A High-Level View of Turnkey Model Contracts for the International Plant Engineering Industry

2015 ◽  
Author(s):  
Anita Erbe
Keyword(s):  
Engineering Industry ◽  
High Level ◽  
International Plant

Ultrasonic Stress Measurement in Welded Component by Using Lcr Waves: Analysis of the Microstructure Effect

2006 ◽  
Vol 524-525 ◽  
pp. 453-458 ◽  
Author(s):  
H. Qozam ◽  
J. Hoblos ◽  
G. Bourse ◽  
C. Robin ◽  
Henri Walaszek ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Acoustic Waves ◽  
Stress Measurement ◽  
Ultrasonic Method ◽  
Engineering Industry ◽  
Hole Drilling ◽  
Melted Zone ◽  
Wave Technique ◽  
High Level ◽  
Microstructure Effect

Welding, which is a largely used process in the mechanical manufacturing, well known to induce high-level residual stresses. The level of residual stresses is of great importance for the lifetime of welded components used in mechanical engineering industry. The use of the ultrasonic method for the evaluation of the residual stresses is based on the acoustoelastic effect, which refers to the change in velocity of the acoustic waves propagating in a strained solid. In the case of welding, the microstructure modifications observed in the heat affected zone (HAZ) and the melted zone (MZ) also induce variations of the velocity of the acoustic waves. The superposition of the two effects, stresses and microstructure, results in over-estimating the levels of stresses. This work which was completed in collaboration with CETIM is a contribution to this problem. The experimental study was carried out on P460HLE and P265 steels welded sheets. The results obtained by the ultrasonic Lcr wave technique were compared with those obtained by the hole drilling technique. This work confirms the possibility of evaluating the residual stresses induced by welding using the ultrasonic method.

scholarly journals Proposed solutions of accidents resulting use of 3D coordinate technology in the civil engineering industry

2021 ◽  
Vol 331 ◽  
pp. 02018
Author(s):  
H. R. Ali Amr Salah ◽  
Lilik Ariyanto ◽  
H. R. Ali Salah
Keyword(s):  
Structural Engineering ◽  
Dynamic Balance ◽  
Engineering Industry ◽  
Appropriate Behavior ◽  
Equipment Operation ◽  
Tall Structures ◽  
Engineering Standards ◽  
And Performance ◽  
High Level

Mechanical engineers have adapted 3D coordinate technology in the design and implementation of cranes to accelerate the production of construction industries, especially tall structures such as buildings and bridges. Structural engineering projects such as buildings, infrastructure, and bridges are central to the development of human civilization. However, it is also a source of some types of accidents and even disasters, which will be referred to in this paper as structural engineering disasters. This paper discusses the concept, types, and characteristics of structural engineering disasters, especially those that talk about the use of high-level 3D coordinate equipment (tower or mobile cranes) and ways to mitigate them. The accidents in practice occur due to dynamic balance defects during equipment operation, which is usually due to incorrect selection or behavior on the construction site, installation, maintenance, operation, or ambient environmental conditions. Structural engineering disasters occur frequently and globally because they are closely related to human behavior and performance. This paper confirms that solutions can be found entrepreneurial to manage the situation to reach the appropriate operation to mitigate the accidents, through implementing the proposed administrative and engineering recommendations related to an accurate scientific method to meet these challenges. The engineering recommendations are based on ensuring the proper implementation of maintenance, operation, and calibration under the engineering standards. While the administrative recommendations focus on ensuring the follow-up of the safety procedures for implementing maintenance programs and the appropriate behavior of operator and scientifically signal person to meet these challenges.

Solution for Improvement the Thermal Comfort inside the Automobile Passenger Compartment

2016 ◽  
Vol 822 ◽  
pp. 118-122
Author(s):  
Sorinel Gicu Talif ◽  
Edward Rakosi ◽  
Bogdan Condurache ◽  
Cosmin Teodorescu
Keyword(s):  
Thermal Comfort ◽  
Optimal Solution ◽  
Engineering Industry ◽  
Passenger Compartment ◽  
Air Velocity ◽  
Experimental Stand ◽  
Tremendous Importance ◽  
High Level ◽  
Comfort Parameters ◽  
Parameter Values

Raising the thermal comfort inside the car is a primary task of the car manufacturers and therefore the process of designing an optimal solution to improve the parameters of the thermal comfort is considered to have a tremendous importance. Considering this, in this paper we aim to adapt within the car a system of air conditioning which is used in the classical way, especially in the civil engineering industry. The proposed solution consists of designing a chamber used for the fluid preparation. The system includes some preset modules of the parameter values for the thermal comfort depending on climate and season, and also the possibility to customize the standard settings with the preferred ones of the vehicle occupants. This way it will be maintained a high level of thermal comfort and also the risks of accidents will be reduced (the driver can focus on the driving act instead of setting the parameters for thermal comfort). The paper also shows an experimental stand which can be used to study the thermal comfort parameters such as air temperature, humidity and air velocity and also to collect the results.

