Connect

The Joint Center for Energy Storage Research (JCESR) is a major public-private research partnership that integrates U.S. Department of Energy national laboratories, major research universities and leading industrial companies to overcome critical scientific challenges and technical barriers, leading to the creation of breakthrough energy storage technologies. JCESR, centered at Argonne National Laboratory, outside of Chicago, consolidates decades of basic research experience that forms the foundation of innovative advanced battery technologies. The partnership has access to some of the world's leading battery researchers as well as scientific research facilities that are needed to develop energy storage materials that will revolutionize the way the United States and the world use energy.

Eric Isaacs

2012-11-30

215

Laboratory characterization of rock joints  

SciTech Connect

A laboratory characterization of the Apache Leap tuff joints under cyclic pseudostatic and dynamic loads has been undertaken to obtain a better understanding of dynamic joint shear behavior and to generate a complete data set that can be used for validation of existing rock-joint models. Study has indicated that available methods for determining joint roughness coefficient (JRC) significantly underestimate the roughness coefficient of the Apache Leap tuff joints, that will lead to an underestimation of the joint shear strength. The results of the direct shear tests have indicated that both under cyclic pseudostatic and dynamic loadings the joint resistance upon reverse shearing is smaller than that of forward shearing and the joint dilation resulting from forward shearing recovers during reverse shearing. Within the range of variation of shearing velocity used in these tests, the shearing velocity effect on rock-joint behavior seems to be minor, and no noticeable effect on the peak joint shear strength and the joint shear strength for the reverse shearing is observed.

Hsiung, S.M.; Kana, D.D.; Ahola, M.P.; Chowdhury, A.H.; Ghosh, A. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1994-05-01

216

Joint Contracture Orthosis (JCO).  

National Technical Information Service (NTIS)

The purpose of this project was to develop an advanced orthosis which is effective in reducing upper and lower limb contractures in significantly less time than currently required with conventional methods. The team that developed the JCO consisted of an ...

K. McGee K. Parsons T. Krouskop T. R. Lunsford

1997-01-01

217

Joint Space Operations Center (JSpOC) Mission System (JMS)  

NASA Astrophysics Data System (ADS)

US space capabilities benefit the economy, national security, international relationships, scientific discovery, and our quality of life. Realizing these space responsibilities is challenging not only because the space domain is increasingly congested, contested, and competitive but is further complicated by the legacy space situational awareness (SSA) systems approaching end of life and inability to provide the breadth of SSA and command and control (C2) of space forces in this challenging domain. JMS will provide the capabilities to effectively employ space forces in this challenging domain. Requirements for JMS were developed based on regular, on-going engagement with the warfighter. The use of DoD Architecture Framework (DoDAF) products facilitated requirements scoping and understanding and transferred directly to defining and documenting the requirements in the approved Capability Development Document (CDD). As part of the risk reduction efforts, the Electronic System Center (ESC) JMS System Program Office (SPO) fielded JMS Capability Package (CP) 0 which includes an initial service oriented architecture (SOA) and user defined operational picture (UDOP) along with force status, sensor management, and analysis tools. Development efforts are planned to leverage and integrate prototypes and other research projects from Defense Advanced Research Projects Agency, Air Force Research Laboratories, Space Innovation and Development Center, and Massachusetts Institute of Technology/Lincoln Laboratories. JMS provides a number of benefits to the space community: a reduction in operational “transaction time” to accomplish key activities and processes; ability to process the increased volume of metric observations from new sensors (e.g., SBSS, SST, Space Fence), as well as owner/operator ephemerides thus enhancing the high accuracy near-real-time catalog, and greater automation of SSA data sharing supporting collaboration with government, civil, commercial, and foreign entities. Continued success in JMS depends on continued support from across the space community. Key activities where community participation is essential include the C2 SSA Community of Interest (COI) development and refinement, creative strategies for faster, better, cheaper development, and defining the next set of capabilities.

Morton, M.; Roberts, T.

2011-09-01

218

Soldering of mild steels: functional joints  

Microsoft Academic Search

In recent years, adhesive joints have replaced numerous soldered joints, especially in applications where electrical conductivity is not required from the members of the joint. Nevertheless, soldered joints are still used in applications ranging from electronics to high-technology components. The present work seeks to demonstrate that soldered joints, which can be considered as functional joints, have very good mechanical properties

F. Molleda; J. Mora; E. Carillo; B. G Mellor

2003-01-01

219

Advanced Training Technologies and Learning Environments  

NASA Technical Reports Server (NTRS)

This document contains the proceedings of the Workshop on Advanced Training Technologies and Learning Environments held at NASA Langley Research Center, Hampton, Virginia, March 9-10, 1999. The workshop was jointly sponsored by the University of Virginia's Center for Advanced Computational Technology and NASA. Workshop attendees were from NASA, other government agencies, industry, and universities. The objective of the workshop was to assess the status and effectiveness of different advanced training technologies and learning environments.

Noor, Ahmed K. (Compiler); Malone, John B. (Compiler)

1999-01-01

220

Advanced drilling systems study  

SciTech Connect

This work was initiated as part of the National Advanced Drilling and Excavation Technologies (NADET) Program. It is being performed through joint finding from the Department of Energy Geothermal Division and the Natural Gas Technology Branch, Morgantown Energy Technology Center. Interest in advanced drilling systems is high. The Geothermal Division of the Department of Energy has initiated a multi-year effort in the development of advanced drilling systems; the National Research Council completed a study of drilling and excavation technologies last year; and the MIT Energy Laboratory recently submitted a proposal for a national initiative in advanced drilling and excavation research. The primary reasons for this interest are financial. Worldwide expenditures on oil and gas drilling approach $75 billion per year. Also, drilling and well completion account for 25% to 50% of the cost of producing electricity from geothermal energy. There is incentive to search for methods to reduce the cost of drilling. Work on ideas to improve or replace rotary drilling technology dates back at least to the 1930`s. There was a significant amount of work in this area in the 1960`s and 1970`s; and there has been some continued effort through the 1980`s. Undoubtedly there are concepts for advanced drilling systems that have yet to be studied; however, it is almost certain that new efforts to initiate work on advanced drilling systems will build on an idea or a variation of an idea that has already been investigated. Therefore, a review of previous efforts coupled with a characterization of viable advanced drilling systems and the current state of technology as it applies to those systems provide the basis for the current study of advanced drilling.

Pierce, K.G. [Sandia National Labs., Albuquerque, NM (United States); Livesay, B.J. [Livesay Consultants, San Diego, CA (United States)

1995-03-01

221

Horizontal Advanced Tensiometer  

DOEpatents

An horizontal advanced tensiometer is described that allows the monitoring of the water pressure of soil positions, particularly beneath objects or materials that inhibit the use of previous monitoring wells. The tensiometer includes a porous cup, a pressure transducer (with an attached gasket device), an adaptive chamber, at least one outer guide tube which allows access to the desired horizontal position, a transducer wire, a data logger and preferably an inner guide tube and a specialized joint which provides pressure on the inner guide tube to maintain the seal between the gasket of the transducer and the adaptive chamber.

Hubbell, Joel M.; Sisson, James B.

2004-06-22

222

Bladder operated robotic joint  

NASA Technical Reports Server (NTRS)

This invention is a robotic joint which is operated by inflatable bladders and which can be used in applications where it is desired to move or hold an object. A support block supports an elongated plate to which is pivotally attached a finger. A tension strip passes over a lever attached to the finger and is attached at its ends to the support block on opposite sides of the plate. Bladders positioned between the plate and the tension strip on opposite sides of the plate can be inflated by pumps to pivot the finger, with one of the bladders being inflated while the other is being deflated.

Robertson, Glen A. (inventor)

1993-01-01

223

Tarsometatarsal/Lisfranc joint.  

PubMed

Accurate early diagnosis with adequate reduction and maintenance of anatomic alignment of the dislocation or fracture within the Lisfranc joint complex have been found to be the key to successful outcomes regarding this injury. Because of the anatomic variations, the thin soft tissue envelop, and the abundance of ligamentous and capsular structures in the region, repair of these injuries can be a challenge. The classification systems used to describe these injuries aid in describing the mechanism of injury or displacement type present, which may aid in determining what treatment modality can provide the best outcome. PMID:22424486

DiDomenico, Lawrence A; Cross, Davi

2012-04-01

224

Metal to ceramic sealed joint  

DOEpatents

A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system. 11 figures.

Lasecki, J.V.; Novak, R.F.; McBride, J.R.

1991-08-27

225

Metal to ceramic sealed joint  

DOEpatents

A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system.

Lasecki, John V. (Livonia, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

1991-01-01

226

Glenohumeral Joint Injections  

PubMed Central

Context: Intra-articular injections into the glenohumeral joint are commonly performed by musculoskeletal providers, including orthopaedic surgeons, family medicine physicians, rheumatologists, and physician assistants. Despite their frequent use, there is little guidance for injectable treatments to the glenohumeral joint for conditions such as osteoarthritis, adhesive capsulitis, and rheumatoid arthritis. Evidence Acquisition: We performed a comprehensive review of the available literature on glenohumeral injections to help clarify the current evidence-based practice and identify deficits in our understanding. We searched MEDLINE (1948 to December 2011 [week 1]) and EMBASE (1980 to 2011 [week 49]) using various permutations of intra-articular injections AND (corticosteroid OR hyaluronic acid) and (adhesive capsulitis OR arthritis). Results: We identified 1 and 7 studies that investigated intra-articular corticosteroid injections for the treatment of osteoarthritis and adhesive capsulitis, respectively. Two and 3 studies investigated the use of hyaluronic acid in osteoarthritis and adhesive capsulitis, respectively. One study compared corticosteroids and hyaluronic acid injections in the treatment of osteoarthritis, and another discussed adhesive capsulitis. Conclusion: Based on existing studies and their level of evidence, there is only expert opinion to guide corticosteroid injection for osteoarthritis as well as hyaluronic acid injection for osteoarthritis and adhesive capsulitis.

Gross, Christopher; Dhawan, Aman; Harwood, Daniel; Gochanour, Eric; Romeo, Anthony

2013-01-01

227

[Aging of joint].  

PubMed

Joint disease is one of the most frequent causes of reaching a state requiring care by others. Thus, it is very important to cope with osteoarthritis (OA) in order to maintain the physical independence of elderly people. Xp findings of OA in the knee, which is the most commonly affected joint, do not correlate well with pain ; hence, on the diagnosis, MRI is useful to know the pathology of subchondral bone, cartilage or meniscus. In OA cartilage, increased degradation and decreased production of major matrix components, like type II collagen and aggrecan occur, as well as chondrocyte hypertrophy or apoptosis. In the meantime, general changes in the aging process, such as the changes of autophagy or energy metabolism, have also recently been reported. Since OA treatments at present are just against symptoms, like by NSAIDS or arthroplasty, the development of new treatment methods is expected, based on the clarification of the pathology, including consideration of the relations with aging of bone and muscles, or with metabolic syndrome. PMID:23268297

Matsui, Yasumoto; Harada, Atsushi

2013-01-01

228

OIG targets contractual joint ventures.  

PubMed

A recent OIG Special Advisory Bulletin raises questions for providers involved in joint ventures. The Bulletin describes several characteristics that the OIG views as potentially suspect, including a referral stream controlled by the provider initiating the joint venture and the use of a wholly owned subsidiary of the provider to bill and collect for services. According to the OIG, profits paid by the subsidiary to the provider owner in such "suspect contractual joint ventures" could constitute illegal remuneration for referrals. PMID:14503145

O'Hare, Patrick K

2003-09-01

229

DOE-EERC jointly sponsored research program  

SciTech Connect

U.S. Department of Energy (DOE) Cooperative Agreement DE-FC21-93MC30098 funded through the Office of Fossil Energy and administered at the Federal Energy Technology Center (FETC) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy and Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying efficient, nonpolluting energy technologies that can compete effectively in meeting market demands for clean fuels, chemical feedstocks, and electricity in the 21st century. The objective of the JSRP was to advance the deployment of advanced technologies for improving energy efficiency and environmental performance through jointly sponsored research on topics that would not be adequately addressed by the private sector alone. Examples of such topics include the barriers to hot-gas cleaning impeding the deployment of high-efficiency power systems and the search for practical means for sequestering CO{sub 2} generated by fossil fuel combustion. The selection of particular research projects was guided by a combination of DOE priorities and market needs, as provided by the requirement for joint venture funding approved both by DOE and the private sector sponsor. The research addressed many different energy resource and related environmental problems, with emphasis directed toward the EERC's historic lead mission in low-rank coals (LRCs), which represent approximately half of the U.S. coal resources in the conterminous states, much larger potential resources in Alaska, and a major part of the energy base in the former U.S.S.R., East Central Europe, and the Pacific Rim. The Base and JSRP agreements were tailored to the growing awareness of critical environmental issues, including water supply and quality, air toxics (e.g., mercury), fine respirable particulate matter (PM{sub 2.5}), and the goal of zero net CO{sub 2} emissions.

Hendrikson, J.G.; Sondreal, E.A.

1999-09-01

230

Advanced information society(5)  

NASA Astrophysics Data System (ADS)

Based on the advancement of information network technology information communication forms informationalized society giving significant impact on business activities and life style in it. The information network has been backed up technologically by development of computer technology and has got great contribution by enhanced computer technology and communication equipments. Information is transferred by digital and analog methods. Technical development which has brought out multifunctioned modems of communication equipments in analog mode, and construction of advanced information communication network which has come out by joint work of computer and communication under digital technique, are described. The trend in institutional matter and standardization of electrical communication is also described showing some examples of value-added network (VAN).

Tanizawa, Ippei

231

Disorders of the sacroiliac joint.  

PubMed

Controversies have surrounded the sacroiliac joint. The sacroiliac joint (SIJ) is a considerably complex and strong joint with limited mobility, mechanically serving as a force transducer and a shock absorber. Anatomical changes are seen in the SIJ throughout an individual's lifetime. The ligamentous system associated with the SIJ serves to enhance stability and offer proprioceptive feedback in context with the rich plexus of articular receptors. Stability in the SIJ is related to form and force closure. Movement in the SIJ is 3-D about an axis outside of the joint. The functional examination of the SIJ is related to a clinical triad. PMID:17134467

Sizer, Phillip S; Phelps, Valerie; Thompsen, Kirk

2002-03-01

232

Early Developments in Joint Action  

PubMed Central

Joint action, critical to human social interaction and communication, has garnered increasing scholarly attention in many areas of inquiry, yet its development remains little explored. This paper reviews research on the growth of joint action over the first 2 years of life to show how children become progressively more able to engage deliberately, autonomously, and flexibly in joint action with adults and peers. It is suggested that a key mechanism underlying the dramatic changes in joint action over the second year of life is the ability to reflect consciously on oneself and one’s behavior and volition and correspondingly, on the behavior, goals, and intentions of others.

Brownell, Celia A.

2012-01-01

233

Protrusio Acetabuli: New Insights and Experience with Joint Preservation  

PubMed Central

Protrusio acetabuli is identified on anteroposterior (AP) radiographs of the pelvis with an acetabular line projecting medial to the ilioischial line. We documented this radiographic sign and additional radiographic parameters in 19 patients (29 hips) with protrusio and compared the parameters to those of 29 older patients (29 hips) with advanced primary osteoarthritis (OA) but no protrusio and 12 younger patients (22 hips) with protrusio but no advanced OA. A negative acetabular roof angle and particularly large acetabular fossa were more apparent in younger patients; these hips suggest the destruction of a protrusio hip begins less in the medial joint area and more in the posteroinferior joint, and the mechanism is driven less by excessive medially directed forces but by a pincer impingement. While the indication for joint-preserving surgery currently consists primarily of a valgus femoral osteotomy based on AP radiographs and patient age, modern decision making also relies on cartilage evaluation and requires advanced surgical techniques. We conclude joint-preservation surgery must be tailored to the individual hip morphology. Level of Evidence: Level III, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.

Leunig, Michael; Turchetto, Luigino; Ganz, Reinhold

2009-01-01

234

Joint Contracture Orthosis (JCO)  

NASA Technical Reports Server (NTRS)

The purpose of this project was to develop an advanced orthosis which is effective in reducing upper and lower limb contractures in significantly less time than currently required with conventional methods. The team that developed the JCO consisted of an engineer, orthotist, therapist, and physician.

Lunsford, Thomas R.; Parsons, Ken; Krouskop, Thomas; McGee, Kevin

1997-01-01

235

Manipulators Subject to Joint Limits and Joint Velocity Limits  

Microsoft Academic Search

In this paper, a recurrent neural network called the dual neural network is proposed for online redundancy resolution of kinematically redundant manipulators. Physical constraints such as joint limits and joint velocity limits, together with the drift-free criterion as a secondary task, are incorporated into the problem formulation of redundancy resolution. Compared to other recurrent neural networks, the dual neural network

Yunong Zhang; Jun Wang; Youshen Xia

236

Corynebacterium Prosthetic Joint Infection  

PubMed Central

Identification of Corynebacterium species may be challenging. Corynebacterium species are occasional causes of prosthetic joint infection (PJI), but few data are available on the subject. Based on the literature, C. amycolatum, C. aurimucosum, C. jeikeium, and C. striatum are the most common Corynebacterium species that cause PJI. We designed a rapid PCR assay to detect the most common human Corynebacterium species, with a specific focus on PJI. A polyphosphate kinase gene identified using whole-genome sequence was targeted. The assay differentiates the antibiotic-resistant species C. jeikeium and C. urealyticum from other species in a single assay. The assay was applied to a collection of human Corynebacterium isolates from multiple clinical sources, and clinically relevant species were detected. The assay was then tested on Corynebacterium isolates specifically associated with PJI; all were detected. We also describe the first case of C. simulans PJI.

Cazanave, Charles; Greenwood-Quaintance, Kerryl E.; Hanssen, Arlen D.

2012-01-01

237

Passive Ball Capture Joint  

NASA Technical Reports Server (NTRS)

A passive ball capture joint has a sleeve with a plurality of bores distributed about a circumference thereof and formed therethrough at an acute angle relative to the sleeve's longitudinal axis. A spring-loaded retainer is slidingly fitted in each bore and is biased such that, if allowed, will extend at least partially into the sleeve to retain a ball therein. A ring, rotatably mounted about the bores, has an interior wall defining a plurality of shaped races that bear against the spring-loaded retainers. A mechanized rotational force producer is coupled to the ring. The ring can be rotated from a first position (that presses the retainers into the sleeve to lock the ball in place) to a second position (that allows the retainers to springback out of the sleeve to release the ball).

Cloyd, Richard A. (Inventor); Bryan, Thomas C. (Inventor)

2003-01-01

238

International Joint Commission  

NSDL National Science Digital Library

The International Joint Commission was created by Canada and the United States "because they recognized that each country is affected by the other's actions in lake and river systems along the border. The two countries cooperate to manage these waters wisely and to protect them for the benefit of today's citizens and future generations." Visitors to the site can read about great lakes water quality issues, great lakes exports, water levels, news releases, publications, view maps, and much more. One of the latest publications available on the site includes the proceeding from a workshop entitled Addressing Atmospheric Mercury: Science and Policy. This extensive site is well organized and written, giving anyone living near or interested in the great lakes a good source for timely and important information.

239

Slip joint connector  

NASA Technical Reports Server (NTRS)

A slip joint connector for joining first and second structural elements together is presented. The connector has a first body member attachable to the first structural element and a second body member attachable to the second structural element. The first body member has a male protuberance including a conical portion and the second body member has a conical receptacle for cooperatively receiving the conical portion of the protuberance. The protuberance includes a bridging portion for spacing the conical portion from the remainder of the first body member and the second body member has a well communicating with the conical receptacle for receiving the bridging portion. The conical male portion internally carries a nut while the second body member may receive a bolt through the receptacle to be threadedly received by the nut to secure the first and second body members tightly together.

Thomas, Frank P. (inventor)

1994-01-01

240

International Joint Commission  

NSDL National Science Digital Library

The International Joint Commission was created by Canada and the United States "because they recognized that each country is affected by the other's actions in lake and river systems along the border. The two countries cooperate to manage these waters wisely and to protect them for the benefit of today's citizens and future generations." Visitors to the site can read about great lakes water quality issues, great lakes exports, water levels, news releases, publications, view maps, and much more. One of the latest publications available on the site includes the proceeding from a workshop entitled Addressing Atmospheric Mercury: Science and Policy. This extensive site is well organized and written, giving anyone living near or interested in the great lakes a good source for timely and important information.

2008-08-27

241

Advanced teleoperators. [remote manipulation system  

NASA Technical Reports Server (NTRS)

Advanced teleoperators are discussed, with emphasis on the remote manipulation system designed to perform such actions as grasping, orienting, moving, placing, and inserting objects. Geometrical performance dimensions are considered, indicating that a manipulator is limited to three-orders-of-magnitude ratio of workspace extension to positioning accuracy. The control system is examined, showing that a manipulative task requires coordination of several joints, with the relationship between the task definers and the joint variables given by complex trigonometrical transformations. Control modes developed in the last 30 years are noted, including program controlled industrial 'robots' which can endlessly repeat a fixed sequence of motions without operator intervention, and the sensor-referenced/computer-controlled mode manipulators. Advanced proximity sensor systems are taken into account, with emphasis on the applications of the force-torque and slip models. The proximity sensor system for the shuttle-size manipulator is described.

Bejczy, A. K.

1979-01-01

242

Relationship between joint effusion, joint pain, and protein levels in joint lavage fluid of patients with internal derangement and osteoarthritis of the temporomandibular joint  

Microsoft Academic Search

Purpose: The purpose of this study was to investigate the relationship between the presence of joint effusion, joint pain, and protein levels in joint lavage fluid (JL) of patients with internal derangement (ID) and osteoarthritis (OA) of the temporomandibular joint (TMJ).Patients and Methods: Thirty-eight joints in 26 patients with ID and OA of the TMJ were studied. Magnetic resonance imaging

Tetsu Takahashi; Hirokazu Nagai; Hiroshi Seki; Masayuki Fukuda

1999-01-01

243

Failure Limiting Pipe Expansion Joint.  

National Technical Information Service (NTIS)

The patent application describes a failure limiting pipe expansion joint for fluid conduits. It comprises a bellows, single or multi-ply, welded into each pipe section, a ribbed inner sleeve welded to the pipe at one end of the expansion joint; an outer s...

F. A. Flint

1974-01-01

244

Exercise and the Knee Joint.  

ERIC Educational Resources Information Center

This report by the President's Council on Physical Fitness and Sports examines the effects of various forms of physical exercise on the knee joint which, because of its vulnerability, is especially subject to injury. Discussion centers around the physical characteristics of the joint, commonly used measurements for determining knee stability,…

Clarke, H. Harrison, Ed.

1976-01-01

245

Joint Targeting Planning Training Guide.  

National Technical Information Service (NTIS)

This guide resulted from an effort to develop a new approach to assessment and diagnostic training feedback in joint training. The guide resulted from a front-end analysis of joint targeting for an air campaign planning simulation. The analysis generated ...

J. F. Love

1998-01-01

246

Contraction Joint for Concrete Linings.  

National Technical Information Service (NTIS)

The invention relates to a contraction joint for use in forming a layer of concrete, and more particularly to a contraction joint for use in monolithic method of forming concrete linings suitable for use in water conveyance systems, such as canals or rese...

R. A. Hill T. J. Gorman

1988-01-01

247

[Metacarpophalangeal joint injuries and sequelae].  

PubMed

Injuries of the metacarpophalangeal joints of the thumb and fingers are of a bony or ligamentous nature. They can heal without subsequent problems if correctly diagnosed and treated but incorrect or absent diagnostics and therapy can result in chronic instability, dislocation, fusion as well as subsequent arthritis and functional limitations. They can lead to substantial impairment of the gripping function. Fractures with inclusion of joints and with fragments sufficiently large for refixation are as a rule treated operatively just as differences in torsion and instability. Persisting instabilities are secondarily stabilized by ligamentoplasty and arthritis of the metacarpophalangeal joint of the thumb is treated by fusion. For metacarpophalangeal joints of the fingers the main concern is preserving motion. Established salvage operations for arthritis include denervation, resection arthroplasty and systematic arthrolysis for impairment of the joint and contractures with intact joint surfaces. Even in chronic conditions, with appropriate treatment good functional results for metacarpophalangeal joints of the thumb and fingers can be achieved. This article presents the current pathophysiological principles and concepts for diagnostics and therapy of acute and chronic injuries of the metacarpophalangeal joints of fingers and thumbs. PMID:24700083

Meier, R

2014-04-01

248

Lubrication and wear of ultra-high molecular weight polyethylene in total joint replacements  

Microsoft Academic Search

This paper reviews recent advances in the tribology of artificial joints. Emphasis is placed on the latest developments in understanding wear mechanisms and in wear testing of ultra-high molecular weight polyethylene (UHMWPE) materials and components. Two major advances have been made. One is the discovery and recognition of the importance of multidirectional motion in wear mechanisms and wear testing of

A Wang; A Essner; V. K Polineni; C Stark; J. H Dumbleton

1998-01-01

249

Shock transmissibility of threaded joints  

SciTech Connect

Sandia National Laboratories (SNL) designs mechanical systems with threaded joints that must survive high shock environments. These mechanical systems include penetrators that must survive soil and rock penetration; drilling pipe strings that must survive rock-cutting, shock environments; and laydown weapons that must survive delivery impact shock. This paper summarizes an analytical study and an experimental evaluation of compressive, one-dimensional, shock transmission through a threaded joint in a split Hopkinson bar configuration. Thread geometries were scaled to simulate large diameter threaded joints with loadings parallel to the axis of the threads. Both strain and acceleration were evaluated with experimental measurements and analysis. Analytical results confirm the experimental conclusions that in this split Hopkinson bar configuration, the change in the one-dimensional shock wave by the threaded joint is localized to a length equal to a few diameters` length beyond the threaded joint.

Hansen, N.R.; Bateman, V.I.; Brown, F.A.

1996-12-31

250

Temporomandibular joint reconstruction with total alloplastic joint replacement.  

PubMed

This paper is a preliminary paper which presents the early findings of an ongoing prospective trial on the use of the TMJ Concepts and Biomet Lorenz total joint replacement systems for the reconstruction of the temporomandibular joint (TMJ). Total alloplastic replacement of the TMJ has become a viable option for many people who suffer from TMJ disease where surgical reconstruction is indicated. Degenerative joint diseases such as osteoarthritis, rheumatoid arthritis, psoriatic arthritis, TMJ ankylosis, malunited condylar fractures and tumours can be successfully treated using this technique. There are a number of TMJ prostheses available. Two of the joint replacement products, which have been found to be most reliable and have FDA approval in the United States, are the TMJ Concepts system and the Biomet Lorenz system, and for this reason they are being investigated in this study. This study presents the findings of seven patients with a total of 12 joint replacements using either the TMJ Concepts system or the Biomet Lorenz joint system. Two patients (3 joints) had the TMJ Concepts system and five patients (9 joints) had the Biomet Lorenz system. Although still early, the results were generally pleasing, with the longest replacement having been in position for three years and the most recent six months. The average postoperative mouth opening was 29.7 mm (range 25-35 mm) with an average pain score of 1.7 (range 0-3, minimum score of 0 and maximum 10). Complications were minimal and related to sensory disturbance to the lip in one patient and joint dislocation in two patients. PMID:21332746

Jones, R H B

2011-03-01

251

General joint hypermobility and temporomandibular joint derangement in adolescents.  

PubMed Central

Joint mobility was assessed in each member of an epidemiological sample of 96 girls and 97 boys, 17 years old, and graded by means of the hypermobility score of Beighton et al. Twenty two per cent of the girls and 3% of the boys could perform five or more of the nine manoeuvres. The prevalence of symptoms and signs of internal derangement in the temporomandibular joint was higher in adolescents with hypermobility of joints (score greater than or equal to 5/9). In subjects with a high mobility score oral parafunctions (overuse) correlated more strongly with several signs and symptoms of craniomandibular disorder than in those with a low score.

Westling, L; Mattiasson, A

1992-01-01

252

Provocative sacroiliac joint maneuvers and sacroiliac joint block are unreliable for diagnosing sacroiliac joint pain  

Microsoft Academic Search

Mapping studies of pain elicited by injections into the sacroiliac joints (SIJs) suggest that sacroiliac joint syndrome (SIJS) may manifest as low back pain, sciatica, or trochanteric pain. Neither patient-reported symptoms nor provocative SIJ maneuvers are sensitive or specific for SIJS when SIJ block is used as the diagnostic gold standard. This has led to increasing diagnostic use of SIJ

Jean-Marie Berthelot; Jean-Jacques Labat; Benoît Le Goff; François Gouin; Yves Maugars

2006-01-01

253

22 CFR 228.34 - Joint ventures.  

Code of Federal Regulations, 2010 CFR

...Relations 1 2010-04-01 2010-04-01 false Joint ventures. 228.34 Section 228.34 Foreign Relations...Suppliers of Services for USAID Financing § 228.34 Joint ventures. A joint venture or unincorporated association...

2010-04-01

254

38 CFR 4.45 - The joints.  

Code of Federal Regulations, 2010 CFR

...extremities, the interphalangeal, metatarsal and tarsal joints of the lower extremities, the cervical vertebrae, the dorsal vertebrae, and the lumbar vertebrae, are considered groups of minor joints, ratable on a parity with major joints. The...

2009-07-01

255

Regenerative Medicine and Restoration of Joint Function.  

National Technical Information Service (NTIS)

Currently amputation, arthrodesis (joint fusion), or joint replacement are used to treat a joint with an intra-articular fracture or destroyed by a combat injury. Generation of personalized, anatomically shaped biological implants formed using techniques ...

E. Toyserkani M. Hurtig P. Zalzal R. Kandel R. Pilliar

2012-01-01

256

Metallurgy and Metallography of Braze Joints.  

National Technical Information Service (NTIS)

Metallographic examination of braze joints involves standard metallographic procedures with a need for special attention to some unique characteristics of braze joints. These unique characteristics include very thin joints and dissimilar metal combination...

M. M. McDonald

1985-01-01

257

Development of cryogenic rotatable heat transfer joints  

NASA Astrophysics Data System (ADS)

A summary of cryogenic rotatable heat transfer joint technology development, at Rockwell International Space Division, is presented. Starting with the flight qualified radiative joint on the RM-20B IR sensor of the early 70's, leading to rotatable heat pipe joint, gas conductive joints, rolling-contact-conductance joints, and the more recent work on development and evaluation of cryogenic rotatable seals and mechanical interfaces. Potential applications, joint design optimization, heat transfer, seal leakage and torque test data are presented.

Sadunas, J. A.; Backovsky, Z. F.; Wilson, D. E.

1992-07-01

258

Qualification of improved joint heaters  

NASA Technical Reports Server (NTRS)

Qualification testing of the Redesigned Solid Rocket Motor improved igniter-to-case joint and field joint heaters was conducted on the fired TEM-04 static test motor and was completed on 7 Sep. 1989. The purpose of the test was to certify the installation and performance of the improved joint heaters for use on flight motors. The changes incorporated in the improved heaters improve durability and should reduce handling damage. The igniter-to-case joint and field joint primary heater circuits were subjected to five 20-hr ON cycles. The heater redundant circuits were then subjected to one 20-hr ON cycle. Voltage, current, and temperature set point values were maintained within the specified limits for both heaters during each ON cycle. When testing was complete, both heaters were removed and inspected. No discolorations or any other anomalies were found on either of the heaters. Based on the successful completion of this test, it is recommended that the improved igniter-to-case joint and field joint heaters be used on future flight motors.

Cook, M.

1989-01-01

259

Common Bolted Joint Analysis Tool  

NASA Technical Reports Server (NTRS)

Common Bolted Joint Analysis Tool (comBAT) is an Excel/VB-based bolted joint analysis/optimization program that lays out a systematic foundation for an inexperienced or seasoned analyst to determine fastener size, material, and assembly torque for a given design. Analysts are able to perform numerous what-if scenarios within minutes to arrive at an optimal solution. The program evaluates input design parameters, performs joint assembly checks, and steps through numerous calculations to arrive at several key margins of safety for each member in a joint. It also checks for joint gapping, provides fatigue calculations, and generates joint diagrams for a visual reference. Optimum fastener size and material, as well as correct torque, can then be provided. Analysis methodology, equations, and guidelines are provided throughout the solution sequence so that this program does not become a "black box:" for the analyst. There are built-in databases that reduce the legwork required by the analyst. Each step is clearly identified and results are provided in number format, as well as color-coded spelled-out words to draw user attention. The three key features of the software are robust technical content, innovative and user friendly I/O, and a large database. The program addresses every aspect of bolted joint analysis and proves to be an instructional tool at the same time. It saves analysis time, has intelligent messaging features, and catches operator errors in real time.

Imtiaz, Kauser

2011-01-01

260

Rene 95 brazed joint metallurgical program  

NASA Technical Reports Server (NTRS)

This metallurgical program was specifically conducted for the establishment of material properties required for the design of the LF460 fan. The LF460 lift fan is an advanced 18:1 high thrust to weight single stage design. It has a turbine attached to the outer flowpath of the fan blade tip which minimizes the axial depth of the fan. Advanced lightweight attachment designs are employed in this concept to achieve minimum mass polar moments of inertia which are required for good aircraft flight response control. The design features which are unique to this advanced LF460 lift fan are the 0.010 inch thin Udimet 700 alloy integral tip turbine design, minimum weight braze attachment of the turbine to the fan blade, and the high strength and elevated temperature capability of the Rene'95 alloy for the fan blade. The data presented in this report show that the LF460 fan rotor design is feasible and that the design stresses and margins of safety were more than adequate. Prior to any production application, however, additional stress rupture/shear lap joints should be run in order to establish a firm 1200 F stress rupture curve for the CM50 braze metal.

Gay, C.; Givens, J.; Mastrorroco, S.; Sterman, A.

1972-01-01

261

[Cartilage joint transplantation (author's transl)].  

PubMed

The present day knowledge and the practical use of cartilage joint transplantation in the knee joint are reviewed. Apart from the refixation of cartilage-bone and pure cartilage fragments, autologous transplantation has not fulfilled the expectation anticipated from animal experiments. Apart from the question of the source of the graft, the final results depends primarily on the problems of the functional adjustment of the grafted cartilage in its new position and its nutrition. Homologous cartilagenous grafting can give extraordinarily good clinical results but they are not equal to those of a truely successful graft. In spite of this, future research in cartilage joint transplantation will be concentrated on homologous grafting. PMID:919841

Morscher, E

1977-01-01

262

DOUBLE CONTRAST VISUALIZATION OF JOINTS  

PubMed Central

Double contrast arthrography, a method in which a dye and then oxygen is injected, can be used to visualize pathologic changes in the knee joint, that otherwise cannot be recognized preoperatively. In 28 cases in which the procedure was carried out there was no evidence of damage owing to it. This method is worthy of consideration for visualization of conditions in the shoulder joint, hip, or any joint having a distensible cavity. ImagesFigure A.Figure B.Figure C.Figure D.Figure E.

Parker, Leon O.; DeLorimier, Alfred A.

1953-01-01

263

Management of limited joint mobility in diabetic patients.  

PubMed

Several rheumatologic manifestations are more pronounced in subjects with diabetes, ie, frozen shoulder, rotator cuff tears, Dupuytren's contracture, trigger finger, cheiroarthropathy in the upper limb, and Achilles tendinopathy and plantar fasciitis in the lower limb. These conditions can limit the range of motion of the affected joint, thereby impairing function and ability to perform activities of daily living. This review provides a short description of diabetes-related joint diseases, the specific pathogenetic mechanisms involved, and the role of inflammation, overuse, and genetics, each of which activates a complex sequence of biochemical alterations. Diabetes is a causative factor in tendon diseases and amplifies the damage induced by other agents as well. According to an accepted hypothesis, damaged joint tissue in diabetes is caused by an excess of advanced glycation end products, which forms covalent cross-links within collagen fibers and alters their structure and function. Moreover, they interact with a variety of cell surface receptors, activating a number of effects, including pro-oxidant and proinflammatory events. Adiposity and advanced age, commonly associated with type 2 diabetes mellitus, are further pathogenetic factors. Prevention and strict control of this metabolic disorder is essential, because it has been demonstrated that limited joint motion is related to duration of the disease and hyperglycemia. Several treatments are used in clinical practice, but their mechanisms of action are not completely understood, and their efficacy is also debated. PMID:23690694

Abate, Michele; Schiavone, Cosima; Salini, Vincenzo; Andia, Isabel

2013-01-01

264

Management of limited joint mobility in diabetic patients  

PubMed Central

Several rheumatologic manifestations are more pronounced in subjects with diabetes, ie, frozen shoulder, rotator cuff tears, Dupuytren’s contracture, trigger finger, cheiroarthropathy in the upper limb, and Achilles tendinopathy and plantar fasciitis in the lower limb. These conditions can limit the range of motion of the affected joint, thereby impairing function and ability to perform activities of daily living. This review provides a short description of diabetes-related joint diseases, the specific pathogenetic mechanisms involved, and the role of inflammation, overuse, and genetics, each of which activates a complex sequence of biochemical alterations. Diabetes is a causative factor in tendon diseases and amplifies the damage induced by other agents as well. According to an accepted hypothesis, damaged joint tissue in diabetes is caused by an excess of advanced glycation end products, which forms covalent cross-links within collagen fibers and alters their structure and function. Moreover, they interact with a variety of cell surface receptors, activating a number of effects, including pro-oxidant and proinflammatory events. Adiposity and advanced age, commonly associated with type 2 diabetes mellitus, are further pathogenetic factors. Prevention and strict control of this metabolic disorder is essential, because it has been demonstrated that limited joint motion is related to duration of the disease and hyperglycemia. Several treatments are used in clinical practice, but their mechanisms of action are not completely understood, and their efficacy is also debated.

Abate, Michele; Schiavone, Cosima; Salini, Vincenzo; Andia, Isabel

2013-01-01

265

15 CFR 295.25 - Special rule for the valuation of transfers between separately-owned joint venture members.  

Code of Federal Regulations, 2010 CFR

...TECHNOLOGY, DEPARTMENT OF COMMERCE NIST EXTRAMURAL PROGRAMS ADVANCED TECHNOLOGY PROGRAM Assistance to United States Industry-Led Joint Research and Development Ventures § 295.25 Special rule for the valuation of transfers between...

2011-01-01

266

15 CFR 295.25 - Special rule for the valuation of transfers between separately-owned joint venture members.  

Code of Federal Regulations, 2010 CFR

...TECHNOLOGY, DEPARTMENT OF COMMERCE NIST EXTRAMURAL PROGRAMS ADVANCED TECHNOLOGY PROGRAM Assistance to United States Industry-Led Joint Research and Development Ventures § 295.25 Special rule for the valuation of transfers between...

2010-01-01

267

15 CFR 295.25 - Special rule for the valuation of transfers between separately-owned joint venture members.  

Code of Federal Regulations, 2010 CFR

...TECHNOLOGY, DEPARTMENT OF COMMERCE NIST EXTRAMURAL PROGRAMS ADVANCED TECHNOLOGY PROGRAM Assistance to United States Industry-Led Joint Research and Development Ventures § 295.25 Special rule for the valuation of transfers between...

2009-01-01

268

Projection-based power allocation scheme for joint transmission system  

Microsoft Academic Search

Coordinated Multi-Point (CoMP) transmission or reception is an efficient way to reduce inter-cell interference, improve the spectrum efficiency and coverage in LTE-Advanced systems. Compared with other CoMP technologies, Joint Transmission (JT), which carries out precoding based on the channel information, can achieve better system performance gain. In this paper, a scheme termed the projection-based power allocation is proposed, which combines

Chunyan Yan; Ke Deng; Hui-Ming Wang

2011-01-01

269

Joint motion clusters in servomanipulator operation  

SciTech Connect

The Consolidated Fuel Reprocessing Program (CFRP) at the Oak Ridge National Laboratory is developing advanced teleoperator systems for maintenance of future nuclear fuel reprocessing facilities. Remote maintenance systems developed by the CFRP emphasize man-in-the-loop teleoperation. This paper reports the results of a recent experiment which investigated how users interact with a multi-degree-of-freedom servomanipulator. Principal components analysis performed on data collected during completion of typical remote maintenance tests indicates that joint motions may be summarized by two orthogonal clusters, one which represents fine-adjusting motions and one which represents slewing motions. Implications of these findings for servomanipulator design are discussed. 5 refs., 1 fig., 2 tabs.

Draper, J.V.; Sundstrom, E.; Herndon, J.N.

1986-01-01

270

Joint Technical Architecture - Air Force.  

National Technical Information Service (NTIS)

This Air Force instruction (AFI) implements Air Force Policy Directive (AFPD) 33-1, Command, Control, Communications, and Computer (C4) Systems. It mandates the Joint Technical Architecture - Air Force (JTA-AF) and describes implementation details, roles,...

2000-01-01

271

Joint Surveillance System Distributed Tracker.  

National Technical Information Service (NTIS)

The Joint Surveillance System Distributed Tracker (JDT) was designed by Hughes Aircraft Company for use in a laboratory environment in conjunction with Command and Control experiments in support of the air defense initiative. The tracker provides a live a...

R. Leckie T. P. Humiston

1990-01-01

272

Cluster Joint Science Operations Centre.  

National Technical Information Service (NTIS)

The role that the Cluster Joint Science Operations Center (JSOC) will play in the scientific operations of the Cluster mission is described. This includes the coordination of operations and commanding of the Cluster payload and the dissemination of scienc...

E. Dunford P. Vaughan E. Golton T. Dimbylow

1993-01-01

273

Joint state and parameter estimation  

NASA Technical Reports Server (NTRS)

Recent results are described concerning the problem of state reconstruction for a class of nonlinear distributed systems. The methods are then applied to the problem of joint state and parameter estimation. An example with the wave equation is presented.

Carmichael, N.; Quinn, M. D.

1983-01-01

274

Doctrine for Joint Civil Affairs.  

National Technical Information Service (NTIS)

This doctrine addresses the use of military civil affairs assets in planning and conducting joint CA activities across the range of military operations. Mission, policy determinants, and the relation of the government of the Country concerned to the Unite...

1995-01-01

275

Joint probabilities and quantum cognition  

NASA Astrophysics Data System (ADS)

In this paper we discuss the existence of joint probability distributions for quantumlike response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

de Barros, J. Acacio

2012-12-01

276

The abnormal proximal tibiofibular joint.  

PubMed

Abnormalities of the proximal tibiofibular joint are infrequently encountered. Mostly instability occurs as a result of trauma. Four types of instability are distinguished: subluxation, anterolateral, posteromedial and superior dislocation. Four radiological methods designed to visualize abnormalities of the proximal tibiofibular joint are discussed. Special notice is given to the clinical relevance of a new method. Instability was demonstrated in 19 patients; 16 of these were treated by an operation. History, data obtained by physical examination and ways of treatment are discussed. PMID:6703874

Veth, R P; Kingma, L M; Nielsen, H K

1984-01-01

277

Pyrothermal treatment of welded joints  

SciTech Connect

The results of investigation of the structure and distribution of residual stresses in welded joints in pipes after heat treatment, which includes heating of the surface being treated due to combustion of plates formed from a thermite-type material of pyrotechnic composition, placed around the perimeter of the welded joint, and also an assessment of the level of residual stresses prior to and after pyrotechnic treatment demonstrated the promising nature of the proposed method. 5 refs., 5 figs.

Serikov, S.V.; Idiyatullin, R.S.; Myakushkin, S.N.; Yaufman, V.V.

1992-03-01

278

[Temporomandibular joint pain: radiological diagnosis].  

PubMed

Pain in the temporomandibular joint is often the result of internal derangement, other causes are traumatic, functional or inflammatory processes. Conventional radiography is indicated in case of suspected trauma or for specialised preoperative measurements to plan the treatment of various facial dysplasias. MRI and CT should be used in the context with the results of clinical investigation and of axiography to differentiate the various functional and morphological abnormalities of this joint. PMID:11762260

Robinson, S; Peloschek, P; Schmid-Schwab, M; Piehslinger, E; Kainberger, F

2001-01-01

279

Differential diagnosis of pain around the hip joint.  

PubMed

The differential diagnosis of hip pain is broad and includes intra-articular pathology, extra-articular pathology, and mimickers, including the joints of the pelvic ring. With the current advancements in hip arthroscopy, more patients are being evaluated for hip pain. In recent years, our understanding of the functional anatomy around the hip has improved. In addition, because of advancements in magnetic resonance imaging, the diagnosis of soft tissue causes of hip pain has improved. All of these advances have broadened the differential diagnosis of pain around the hip joint and improved the treatment of these problems. In this review, we discuss the causes of intra-articular hip pain that can be addressed arthroscopically: labral tears, loose bodies, femoroacetabular impingement, capsular laxity, tears of the ligamentum teres, and chondral damage. Extra-articular diagnoses that can be managed arthroscopically are also discussed, including: iliopsoas tendonitis, "internal" snapping hip, "external" snapping hip, iliotibial band and greater trochanteric bursitis, and gluteal tendon injury. Finally, we discuss extra-articular causes of hip pain that are often managed nonoperatively or in an open fashion: femoral neck stress fracture, adductor strain, piriformis syndrome, sacroiliac joint pain, athletic pubalgia, "sports hernia," "Gilmore's groin," and osteitis pubis. PMID:19038713

Tibor, Lisa M; Sekiya, Jon K

2008-12-01

280

Genomic Advances to Improve Biomass for Biofuels  

ScienceCinema

Lawrence Berkeley National Lab bioscientist Daniel Rokhsar discusses genomic advances to improve biomass for biofuels. He presented his talk Feb. 11, 2008 in Berkeley, California as part of Berkeley Lab's community lecture series. Rokhsar works with the U.S. Department of Energy's Joint Genome Institute and Berkeley Lab's Genomics Division. His talk was presented February 11, 2008.