Transcription factor/DNA interactions visualized by electron spectroscopic imaging

1992 ◽  
Vol 50 (1) ◽  
pp. 450-451
Author(s):  
David P. Bazett-Jones ◽  
Mark L. Brown
Keyword(s):  
Transcription Factor ◽  
Dna Sequences ◽  
Transcription Initiation ◽  
Molecular Mechanisms ◽  
Phosphorus Content ◽  
Spectroscopic Imaging ◽  
Electron Spectroscopic Imaging ◽  
Dna Backbone ◽  
Two Parameters ◽  
High Level

A multisubunit RNA polymerase enzyme is ultimately responsible for transcription initiation and elongation of RNA, but recognition of the proper start site by the enzyme is regulated by general, temporal and gene-specific trans-factors interacting at promoter and enhancer DNA sequences. To understand the molecular mechanisms which precisely regulate the transcription initiation event, it is crucial to elucidate the structure of the transcription factor/DNA complexes involved. Electron spectroscopic imaging (ESI) provides the opportunity to visualize individual DNA molecules. Enhancement of DNA contrast with ESI is accomplished by imaging with electrons that have interacted with inner shell electrons of phosphorus in the DNA backbone. Phosphorus detection at this intermediately high level of resolution (≈lnm) permits selective imaging of the DNA, to determine whether the protein factors compact, bend or wrap the DNA. Simultaneously, mass analysis and phosphorus content can be measured quantitatively, using adjacent DNA or tobacco mosaic virus (TMV) as mass and phosphorus standards. These two parameters provide stoichiometric information relating the ratios of protein:DNA content.

Advances in Stem Instrumentation for Biology

1990 ◽  
Vol 48 (1) ◽  
pp. 362-363
Author(s):  
J. S. Wall
Keyword(s):  
Scanning Transmission Electron Microscope ◽  
Carbon Films ◽  
Specimen Preparation ◽  
Material Deposition ◽  
Active User ◽  
Percent Improvement ◽  
Scanning Transmission ◽  
The Moment ◽  
Film Substrate ◽  
High Level

The forte of the Scanning transmission Electron Microscope (STEM) is high resolution imaging with high contrast on thin specimens, as demonstrated by visualization of single heavy atoms. of equal importance for biology is the efficient utilization of all available signals, permitting low dose imaging of unstained single molecules such as DNA.Our work at Brookhaven has concentrated on: 1) design and construction of instruments optimized for a narrow range of biological applications and 2) use of such instruments in a very active user/collaborator program. Therefore our program is highly interactive with a strong emphasis on producing results which are interpretable with a high level of confidence.The major challenge we face at the moment is specimen preparation. The resolution of the STEM is better than 2.5 A, but measurements of resolution vs. dose level off at a resolution of 20 A at a dose of 10 el/A2 on a well-behaved biological specimen such as TMV (tobacco mosaic virus). To track down this problem we are examining all aspects of specimen preparation: purification of biological material, deposition on the thin film substrate, washing, fast freezing and freeze drying. As we attempt to improve our equipment/technique, we use image analysis of TMV internal controls included in all STEM samples as a monitor sensitive enough to detect even a few percent improvement. For delicate specimens, carbon films can be very harsh-leading to disruption of the sample. Therefore we are developing conducting polymer films as alternative substrates, as described elsewhere in these Proceedings. For specimen preparation studies, we have identified (from our user/collaborator program ) a variety of “canary” specimens, each uniquely sensitive to one particular aspect of sample preparation, so we can attempt to separate the variables involved.

A Questionnaire Survey of Current Rehabilitation Practices for Adults With Normal Hearing Sensitivity Who Experience Auditory Difficulties

2020 ◽  
Vol 29 (4) ◽  
pp. 738-761
Author(s):  
Tess K. Koerner ◽  
Melissa A. Papesh ◽  
Frederick J. Gallun
Keyword(s):  
Hearing Aids ◽  
Questionnaire Survey ◽  
Patient Population ◽  
Clinical Care ◽  
Normal Hearing ◽  
Auditory Training ◽  
Training Methods ◽  
Hearing Sensitivity ◽  
Considerable Benefit ◽  
High Level

Purpose A questionnaire survey was conducted to collect information from clinical audiologists about rehabilitation options for adult patients who report significant auditory difficulties despite having normal or near-normal hearing sensitivity. This work aimed to provide more information about what audiologists are currently doing in the clinic to manage auditory difficulties in this patient population and their views on the efficacy of recommended rehabilitation methods. Method A questionnaire survey containing multiple-choice and open-ended questions was developed and disseminated online. Invitations to participate were delivered via e-mail listservs and through business cards provided at annual audiology conferences. All responses were anonymous at the time of data collection. Results Responses were collected from 209 participants. The majority of participants reported seeing at least one normal-hearing patient per month who reported significant communication difficulties. However, few respondents indicated that their location had specific protocols for the treatment of these patients. Counseling was reported as the most frequent rehabilitation method, but results revealed that audiologists across various work settings are also successfully starting to fit patients with mild-gain hearing aids. Responses indicated that patient compliance with computer-based auditory training methods was regarded as low, with patients generally preferring device-based rehabilitation options. Conclusions Results from this questionnaire survey strongly suggest that audiologists frequently see normal-hearing patients who report auditory difficulties, but that few clinicians are equipped with established protocols for diagnosis and management. While many feel that mild-gain hearing aids provide considerable benefit for these patients, very little research has been conducted to date to support the use of hearing aids or other rehabilitation options for this unique patient population. This study reveals the critical need for additional research to establish evidence-based practice guidelines that will empower clinicians to provide a high level of clinical care and effective rehabilitation strategies to these patients.

805: High-Level Cyclin D1 is Associated with High Gleason Grade and Predicts Worse Biochemical-Free Survival in Prostate Cancer

2006 ◽  
Vol 175 (4S) ◽  
pp. 260-260
Author(s):  
Rile Li ◽  
Hong Dai ◽  
Thomas M. Wheeler ◽  
Anna Frolov ◽  
Gustavo Ayala
Keyword(s):  
Prostate Cancer ◽  
Cyclin D1 ◽  
Gleason Grade ◽  
Free Survival ◽  
High Level
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