Daniel Rokhsar

2013-06-10

281

Genomic Advances to Improve Biomass for Biofuels  

ScienceCinema

Lawrence Berkeley National Lab bioscientist Daniel Rokhsar discusses genomic advances to improve biomass for biofuels. He presented his talk Feb. 11, 2008 in Berkeley, California as part of Berkeley Lab's community lecture series. Rokhsar works with the U.S. Department of Energy's Joint Genome Institute and Berkeley Lab's Genomics Division. His talk was presented February 11, 2008.

LBNL

2009-09-01

282

Genomic Advances to Improve Biomass for Biofuels  

ScienceCinema

Lawrence Berkeley National Lab bioscientist Daniel Rokhsar discusses genomic advances to improve biomass for biofuels. He presented his talk Feb. 11, 2008 in Berkeley, California as part of Berkeley Lab's community lecture series. Rokhsar works with the U.S. Department of Energy's Joint Genome Institute and Berkeley Lab's Genomics Division. His talk was presented February 11, 2008.

Daniel Rokhsar

2010-01-08

283

Genomic Advances to Improve Biomass for Biofuels  

SciTech Connect

Lawrence Berkeley National Lab bioscientist Daniel Rokhsar discusses genomic advances to improve biomass for biofuels. He presented his talk Feb. 11, 2008 in Berkeley, California as part of Berkeley Lab's community lecture series. Rokhsar works with the U.S. Department of Energy's Joint Genome Institute and Berkeley Lab's Genomics Division. His talk was presented February 11, 2008.

Daniel Rokhsar

2008-02-27

284

A revolute joint with linear load-displacement response for a deployable lidar telescope  

NASA Technical Reports Server (NTRS)

NASA Langley Research Center is developing concepts for an advanced spacecraft, called LidarTechSat, to demonstrate key structures and mechanisms technologies necessary to deploy a segmented telescope reflector. Achieving micron-accuracy deployment requires significant advancements in deployment mechanism design, such as the revolute joint presented herein. The joint exhibits load-cycling response that is essentially linear with less than 2% hysteresis, and the joint rotates with less than 7 mN-m (1 in-oz) of resistance. A prototype reflector metering truss incorporating the joint exhibits only a few microns of kinematic error under repected deployment and impulse loading. No other mechanically deployment structure found in the literature has been demonstrated to be this kinematically accurate.

Lake, Mark S.; Warren, Peter A.; Peterson, Lee D.

1996-01-01

285

A Reconfigurable Robot With Lockable Cylindrical Joints  

Microsoft Academic Search

This paper presents a new conceptual design for reconfigurable robots. Unlike conventional reconfigurable robots, our design does not achieve reconfigurability by utilizing modular joints. Rather, the robot is equipped with passive joints, i.e., joints without actuator or sensor, which permit changing the Denavit-Hartenberg (DH) parameters such as the link length and twist angle. The passive joints will become controllable when

Farhad Aghili; Kourosh Parsa

2009-01-01

286

Preloaded Composite-Strut/End-Fitting Joint  

NASA Technical Reports Server (NTRS)

Proposed structural joint between composite strut and metal end fitting strong and light in weight. Joint configured to distribute stresses fairly uniformly, with little interlaminar stress. Composite-strut/metal-fitting joint built up integrally with strut in layup process. Joint remains tight under reversals of loads and changes in temperature.

Monitor, Dean S.

1990-01-01

287

49 CFR 213.351 - Rail joints.  

Code of Federal Regulations, 2013 CFR

...Transportation 4 2013-10-01 2013-10-01 false Rail joints. 213.351 Section 213.351 Transportation...Operations at Track Classes 6 and Higher § 213.351 Rail joints. (a) Each rail joint, insulated joint, and compromise...

2013-10-01

288

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the second quarterly progress report for Year 2 of the ACTS project. It includes a review of progress made in Flow Loop development and research during the period of time between Oct 1, 2000 and December 31, 2000. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 2: Addition of a foam generation and breaker system), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 7): ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (d) Research project (Task 8): ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (e) Research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (g) Research on instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), and Foam properties while transporting cuttings. (Task 12), (h) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S). (i) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members. The tasks Completed During This Quarter are Task 7 and Task 8.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Barkim Demirdal; Affonso Lourenco; Evren Ozbayoglu; Paco Vieira; Lei Zhou

2000-01-30

289

Advanced servo manipulator  

DOEpatents

An advanced servo manipulator has modular parts. Modular motor members drive individual input gears to control shoulder roll, shoulder pitch, elbow pitch, wrist yaw, wrist pitch, wrist roll, and tong spacing. The modules include a support member, a shoulder module for controlling shoulder roll, and a sleeve module attached to the shoulder module in fixed relation thereto. The shoulder roll sleeve module has an inner cylindrical member rotatable relative to the outer cylindrical member, and upon which a gear pod assembly is mounted. A plurality of shafts are driven by the gears, which are in turn driven by individual motor modules to transmit rotary power to control elbow pitch as well as to provide four different rotary shafts across the bendable elbow joint to supply rotary motive power to a wrist member and tong member. 41 figs.

Holt, W.E.; Kuban, D.P.; Martin, H.L.

1988-10-25

290

Advanced servo manipulator  

SciTech Connect

An advanced servo manipulator has modular parts. Modular motor members drive individual input gears to control shoulder roll, shoulder pitch, elbow pitch, wrist yaw, wrist pitch, wrist roll, and tong spacing. The modules include a support member, a shoulder module for controlling shoulder roll, and a sleeve module attached to the shoulder module in fixed relation thereto. The shoulder roll sleeve module has an inner cylindrical member rotatable relative to the outer cylindrical member, and upon which a gear pod assembly is mounted. A plurality of shafts are driven by the gears, which are in turn driven by individual motor modules to transmit rotary power to control elbow pitch as well as to provide four different rotary shafts across the bendable elbow joint to supply rotary motive power to a wrist member and tong member.

Holt, William E. (Knoxville, TN); Kuban, Daniel P. (Oak Ridge, TN); Martin, H. Lee (Knoxville, TN)

1988-01-01

291

Advances in treating psoriasis.  

PubMed

Psoriasis is a T helper (Th)17/Th1-mediated autoimmune disease affecting the skin and joints. So far, distinct traditional oral compounds and modern biologics have been approved in most countries for the treatment of patients with moderate to severe psoriasis or psoriatic arthritis. Yet, the anti-psoriatic therapeutic spectrum is to be extended by a number of novel targeted therapies including biologics and modern oral compounds. The next set of anti-psoriatic biologics targets mainly Th17-associated cytokines such as IL-17 or IL-23. In contrast, modern oral anti-psoriatics, such as dimethyl fumarate (DMF), apremilast or Janus kinase (JAK) inhibitors interfere with intracellular proteins and affect signaling pathways. Here we summarize the current systemic therapies for psoriasis and their immunological mechanism. The recent advances in psoriasis therapy will help treat our patients efficiently and complete our understanding of disease pathogenesis. PMID:24592316

Belge, Katharina; Brück, Jürgen; Ghoreschi, Kamran

2014-01-01

292

Advances in treating psoriasis  

PubMed Central

Psoriasis is a T helper (Th)17/Th1-mediated autoimmune disease affecting the skin and joints. So far, distinct traditional oral compounds and modern biologics have been approved in most countries for the treatment of patients with moderate to severe psoriasis or psoriatic arthritis. Yet, the anti-psoriatic therapeutic spectrum is to be extended by a number of novel targeted therapies including biologics and modern oral compounds. The next set of anti-psoriatic biologics targets mainly Th17-associated cytokines such as IL-17 or IL-23. In contrast, modern oral anti-psoriatics, such as dimethyl fumarate (DMF), apremilast or Janus kinase (JAK) inhibitors interfere with intracellular proteins and affect signaling pathways. Here we summarize the current systemic therapies for psoriasis and their immunological mechanism. The recent advances in psoriasis therapy will help treat our patients efficiently and complete our understanding of disease pathogenesis.

Belge, Katharina; Bruck, Jurgen

2014-01-01

293

JANNAF 35th Combustion Subcommittee and 17th Propulsion Systems Hazards Subcommittee Meeting: Joint Sessions  

NASA Technical Reports Server (NTRS)

This publication is a compilation of 15 unclassified/unlimited technical papers presented at the 1998 meeting of the Joint Army-Navy-NASA-Air Force (JANNAF) Combustion Subcommittee (CS) and Propulsion Systems Hazards Subcommittee (PSHS) held jointly with the Airbreathing Propulsion Subcommittee (APS). The meeting was held on 7 - 11 December 1 998 at Raytheon Systems Company and the Marriott Hotel, Tucson, AZ. Topics covered include advanced ingredients and reaction kinetics in solid propellants and experimental diagnostic techniques.

Fry, Ronald S. (Editor); Gannaway, Mary T. (Editor); Rognan, Melanie (Editor)

1998-01-01

294

Test and analysis of Celion 3000/PMR-15, graphite/polyimide bonded composite joints: Data report  

NASA Technical Reports Server (NTRS)

Standard single lap, double lap and symmetric step lap bonded joints of Celion 3000/PMR-15 graphite/polyimide composite were evaluated. Composite to composite and composite to titanium joints were tested at 116 K (-250 F), 294 K (70 F) and 561 K (550 F). Joint parameters evaluated are lap length, adherend thickness, adherend axial stiffness, lamina stacking sequence and adherend tapering. Advanced joint concepts were examined to establish the change in performance of preformed adherends, scalloped adherends and hybrid systems. The material properties of the high temperature adhesive, designated A7F, used for bonding were established. The bonded joint tests resulted in interlaminar shear or peel failures of the composite and there were very few adhesive failures. Average test results agree with expected performance trends for the various test parameters. Results of finite element analyses and of test/analysis correlations are also presented.

Cushman, J. B.; Mccleskey, S. F.; Ward, S. H.

1982-01-01

295

Elasto-Plastic Analysis of Tee Joints Using HOT-SMAC  

NASA Technical Reports Server (NTRS)

The Higher Order Theory - Structural/Micro Analysis Code (HOT-SMAC) software package is applied to analyze the linearly elastic and elasto-plastic response of adhesively bonded tee joints. Joints of this type are finding an increasing number of applications with the increased use of composite materials within advanced aerospace vehicles, and improved tools for the design and analysis of these joints are needed. The linearly elastic results of the code are validated vs. finite element analysis results from the literature under different loading and boundary conditions, and new results are generated to investigate the inelastic behavior of the tee joint. The comparison with the finite element results indicates that HOT-SMAC is an efficient and accurate alternative to the finite element method and has a great deal of potential as an analysis tool for a wide range of bonded joints.

Arnold, Steve M. (Technical Monitor); Bednarcyk, Brett A.; Yarrington, Phillip W.

2004-01-01

296

Management of acromioclavicular joint injuries.  

PubMed

Acromioclavicular joint injuries are among the most common shoulder girdle injuries in athletes and most commonly result from a direct force to the acromion with the arm in an adducted position. Acromioclavicular joint injuries often present with associated injuries to the glenohumeral joint, including an increased incidence of superior labrum anterior posterior (SLAP) tears that may warrant further evaluation and treatment. Anteroposterior stability of the acromioclavicular joint is conferred by the capsule and acromioclavicular ligaments, of which the posterior and superior ligaments are the strongest. Superior-inferior stability is maintained by the coracoclavicular (conoid and trapezoid) ligaments. Type-I or type-II acromioclavicular joint injuries have been treated with sling immobilization, early shoulder motion, and physical therapy, with favorable outcomes. Return to activity can occur when normal shoulder motion and strength are obtained and the shoulder is asymptomatic as compared with the contralateral normal extremity. The management of type-III injuries remains controversial and is individualized. While a return to the previous level of functional activity with nonsurgical treatment has been documented in a number of case series, surgical reduction and coracoclavicular ligament reconstruction has been associated with a favorable outcome and can be considered in patients who place high functional demands on their shoulders or in athletes who participate in overhead sports. Surgical management is indicated for high-grade (?type IV) acromioclavicular joint injuries to achieve anatomic reduction of the acromioclavicular joint, reconstruction of the coracoclavicular ligaments, and repair of the deltotrapezial fascia. Outcomes after surgical reconstruction of the coracoclavicular ligaments have been satisfactory with regard to achieving pain relief and return to functional activities, but further improvements in the biomechanical strength of these constructs are necessary to avoid loss of reduction and creep with cyclic loading. PMID:24382728

Li, Xinning; Ma, Richard; Bedi, Asheesh; Dines, David M; Altchek, David W; Dines, Joshua S

2014-01-01

297

Load transfer in composite bolted joints  

NASA Technical Reports Server (NTRS)

The study deals with composite bolted joints, specifically those required to transmit primary loads. Consideration is given to the ultimate load capacity of quasi-isotropic bolted joint specimens as a function of the width of the joint, the diameter of the bolt, the joint thickness, and the number of bolts. Emphasis is placed on the effect of adding a second bolt, in tandem, on the load capacity of the joint.

Hyer, M. W.; Perry, J. C.; Lightfoot, M. C.

1980-01-01

298

Prosthetic Joint Infections in Elderly Patients  

Microsoft Academic Search

Although prosthetic joint infections (PJIs) occur in a small proportion of patients following total joint arthroplasty, they\\u000a have catastrophic consequences on morbidity and joint function and carry a high economic burden in the elderly patients.\\u000a \\u000a Clinical presentation of prosthetic joint infection is highly variable, and differentiating a painful joint arthroplasty secondary\\u000a to mechanical loosening from an indolent infection can be

Camelia E Marculescu; Elie F. Berbari; Douglas R. Osmon

299

Comparison of different methods of temporomandibular joint disc reconstruction--an animal model.  

PubMed

The optimum method of temporomandibular joint (TMJ) reconstruction has not been defined despite numerous surgical treatments and several well controlled clinical trials. Animal models offer an experimental method allowing direct comparison of standardized surgical techniques. Advanced osteoarthrosis was induced bilaterally in 12 mature merino sheep. Three months alter unilateral surgical reconstruction was performed. Four sheep had discectomy alone, four discectomy with fresh TMJ disc grafts, and four discectomy with fresh auricular grafts. All three surgical methods resulted in some reversal and repair of the osteoarthritic process, with the best result being from the auricular graft, next discectomy alone, next the disc graft, with the untreated osteoarthritic joint showing the most advanced pathosis. This study supports the role of surgical reconstruction in advanced degenerative disease of the temporomandibular joint, in particular, auricular graft reconstruction. PMID:9153841

Ogi, N; Ishimaru, J; Kurita, K; Handa, Y; Jones, R H; Goss, A N

1997-04-01

300

Advanced Microsensors  

NASA Technical Reports Server (NTRS)

This video looks at a spinoff application of the technology from advanced microsensors -- those that monitor and determine conditions of spacecraft like the Space Shuttle. The application featured is concerned with the monitoring of the health of premature babies.

1991-01-01

301

Advance Directives  

Cancer.gov

A fact sheet about advance directives, which are legal documents that allow people to communicate their decisions about medical care to family, friends, and health care professionals in the event that they are unable to make those decisions themselves.

302

SPORE Advances  

Cancer.gov

SPORE Advances  April 1 – June 30, 2009  Translational Research Program, DCTD, NCI  BRAIN ______________________________________________________________________________________________ 6  University of California, San Francisco _____________________________________________________________ 6  Berger, Mitchel S., M.D. 

303

Advanced Capacitors.  

National Technical Information Service (NTIS)

This report describes an experimental program to develop and test advanced dielectric materials for capacitors for airborne power systems. Five classes of capacitors were considered: high rep rate and low rep rate pulse capacitors for use in pulse-forming...

J. B. Ennis R. S. Buritz

1984-01-01

304

Advanced Manufacturing.  

National Technical Information Service (NTIS)

The Advanced Manufacturing Industry Study visited a wide range of manufacturing firms and met with domestic and foreign industry leaders from academic institutions, research and development organizations and various trade and labor associations. This pape...

O. A. Ketbi A. Azaizeh W. Carrico R. Cook D. Cooke

2002-01-01

305

Analysis of selected compression splice joint locations in a graphite-epoxy transport wing stub box  

NASA Technical Reports Server (NTRS)

Three critical compression splice joint locations in a stitched graphite-epoxy transport wing stub box have been analyzed to determine their expected structural performance. The wing box is representative of a section of a commercial transport wing box and was designed and constructed by McDonnell Douglas Aerospace Company as part of the NASA Advanced Composites Technology (ACT) program. The results of the finite element analyses of the splice joints are presented. The analysis results indicate that failure will not occur in the splice joint regions for loads less than the Design Ultimate Load of the wing box.

Jegley, Dawn C.

1995-01-01

306

Strength evaluation of socket joints  

NASA Technical Reports Server (NTRS)

This report documents the development of a set of equations that can be used to provide a relatively simple solution for identifying the strength of socket joints and for most cases avoid the need of more lengthy analyses. The analytical approach was verified by comparison of the contact load distributions to results obtained from a finite element analysis. The contacting surfaces for the specific joint in this analysis are in the shape of frustrums of a cone and are representative of the tapered surfaces in the socket-type joints used to join segments of model support systems for wind tunnels. The results are in the form of equations that can be used to determine the contact loads and stresses in the joint from the given geometry and externally applied loads. Equations were determined to define the bending moments and stresses along the length of the joints based on strength and materials principles. The results have also been programmed for a personal computer and a copy of the program is included.

Rash, Larry C.

1994-01-01

307

Challenges and Opportunities in Design, Fabrication, and Testing of High Temperature Joints in Ceramics and Ceramic Composites  

NASA Technical Reports Server (NTRS)

Ceramic joining has been recognized as an enabling technology for successful utilization of advanced ceramics and composite materials. A number of joint design and testing issues have been discussed for ceramic joints in silicon carbide-based ceramics and fiber-reinforced composites. These joints have been fabricated using an affordable, robust ceramic joining technology (ARCJoinT). The microstructure and good high temperature mechanical capability (compressive and flexural strengths) of ceramic joints in silicon carbide-based ceramics and composite materials are reported.

Singh, M.; Levine, S. R. (Technical Monitor)

2001-01-01

308

Experimental Joint Immobilization in Guinea Pigs. Effects on the Knee Joint.  

National Technical Information Service (NTIS)

In young and adult guinea pigs, the aftermath experimentally induced by the immobilization of the knee joint in hyperextended forced position was studied. Joint immobilization which varied from one to nine weeks was attained by plaster. Eighty knee joints...

J. P. Marcondesdesouza F. F. Machado A. Sesso V. Valeri

1980-01-01

309

Weapons Innovation and Joint System Development: A Case Study of the Joint STARS Program.  

National Technical Information Service (NTIS)

The Joint Surveillance Target Attack Radar System (Joint STARS) is an airborne system developed jointly by the Army and Air Force to provide real-time battlefield surveillance of stationary and moving ground targets. The developmental system made its debu...

S. W. Hill

1997-01-01

310

[Divorce and joint physical custody].  

PubMed

This work first recalls the definition of joint physical custody, as well as the current legal procedure for obtaining it, its practical implementation, the financial implications for parents, and finally some statistics. Some psychological and psychopathological reflections on the impact of divorce on children are then presented before considering the question of joint physically custody with regard to attachment theory and depending on the age of the child (a great caution seems to be required before three years). The article concludes with a brief discussion of parental alienation syndrome. PMID:24630624

Golse, B

2014-04-01

311

End effects in scarf joints  

NASA Technical Reports Server (NTRS)

Scarf joints with small scarf angles are especially sensitive to stiffness mismatch between adherends and to adherend tip bluntness. Pre-assembly breakage of an adherend tip where it is only a few microns thick can cause significant reduction in joint strength. Mathematically, the reason for such sensitivity is that the solutions to the governing differential equation develop boundary layer character when the scarf angles are small. The boundary layers are regions with large adhesive stresses. Experimental strength data for laminated composite adherends agree with the results of this analysis.

Adkins, D. W.; Pipes, R. B.

1985-01-01

312

Solder Joint Health Monitoring Testbed  

NASA Technical Reports Server (NTRS)

A method of monitoring the health of selected solder joints, called SJ-BIST, has been developed by Ridgetop Group Inc. under a Small Business Innovative Research (SBIR) contract. The primary goal of this research program is to test and validate this method in a flight environment using realistically seeded faults in selected solder joints. An additional objective is to gather environmental data for future development of physics-based and data-driven prognostics algorithms. A test board is being designed using a Xilinx FPGA. These boards will be tested both in flight and on the ground using a shaker table and an altitude chamber.

Delaney, Michael M.; Flynn, James G.; Browder, Mark E.

2009-01-01

313

Shear strength of beam–column joint with enlarged joint area  

Microsoft Academic Search

This paper presents planar joint enlargement for increasing the shear strength of sub-standard beam–column joint. Five beam–column specimens were tested under quasi-static cyclic loads. Two control specimens were tested. One was the beam–column joint without joint enlargement and the other was the beam–column joint strengthened by monolithically cast square enlargement. The other three specimens were strengthened by joint enlargements with

Amorn Pimanmas; Preeda Chaimahawan

2010-01-01

314

Development of a Computer-Aided Cognitive Systems Engineering Tool to Facilitate the Design of Advanced Decision Support Systems.  

National Technical Information Service (NTIS)

The Computer-Assisted Cognitive Systems Engineering (CACSE) toolkit provides a methodology and associated software to facilitate the use of human factors/warfighter operational performance requirements data in the design of complex man-machine systems, su...

S. S. Potter, W. C. Elm, E. M. Roth, D. D. Woods

2001-01-01

315

Flexible joints for thrust vector control  

NASA Technical Reports Server (NTRS)

Flexible joints have been used to achieve thrust vector control over a wide range of sizes of nozzles and have been demonstrated successfully in bench tests and static firings, and are operational on two motors. From these many joints the problems of flexible joints have been defined as establishment of the movable nozzle envelope, definition of the actuation power requirements, definition of the mechanical properties of joint materials, adhesive bonding, test methods, and quality control. These data and problem solutions are contained in a large number of reports. Data relating to joint configuration, design requirements, materials selection, joint design, structural analysis, manufacture, and testing are summarized.

Woodberry, R. F. H.

1975-01-01

316

Fatigue in mechanically fastened composite and metallic joints; Proceedings of the Symposium, Charleston, SC, Mar. 18, 19, 1985  

SciTech Connect

The present conference considers advanced fastener technology for composite and metallic joints, a fatigue life-enhancing and high interference bushing installation employing the 'ForceMate' technique, fatigue life improvement by cold working fastener holes in 7050 aluminum alloy, the fatigue strength of bolted and adhesively bonded structural steel joints, and the effect of load transfer on the fatigue of mechanically fastened metallic joints. Also discussed are the evaluation of a stochastic initial fatigue quality model for fastener holes, the experimental characterization of cracks at open holes and in rounded-end straight attachment lugs, the fatigue of riveted metallic joints, an enhanced stop-drill repair procedure for cracked structures, the influence of fastener flexibility on load transfer and fatigue life prediction in multiple row joints, the strength and lifetime of bolted laminates, and the fatigue of bolted continuous-fiber/sheet-molding-compound composite-metal joints.

Potter, J.M.

1986-01-01

317

[Arthroscopy of the elbow joint].  

PubMed

A series of 31 patients who had elbow arthroscopy has been reviewed. Good results have been achieved after removal of loose bodies or post-traumatic hematoma. A danger of injury to periarticular structures due to the use of arthroscopic instruments, especially with pathologically decreased joint volume has been pointed out. PMID:9026412

Pawlas, R; Kio?basa, T; Chrobok, A

1996-01-01

318

Trends in biological joint resurfacing  

PubMed Central

The treatment of osteochondral lesions and osteoarthritis remains an ongoing clinical challenge in orthopaedics. This review examines the current research in the fields of cartilage regeneration, osteochondral defect treatment, and biological joint resurfacing, and reports on the results of clinical and pre-clinical studies. We also report on novel treatment strategies and discuss their potential promise or pitfalls. Current focus involves the use of a scaffold providing mechanical support with the addition of chondrocytes or mesenchymal stem cells (MSCs), or the use of cell homing to differentiate the organism’s own endogenous cell sources into cartilage. This method is usually performed with scaffolds that have been coated with a chemotactic agent or with structures that support the sustained release of growth factors or other chondroinductive agents. We also discuss unique methods and designs for cell homing and scaffold production, and improvements in biological joint resurfacing. There have been a number of exciting new studies and techniques developed that aim to repair or restore osteochondral lesions and to treat larger defects or the entire articular surface. The concept of a biological total joint replacement appears to have much potential. Cite this article: Bone Joint Res 2013;2:193–9.

Myers, K. R.; Sgaglione, N. A.; Grande, D. A.

2013-01-01

319

Preparation of soft solder joints  

Microsoft Academic Search

The preparation of solder joints in electronic applications is not easy because the solder is soft and often surrounded by hard and brittle materials. Smearing, scratching, and structural changes caused by the preparation as well as destruction of the specimens during preparation due to their filigree geometries make the procedure demanding. A sequence has been developed that enables the preparation

Günter Grossmann; Giovanni Nicoletti

1996-01-01

320

Tube Joint Leak Repair Coupling.  

National Technical Information Service (NTIS)

The coupling device consists of two split seals, one male split nut, one female split nut, and two alining pins. Each split nut is a two-piece section or two half-shell sections which are held together by a dove-tail joint and an alining pin. The male spl...

1968-01-01

321

Solders in Real Electronic Joints  

NASA Astrophysics Data System (ADS)

Undercooling and recalescence were studied using the differential scanning calorimetry (DSC) method on real electronic systems. Two solder pastes, Sn62.5Pb36.5Ag1 and Sn96.5Ag3Cu0.5, were used for preparation of electronic joints. Various combinations of these solders and soldering pads with different surface finishes such as Cu, Cu-Ni-Au, Cu-Sn, and Cu-Sn99Cu1 were used. During melting of both pastes, the Sn and Sn99Cu1 surface finishes immediately dissolved in the solder and the Cu surface coating was exposed to the melt. Therefore, practically the same undercooling was found for the Cu, Cu-Sn, and Cu-Sn99Cu1 coatings. The lowest undercooling was found for the Cu-Ni-Au surface finish for both solder pastes. If two separated electronic joints were made on the sample, two separate peaks were found in the DSC signal during solidification. In the sample with only one joint, only one exothermic peak was found. These findings were observed for all paste/surface finish combinations. These data were analyzed, showing that this effect is a consequence of undercooling and recalescence: Latent heat released during solidification of the joint increases the surrounding temperature and influences all the processes taking place.

Rudajevová, A.; Dušek, K.

2014-07-01

322

Cryopumping field joint can testing  

NASA Astrophysics Data System (ADS)

For long installations, vacuum jacketed piping often comes in 40 foot sections that are butt welded together in the field. A short can is then welded over the bare pipe connection to allow for insulation to be protected from the environment. Traditionally, the field joint is insulated with multilayer insulation and a vacuum is pulled on the can to minimize heat leak through the bare section and prevent frost from forming on the pipe section. The vacuum jacketed lines for the Ares I mobile launch platform were to be a combined 2000 feet long, with 60+ pipe sections and field joint cans. Historically, Kennedy Space Center has drilled a hole in the long sections to create a common vacuum with the field joint can to minimize maintenance on the vacuum jacketed piping. However, this effort looked at ways to use a passive system that didn't require a vacuum, but may cryopump to create its own vacuum. Various forms of aerogel, multilayer insulations, and combinations thereof were tested to determine the best method of insulating the field joint while minimizing maintenance and thermal losses.

Johnson, Wesley; Fesmire, James; Meneghelli, Barry

2012-06-01

323

Cryopumping Field Joint Can Testing  

NASA Technical Reports Server (NTRS)

For long installations, vacuum jacketed piping often comes in 40 foot sections that are butt welded together in the field. A short can is then welded over the bare pipe connection to allow for insulation to be protected from the environment. Traditionally, the field joint is insulated with multilayer insulation and a vacuum is pulled on the can to minimize heat leak through the bare section and prevent frost from forming on the pipe section. The vacuum jacketed lines for the Ares I mobile launch platform were to be a combined 2000 feet long, with 60+ pipe sections and field joint cans. Historically, Kennedy Space Center has drilled a hole in the long sections to create a common vacuum with the field joint can to minimize maintenance on the vacuum jacketed piping. However, this effort looked at ways to use a passive system that didn't require a vacuum, but may cryopump to create its own vacuum. Various forms of aerogel, multilayer insulations, and combinations thereof were tested to determine the best method of insulating the field joint while minimizing maintenance and thermal losses.

Johnson, Wesley L.; Fesmire, James E.; Meneghelli, Barry E.

2011-01-01

324

Nonoperative treatment ofacromioclavicular joint injuries  

Microsoft Academic Search

Nonoperative treatment is generally the choice for Type I and II acromioclavicular (AC) joint injuries. The situation issomewhat more controversial when Type III AC dislocations are considered, particularly with respect to athletes and heavy laborers. A number of recent studies have supported conservative treatment in these groups. There is general consensus as to the need for surgical intervention for Type

James N. Gladstone; Kevin E. Wilk; James R. Andrews

1997-01-01

325

[Arthrodesis of the talonavicular joint].  

PubMed

The talonavicular joint as part of the coxa pedis plays a pivotal role in the overall motion of the foot. The necessity for talonavicular fusion arises from isolated arthritis of posttraumatic, rheumatoid, degenerative, or idiopathic etiology. Posttraumatic arthritis is seen after malunited mid-tarsal (Chopart) fracture-dislocations and is frequently accompanied by malalignment due to an imbalance between the medial and lateral columns of the foot. In these cases a corrective arthrodesis becomes necessary. In cases of poor bone stock or arthritis of the calcaneocuboid joint, a double arthrodesis is preferred over isolated talonavicular fusion. Fusion with mini-plates is biomechanically superior to fusion with screws and especially staples, the latter being associated with non-union rates of up to 37%. Talonavicular fusion allows reproducible pain reduction in isolated arthritis with subjective patient satisfaction of between 86% and 100% in a literature review. The substantial reduction of movement in the triple joint complex leads to overload of the adjacent joints with development of arthritis in about 30% in the medium term. PMID:16193344

Rammelt, S; Marti, R K; Zwipp, H

2006-04-01

326

Automatic Locking Knee Brace Joint.  

National Technical Information Service (NTIS)

This invention is an apparatus for controlling the pivotal movement of a knee brace comprising a tang-and-clevis joint that has been uniquely modified. Both the tang and the clevis have a set of teeth that, when engaged, can lock the tang and the clevis t...

B. Weddendorf

1995-01-01

327

Jointly Sponsored Research Program Energy Related Research  

SciTech Connect

Cooperative Agreement, DE-FC26-98FT40323, Jointly Sponsored Research (JSR) Program at Western Research Institute (WRI) began in 1998. Over the course of the Program, a total of seventy-seven tasks were proposed utilizing a total of $23,202,579 in USDOE funds. Against this funding, cosponsors committed $26,557,649 in private funds to produce a program valued at $49,760,228. The goal of the Jointly Sponsored Research Program was to develop or assist in the development of innovative technology solutions that will: (1) Increase the production of United States energy resources - coal, natural gas, oil, and renewable energy resources; (2) Enhance the competitiveness of United States energy technologies in international markets and assist in technology transfer; (3) Reduce the nation's dependence on foreign energy supplies and strengthen both the United States and regional economies; and (4) Minimize environmental impacts of energy production and utilization. Under the JSR Program, energy-related tasks emphasized enhanced oil recovery, heavy oil upgrading and characterization, coal beneficiation and upgrading, coal combustion systems development including oxy-combustion, emissions monitoring and abatement, coal gasification technologies including gas clean-up and conditioning, hydrogen and liquid fuels production, coal-bed methane recovery, and the development of technologies for the utilization of renewable energy resources. Environmental-related activities emphasized cleaning contaminated soils and waters, processing of oily wastes, mitigating acid mine drainage, and demonstrating uses for solid waste from clean coal technologies, and other advanced coal-based systems. Technology enhancement activities included resource characterization studies, development of improved methods, monitors and sensors. In general the goals of the tasks proposed were to enhance competitiveness of U.S. technology, increase production of domestic resources, and reduce environmental impacts associated with energy production and utilization. This report summarizes the accomplishments of the JSR Program.

Western Research Institute

2009-03-31

328

The Advanced Solid Rocket Motor  

NASA Technical Reports Server (NTRS)

The paper describes the Advanced Solid Rocket Motor (ASRM) that is being developed to replace, in 1997, the Redesigned Solid Rocket Motor which currently boosts the Space Shuttle. The ASRM will contain features to improve motor safety (fewer potential leak paths, improved seal materials, stronger case material, and fewer nozzle and case joints), an improved ignition system using through-bulkhead initiators, and highly reproducible manufacturing and inspection techniques with a large number of automated procedures. The ASRM will be able to deliver 12,000 lbs greater payloads to any given orbit of the Shuttle. There are also environmental improvements, realized by waste propellant recovery.

Mitchell, Royce E.

1992-01-01

329

Upper limb joint kinetic analysis during tennis serve: Assessment of competitive level on efficiency and injury risks.  

PubMed

The aim of this work was to compare the joint kinetics and stroke production efficiency for the shoulder, elbow, and wrist during the serve between professionals and advanced tennis players and to discuss their potential relationship with given overuse injuries. Eleven professional and seven advanced tennis players were studied with an optoelectronic motion analysis system while performing serves. Normalized peak kinetic values of the shoulder, elbow, and wrist joints were calculated using inverse dynamics. To measure serve efficiency, all normalized peak kinetic values were divided by ball velocity. t-tests were used to determine significant differences between the resultant joint kinetics and efficiency values in both groups (advanced vs professional). Shoulder inferior force, shoulder anterior force, shoulder horizontal abduction torque, and elbow medial force were significantly higher in advanced players. Professional players were more efficient than advanced players, as they maximize ball velocity with lower joint kinetics. Since advanced players are subjected to higher joint kinetics, the results suggest that they appeared more susceptible to high risk of shoulder and elbow injuries than professionals, especially during the cocking and deceleration phases of the serve. PMID:23293868

Martin, C; Bideau, B; Ropars, M; Delamarche, P; Kulpa, R

2013-01-01

330

Advanced rotorcraft transmission program  

NASA Technical Reports Server (NTRS)

The Advanced Rotorcraft Transmission (ART) program is an Army-funded, joint Army/NASA program to develop and demonstrate lightweight, quiet, durable drivetrain systems for next generation rotorcraft. ART addresses the drivetrain requirements of two distinct next generation aircraft classes: Future Air Attack Vehicle, a 10,000 to 20,000 lb. aircraft capable of undertaking tactical support and air-to-air missions; and Advanced Cargo Aircraft, a 60,000 to 80,000 lb. aircraft capable of heavy life field support operations. Both tiltrotor and more conventional helicopter configurations are included in the ART program. Specific objectives of ART include reduction of drivetrain weight by 25 percent compared to baseline state-of-the-art drive systems configured and sized for the next generation aircraft, reduction of noise level at the transmission source by 10 dB relative to a suitably sized and configured baseline, and attainment of at least a 5000 hr mean-time-between-removal. The technical approach for achieving the ART goals includes application of the latest available component, material, and lubrication technology to advanced concept drivetrains that utilize new ideas in gear configuration, transmission layout, and airframe/drivetrain integration. To date, candidate drivetrain systems were carried to a conceptual design stage, and tradeoff studies were conducted resulting in selection of an ART transmission configuration for each of the four contractors. The final selection was based on comparative weight, noise, and reliability studies. A description of each of the selected ART designs is included. Preliminary design of each of the four selected ART transmission was completed, as have mission impact studies wherein comparisons of aircraft mission performance and life cycle costs are undertaken for the next generation aircraft with ART and with the baseline transmission.

Bill, Robert C.

1990-01-01

331

Technological Advancements  

ERIC Educational Resources Information Center

The influx of technology has brought significant improvements to school facilities. Many of those advancements can be found in classrooms, but when students head down the hall to use the washrooms, they are likely to find a host of technological innovations that have improved conditions in that part of the building. This article describes modern…

Kennedy, Mike

2010-01-01

332

Technical status of the Dish/Stirling Joint Venture Program  

NASA Astrophysics Data System (ADS)

Initiated in 1991; the Dish/Stirling Joint Venture Program (DSJVP) is a 5-year, $17.2 million joint venture which is funded by Cummins Power Generation, Inc. (CPG) of Columbus, Indiana and the United States Department of Energy's (DOE) Solar Thermal and Biomass Power Division. Sandia National Laboratories administers and provides technical management for this contract on the DOE's behalf. In January, 1995; CPG advanced to Phase 3 of this three-phase contract. The objective of the DSJVP is to develop and commercialize a 7-kW. Dish/Stirling System for remote power markets by 1997. In this paper, the technical status of the major subsystems which comprise the CPG 7-kW(sub e) Dish/Stirling System is presented. These subsystems include the solar concentrator, heat pipe receiver, engine/alternator, power conditioning, and automatic controls.

Bean, John R.; Diver, Richard B.

333

Consequences of expansion joint bellows rupture.  

National Technical Information Service (NTIS)

Expansion joints are used in piping systems to accommodate pipe deflections during service and to facilitate fitup. Typically, the expansion joint bellows is the thinnest part of the pressure boundary, bellows rupture frequencies are typically several ord...

W. L. Daugherty R. F. Miller D. S. Cramer

1992-01-01

334

14 CFR 23.693 - Joints.  

Code of Federal Regulations, 2010 CFR

...COMMUTER CATEGORY AIRPLANES Design and Construction Control Systems § 23.693 Joints. Control system joints (in push-pull systems) that are subject to angular motion, except those in ball and roller bearing systems, must have a special...

2010-01-01

335

14 CFR 25.693 - Joints.  

Code of Federal Regulations, 2010 CFR

...TRANSPORT CATEGORY AIRPLANES Design and Construction Control Systems § 25.693 Joints. Control system joints (in push-pull systems) that are subject to angular motion, except those in ball and roller bearing systems, must have a...

2010-01-01

336

26 - LMFBR Flexible Pipe Joint Development.  

National Technical Information Service (NTIS)

Objective is the qualification of a PLBR-size primary loop flexible piping joint to the ASME Band PVC rules. Progress and activities are reported for: Class 1 flexible joint code approval support, engineering and design, material development, component te...

R. V. Anderson

1978-01-01

337

Decompression Sickness Affecting the Temporomandibular Joint.  

National Technical Information Service (NTIS)

Three cases of pain-only decompression sickness of the temporomandibular joint following altitude chamber exposure are presented. A detailed interview of each individual revealed no other joint involvement or other complaints. A careful neurologic examina...

F. W. Rudge

1990-01-01

338

Vibration Spectroscopy for Rigid Pavement Joint Assessment.  

National Technical Information Service (NTIS)

The study was conducted on the behavior of joints in concrete pavements, and on developing a non-destructive testing technique based on the frequency response of dynamically loaded joints. One of the objectives was to investigate the relationship between ...

L. Palmieri T. Krauthammer

1990-01-01

339

Bones, Muscles, and Joints: The Musculoskeletal System  

MedlinePLUS

... for example, allows for backward, forward, sideways, and rotating movement. Joints are classified by their range of ... the knees and elbows. Pivot joints allow a rotating or twisting motion, like that of the head ...

340

Arthrocentesis: the latest on joint pain relief.  

PubMed

Arthrocentesis is a procedure in the diagnostic workup and treatment of joint pain that has few complications. Analysis of joint fluid yields important treatment data. Corticosteroid and local anesthetic injections provide longer pain relief. PMID:23958670

Voll, Sandra K; Walsh, Joseph

2013-09-10

341

Seismic response of rock joints and jointed rock mass  

SciTech Connect

Long-term stability of emplacement drifts and potential near-field fluid flow resulting from coupled effects are among the concerns for safe disposal of high-level nuclear waste (HLW). A number of factors can induce drift instability or change the near-field flow patterns. Repetitive seismic loads from earthquakes and thermal loads generated by the decay of emplaced waste are two significant factors. One of two key technical uncertainties (KTU) that can potentially pose a high risk of noncompliance with the performance objectives of 10 CFR Part 60 is the prediction of thermal-mechanical (including repetitive seismic load) effects on stability of emplacement drifts and the engineered barrier system. The second KTU of concern is the prediction of thermal-mechanical-hydrological (including repetitive seismic load) effects on the host rock surrounding the engineered barrier system. The Rock Mechanics research project being conducted at the Center for Nuclear Waste Regulatory Analyses (CNWRA) is intended to address certain specific technical issues associated with these two KTUs. This research project has two major components: (i) seismic response of rock joints and a jointed rock mass and (ii) coupled thermal-mechanical-hydrological (TMH) response of a jointed rock mass surrounding the engineered barrier system (EBS). This final report summarizes the research activities concerned with the repetitive seismic load aspect of both these KTUs.

Ghosh, A.; Hsiung, S.M.; Chowdhury, A.H. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

1996-06-01

342

Improvement of adhesive-bonded structural joints  

NASA Technical Reports Server (NTRS)

Investigation is described of methods for obtaining uniform shear stress distribution in adhesives used in double-lap bonded joints. Design rules for reducing adhesive peak shear stresses are listed. Test results of an analysis of straight-lap joint design and stepped-lap joint design are given.

Evensen, H. A.

1970-01-01

343

77 FR 39560 - International Joint Commission  

Federal Register 2010, 2011, 2012, 2013

...International Joint Commission International Joint Commission Invites...Upper Great Lakes Report The International Joint Commission (IJC...on the final report of its International Upper Great Lakes Study Board...Room A223, 1457 London Rd. MI, 7:00 pm EDT,...

2012-07-03

344

Shear deformation of indium solder joints  

Microsoft Academic Search

Indium solder joint deformation has been investigated under conditions of shear loading and stress relaxation at room temperature. The deformation behavior was characterized as a function of strain, strain rate, joint thickness, and hold time. Implications of the results are discussed relative to thermal stresses and solder joint reliability in an electronic package. Work hardening during loading was found to

R. Darveaux; I. Turlik

1990-01-01

345

Shear deformation of indium solder joints  

Microsoft Academic Search

Indium solder joint deformation was investigated under conditions of shear loading and stress relaxation at room temperature. The deformation behavior was characterized as a function of strain, strain rate, joint thickness, and hold time. Work hardening during loading was found to increase with strain rate in the range of 10-4 to 10 -2 s-1 and decrease with joint thickness in

Robert Darveaux; Iwona Turlik

1990-01-01

346

SELF-HEALING BOLTED JOINT ANALYSIS  

Microsoft Academic Search

The loosening mode of failure of bolted joints is a common form of failure in many structures. Real-time condition monitoring and active control of critical joints will improve the reliability and safety of many structures where bolted joints are used. Impedance-based health monitoring using the electromechanical coupling of piezoelectric materials is used to identify damage. Cylindrical shape memory alloy washers

Daniel M. Peairs; Daniel J. Inman

347

Behavior of jointed ductile iron pipelines  

SciTech Connect

Experimental data on the axial, bending, and torsional behavior of a pipeline joint demonstrated, in particular, the relationship between the load and the deflection behavior of a rubber gasketed joint in a ductile cast iron pipe. These results, along with analytical expressions, are especially useful in predicting the earthquake behavior of buried pipelines with flexible joints.

Singhal, A.C.

1984-03-01

348

Behavior of jointed ductile iron pipelines  

Microsoft Academic Search

Experimental data on the axial, bending, and torsional behavior of a pipeline joint demonstrated, in particular, the relationship between the load and the deflection behavior of a rubber gasketed joint in a ductile cast iron pipe. These results, along with analytical expressions, are especially useful in predicting the earthquake behavior of buried pipelines with flexible joints.

Singhal

1984-01-01

349

Granulomatous pseudotumors in total joint replacement  

Microsoft Academic Search

Fourteen patients (15 joints) developed a foreign body reaction to methylmethacrylate, polyethylene, or metal adjacent to a total joint implan, a condition we would like to term granulomatous pseudotumors. There were eight male and six female patients. Their average age was 61 years. The hip was involved in 14 joints (femoral component 11 times, acetabulum 7, and great trochanter once).

Harry J. Griffiths; James Burke; Thomas A. Bonfiglio

1987-01-01

350

Investigation of High-Tension Cable Joints  

Microsoft Academic Search

With suitable cable, the successful operation of a high-tension cable system depends on the joints between consecutive lengths and this phase of high-voltage cable installation must receive considerable attention in the near future. The essential properties of a good cable joint are: 1. Simplicity of design 2. High dielectric strength 3. Low dielectric loss The dielectric strength of a joint,

E. W. Davis; G. J. Crowdes

1925-01-01

351

Sealing of Small Movement Bridge Expansion Joints.  

National Technical Information Service (NTIS)

Sealing of bridge expansion joint systems is important to protect the structural components below the joint from damage due to water, salt, and other roadway debris. A new elastomeric foam-type joint sealant has been developed for sealing small-movement b...

R. B. Malla M. T. Shaw M. R. Shrestha S. Boob

2006-01-01

352

38 CFR 4.66 - Sacroiliac joint.  

Code of Federal Regulations, 2012 CFR

...palpation and percussion over these joints, loss of normal quickness...objective evidence of damage to the joint, and history of trauma sufficiently...strong and practically immovable joint is required. There should be...and the various symptoms of pain and paralysis attributable...

2012-07-01

353

Navigating Joint Projects in Telephone Conversations  

ERIC Educational Resources Information Center

Conversation coordinates joint activities and the joint projects that compose them. Participants coordinate (1) vertical transitions on entering and exiting joint projects; and (2) horizontal transitions in continuing within them. Transitions are coordinated using project markers such as uh-huh, yeah, right, and okay. In the authors' proposal,…

Bangerter, Adrian; Clark, Herbert H.; Katz, Anna R.

2004-01-01

354

THE DUCTILITY OF BRAZED STAINLESS STEEL JOINTS  

Microsoft Academic Search

The ductility of Type 310 stainless steel T-joints brazed with GE-62 ; brazing alloy was measured. The measure of ductility was taken as the plastic ; axial strain required to crack braze fillets in T-section tensile specimens. At ; elevated temperatures, the ductility of as-brazed joints approximated that of the ; stainless steel, but at room temperature the brazed joints

H. A. Saller; J. T. Stacy; N. S. Eddy

1953-01-01

355

Junction stresses in buried jointed pipelines  

Microsoft Academic Search

An analytical and experimental investigation on the effects of placing flexible joints in the vicinity of buried pipeline junctions evaluated the following important variables: (1) flexibility of rubber-gasketed pipeline joints, (2) bending and axial stiffness of cast-iron pipe barrels and joints, (3) modulus of soil foundation and direct soil shear effects, and (4) variations in the network topology of intersecting

A. C. Singhal; Chian-Lee Meng

1983-01-01

356

Sternoclavicular joint disease in psoriatic arthritis.  

PubMed Central

The radiological and tomographic aspects of the sternoclavicular joint were examined in 10 patients with psoriatic arthritis to evaluate better how this joint was affected using different radiological techniques. Imaging of the sternoclavicular joint showed that computed tomography provides a better visualisation of erosions, subchondral cysts, and sclerosis than standard radiography and conventional linear tomography. Images

Taccari, E; Spadaro, A; Riccieri, V; Guerrisi, R; Guerrisi, V; Zoppini, A

1992-01-01

357

State Technologies Advancement Collaborative  

SciTech Connect

The U. S. Department of Energy (DOE), National Association of State Energy Officials (NASEO), and Association of State Energy Research and Technology Transfer Institutions (ASERTTI) signed an intergovernmental agreement on November 14, 2002, that allowed states and territories and the Federal Government to better collaborate on energy research, development, demonstration and deployment (RDD&D) projects. The agreement established the State Technologies Advancement Collaborative (STAC) which allowed the states and DOE to move RDD&D forward using an innovative competitive project selection and funding process. A cooperative agreement between DOE and NASEO served as the contracting instrument for this innovative federal-state partnership obligating funds from DOE's Office of Energy Efficiency and Renewable Energy and Office of Fossil Energy to plan, fund, and implement RDD&D projects that were consistent with the common priorities of the states and DOE. DOE's Golden Field Office provided Federal oversight and guidance for the STAC cooperative agreement. The STAC program was built on the foundation of prior Federal-State efforts to collaborate on and engage in joint planning for RDD&D. Although STAC builds on existing, successful programs, it is important to note that it was not intended to replace other successful joint DOE/State initiatives such as the State Energy Program or EERE Special Projects. Overall the STAC process was used to fund, through three competitive solicitations, 35 successful multi-state research, development, deployment, and demonstration projects with an overall average non-federal cost share of 43%. Twenty-two states were awarded at least one prime contract, and organizations in all 50 states and some territories were involved as subcontractors in at least one STAC project. Projects were funded in seven program areas: (1) Building Technologies, (2) Industrial Technologies, (3) Transportation Technologies, (4) Distributed Energy Resources, (5) Hydrogen Technology Learning Centers, (6) Fossil Energy, and (7) Rebuild America.

David S. Terry

2012-01-30

358

Autologous fat grafts placed around temporomandibular joint total joint prostheses to prevent heterotopic bone formation  

Microsoft Academic Search

This study evaluated 1) the efficacy of packing autologous fat grafts around temporomandibular joint (TMJ) total joint prosthetic reconstruc- tions to prevent fibrosis and heterotopic bone formation and 2) the ef- fects on postsurgical joint mobility and jaw function. One hundred fifteen patients (5 males and 110 females) underwent TMJ reconstruction with total joint prostheses and simultaneous fat grafts (88

Larry M. Wolford; Carlos A. Morales-Ryan; Patricia Garcia Morales; Daniel Serra Cassano

359

Glycosaminoglycan components in temporomandibular joint synovial fluid as markers of joint pathology  

Microsoft Academic Search

Purpose: This study investigated the correlation between temporomandibular joint (TMJ) disease and the composition of glycosaminoglycans (GAGs) components in the synovial fluid (SF).Materials and Methods: Synovial fluid (SF) was obtained from 30 TMJs of 28 female patients diagnosed as having a displaced disc with reduction (WR) (seven joints), a displaced disc without reduction (WOR) (13 joints), osteoarthritis (OA) (five joints),

Takanori Shibata; Ken-Ichiro Murakami; Eiro Kubota; Hiroshi Maeda

1998-01-01

360

Improving Joint Properties of Friction Welded Joint of High Tensile Steel  

Microsoft Academic Search

This report describes the improvements in the joint properties of friction welded joint of 780MPa class high tensile steel. Welded joint made by a continuous drive friction welding machine, the conventional method, had not obtained 100% joint efficiency despite applying forge pressure. This was due to the softening of the welded interface zone for heat input during braking times. Therefore,

Masaaki Kimura; Masahiro Kusaka; Kenji Seo; Akiyoshi Fuji

2005-01-01

361

NEW MODEL FOR JOINT SHEAR FAILURE OF R\\/C EXTERIOR BEAM-COLUMN JOINTS  

Microsoft Academic Search

A new analytical models for joint shear failure of reinforced concrete exterior beam-column joints is proposed. It is used for predictidction of strength and failure modes and it is extended from a model for interior beam-column joints by the author. The model contains no empirical factors accounting the difference between exterior and interior joint. The both model considers four diago-

Hitoshi Shiohara

362

Analysis of multifastener composite joints  

NASA Technical Reports Server (NTRS)

A new numerical procedure for determining load proportioning in multiple-hole mechanical joints in composite plates is presented. The joints are loaded in double lap fashion in tension with pins through the holes. The commercial finite-element program ABAQUS is used to predict the load proportioning among holes using two independent plane stress finite-element models, one representing the composite inner lap and one representing the two steel outer laps, interacting through rigid circular surfaces. The circular surfaces effectively represent rigid pins. Load proportioning is predicted for a number of geometries. Excellent correlation with experimental data is obtained. Experimental and computed surface strains are also found to compare well. The assumption of a radial cosine distribution of contact stress between pin and hole is shown to be substantially in error for some holes.

Griffin, O. H., Jr.; Hyer, M. W.; Yalamanchili, S. R.; Shuart, M. J.; Prasad, C. B.; Cohen, D.

1992-01-01

363

Ultrasonic Welding of Hybrid Joints  

NASA Astrophysics Data System (ADS)

A central research field of the Institute of Materials Science and Engineering at the University of Kaiserslautern (WKK), Germany, is the realization of innovative hybrid joints by ultrasonic metal welding. This article gives an overview of suitable ultrasonic welding systems as well as of essential machine and material parameters, which influence the quality of the welds. Besides the ultrasonic welding of dissimilar metals such as Al to Cu or Al to steels, the welds between newly developed materials like aluminum foam sandwiches or flat flexible cables also can be realized. Moreover, the joining of glass and ceramic to sheet metals is a point of interest at the WKK. By using the ultrasonic metal welding process, it is possible to realize metal/glass welds with tensile shear strengths of 50 MPa. For metal/ceramic joints, the shear strengths values up to 150 MPa were measured. Finally, selected results about the occurring bonding mechanisms will be discussed.

Wagner, Guntram; Balle, Frank; Eifler, Dietmar

2012-03-01

364

Tribology of total artificial joints.  

PubMed

The tribology of total artificial replacement joints is reviewed. The majority of prosthesis currently implanted comprise a hard metallic component which articulates on ultra high molecular weight polyethylene surface. These relatively hard bearing surfaces operate with a mixed or boundary lubrication regime, which results in wear and wear debris from the ultra high molecular weight polyethylene surface. This debris can contribute to loosening and ultimate failure of the prostheses. The tribological performance of these joints has been considered and a number of factors which may contribute to increased wear rates have been identified. Cushion bearing surfaces consisting of low elastic modulus materials which can articulate with full fluid film lubrication are also described. These bearing surfaces have shown the potential for greatly reducing wear debris. PMID:1840723

Fisher, J; Dowson, D

1991-01-01

365

Joints in Venusian lava flows  

NASA Technical Reports Server (NTRS)

The bright polygonal patterns seen in some Magellan images of the volcanic plains are interpreted as joint networks. Several areas displaying such patterns are identified, noting their areal extent, the presence of volcanic features, and the regional topography. Intersection geometries of the lineations defining the polygonal patterns are typical of those found in tensile networks. In addition, the polygonal patterns exhibit no preferred orientation, implying that they are the result of horizontally isotropic stress fields. It is demonstrated that sufficient tensile stresses develop in a cooling Venusian flow to allow joints to form and that the thermal strain predicted is not incompatible with that observed. It is suggested that the tensioned networks are the result of a thermally stressed layer much thicker than a single lava flow. A second model is also considered in which thermal stresses develop as a result of regional elevation of the temperature gradient.

Johnson, Catherine L.; Sandwell, David T.

1992-01-01

366

Sonography of the knee joint?  

PubMed Central

The aim of this article is to review the sonographic appearances of common disorders involving the knee joint. Ultrasound is a sensitive method for diagnosis of tendon injuries. Injured ligaments appear swollen with mixed echogenicity. Meniscal injuries and muscle tears can be easily diagnosed. Ultrasound shows synovial thickening and effusion in inflammatory arthropathy and erosions of the articular surface in degenerative arthritis. It can be used effectively in the detection of rheumatoid arthritic activity and for grading degenerative arthritis lesions. Cystic lesions, as well as benign and malignant soft-tissue masses, are clearly delineated. Ultrasound is a safe noninvasive imaging modality that can be used for diagnosis of different disorders involving the knee joint.

Razek, A.A.K.A.; Fouda, N.S.; Elmetwaley, N.; Elbogdady, E.

2009-01-01

367

Complications of small joint arthroplasty.  

PubMed

Arthritis in the small joints of the hand can be treated with arthrodesis or arthroplasty. Arthrodesis has known risks of infection, pain, and nonunion. Distal interphalangeal (DIP) arthroplasty has been successful in preserving motion and alleviating pain for distal DIP, proximal interphalangeal, and metacarpophalangeal joints. Unfortunately, complications arise that limit the success of surgery. Silicone implants have been reliable for many years but still present with the risks of infection, implant breakage, stiffness, and pain. Newer implant designs may limit some of these complications, but present with unique problems such as dislocations and loosening. It is not yet clear as to which type of implant provides the most reliable results, although implant arthroplasty appears to give better function than arthrodesis. Silicone arthroplasty does not lead to silicone synovitis and is a reliable procedure. Pyrocarbon implants are showing some promise, particularly in the osteoarthritic patient. PMID:20494746

Drake, Matthew L; Segalman, Keith A

2010-05-01

368

Advanced Exercises  

NSDL National Science Digital Library

These exercises help students understand how the code of the Insertion Sort and the Selection Sort work. It also compares how efficient several different algorithms are. Advanced Exercise 1 - Understanding the Insertion Sort code Remember that the Insertion Sort sort works by making sure everything to the left of the pointer is sorted. The variable j of the for loop represents this pointer, and therefore it starts at 1 and continues to the end of the ...

Watts, Mrs.

2007-10-15

369

Advanced glycoxidation  

Microsoft Academic Search

Cardiovascular disease (CVD) is the leading cause of mortality worldwide. A large body of evidence both in vitro and in vivo\\u000a suggests an important role for advanced glycoxidation end products (AGE) in the development or progression of CVD. AGE are\\u000a a heterogenous group of molecules formed within the body during aging and, at an accelerated rate, in diabetes. AGE result

Melpomeni Peppa; Jaime Uribarri; Helen Vlassara

2002-01-01

370

Joint experiments using ETS5  

Microsoft Academic Search

An overview of the PARTNERS (Pan-Pacific Regional Telecommunications Network Research Satellite) project, which is the post-mission utilization of the ETS-5 (Engineering Test Satellite-5) is presented. The project was registered at SAFISY (Space Agency Forum for International Space Year) and includes the following experiments: (1) research on radio propagation characteristics in satellite links in Pan-Pacific region; (2) joint study on development

Mutsumi Nakata

1993-01-01

371

Metal-ceramic joint assembly  

DOEpatents

A metal-ceramic joint assembly in which a brazing alloy is situated between metallic and ceramic members. The metallic member is either an aluminum-containing stainless steel, a high chromium-content ferritic stainless steel or an iron nickel alloy with a corrosion protection coating. The brazing alloy, in turn, is either an Au-based or Ni-based alloy with a brazing temperature in the range of 9500 to 1200.degree. C.

Li, Jian (New Milford, CT)

2002-01-01

372

Joint stabilizing projects in defense  

SciTech Connect

Joint defensive projects could increase stability and decrease the alert rates of strategic forces. Areas include the defense of the US, Commonwealth of Independent States (CIS), and their allies against third world threats; protection against each other's accidental or unauthorized launches; and defense against intentional attacks. The most promising area appears to be defining interfaces for the handover of satellite warning and trajectory information, which applies to most phases of theater defense and mutual protection. 19 refs.

Canavan, G.H.; Browne, J.C.; Joseph, R.J.

1992-06-01

373

Classification of hip joint infections  

PubMed Central

Infections still remain one of the most devastating complications in hip joint surgery. Classification of these infections help the orthopaedic surgeon to identify the acuteness or chronicity of the infection, predict the complexity of the treatment procedure and ensure that all necessary device are available at the time of the revision surgery. The present article reviews the actual literature and provides an overview of clinical, arthroscopic, microbiological and radiological staging systems.

Anagnostakos, Konstantinos; Schmid, Nora Verena; Kelm, Jens; Grun, Ulrich; Jung, Jochen

2009-01-01

374

Tuberculosis of contralateral costotransverse joints  

Microsoft Academic Search

We present a case of multifocal tuberculosis of contralateral costo-transverse joints. Even in countries where tuberculosis\\u000a is common, extrapulmonary multifocal infection is uncommon. Furthermore, a bilateral, symmetric distribution is distinctly\\u000a unusual. The index of suspicion for tuberculosis should increase when the patient is from a country where tuberculosis is\\u000a endemic or when a history of AIDS is present.

S. M. Levine; E. B. Marianacci; S. V. Kattapuram

1997-01-01

375

Tubercular prosthetic knee joint infection.  

PubMed

This article reports a rare case of late-onset tubercular infection following total knee arthroplasty in a 60-year-old woman who had been treated with a full course of antitubercular therapy for latent tuberculosis almost 25 years ago. Because no clear guidelines exist for optimal management of disease reactivation in the prosthetic knee joint, the authors performed a literature review and attempted to provide a treatment algorithm based on the time of presentation. Two modes of presentation were identified for unsuspected tubercular prosthetic joint infections based on the onset of symptoms and time to diagnosis: an early-onset presentation that occurs within the first 6 to 8 weeks postoperatively and a late-onset presentation that usually manifests after 8 weeks. Early-onset presentations often can be treated with standard antitubercular chemotherapy alone, whereas late-onset presentation may require 2-stage reimplantation under cover of antitubercular medications. This report also highlights the fact that despite adequate treatment of latent tuberculosis, patients may remain at risk of prosthetic joint infection following total knee arthroplasty. PMID:24200456

Harwin, Steven F; Banerjee, Samik; Issa, Kimona; Kapadia, Bhaveen H; Pivec, Robert; Khanuja, Harpal S; Mont, Michael A

2013-11-01

376

Joint sparsity for target detection  

NASA Astrophysics Data System (ADS)

In this paper, we propose a joint sparsity model for target detection in hyperspectral imagery. The key innovative idea here is that hyperspectral pixels within a small neighborhood in the test image can be simultaneously represented by a linear combination of a few common training samples, but weighted with a different set of coefficients for each pixel. The joint sparsity model automatically incorporates the inter-pixel correlation within the hyperspectral imagery by assuming that neighboring spectral pixels usually consists of similar materials. The sparse representations of the neighboring pixels are obtained by simultaneously decomposing the pixels over a given dictionary consisting of training samples of both the target and background classes. The recovered sparse coefficient vectors are then directly used for determining the label of the test pixels. Simulation results on several real hyperspectral images show that the proposed algorithm based on the joint sparsity model outperforms the classical hyperspectral target detection algorithms, such as the popular spectral matched filters, matched subspace detectors, adaptive subspace detectors, as well as binary classifiers such as support vector machines.

Chen, Yi; Nasrabadi, Nasser M.; Tran, Trac D.

2011-05-01

377

Space Suit Joint Torque Testing  

NASA Technical Reports Server (NTRS)

In 2009 and early 2010, a test was performed to quantify the torque required to manipulate joints in several existing operational and prototype space suits in an effort to develop joint torque requirements appropriate for a new Constellation Program space suit system. The same test method was levied on the Constellation space suit contractors to verify that their suit design meets the requirements. However, because the original test was set up and conducted by a single test operator there was some question as to whether this method was repeatable enough to be considered a standard verification method for Constellation or other future space suits. In order to validate the method itself, a representative subset of the previous test was repeated, using the same information that would be available to space suit contractors, but set up and conducted by someone not familiar with the previous test. The resultant data was compared using graphical and statistical analysis and a variance in torque values for some of the tested joints was apparent. Potential variables that could have affected the data were identified and re-testing was conducted in an attempt to eliminate these variables. The results of the retest will be used to determine if further testing and modification is necessary before the method can be validated.

Valish, Dana J.

2011-01-01

378

Autophagy and Cartilage Homeostasis Mechanisms in Joint Health, Aging and Osteoarthritis  

PubMed Central

Osteoarthritis (OA) represents the most prevalent joint disease but neither preventive measures nor disease-modifying OA drugs (DMOADs) are available and a continuing need exists for safe and more effective symptom-modifying therapies. Failures of previous clinical trials on DMOADs in patients with established or advanced disease motivate investigation of mechanisms that maintain joint health. Enhancing such mechanisms may be a novel approach to OA risk reduction. Aging is one of its most important OA risk factors. However, aging of joint cartilage is a process that is distinct from the subsequent cartilage changes that develop as OA is initiated. This review is focused on mechanisms that maintain cell and tissue homeostasis, and how these mechanisms fail during the aging process. Augmentation of homeostasis mechanisms will be discussed as a novel avenue to delay joint aging and reduce OA risk.

Lotz, Martin; Carames, Beatriz

2011-01-01

379

Ultrasonic Probing Of Complexly Shaped Joints  

NASA Technical Reports Server (NTRS)

Technique developed involves use of ultrasonics to inspect first bond surfaces of solid-rocket-motor joints. By fitting pieces of insulating materials to mate exactly with complicated shapes of affected parts of insulation, complicated shapes redefined into simpler ones probed more easily. When technique used to insonify from insulation side, one readily detects difference between disbond and good bond. Same technique applied to field tang joints, field clevis joints, and aft-dome-to-fixed-nozzle-housing attachment points. Although developed for inspecting joints in solid rocket motors, also applicable to nondestructive evaluation of other complicated joints.

Madaras, Eric I.

1993-01-01

380

Mechanical Properties of Flush-Riveted Joints  

NASA Technical Reports Server (NTRS)

The strength of representative types of flush-riveted joints has been determined by testing 865 single-shearing, double-shearing, and tensile specimens representing 7 types of rivet and 18 types of joint. The results, presented in graphic form, show the stress at failure, type of failure, and d/t ratio. In general, dimpled joints were appreciably stronger than countersunk or protruding-head joints, but their strength was greatly influenced by constructional details. The optimum d/t ratios have been determined for the several kinds of joints. Photomicrographs of each type show constructional details and, in several instances, cracks in the sheet.

Brueggeman, W C; Roop, Frederick C

1940-01-01

381

Innovative use of adhesive interface characteristics to nondestructively quantify the strength of bonded joints  

Microsoft Academic Search

Advances in structural adhesives have permitted engineers to contemplate the use of bonded joints in areas that have long been dominated by mechanical fasteners and welds. Although strength, modulus, and toughness have been improved in modern adhesives, the typical concerns with using these polymers still exist. These include concerns over long-term durability and an inability to quantify bond strength (i.e.,

Dennis Patrick Roach; Randy L. Duvall; Kirk A. Rackow

2010-01-01

382

Computer Assisted Surgery and Current Trends in Orthopaedics Research and Total Joint Replacements  

Microsoft Academic Search

Musculoskeletal research has brought about revolutionary changes in our ability to perform high precision surgery in joint replacement procedures. Recent advances in computer assisted surgery as well better materials have lead to reduced wear and greatly enhanced the quality of life of patients. The new surgical techniques to reduce the size of the incision and damage to underlying structures have

Farid Amirouche

2008-01-01

383

Systems Engineering Approach to Analyzing Weather Input Sensitivities of the Joint Precision Air Drop System.  

National Technical Information Service (NTIS)

The United States Air Force is partnering with the United States Army as well as allied nations to develop a revolutionary advance in logistical support known as the Joint Precision Air Drop System (JPADS). The focus of this study is to develop a process ...

D. L. Gemas

2007-01-01

384

Analytical and Experimental Assessment of Seismic Vulnerability of Beam-Column Joints without Transverse Reinforcement in Concrete Buildings  

NASA Astrophysics Data System (ADS)

Beam-column joints in concrete buildings are key components to ensure structural integrity of building performance under seismic loading. Earthquake reconnaissance has reported the substantial damage that can result from inadequate beam-column joints. In some cases, failure of older-type corner joints appears to have led to building collapse. Since the 1960s, many advances have been made to improve seismic performance of building components, including beam-column joints. New design and detailing approaches are expected to produce new construction that will perform satisfactorily during strong earthquake shaking. Much less attention has been focused on beam-column joints of older construction that may be seismically vulnerable. Concrete buildings constructed prior to developing details for ductility in the 1970s normally lack joint transverse reinforcement. The available literature concerning the performance of such joints is relatively limited, but concerns about performance exist. The current study aimed to improve understanding and assessment of seismic performance of unconfined exterior and corner beam-column joints in existing buildings. An extensive literature survey was performed, leading to development of a database of about a hundred tests. Study of the data enabled identification of the most important parameters and the effect of each parameter on the seismic performance. The available analytical models and guidelines for strength and deformability assessment of unconfined joints were surveyed and evaluated. In particular, The ASCE 41 existing building document proved to be substantially conservative in joint shear strength estimation. Upon identifying deficiencies in these models, two new joint shear strength models, a bond capacity model, and two axial capacity models designed and tailored specifically for unconfined beam-column joints were developed. The proposed models strongly correlated with previous test results. In the laboratory testing phase of the current study, four full-scale corner beam-column joint subassemblies, with slab included, were designed, built, instrumented, tested, and analyzed. The specimens were tested under unidirectional and bidirectional displacement-controlled quasi-static loading that incorporated varying axial loads that simulated overturning seismic moment effects. The axial loads varied between tension and high compression loads reaching about 50% of the column axial capacity. The test parameters were axial load level, loading history, joint aspect ratio, and beam reinforcement ratio. The test results proved that high axial load increases joint shear strength and decreases the deformability of joints failing in pure shear failure mode without beam yielding. On the contrary, high axial load did not affect the strength of joints failing in shear after significant beam yielding; however, it substantially increased their displacement ductility. Joint aspect ratio proved to be instrumental in deciding joint shear strength; that is the deeper the joint the lower the shear strength. Bidirectional loading reduced the apparent strength of the joint in the uniaxial principal axes. However, circular shear strength interaction is an appropriate approximation to predict the biaxial strength. The developed shear strength models predicted successfully the strength of test specimens. Based on the literature database investigation, the shear and axial capacity models developed and the test results of the current study, an analytical finite element component model based on a proposed joint shear stress-rotation backbone constitutive curve was developed to represent the behavior of unconfined beam-column joints in computer numerical simulations of concrete frame buildings. The proposed finite element model included the effect of axial load, mode of joint failure, joint aspect ratio and axial capacity of joint. The proposed backbone curve along with the developed joint element exhibited high accuracy in simulating the test response of the current test specimens as well as previous test joints. Fi

Hassan, Wael Mohammed

385

Traction-drive force transmission for telerobotic joints  

NASA Technical Reports Server (NTRS)

A mechanism which meets the requirements of a teleoperated manipulator and those of an autonomous robot is discussed. The mechanism is a traction-drive differential that uses variable preload mechanisms. The differential provides compact design, with dextrous motion range and torque density similar to geared systems. The traction drive offers high stiffness to backlash for good robotic performance. The variable-loading mechanism (VLM) minimizes the drive-train friction for improved teleoperation. This combination provides a mechanism to allow advanced manipulation with either teleoperated control or autonomous robotic operation. The design principles of both major components of the joint mechanism are described.

Williams, D. M.; Kuban, D. P.

1989-01-01

386

[A shock-absorber-damper endoprosthesis for the hip joint].  

PubMed

The paper deals with the construction of an implant for complete thigh joint removal. The implant works on a new principle, i.e. division of the major parts of the prosthesis into load-carrying and bearing parts which are isolated all the way with damping silicone gaskets. The implant has a fundamentally new construction. It is accessible for commercial production by advanced technologies and readily applicable in clinical practice. The estimated results of its application are positive as when used, the implant brings a considerably less pressure to bear on the bone than do the well-known Russian and foreign implant models. PMID:8668027

Sherepo, K M

1995-01-01

387

Columnar Jointing Thermo-Mechanics  

NASA Astrophysics Data System (ADS)

Thermo-mechanical effects, common to a wide range of geological phenomena, are integral to the formation of columnar joints during cooling and crystallisation of lava flows. The process, and resultant geometry, relies on a complex inter-play between heat distribution, contraction and tensile strength, yet the kinetics of their formation remains elusive. Results are presented from a combination of field survey, thermo-analytical characterisation and mechanical investigation to constrain conditions favourable for columnar jointing. Columnar joints from Seljavallir, Iceland, produce quadratic to heptagonal cross sectional patterns with column widths ranging from 20 to 70 cm in size. The fracture surfaces are characterised by striae of which spacing (between 1 to 6 cm) appear to share a positive linear relationship to the joint spacing. The striae exhibit both a smooth and rough portion, interpreted to express a change in deformation regime from fully brittle, mode-I fracture propagation to an increasingly ductile response of the lava with tensile fracture dissipation as the fracture event wanes. The contraction of the basalts has been investigated via the expansion coefficient determined in a dilatometer (at 3mN of normal stress and a rate of 2 °C/min). The expansion coefficient has been constrained to 10-5/°C and the onset of melting (and completion of natural crystallisation) at 1150°C. Experiments are currently being conducted to assess the effect of cooling rate and normal stress on the properties of the Seljavallir basalts. The mechanical properties of the rock in tension have been tested at room temperature in a uniaxial press (high-temperature tests are also scheduled). During true-tension pull test at a strain rate of 10-4 s-1, elastic deformation agrees to a Young's modulus of 6.3 GPa. Tensile failure initiated after 0.35% strain with the generation of a large crack at a peak stress of 2.2 MPa. The fracture induced a stress drop and upon stress build-up to 0.6 MPa a series of small fractures ensued. We interpret this two-stage fracture dynamics as the cause for the change in fracture surface observed in nature. A combined thermo-mechanical model is presented to constrain the onset temperature and dynamics of columnar jointing.

Iddon, Fiona; Hornby, Adrian; Kendrick, Jackie; Wadsworth, Fabian; von Aulock, Felix; Lavallée, Yan

2014-05-01

388

Jointly Sponsored Research Program. Final report  

SciTech Connect

The Jointly Sponsored Research Program (JSRP) is a US Department of Energy (DOE) program funded through the Office of Fossil Energy and administered at the Morgantown Energy Technology Center. Under this program, which has been in place since Fiscal Year 1990, DOE makes approximately $2.5 million available each year to the Energy and Environmental Research Center (EERC) to fund projects that are of current interest to industry but which still involve significant risk, thus requiring some government contribution to offset the risk if the research is to move forward. The program guidelines require that at least 50% of the project funds originate from nonfederal sources. Projects funded under the JSRP often originate under a complementary base program, which funds higher-risk projects. The projects funded in Fiscal Year 1996 addressed a wide range of Fossil Energy interests, including hot-gas filters for advanced power systems; development of cleaner, more efficient processing technologies; development of environmental control technologies; development of environmental remediation and reuse technologies; development of improved analytical techniques; and development of a beneficiation technique to broaden the use of high-sulfur coal. Descriptions and status for each of the projects funded during the past fiscal year are included in Section A of this document, Statement of Technical Progress.

NONE

1997-07-01

389

Initial Evaluation of Advanced Powder Metallurgy Magnesium Alloys for Dynamic Applications.  

National Technical Information Service (NTIS)

The U.S. Army Research Laboratory (ARL) is interested in assessing the performance of different magnesium alloys. The ARL and the Joining and Welding Research Institute (JWRI) conducted a joint effort to develop and evaluate advanced powder metallurgy mag...

K. Kondoh T. Jones

2009-01-01

390

Advanced Techniques and Technology for Efficient Data Storage, Access, and Transfer.  

National Technical Information Service (NTIS)

Advanced techniques for efficiently representing most forms of data are being implemented in practical hardware and software form through the joint efforts of three NASA centers. These techniques adapt to local statistical variations to continually provid...

R. F. Rice W. Miller

1991-01-01

391

Subject-specific analysis of joint contact mechanics: application to the study of osteoarthritis and surgical planning.  

PubMed

Advances in computational mechanics, constitutive modeling, and techniques for subject-specific modeling have opened the door to patient-specific simulation of the relationships between joint mechanics and osteoarthritis (OA), as well as patient-specific preoperative planning. This article reviews the application of computational biomechanics to the simulation of joint contact mechanics as relevant to the study of OA. This review begins with background regarding OA and the mechanical causes of OA in the context of simulations of joint mechanics. The broad range of technical considerations in creating validated subject-specific whole joint models is discussed. The types of computational models available for the study of joint mechanics are reviewed. The types of constitutive models that are available for articular cartilage are reviewed, with special attention to choosing an appropriate constitutive model for the application at hand. Issues related to model generation are discussed, including acquisition of model geometry from volumetric image data and specific considerations for acquisition of computed tomography and magnetic resonance imaging data. Approaches to model validation are reviewed. The areas of parametric analysis, factorial design, and probabilistic analysis are reviewed in the context of simulations of joint contact mechanics. Following the review of technical considerations, the article details insights that have been obtained from computational models of joint mechanics for normal joints; patient populations; the study of specific aspects of joint mechanics relevant to OA, such as congruency and instability; and preoperative planning. Finally, future directions for research and application are summarized. PMID:23445048

Henak, Corinne R; Anderson, Andrew E; Weiss, Jeffrey A

2013-02-01

392

NASA's National Center for Advanced Manufacturing  

NASA Technical Reports Server (NTRS)

An investment in the future, NASA has designated a new initiative where government, industry, and academia collaborate to meet the manufacturing needs of future space systems. The Marshall Space Flight Center in Huntsville, Alabama has the principal responsibility for implementation of the National Center for Advanced Manufacturing (NCAM). The mission of the NCAM is to build partnerships that will jointly conduct program planning and develop strategies to perform manufacturing research and technology development for critical national missions.

Vickers, John H.; Frazier, Michael K.; Munafo, Paul M. (Technical Monitor)

2002-01-01

393

Total Hip Arthroplasty in Patients with Active Tuberculosis of the Hip with Advanced Arthritis  

Microsoft Academic Search

Osteoarticular tuberculosis (TB) in the hip and other joints is increasing and patients in developing countries commonly present\\u000a with advanced joint destruction. We asked whether TB is reactivated after THA in these patients. We retrospectively reviewed\\u000a 12 patients with an average age of 45 years who had advanced stages of hip destruction secondary to mycobacterium TB and who\\u000a were treated with

Devdatta Suhas Neogi; Chandra Shekhar Yadav; Ashok Kumar; Shah Alam Khan; Shishir Rastogi

2010-01-01

394

Tribology of human and artificial joints.  

PubMed

Studies of human joint lubrication mechanisms have led to the conclusion that under normal healthy conditions they are fluid film lubricated. The main features responsible for allowing this mechanism to operate are the dynamic nature of the loading and the compliance of the bearing surfaces (articular cartilage). In contrast, artificial joints, being made of much more rigid materials, have been demonstrated to be lubricated by a mixed regime, where some load is carried by the fluid film and some by solid to solid contact. Since some surface contact takes place then wear remains a problem and friction is much higher than in human joints. The use of compliant surface bearings for artificial joints has been explored and shown to be of great advantage, reproducing the effects of natural joints. However, elastomeric materials are known to degrade in aqueous solutions so this aspect has been examined to ensure a reasonable life in the human body. Joints of the lower limb--hip, knee, and ankle--have similar load and motion patterns and behave in a similar way in terms of lubrication. Joints of the hand are not in any way similar in their behaviour and so a typical upper limb joint, the finger, has been studied to see if improvements can be made to the design of replacement artificial joints. Novel suggestions like plastic on plastic joints have been shown to be an alternative which is worthy of further consideration. PMID:1823790

Unsworth, A

1991-01-01

395

The Planar Shape of Rock Joints  

NASA Astrophysics Data System (ADS)

Knowing the planar shape of discontinuities is important when characterizing discontinuities in a rock mass. However, the real discontinuity shape is rarely known, since the rock mass is usually inaccessible in three dimensions. Information on discontinuity shape is limited and often open to more than one interpretation. This paper discusses the planar shape of rock joints, the most common discontinuities in rock. First, a brief literature review about the shape of joints is presented, including some information on joint-surface morphology, inferences from observed trace lengths on different sampling planes, information based on experimental studies, and joint shapes assumed by different researchers. This review shows that joints not affected by adjacent geological structures such as bedding boundaries or pre-existing fractures tend to be elliptical (or approximately circular but rarely). Joints affected by or intersecting such geological structures tend to be rectangular. Then, using the general stereological relationship between trace length distributions and joint size distributions developed by Zhang et al. (Geotechnique 52(6):419-433, 2002) for elliptical joints, the effect of sampling plane orientation on trace lengths is investigated. This study explains why the average trace lengths of non-equidimensional (elliptical or similar polygonal) joints on two sampling planes can be about equal and thus the conclusion that rock joints are equidimensional (circular) drawn from the fact that the average trace lengths on two sampling planes are approximately equal can be wrong. Finally, methods for characterizing the shape and size of joints (elliptical or rectangular) from trace length data are recommended, and the appropriateness of using elliptical joint shapes to represent polygonal, especially rectangular, joints is discussed.

Zhang, Lianyang; Einstein, Herbert H.

2010-02-01

396

Semiconstrained Distal Radioulnar Joint Prosthesis  

PubMed Central

Distal radioulnar joint (DRUJ) problems can occur as a result of joint instability, abutment, or incongruity. The DRUJ is a weight-bearing joint; the ulnar head is frequently excised either totally or partially, and in some cases it is fused, because of degenerative, rheumatoid, or posttraumatic arthritis. Articles about these procedures report the ability to pronate and supinate, but they rarely discuss grip strength, and even less do they address lifting capacity. We report the long term results of the first 35 patients who underwent total DRUJ arthroplasty with the Aptis DRUJ prosthesis after 5 years follow-up. Surgical indications were all causes of dysfunctional DRUJ (degenerative, posttraumatic, autoimmune, congenital). We recorded data for patient demographics, range of motion (ROM), strength, and lifting capacity of the operated and of the nonoperated extremity. Pain and functional assessments were also recorded. The Aptis DRUJ prosthesis, a bipolar self-stabilizing DRUJ endoprosthesis that restores forearm function, consists of a semiconstained and modular implant designed to replace the function of the ulnar head, the sigmoid notch of the radius, and the triangular fibrocartilage ligaments. The surgical technique is presented in detail. The majority of the patients regained adequate ROM and improved their strength and lifting capacity to the operated side. Pain and activities of daily living were improved. Twelve patients experienced complications, most commonly being extensor carpi ulnaris (ECU) tendinitis, ectopic bone formation, bone resorption with stem loosening, low-grade infection, and need for ball replacement. The Aptis total DRUJ replacement prosthesis is an alternative to salvage procedures that enables a full range of motion as well as the ability to grip and lift weights encountered in daily living activities.

Savvidou, Christiana; Murphy, Erin; Mailhot, Emilie; Jacob, Shushan; Scheker, Luis R.

2013-01-01

397

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the second quarterly progress report for Year 3 of the ACTS project. It includes a review of progress made in: (1) Flow Loop development and (2) research tasks during the period of time between Oct 1, 2001 and Dec. 31, 2001. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 3: Addition of a Cuttings Injection/Collection System), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (d) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (e) Research on instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), and Foam properties while transporting cuttings. (Task 12), (f) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S). (g) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Affonso Lourenco; Evren Ozbayoglu; Lei Zhou

2002-01-30

398

Rationale for the Joint Discussion  

NASA Astrophysics Data System (ADS)

This Joint Discussion (JD) will consider the birth processes of massive stars. While similar phenomena (e.g., accretion discs, outflows, etc.) are found in low mass star formation, additional physics must be considered given the ionization of the interstellar environment by Lyman continuum photons, stellar winds from the hot star(s), and their deeper gravitational potentials. This JD will bring together experts from several disparate astronomical communities: stellar astrophysics, interstellar medium, radio astronomy, and stellar dynamics. The concept is to contrast observations of very young stars and star formation regions over various wavelengths with theoretical expectations.

Conti, Peter S.; Churchwell, Edwin B.

399

An Introduction to Joint Control  

PubMed Central

Lowenkron and colleagues (Lowenkron, 1984; 1991; 1998; 2006; Lowenkron and Colvin, 1992) describe a model that explains complex behavior using only well-established behavioral principles, concepts and terms. The model, called joint control, is especially useful for understanding complex and delayed discriminations within a purely behavioral framework and with no appeal to hypothetical concepts or structures. In it the listener is an active behaver rather than a processor of information. In fact, on this account the listener becomes a speaker. Several examples of the relevance of this approach to the explanation of complex behavior are provided, including cases of stimulus selection, conditional discrimination, and generalized identity matching.

Lowenkron, Barry

2006-01-01

400

Space nuclear system expansion joints  

NASA Technical Reports Server (NTRS)

The engineering, design, and fabrication status of the expansion joint unit (EJU) to be employed in the NaK primary coolant piping loop of the 5-kwe Reactor thermoelectric system are described. Four EJU's are needed in the NaK primary coolant piping loop. The four EJU's which will be identical, utilize bellows as the flexing member, are hermetically sealed, and provide double containment. The bellows are of a nested-formed design, and are to be constructed of 1-ply thickness of 0.010-in. Inconel 718. The EJU's provide a minimum piping load margin of safety of +0.22.

Whitaker, W. D.; Shimazki, T. T.

1973-01-01

401

Joint Center for Artificial Photosynthesis  

SciTech Connect

The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

2013-12-10

402

Joint Center for Artificial Photosynthesis  

ScienceCinema

The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

2013-12-19

403

Leukocyte and bacteria imaging in prosthetic joint infection.  

PubMed

There has been a significant increase in the number of joint prosthesis replacements worldwide. Although relatively uncommon, complications can occur with the most serious being an infection. Various radiological and nuclear imaging techniques are available to diagnose prosthetic joint infections (PJI). In this review article, we describe the pathophysiology of PJI, the principles of nuclear medicine imaging and the differences between Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET). The value of nuclear medicine techniques for clinical practice is also discussed. Then we provide an overview of the most often used radionuclide imaging techniques that may be helpful in diagnosing prosthetic joint infection: the (67)Ga-citrate, labelled white blood cells in vitro and in vivo (monoclonal antibodies directed against specific targets on the leukocytes), and (18)F-fluorodeoxyglucose ((18)F-FDG). We describe their working methods, the pitfalls, and the interpretation criteria. Furthermore, we review recent advances in imaging bacteria, a molecular imaging method that holds promises for the detection of occult infections. We conclude proposing two diagnostic flow-charts, based on data in the literature, that could help the clinicians to choose the best nuclear imaging method when they have a patient with suspicion of or with proven PJI. PMID:23325539

Glaudemans, Andor W J M; Galli, Filippo; Pacilio, Marta; Signore, Alberto

2013-01-01

404

Arthroscopy of the temporomandibular joint: technique and operative images.  

PubMed

Over the years, little has changed in the preoperative indications and treatment for these patients. They must have failed a course of nonsurgical care, including physical therapy and medication up to 6 months. They must have had imaging done confirming intra-articular joint pathology (disc displacement, disc immobility for the most part, and joint effusions in some instances). Important technical issues include the use of two cannulas placed approximately 1 cm apart. Cannulas are not routinely placed initially into the anterior recess. Heavy downward pressure applied to the posterior ligament with a blunt obturator is used to assure mobility of the disc, and electrocautery or laser energy is used on the surface of the posterior ligament synovium for hemostasis and denervation (pain control). Corticosteroids are used infrequently. To avoid scuffing or damaging the joint surfaces unnecessarily, lysis is done using triangulation methods. Advanced instrumentation is used as the need arises but not used routinely. These patients can expect a predictably successful outcome with minimal recovery time and complications. PMID:14552050

White, R Dean

2003-09-01

405

The impact of strain, bedding plane friction and overburden pressure on joint spacing  

NASA Astrophysics Data System (ADS)

In layered sequences, rock joints usually best develop within the more brittle layers and commonly display a regular spacing that scales with layer thickness. A variety of conceptual and mechanical models have been advanced to explain this relationship. A limitation of previous approaches, however, is that fracture initiation and associated bedding-parallel slip are not explicitly simulated; instead, fractures were predefined and interfaces were welded. To surmount this problem, we have modelled the formation and growth of joints in layered sequences by using the two-dimensional Distinct Element Method (DEM) as implemented in the Particle Flow Code (PFC-2D). In PFC-2D, rock is represented by an assemblage of circular particles that are bonded at particle-particle contacts, with failure occurring when either the tensile or shear strength of a bond is exceeded. Model materials with different rheological properties can be generated by calibrating the results of synthetic mechanical test procedures with those of real rocks. Our simple models of jointing comprise a central brittle layer with high Young's modulus, which is embedded in a low Young's modulus matrix. The interfaces between the layers (i.e. bedding planes) are defined by ‘smooth joint' contacts, a modelling feature that eliminates interparticle bumpiness and associated interlocking friction. Consequently, this feature allows the user to assign macroscopic properties such as friction along layer interfaces in a controlled manner. Layer parallel extension is applied by assigning a velocity to particles at the lateral boundaries of the model while maintaining a constant vertical confining pressure. Models were extended until joint saturation was reached in the central layer. We thereby explored the impact of strain, bedding plane friction and overburden pressure on joint spacing. The modelling revealed that joint spacing decreases as strain, bedding plane friction and overburden pressure are increased. Contrary to a leading established model the spacing of joints is not a diagnostic feature of joint system saturation.

Arslan, Arzu; Schöpfer, Martin P. J.; Walsh, John J.; Childs, Conrad

2010-05-01

406

Heat treatment of soldered copper joints  

Microsoft Academic Search

1.The mechanical properties of copper joints soldered with lead and PSr 7.5 solder at 850°C in vacuum remain unchanged with increasing cooling rates.2.When copper joints are soldered with tin and indium in vacuum an increase of the cooling rate reduces the hardness in the zone of fusion and increases the shear strength of the joint. The strength and ductility are

Yu. F. Shein; I. E. Petrunin

1970-01-01

407

Failure of transversely stitched RTM lap joints  

Microsoft Academic Search

An experimental evaluation has been undertaken to investigate the effect of transverse stitching on the strength of composite single-lap joints. Balanced single-lap joints were considered, and the lay-up for the adherends was (0\\/ ±45\\/90)s. Specimens were stitched with Kevlar® thread in a zigzag pattern and were manufactured by using the resin-transfer moulding (RTM) technique. Experimental results indicated that stitched joints

L. Tong; L. K. Jain; K. H. Leong; D. Kelly; I. Herszberg

1998-01-01

408

Hydraulic-Leak Detector for Hidden Joints  

NASA Technical Reports Server (NTRS)

Slow leakage of fluid made obvious. Indicator consists of wick wrapped at one end around joint to be monitored. Wick absorbs hydraulic fluid leaking from joint and transmits to opposite end, located outside cover plate and visible to inspector. Leakage manifested as discoloration of outside end of wick. Indicator reveals leaks in hidden fittings on hydraulic lines. Fast inspection of joints without disassembly. Used in aerospace, petroleum, chemical, nuclear, and other industries where removing covers for inspection impossible, difficult, or time-consuming.

Anderson, G. E.; Loo, S.

1986-01-01

409

Subtle injuries to the lisfranc joint.  

PubMed

The tarsometatarsal joint complex is an osseous and capsuloligamentous network that includes the 5 metatarsals, their articulations with the cuneiforms and cuboid, and the Lisfranc ligament, a strong interosseous attachment between the medial cuneiform and second metatarsal. A multitude of injury patterns exist involving the tarsometatarsal joint complex; a Lisfranc injury does not delineate a specific injury, but instead a spectrum of processes involving the tarsometatarsal joint complex. PMID:22050254

Rosenbaum, Andrew; Dellenbaugh, Samuel; Dipreta, John; Uhl, Richard

2011-11-01

410

Floating distal interphalangeal joint injury: case report.  

PubMed

A 37-year-old man sustained a floating distal interphalangeal (DIP) joint injury to the left index finger. The diagnosis was not confirmed until 3 months after the injury because of minimal deformity of the injured finger. Open reduction and internal fixation of the dorsally displaced floating DIP joint was carried out. Bone union was achieved but radiographs revealed osteoarthritis of the DIP joint. PMID:20724082

Kawamura, Kenji; Omokawa, Shohei; Shimizu, Takamasa; Tanaka, Yasuhito

2010-09-01

411

Planar scarf joints in composite repair  

NASA Technical Reports Server (NTRS)

This study examined the effects of varying certain important geometric parameters on the stresses in an adhesive repair of a thin composite laminate. The repair, a planar scarf joint with a doubler, was studied using finite element methods at scarf angles of 6 deg and 12 deg, damage lengths between 2.5 mm and 25 mm and doubler overlaps between 10 mm and 40 mm. Finite element models also showed that significant stress peaks occur at the ends of the scarf joint adhesive, similar to shear lag phenomena in lap joints. A bending model of the planar scarf joint with a doubler, based on mechanics of materials theory, was also developed.

Adkins, D. W.; Pipes, R. B.

1978-01-01

412

Quick-connect threaded attachment joint  

NASA Technical Reports Server (NTRS)

Joint is self-aligning and tightens with only sixty-five degrees of rotation for quick connects and disconnects. Made of injection-molded plastics or cast or machined aluminum, joint can carry wires, tubes, liquids, or gases. When two parts of joint are brought together, their shapes align them. Small projections on male section and slots on female section further aid alignment; slight rotation of male form engages projections in slots. At this point, threads engage and male section is rotated until joint is fully engaged.

Lucy, M. H.; Messick, W. R.; Vasquez, P.

1979-01-01

413

Multi-National Information Sharing -- Cross Domain Collaborative Information Environment (CDCIE) Solution. Revision 4.  

National Technical Information Service (NTIS)

In February 2004, the Joint Forces Command (JFCOM) began its efforts to provide a near-term Multinational Information Sharing (MNIS) solution to support Warfighters operating in a coalition environment. The JFCOM Joint Futures Laboratory (JFL) solution to...

B. Fletcher, D. Hare

2005-01-01

414

Self-Alining Quick-Connect Joint: Tapered joint is compact and lightweight.  

National Technical Information Service (NTIS)

This citation summarizes a one-page announcement of technology available for utilization. A quick-connect tapered joint is used with a minimum of manipulation and force. Originally developed to assemble large space structures, the joint is simple, compact...

1984-01-01

415

Effectiveness of Horizontal Stirrups in Joint Core for Exterior Beam-Column Joints with Nonseismic Design  

Microsoft Academic Search

Reversed cyclic-load tests on full-scale reinforced concrete exterior beam-column joints with nonseismic design to the British standard BS 8110 were carried out. The seismic behaviour of these non-seismically designed beamcolumn joints was investigated, and the effectiveness of horizontal stirrups in joint core on the seismic performance and shear strength of the joints were emphasised. It was found that horizontal stirrups

J. S. Kaung; H. F. Wong

2011-01-01

416

Outcomes of treatment with custom-made temporomandibular joint total joint prostheses and maxillomandibular counter-clockwise rotation  

PubMed Central

The first 25 consecutive patients with high occlusal plane angulation, dysfunction, and pain who were treated with temporomandibular joint (TMJ) total joint prostheses and simultaneous maxillomandibular counterclockwise rotation were evaluated before surgery (T1), immediately after surgery (T2), and at the longest follow-up (T3) for surgical movements and long-term stability. Subjective ratings were used for patients' facial pain/headache, TMJ pain, jaw function, diet, and disability, and objective functional changes were determined by measuring maximum incisal opening and lateral excursive movements. Results showed that the areas of greatest surgical change included an average decrease in the occlusal plane of 13.3 degrees with advancement at point B of 13.4 mm and at the genial tubercles of 16.3 mm. At longest follow-up, relapse was 0.7 degrees, 0.8 mm, and 1.2 mm, respectively, with no statistically significant changes. Significant subjective pain and dysfunction improvements were observed (P ? 0.001). Maximum incisal opening increased, but lateral excursion decreased. Those who had two or more previous TMJ surgeries showed greater levels of dysfunction at T1 and T3 than those who had one or no previous surgeries, but otherwise patients presented similar amounts of absolute changes. In conclusion, end-stage TMJ patients can achieve significant improvement in their pain, dysfunction, dentofacial deformity, and airway problems in one operation with TMJ reconstruction and mandibular advancement using TMJ custom-made total joint prostheses and simultaneous maxillary osteotomies for maxillomandibular counter-clockwise rotation.

Pinto, Lecio P.; Cardenas, Luis E.; Molina, Omar R.

2008-01-01

417

Joint venture capital investment for clean technologies and their problems in developing countries.  

PubMed

All technological developments are aimed at improving the quality of life of a community of people. Biotechnology is a technology which allows the exploitation of microorganisms, plants and animal cells to take place within an economic framework. Developing countries are looking for programmes achieving sustainable, economical growth conducive to a higher per capita income of the community. Any joint venture which promises social advances and economic benefits will have to be rural-based. This presentation discusses the need for a change in fermentation industry attitudes to allow joint venture capital investment in clean technologies together with the problems developing countries face for the implementation of such technologies. PMID:24415372

Doelle, H W

1996-09-01

418

Matched filtering incorporating colored-noise compensation for joint transform correlators  

NASA Astrophysics Data System (ADS)

Optimal recognition of patterns with respect to noise tolerance is obtained when matched filtering is applied with colored-noise compensation, for which input-noise spectral characteristics have to be known in advance. Conventional joint transform correlator systems provide such optimality only when the input noise is white. We propose general means to facilitate colored-noise tolerance by incorporating either a priori or adaptive noise compensation in joint transform correlator-based matched filtering schemes. Adaptive compensation for colored noise may be achieved in real-time operation by estimation of the noise power spectral density distribution from input power spectra information.

Inbar, Hanni; Marom, Emanuel

1995-10-01

419

Rhizarthrosis fourth grade of eaton with hyperextension of the metacarpophalangeal joint?  

PubMed Central

INTRODUCTION Restoration of thumb function with a painfree, stable, and mobile joint with preserved strength are the main goals of treatment of painful arthritis of the thumb. We present our clinical experience in surgical treatment of this disease, in its highest degree of affectation. PRESENTATION OF CASE A 57-year-old woman presents with a 2-year history of worsening pain at the base of her right, dominant, trapezial-metacarpal (TM) joint. Her thumb metacarpophalangeal (MCP) joint hyperextends 30° with lateral pinch. Radiographs demonstrate Eaton stage IV degenerative changes of her TM joint and no arthritis of her thumb MCP joint. She was successfully treated with a modified Burton–Pellegrini arthroplasty and sesamoidesis to the metacarpal head. DISCUSSION In cases of advanced rhizarthrosis conventional surgery does not serve to correct deformities of the metacarpophalangeal joint that may affect to the postsurgical outcomes. CONCLUSION rhizarthrosis management must be carried out in a global way. When a surgical treatment is planned, all deformities must be taken into account.

Faour-Martin, Omar; Martin-Ferrero, Miguel Angel; Valverde-Garcia, Jose Antonio; Vega-Castrillo, Aurelio; De La Red-Gallego, Maria Angeles

2013-01-01

420

Experimental Investigation of Composite Pressure Vessel Performance and Joint Stiffness for Pyramid and Inverted Pyramid Joints  

NASA Technical Reports Server (NTRS)

The focus of this study is on the suitability in the application of classical laminate theory analysis tools for filament wound pressure vessels with adhesive laminated joints in particular: pressure vessel wall performance, joint stiffness and failure prediction. Two 18-inch diameter 12-ply filament wound pressure vessels were fabricated. One vessel was fabricated with a 24-ply pyramid laminated adhesive double strap butt joint. The second vessel was fabricated with the same number of plies in an inverted pyramid joint. Results from hydrostatic tests are presented. Experimental results were used as input to the computer programs GENLAM and Laminate, and the output compared to test. By using the axial stress resultant, the classical laminate theory results show a correlation within 1% to the experimental results in predicting the pressure vessel wall pressure performance. The prediction of joint stiffness for the two adhesive joints in the axial direction is within 1% of the experimental results. The calculated hoop direction joint stress resultant is 25% less than the measured resultant for both joint configurations. A correction factor is derived and used in the joint analysis. The correction factor is derived from the hoop stress resultant from the tank wall performance investigation. The vessel with the pyramid joint is determined to have failed in the joint area at a hydrostatic pressure 33% value below predicted failure. The vessel with the inverted pyramid joint failed in the wall acreage at a hydrostatic pressure within 10% of the actual failure pressure.

Verhage, Joseph M.; Bower, Mark V.; Gilbert, Paul A. (Technical Monitor)

2001-01-01

421

Joint Control for Dummies*: An Elaboration of Lowenkron's Model of Joint (Stimulus) Control  

PubMed Central

The following paper describes Lowenkron's model of joint (stimulus) control. Joint control is described as a means of accounting for performances, especially generalized performances, for which a history of contingency control does not provide an adequate account. Examples are provided to illustrate instances in which joint control may facilitate performance of a task.

Sidener, David W

2006-01-01

422

Joint Control for Dummies: An Elaboration of Lowenkron's Model of Joint (Stimulus) Control  

ERIC Educational Resources Information Center

The following paper describes Lowenkron's model of joint (stimulus) control. Joint control is described as a means of accounting for performances, especially generalized performances, for which a history of contingency control does not provide an adequate account. Examples are provided to illustrate instances in which joint control may facilitate…

Sidener, David W.

2006-01-01

423

A joint coordinate system proposal for the study of the trapeziometacarpal joint kinematics  

Microsoft Academic Search

The International Society of Biomechanics (ISB) has recommended a standardisation for the motion reporting of almost all human joints. This study proposes an adaptation for the trapeziometacarpal joint.The definition of the segment coordinate system of both trapezium and first metacarpal is based on functional anatomy. The definition of the joint coordinate system (JCS) is guided by the two degrees of

L. Cheze; R. Dumas; J. J. Comtet; C. Rumelhart; M. Fayet

2009-01-01

424

Management of the elbow joint.  

PubMed

The elbow is a complex joint that is prone to bleeding episodes. These features as well as the close proximity of the ulnar nerve and the need to use the elbow in many activities of daily living can lead to a range of symptoms including recurrent bleeds, pain, instability or loss of range of movement and nerve compression. Conservative management includes splinting and proprioceptive retraining monitored by a physiotherapist who is a musculoskeletal expert in hemophilia care. In the event that conservative measures are not successful a range of surgical options may be indicated including elbow replacement. These approaches continue to be evaluated in both the short and long term in order to determine the most effective treatment for the symptomatic elbow. PMID:22726091

Heim, M; Beeton, K; Blamey, G; Goddard, N

2012-07-01

425

JIS - the Joint Information System  

NASA Astrophysics Data System (ADS)

The main aim of JIS (Joint Information System) is to overcome the present lack of detailed knowledge amongst the European Solar Physics community. This lack of knowledge occurs at several levels: groups of researchers, institutions, scientific activities, running programs, resources, new opportunities, observational campaigns etc. JIS will not be data archives -- this is the aim of EGSO, but will provide all information mentioned above collecting all possible data about the institutes and scientists working in the field of solar physics. All European solar physicists will be provided with this information by means of an easy accessible webpage including different inquiry modes (query by country, university, institute, scientist and area of research). Until now such a system did not exist in Europe, but in foreseeable future a user-friendly and logical structured webpage will take on this task.

Hanslmeier, A.; Kienreich, I.; Palle, P.; Sosa, A.

426

Biofluid lubrication for artificial joints  

NASA Astrophysics Data System (ADS)

This research investigated biofluid lubrication related to artificial joints using tribological and rheological approaches. Biofluids studied here represent two categories of fluids, base fluids and nanostructured biofluids. Base fluids were studied through comparison of synthetic fluids (simulated body fluid and hyaluronic acid) as well as natural biofluids (from dogs, horses, and humans) in terms of viscosity and fluid shear stress. The nano-structured biofluids were formed using molecules having well-defined shapes. Understanding nano-structured biofluids leads to new ways of design and synthesis of biofluids that are beneficial for artificial joint performance. Experimental approaches were utilized in the present research. This includes basic analysis of biofluids' property, such as viscosity, fluid shear stress, and shear rate using rheological experiments. Tribological investigation and surface characterization were conducted in order to understand effects of molecular and nanostructures on fluid lubrication. Workpiece surface structure and wear mechanisms were investigated using a scanning electron microscope and a transmission electron microscope. The surface topography was examined using a profilometer. The results demonstrated that with the adding of solid additives, such as crown ether or fullerene acted as rough as the other solids in the 3-body wear systems. In addition, the fullerene supplied low friction and low wear, which designates the lubrication purpose of this particular particle system. This dissertation is constructed of six chapters. The first chapter is an introduction to body fluids, as mentioned earlier. After Chapter II, it examines the motivation and approach of the present research, Chapter III discusses the experimental approaches, including materials, experimental setup, and conditions. In Chapter IV, lubrication properties of various fluids are discussed. The tribological properties and performance nanostructured biofluids are discussed in Chapter V, followed by summary and conclusions in Chapter VI.

Pendleton, Alice Mae

427

Study on BWR with Advanced Recycle System (BARS)  

Microsoft Academic Search

High conversion BWR core concept named BARS (BWR with an Advanced Recycle System) was proposed. Further analytical and experimental study project, especially on tight lattice MOX, has been initiated as the joint study of Toshiba and Gifu University. Neutronic study showed that the twice width bundle was advantageous for the plutonium conversion performance. Additionally, conversion ratio and discharged MA vectors

Kouji Hiraiwa; Yasushi Yamamoto; Shinichi Morooka; Mitsuaki Yamaoka; Nobuaki Abe; Ishi Mitsuhashi; Junji Mimatu; Akira Inoue

2002-01-01

428

Thermal conductance of indium solder joints at low temperatures  

Microsoft Academic Search

The thermal conductances of two indium solder joints were measured between 2 and 130 K. One joint was between two copper pieces and the other joint between beryllium and copper. Both joints gave nearly the same results even though beryllium is much more difficult to wet with indium. The thermal conductances of the joints at 4 K were considerably higher

Ray Radebaugh

1977-01-01

429

The Role of Rehearsal in Joint Control  

ERIC Educational Resources Information Center

Behavior analysts have offered accounts of the behavior involved in matching to sample and delayed matching to sample. But until recently have not offered a behavioral analysis of generalized matching-to-sample. The concept of joint control, however, seems especially suited to such an analysis The present study used a joint-control procedure to…

Gutierrez, Rick D.

2006-01-01

430

Ceramic matrix composite-metal brazed joints  

Microsoft Academic Search

A silicon nitride fibre-reinforced cordierite glass ceramic matrix composite has been brazed to titanium and stainless steel in argon with four different interlayer materials, copper, nickel, tungsten and a metal matrix composite (mmc). Joints were tested in shear and all but one failed in the ceramic composite. The highest strength joint, using a metal matrix interlayer to join cmc to

D. G. Dixon

1995-01-01

431

Scarf Joints in Purlins (Part 2).  

National Technical Information Service (NTIS)

This report examines purlins in roofs in South Africa which are joined by means of scarf joints. It is indicated that a scarf joint can take a higher point load when built into an IBR sheeted roof, than the theoretically calculated load ignoring the effec...

F. R. P. Pienaar B. J. Bronkhorst

1983-01-01

432

Joint Minorities Development Program (JMDP). Final Report.  

ERIC Educational Resources Information Center

The Joint Minorities Development Program (JMDP) was a joint enterprise of Organizing and Supportive Agency, Inc. (OSA) and Human Interest Regarding Employment/Minorities Action Coalition (HIRE/MAC) to train black construction workers and organize them into a self-supportive construction cooperative. JMDP evolved in three stages. The first phase…

Organizing and Supportive Agency, Inc., Ithaca, NY.

433

Weather exposure durability of welded dowel joints  

Microsoft Academic Search

A zigzag pattern of rotationally welded dowels across the interface of a butt joint between two\\u000a wood planks, without any adhesive, was shown to yield joints presenting some resistance to weather exposure,\\u000a although not of exterior grade type.

P. Omrani; H. R. Mansouri; A. Pizzi

2008-01-01

434

Environmental durability of adhesively bonded joints  

Microsoft Academic Search

The goal of this project was to evaluate the environmental durability of adhesively bonded aircraft joints using fracture mechanics. Three aerospace adhesives, two epoxies and one polyimide, were investigated. Adhesive specimens were tested for tensile and toughness behavior. Bonded joint specimens were subject to Mode I, Mode II, and mixed mode fracture and fatigue tests. Prior to testing, selected specimens

Lawrence Michael Butkus

1997-01-01

435

Navstar Global Positioning System Joint Program Office  

NSDL National Science Digital Library

The Navstar Global Positioning System Joint Program Office site provides links to Navstar and GPS, the Joint Program Office, user equipment, space segment, control segment, CSEL Program Office, acquisition logistics, contacts, resources, GPS program library, configuration management, system engineering, user equipment sustainment, and pseudo random noise requests.

Office, Navstar G.

436

Joint Ventures: A New Agenda for Education.  

ERIC Educational Resources Information Center

The author states that vocational education can join in partnerships with industry, labor, and government to contribute to economic development. Examples of current programs are included. The "joint venture" concept is explained and ideas for forming joint ventures are shared. (CH)

Griffin, Dean

1989-01-01

437

The joint venture alternative to mergers.  

PubMed

However, while a joint venture may be "safe" from antitrust challenge, it is not without some practical difficulties, especially with respect to consolidating services at one location or jointly offering services provided at multiple facilities. These practical concerns include: 1. Who will exercise operational management of the joint venture? 2. How will the joint venture deal with different pricing for services that will be provided at multiple locations? 3. What criteria will be used to decide the location at which consolidated tertiary services will be offered? 4. In what circumstances can the joint venture be unwound, either in its entirety or as to discrete functions? When clinical services have been consolidated at one location, there is an appropriate concern by the other hospital that it will be unable to provide or re-enter the market for those services if the joint venture dissolves. These operational concerns, of course, are not addressed in the Consent Decree. Thus, even if a joint venture relationship survives antitrust scrutiny, the parties must still negotiate and resolve these operational issues in order for the joint venture to be viable. PMID:10141072

Enders, R J

1995-02-01

438

Rolling-Convolute Joint For Pressurized Glove  

NASA Technical Reports Server (NTRS)

Rolling-convolute metacarpal/finger joint enhances mobility and flexibility of pressurized glove. Intended for use in space suit to increase dexterity and decrease wearer's fatigue. Also useful in diving suits and other pressurized protective garments. Two ring elements plus bladder constitute rolling-convolute joint balancing torques caused by internal pressurization of glove. Provides comfortable grasp of various pieces of equipment.

Kosmo, Joseph J.; Bassick, John W.

1994-01-01

439

The glenohumeral joint rotation centre in vivo  

Microsoft Academic Search

Within the framework of the current call for standardization in upper extremity research, three methods to determine the glenohumeral joint rotation centre in vivo were tested. Therefore, subjects performed humeral movements, while a 3D electromagnetic tracking device registered the motion of the humerus with respect to the scapula. For the first method to estimate the glenohumeral joint rotation centre five

M. Stokdijk; J. Nagels; P. M. Rozing

2000-01-01

440

Origins of joint visual attention in infants  

Microsoft Academic Search

Two experiments examined the origins of joint visual attention with a training procedure. In Experi- ment I, infants aged 6- 11 months were tested for a gaze-following (joint visual attention) response under feedback and no feedback conditions. In Experiment 2, infants 8-9 months received feedback for either following the experimenter's gaze (natural group) or looking to the opposite side (unnatural

Valerie Corkum; Chris Moore

1998-01-01

441

Degenerative Joint Disease in Female Ballet Dancers  

Microsoft Academic Search

The relationship between long-term ballet dancing and eventual arthrosis of the hip, ankle, subtalar, and first metatarsophalangeal joint was examined in 19 former professional female dancers, aged 50 to 70 years. The dancers were compared with pair-matched controls. All 38 women underwent medical history taking, clinical ex amination, and roentgenography of the joints studied. The roentgenographs were independently judged by

C. Niek van Dijk; Liesbeth S. L. Lim; Alina Poortman; Ernst H. Strübbe; Rene K. Marti

1995-01-01

442

Complex Leadership Challenges of Joint Basing.  

National Technical Information Service (NTIS)

In 2005 the Base Realignment and Closure Commission s Recommendation (BRAC) 146, recommended 26 bases, from the four Services, to consolidate and realign into 12 separate joint bases. In a bold move by the Department of Defense (DoD), joint basing became ...

W. S. Galbraith

2013-01-01

443

Two Hats for the Joint Force Commander.  

National Technical Information Service (NTIS)

Although the Persian Gulf War was waged a decade ago, it should continue to be studied. Joint doctrine has not resolved many contentious issues raised during that conflict. Among them is whether a joint force commander (JFC) should be dual hatted as a ser...

D. J. McCarthy S. A. Medlin

2000-01-01

444

Genzyme\\/Geltex Pharmaceuticals Joint Venture  

Microsoft Academic Search

In March 1997, an executive vice president of Genzyme Corporation must develop the terms by which the $518 billion (revenue) firm will form a joint venture with a small biotechnology firm to make and market a new drug. The tasks for the decision-maker are to estimate the enterprise value of the new joint venture and to recommend how large an

Robert Bruner; Samuel Bodily; Pierre Jacquet

445

Integrated Dual Taper Waveguide Expansion Joint.  

National Technical Information Service (NTIS)

A TE sub (01) circular mode waveguide expansion joint, tapered transition device in which the expansion joint includes a linear tapered section, the greatest diameter of which does not exceed the cutoff diameter for the TE sub (02) spurious mode. A second...

J. M. Devan H. Milligan

1981-01-01

446

Stable, Thermally Conductive Fillers for Bolted Joints  

NASA Technical Reports Server (NTRS)

A commercial structural epoxy [Super Koropon (or equivalent)] has been found to be a suitable filler material for bolted joints that are required to have large thermal conductances. The contact area of such a joint can be less than 1 percent of the apparent joint area, the exact value depending on the roughnesses of the mating surfaces. By occupying the valleys between contact peaks, the filler widens the effective cross section for thermal conduction. In comparison with prior thermal joint-filler materials, the present epoxy offers advantages of stability, ease of application, and -- as a byproduct of its stability -- lasting protection against corrosion. Moreover, unlike silicone greases that have been used previously, this epoxy does not migrate to contaminate adjacent surfaces. Because this epoxy in its uncured state wets metal joint surfaces and has low viscosity, it readily flows to fill the gaps between the mating surfaces: these characteristics affect the overall thermal conductance of the joint more than does the bulk thermal conductivity of the epoxy, which is not exceptional. The thermal conductances of metal-to-metal joints containing this epoxy were found to range between 5 and 8 times those of unfilled joints.

LeVesque, Raymond J., II; Jones, Cherie A.; Babel, Henry W.

2003-01-01

447

United States Bone and Joint Decade  

MedlinePLUS

... have come together as part of the United States Bone and Joint Initiative (USBJI) to improve prevention of bone and joint disorders, and the quality of life for those affected. This goal begins with increased awareness, solid information and more research. The USBJI believes that ...

448

Sizing Mobility Readiness Spares Packages for Today's Warfighting Units.  

National Technical Information Service (NTIS)

As the Air Force transforms from a garrisoned force into a light expeditionary force, one area for restructuring is the manner in which mobility readiness spares packages (MRSPs) are managed and stocked. For a war tasking, thirty days supply is typically ...

C. M. Beckley

2007-01-01

449

Computer-Generated Forces at the Warfighter Training Research Division.  

National Technical Information Service (NTIS)

The Air Force Research Laboratory (AFRL) is exploring a new concept in its training called Distributed Mission Training (DMT) that will build toward the Air Force (AF) service-specific synthetic battlespace (SB). DMT is a shared training environment compr...

G. R. George J. Fuller

2000-01-01

450

Simulation of Thermal Effects of Microwave Radiation on Warfighters.  

National Technical Information Service (NTIS)

A thermal physiological computer model constructed using MathLab Simulink was adapted to predict the human thermal response to microwave beam radiation. The model simulates soldiers' responses to radio frequency radiation (RFR) from radar, communication a...

L. G. Berglund

2002-01-01

451

Improving Warfighters' Sustainment and Performance in Extreme Environmental Conditions.  

National Technical Information Service (NTIS)

In this project, we have developed and verified experimental rat models capable of reproducing physiological responses to extreme environmental conditions, such as simulated high-altitude hypoxia, acute heat stress, and chronic cold stress, comparable to ...

I. Cernak J. LaManna K. Kregel Z. Xun

2008-01-01

452

Ensuring the security of warfighters' satcom via programmable cryptographic devices  

Microsoft Academic Search

The National Security Agency's Cryptographic Modernization Initiative (CMI) has far reaching implications for the Information Assurance required on military satellites. The programmability tenet, one of six tenets defined in the National Security Agency (NSA)\\/Central Security Service (CSS) Policy 3-9, provides the greatest return on investment (ROI) by prolonging a satellite's useful life, but also presents the greatest technological risk. This

J. D. Bull

2005-01-01

453

Shear joint capability versus bolt clearance  

NASA Technical Reports Server (NTRS)

The results of a conservative analysis approach into the determination of shear joint strength capability for typical space-flight hardware as a function of the bolt-hole clearance specified in the design are presented. These joints are comprised of high-strength steel fasteners and abutments constructed of aluminum alloys familiar to the aerospace industry. A general analytical expression was first arrived at which relates bolt-hole clearance to the bolt shear load required to place all joint fasteners into a shear transferring position. Extension of this work allowed the analytical development of joint load capability as a function of the number of fasteners, shear strength of the bolt, bolt-hole clearance, and the desired factor of safety. Analysis results clearly indicate that a typical space-flight hardware joint can withstand significant loading when less than ideal bolt hole clearances are used in the design.

Lee, H. M.

1992-01-01

454

Total joint replacement in bunion surgery.  

PubMed

A preliminary report is given for total joint replacement arthroplasty utilizing a silicone-polyester prosthesis, in selected cases of destroyed metatarsophalangeal joints of the great toe. Fifty-three prostheses were implanted over a period from March 1971 to March 1977, with a minimum follow-up of one year. Overall results were good from the standpoint of pain relief and cosmetic correction, in severely destroyed and deformed joints. The essential aspects for successful prosthetic arthroplasty include proper seating of the prosthesis and complete realignment of the first ray, paralleling the adjacent metatarsals. On the basis of these preliminary results, it is concluded that there is a place for total joint prosthetic replacement in the surgical reconstruction of the painful, destroyed metatarsophalangeal joint of the great toe. PMID:83562

Kampner, S L

1978-01-01

455

Ochronosis of hip joint; a case report  

PubMed Central

Background Ochronosis is connective tissue manifestation of Alkaptonuria. Joint involvement specially hip and knee destruction is seen. The cartilage is pigmented and destroyed. It is interested for both pathologists and orthopedic surgeons. Case Presentation A 54 years old woman with hip fracture after simple falling is candidate for surgery, but, after skin and subcutaneous incision over deep fascia there was dark blue pigmentation which continues toward hip joint. After biopsy of soft tissues and bone, in another operation, we replace hip joint. Conclusion In this case, besides of cartilage destruction of hip joint, there was a lythic lesion of neck of femur which causes pathologic fracture of hip joint. We planned Total hip replacement instead of bipolar for her because of cartilage damage of acetabulum.

2009-01-01

456

Two-axis joint assembly and method  

NASA Technical Reports Server (NTRS)

In an embodiment, a two-axis joint that utilizes planar reactions to handle moments applied to the side of the joint thereby allowing the device to remain low profile and compact with minimal intrusion to the mounting surface of the two-axis joint. To handle larger moments, the diameter of the planar member can be increased without increasing the overall height of the joint assembly thereby retaining the low profile thereof. Upper and lower antifriction bearings may be positioned within a housing engage the planar member to reduce rotational friction. The upper and lower bearings and a hub which supports the planar member transfer forces produced by moments applied to the side of the joint so as to spread the forces over the area of the housing.

Le, Thang D. (Inventor); Lewis, James L. (Inventor); Carroll, Monty B. (Inventor)

2010-01-01

457

Joint interaction with embedded concretions: joint loading configurations inferred from propagation paths  

NASA Astrophysics Data System (ADS)

The interaction between propagating joints and embedded concretions in a Devonian black shale near Seneca Lake, NY, permits identification of the loading configurations responsible for two joint sets of different ages striking at nearly the same orientation. The earlier set consists of systematic joints cut by later Alleghanian joints of the Appalachian Plateau. The later set consists of non-systematic curving cross joints that abut these same Alleghanian joints. Field evidence shows that concretions functioned as stiff inclusions in a compliant black shale. As a consequence of this elastic contrast, local perturbations in the remote stress field persisted around the concretions during burial, tectonic deformation, and exhumation. These stress perturbations influenced joint propagation paths of both joint sets. Our conclusions about loading configurations are based on finite-element modeling of the effect of the local stress perturbation on concretion-modified joint propagation. Modeling shows that the local stress perturbation from a thermoelastic loading was responsible for deflecting cross joints away from concretions in a curved propagation path near the concretion. This load configuration also led to arrest of cross joints before they penetrated the shale-concretion interface. At greater distances from the concretion, the propagation path of cross joints was controlled by the contemporary tectonic stress field. The interface between concretions and the surrounding shale was strongly bonded, as indicated by the crossing of the interface by some of the systematic ENE joints. Higher compressive stress levels within the concretions relative to the shale suppressed joint development in the concretion, causing the arrest of those joints once they had driven across the interface and a short distance into the concretion. Numerical modeling shows that interface penetration by the systematic ENE joints is consistent with a fluid load, the same loading configuration postulated for the subsequent Alleghanian joints. The traces of the systematic ENE joints align on opposite sides of concretions, rather than curving toward the concretion as predicted by two-dimensional models of the fluid load. Co-planar traces are indicative of large, planar joints propagating in-plane around the concretion, making it energetically inefficient for the crack front to curve as it enters the local stress perturbation near the concretion. A fluid load for the systematic ENE joints came from high pore pressure during the pre-Alleghanian stages of burial of the Devonian Catskill delta complex.

McConaughy, David T.; Engelder, Terry

1999-11-01

458

Recent advances in shoulder research  

PubMed Central

Shoulder pathology is a growing concern for the aging population, athletes, and laborers. Shoulder osteoarthritis and rotator cuff disease represent the two most common disorders of the shoulder leading to pain, disability, and degeneration. While research in cartilage regeneration has not yet been translated clinically, the field of shoulder arthroplasty has advanced to the point that joint replacement is an excellent and viable option for a number of pathologic conditions in the shoulder. Rotator cuff disease has been a significant focus of research activity in recent years, as clinicians face the challenge of poor tendon healing and irreversible changes associated with rotator cuff arthropathy. Future treatment modalities involving biologics and tissue engineering hold further promise to improve outcomes for patients suffering from shoulder pathologies.

2012-01-01

459

Advanced Emissions Control Development Program  

SciTech Connect

The objective of the Advanced Emissions Control Development Program (AECDP) is to develop practical, cost-effective strategies for reducing the emissions of air toxics from coal-fired boilers. Ideally, the project aim is to effectively control air toxic emissions through the use of conventional flue gas cleanup equipment such as electrostatic precipitators (ESPS), fabric filters (baghouse), and wet flue gas desulfurization. Development work to date has concentrated on the capture of mercury, other trace metals, fine particulate and hydrogen chloride. Following the construction and evaluation of a representative air toxics test facility in Phase I, Phase II focused on the evaluation of mercury and several other air toxics emissions. The AECDP is jointly funded by the United States Department of Energy's Federal Energy Technology Center (DOE), the Ohio Coal Development Office within the Ohio Department of Development (oCDO), and Babcock& Wilcox-a McDermott company (B&W).

A.P.Evans; K.E. Redinger; M.J. Holmes

1998-04-01

460

Impact extractive fracture of jointed steel plates of a bolted joint  

NASA Astrophysics Data System (ADS)

This study is concerned with the development of a fracture criterion for the impact fracture of jointed steel plates of a bolted joint used in a car body. For the accurate prediction of crash characteristics of car bodies by computer-aided engineering (CAE), it is also necessary to examine the behavior and fracture of jointed steel plates subjected to impact loads. Although the actual impact fracture of jointed steel plates of a bolted joint used in cars is complicated, for simplifying the problem it might be classified into the shear fracture and the extractive fracture of jointed steel plates. Attention is given to the extractive fracture of jointed steel plates in this study. The extractive behavior and fracture of three kinds of steel plates used for cars are examined in experiments and numerical simulations. The impact extraction test of steel plates jointed by a bolt is performed using the one-bar method, together with the static test. In order to understand the mechanism of extractive fracture process of jointed steel plates, numerical simulations by a FEM code LS-DYNA are also carried out. The obtained results suggest that a stress-based fracture criterion may be developed for the impact extractive fracture of jointed steel plates of a bolted joint used in a car body.

Daimaruya, M.; Fujiki, H.; Ambarita, H.

2012-08-01

461

An Atypical Molecular Profile for Joint Development in the Avian Costal Joint  

PubMed Central

Development of synovial joints involves generation of cartilaginous anlagen, formation of interzones between cartilage anlagen, and cavitation of interzones to produce fluid filled cavities. Interzone development is not fully understood, but interzones are thought to develop from skeletogenic cells that are inhibited from further chondrogenic development by a cascade of gene expression including Wnt and Bmp family members. We examined the development of the rarely studied avian costal joint to better understand mechanisms of joint development. The costal joint is found within ribs, is morphologically similar to the metatarsophalangeal joint, and undergoes cavitation in a similar manner. In contrast to other interzones, Wnt14/9a, Gdf5, Chordin, Barx1, and Bapx1 are absent from the costal joint interzone, consistent with the absence of active ?-catenin and phosphorylated Smad 1/5/8. However Autotaxin and Noggin are expressed. The molecular profile of the costal joint suggests there are alternative mechanisms of interzone development.

Winslow, B. B.; Burke, A.C.

2010-01-01

462

Joint shear strength of FRP reinforced concrete beam-column joints  

NASA Astrophysics Data System (ADS)

An assessment of the joint shear strength of exterior concrete beam-column joints reinforced internally with Glass Fibre Reinforced Polymer (GFRP) reinforcements under monotonically increasing load on beams keeping constant load on columns is carried out in this study. Totally eighteen numbers of specimens are cast and tested for different parametric conditions like beam longitudinal reinforcement ratio, concrete strength, column reinforcement ratio, joint aspect ratio and influence of the joint stirrups at the joint. Also finite element analysis is performed to simulate the behaviour of the beam-column joints under various parametric conditions. Based on this study, a modified design equation is proposed for assessing the joint shear strength of the GFRP reinforced beam-column specimens based on the experimental results and the review of the prevailing design equations.

Saravanan, Jagadeesan; Kumaran, Ganapathy

2011-03-01

463

Advance Directives and Advance Care Planning: Report to Congress.  

National Technical Information Service (NTIS)

The report presents findings around five key areas: (1) Historical Perspectives on Advance Directives and Advance Care Planning; (2) Structure and Use of Advance Directives and Advance Care Planning; (3) Advance Directives and Advance Care Planning Among ...

2008-01-01

464

Advances in steam turbine technology for the power generation industry. PWR-Volume 26  

Microsoft Academic Search

This is a collection of the papers on advances in steam turbine technology for the power generation industry presented at the 1994 International Joint Power Generation Conference. The topics include advances in steam turbine design, application of computational fluid dynamics to turbine aerodynamic design, life extension of fossil and nuclear powered steam turbine generators, solid particle erosion control technologies, and

1994-01-01

465

Recent Advances in Polishing of Advanced Materials  

Microsoft Academic Search

This article discusses the recent advances in polishing of advanced materials. Ninety-five journal articles published in 2005–2007 are briefly introduced. The topics are advances in chemical mechanical polishing (CMP), fluids for polishing, modeling of polishing, polishing of brittle materials, robotic polishing, polishing with vibrations or beams, and friction in polishing processes. CMP is perhaps the hottest research topic in the

Z. W. Zhong

2008-01-01

466

Quiet Short-Haul Research Aircraft Joint Navy/NASA Sea Trials  

NASA Technical Reports Server (NTRS)

The Quiet Short-Haul Research Aircraft (QSRA) is a flight facility which Ames Research Center is using to conduct a broad program of terminal area and low-speed, propulsive-life flight research. A joint Navy/NASA flight research program used the QSRA to investigate the application of advanced propulsive-lift technology to the naval aircraft-carrier environment. Flight performance of the QSRA is presented together with the results or the joint Navy/NASA flight program. During the joint program, the QSRA operated aboard the USS Kitty Hawk for 4 days, during which numerous unarrested landings and free deck takeoffs were accomplished. These operations demonstrated that a large aircraft incorporating upper-surface-blowing, propulsive-life technology can be operated in the aircraft-carrier environment without any unusual problems.

Queen, S.; Cochrane, J.

1982-01-01

467

Joint Mid-Range General Purpose Force Planning.  

National Technical Information Service (NTIS)

The paper responds to a Joint Staff request for assistance in evaluating the effectiveness of the Joint planning process. Only mid-range general purpose force planning functions of the system are examined, including: The contribution of Joint force planni...

W. E. Hutchison

1975-01-01

468

44 CFR 150.5 - Joint Public Safety Awards Board.  

Code of Federal Regulations, 2010 CFR

...Office of the President. The Joint Board shall consist of ten...representatives serving on the Joint Board shall select one of their number to act as the chairperson. (b) Representatives on the Joint Board shall serve in...

2009-10-01

469

44 CFR 150.5 - Joint Public Safety Awards Board.  

Code of Federal Regulations, 2010 CFR

...Office of the President. The Joint Board shall consist of ten...representatives serving on the Joint Board shall select one of their number to act as the chairperson. (b) Representatives on the Joint Board shall serve in...

2010-10-01

470

76 FR 1975 - Disestablishment of United States Joint Forces Command  

Federal Register 2010, 2011, 2012, 2013

...Disestablishment of United States Joint Forces Command Presidential Documents Federal Register...Disestablishment of United States Joint Forces Command Memorandum for the Secretary of Defense...disestablishment of United States Joint Forces Command, effective on a date to be...

2011-01-11

471

21 CFR 888.3780 - Wrist joint polymer constrained prosthesis.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Wrist joint polymer constrained prosthesis. 888.3780...Devices § 888.3780 Wrist joint polymer constrained prosthesis. (a) Identification. A wrist joint polymer constrained prosthesis is a...

2010-04-01

472

49 CFR 236.59 - Insulated rail joints.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Insulated rail joints. 236.59 Section 236.59 Transportation...Systems Track Circuits § 236.59 Insulated rail joints. Insulated rail joints shall be maintained in condition to...

2013-10-01

473

49 CFR 234.235 - Insulated rail joints.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Insulated rail joints. 234.235 Section 234.235 Transportation... Maintenance Standards § 234.235 Insulated rail joints. Each insulated rail joint used to separate train detection...

2013-10-01

474

Advancement in the zone of calcified cartilage in osteoarthritic hands of patients detected by high definition macroradiography  

Microsoft Academic Search

Objective High definition macroradiography permits the advancement in the zone of calcified cartilage (described as a ZCC step) to be detected in osteoarthritic (OA) hand joints of patients. The pattern of their incidence and distribution was determined and compared to the joint space width (JSW) measurement.Design Macroradiographs, ×5 magnification, were obtained of the OA hands of 44 patients at baseline

N. Patel; C. Buckland-Wright

1999-01-01

475

Development of the Forward and Inverse Kinematic Models for the Advanced Deburring and Chamfering System (ADACS) Industrial Robot.  

National Technical Information Service (NTIS)

The kinematic model for the Advanced Deburring and Chamfering System (ADACS) robot, which determines the position and orientation of the manipulator end-effector for a given set of joint angles, is developed using the standardized Denavit-Hartenberg metho...

K. A. Stouffer

1992-01-01

476

Advance care directives  

MedlinePLUS

Living will; Power of attorney; DNR - advance directive; Do not resuscitate - advance directive ... of medical care you should receive. Using an advance directive, you can tell your doctor what medical treatment ...

477

SCIENCE BRIEF: ADVANCED CONCEPTS  

EPA Science Inventory

Research on advanced concepts will evaluate and demonstrate the application of innovative infrastructure designs, management procedures and operational approaches. Advanced concepts go beyond simple asset management. The infusion of these advanced concepts into established wastew...

478

Advance Care Planning PPT  

Cancer.gov

Describe barriers to completion of advance directives for African Americans Describe the steps of advance care planning. Utilize planning to help the patient put affairs in order and complete advance directives.

479

Cyclic Shear Resistance of Expanded Beam-Column Joint  

Microsoft Academic Search

This paper presents the strengthening technique for interior reinforced concrete beam-column joint based on joint expansion concept. The beam-column joint is expanded two-dimensionally by cast-in-situ concrete around the corners of the joint. Experiment has been conducted on interior beam-column specimens with expanded joint zone. Experimental results demonstrate a good performance of this method to upgrade the joint shear strength, energy

A. Pimanmas; P. Chaimahawan

2011-01-01

480

Sealed joint structure for electrochemical device  

DOEpatents

Several members make up a joint in a high-temperature electrochemical device, wherein the various members perform different functions. The joint is useful for joining multiple cells (generally tubular modules) of an electrochemical device to produce a multi-cell segment-in-series stack for a solid oxide fuel cell, for instance. The joint includes sections that bond the joining members to each other; one or more seal sections that provide gas-tightness, and sections providing electrical connection and/or electrical insulation between the various joining members. A suitable joint configuration for an electrochemical device has a metal joint housing, a first porous electrode, a second porous electrode, separated from the first porous electrode by a solid electrolyte, and an insulating member disposed between the metal joint housing and the electrolyte and second electrode. One or more brazes structurally and electrically connects the first electrode to the metal joint housing and forms a gas tight seal between the first electrode and the second electrode.

Tucker, Michael C; Jacobson, Craig P; De Jonghe, Lutgard C; Visco, Steven J

2013-05-21

481

Aksa plans polypropylene joint venture  

SciTech Connect

Turkish acrylic fiber maker Aksa (Yalova), part of the Akkok textile conglomerate, is studying construction of a world-scale polypropylene (PP) plant as part of its diversification plans. The company says it is engaged in discussions with three multinations in the PP business' on the possibility of a joint venture. One of the firms is understood to be Amoco. Aksa is looking at three possible locations for the 100,000 m.t.-150,000 m.t./year plant: Yalova, near Istanbul, where its existing plants are located; Zonguldak, on the Black Sea coast; and within one of the existing complexes or a new site belonging to state-owned Petkim. Aksa has not yet discussed that option with Petkim, which recently received approval to build a $2.5-billion petrochemical complex. The Aksa PP plant would cost about $100 million and would use propylene from world markets. The onstream date depends on Aksa's ability to link up with a foreign partner, but it hopes to complete the unit within three years. Turkey has only one PP plant, a 65,000-m.t./year Petkim unit at Aliaga. The domestic market is currently two to three times that amount and is growing. Petkim also plans a 200,000-m.t./year PP plant as part of its new complex.

Alperowicz, N.

1992-12-02

482

Joint Acoustic Propagation Experiment (JAPE)  

NASA Technical Reports Server (NTRS)

The Joint Acoustic Propagation Experiment (JAPE), performed under the auspices of NATO and the Acoustics Working Group, was conducted at White Sands Missile Range, New Mexico, USA, during the period 11-28 Jul. 1991. JAPE consisted of 220 trials using various acoustic sources including speakers, propane cannon, various types of military vehicles, helicopters, a 155mm howitzer, and static high explosives. Of primary importance to the performance of these tests was the intensive characterization of the atmosphere before and during the trials. Because of the wide range of interests on the part of the participants, JAPE was organized in such a manner to provide a broad cross section of test configurations. These included short and long range propagation from fixed and moving vehicles, terrain masking, and vehicle detection. A number of independent trials were also performed by individual participating agencies using the assets available during JAPE. These tests, while not documented in this report, provided substantial and important data to those groups. Perhaps the most significant feature of JAPE is the establishment of a permanent data base which can be used by not only the participants but by others interested in acoustics. A follow-on test was performed by NASA LaRC during the period 19-29 Aug. 1991 at the same location. These trials consisted of 59 overflights of supersonic aircraft in order to establish the relationship between atmospheric turbulence and the received sonic boom energy at the surface.

Carnes, Benny L.; Olsen, Robert O.; Kennedy, Bruce W.

1993-01-01

483

Improving Joint Properties of Friction Welded Joint of High Tensile Steel  

NASA Astrophysics Data System (ADS)

This report describes the improvements in the joint properties of friction welded joint of 780MPa class high tensile steel. Welded joint made by a continuous drive friction welding machine, the conventional method, had not obtained 100% joint efficiency despite applying forge pressure. This was due to the softening of the welded interface zone for heat input during braking times. Therefore, we developed a continuous drive friction welding machine with an electromagnetic clutch to prevent heat input during braking time. We proposed the process as “The Low Heat Input Friction Welding Method (the LHI method).” In this case, the joint had the same tensile strength as the base metal at friction time when the friction torque reached the initial peak torque. That is, the welded joint obtained 100% joint efficiency by using only the friction stage up to the initial peak torque without the forge (upsetting) stage, despite the existence of a slightly softened region adjacent to the welded interface. Furthermore, the softened region was hardly generated when this joint was made by applying forge pressure at the initial peak torque. In conclusion, a welded joint of high tensile steel made by only the friction stage of the LHI method had excellent joint properties. The LHI method has a lot of advantages for joining such materials as super fine grain steel with which conventional fusion welding processes have difficulty.

Kimura, Masaaki; Kusaka, Masahiro; Seo, Kenji; Fuji, Akiyoshi

484

[An endoapparatus for restoration of hip joint].  

PubMed

The possibility of prolonging the anatomic and functional longevity of joints in young patients with coxarthrosis deformans under conditions of long-term unloading using a submersible distraction device is considered. A submersible endoapparatus for restoration of hip joint is described. Its functional capabilities as an unloading device were corroborated by experimental testing. Clinical examples illustrated with X-ray photographs demonstrate the possibility of long-term unloading of the injured joint and postponement of endoprosthesis replacement in young patients by 20-25 years. It is suggested to use the developed method for organ-sparing surgery in young working-age patients. PMID:18688939

Lapinskaia, V S; Gatiatulin, R R; Trubnikov, V I; Velichko, M V; Froliakin, T V; Kovalenko, A E; Froliakina, L A

2008-01-01

485