Comparison of Various Test Methods for Assessing the Long Term Fluid Migration Potential for Sealants

2009 ◽  
pp. 210-210-9
Author(s):  
R Snyder ◽  
R Badour ◽  
LD Carbary ◽  
AT Wolf
Keyword(s):  
Test Methods ◽  
Fluid Migration ◽  
Migration Potential

scholarly journals Career Satisfaction Based on Trust and Proactive Personality

2020 ◽  
Vol 9 (1) ◽  
pp. 35-45
Author(s):  
Iwan Sunardi ◽  
Vini Wiratno Putri
Keyword(s):  
Career Satisfaction ◽  
Analytical Data ◽  
Sampling Technique ◽  
Test Methods ◽  
Validity And Reliability ◽  
Career Needs ◽  
Relationship Of ◽  
The Relationship ◽  
The City

The purpose of this study was to examine the effect of the trust of co-workers and proactive personalities on career satisfaction by exchanging leader-members as mediation on employees of bus assembly companies in the city of Semarang. Career satisfaction is the phase in which employees’ long-term career needs are aligned with what they get while working. Employees will always look for opportunities and trust in the organization and people who will help them in achieving career satisfaction. The sampling method uses a purposive sampling technique in the category of staff and foreman employees who have worked for more than five years with a sample of 160 employees. The analytical data in this study uses descriptive statistical test methods, instinctual tests include validity and reliability, and hypothesis testing. The tool used to test in this study uses SmartPLS 3.0. The results of this study, colleague trust cannot directly influence career satisfaction. However, it can be mediated by the exchange of leader members and produce significant influence. For further researchers, they can re-examine the relationship of coworkers’ trust with career satisfaction. And can expand the object of research or respondents under study.

scholarly journals Fault-controlled dolomitization in the Montagna dei Fiori Anticline (Central Apennines, Italy): record of a dominantly pre-orogenic fluid migration

Solid Earth ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 1355-1383 ◽  
Author(s):  
Mahtab Mozafari ◽  
Rudy Swennen ◽  
Fabrizio Balsamo ◽  
Hamdy El Desouky ◽  
Fabrizio Storti ◽  
...  
Keyword(s):  
Field Work ◽  
High Amplitude ◽  
Lower Jurassic ◽  
Upper Triassic ◽  
Fluid Migration ◽  
Central Apennines ◽  
Elevated Salinity ◽  
Siliciclastic Rocks

Abstract. The Lower Jurassic platform and basinal deposits exposed in the Montagna dei Fiori Anticline (Central Apennines, Italy) are pervasively affected by dolomitization. Based on the integration of field work, petrography, and geochemistry, two fault-related dolomitization events were recognized and interpreted as having occurred before and during the Apenninic orogeny. Fluid inclusion analysis indicates moderate to elevated salinity values of 3.5 to 20.5 and 12.8 to 18.6 eq. wt % NaCl in the first and the second event, respectively. The estimated salinities, in combination with δ18O values and 87Sr∕86Sr ratios, suggest significant involvement of evaporitic fluids in both events, most likely derived from the underlying Upper Triassic Burano Formation. In addition, the 87Sr∕86Sr ratios up to 0.70963 suggest the circulation of deep-sourced fluids that interacted with siliciclastic rocks and/or the crystalline basement during the dolomitization events. Two major dolomite types (D1 and D2) were recognized as pertaining to the first event, both postdated by high-amplitude bed-parallel stylolites, supporting a syn-burial pre-layer-parallel shortening dolomitization. A possible geodynamic framework for this dolomitization event is Early Jurassic to Late Jurassic rift-related extensional tectonism. The second dolomitization event (D3, D4, and D5) is characterized by a temperature upturn (up to 105 ∘C) and interpreted as associated with the inflow of hydrothermal fluids, possibly related to major changes in the permeability architecture of faults during early- to syn-thrusting and folding activity. Based on the timing of deformation in the Montagna dei Fiori Anticline, the second dolomitization event likely occurred in Late Miocene to Pliocene times. The findings regarding characteristics and timing of dolomitization here illustrates the long-term controlling role of the evaporitic detachments in the dolomitization process. This study shows that the Mg-rich fluids that were most likely derived from evaporites may prime the tectonically involved successions for repeated dolomitization, and hence the formation of potential reservoirs during sequential tectonic modifications (extensional vs. compressional).

A New Approach to Fit Bearing Performance to Advanced Gas Engine Technology

2002 ◽  
Author(s):  
Thomas Rumpf ◽  
Johannes Humer ◽  
Elisabeth Schneiderbauer ◽  
Michael Putz
Keyword(s):  
Life Time ◽  
Test Methods ◽  
Hydrodynamic Performance ◽  
Test Procedures ◽  
Gas Engine ◽  
Simulation Tools ◽  
Bearing Materials ◽  
Engine Components ◽  
Long Term Behavior

Gas engines get an increasing market share compared to four stroke engines, especially in the field of energy systems. Under these special firing conditions engine components are stressed differently than in traditional diesel engines. This particularly is the case for bearings. In order to supplement the knowledge base for bearing performance under these aggravated conditions, special test methods have been developed to find out reasons for premature bearing failure characteristics. In combination with experience from the long term behavior of different bearing types in different gas engine applications, this data allows the development of improved bearing materials as well as bearing designs. Using this knowledge in combination with advanced simulation tools, a bearing supplier can offer assistance to select adequate bearing designs, give a life time prediction and in case of unexpected phenomena, redesign recommendations. The paper presents reasons and influences for life time limitations as well as different risk factors for available bearing types and situations. Based on field experience and data from the advanced bearing test procedures, values for bearing performance are given. Data for hydrodynamic performance, tribological properties and emergency running behavior, cavitation resistance, wear resistance and last, but not least corrosion resistance against active sulfur and halogens will be given for traditional and newly developed bearing materials. A short view into the future will finish the presentation.

scholarly journals Mechanical Behavior of Syntactic Foams for Deep Sea Thermally Insulated Pipeline

2010 ◽  
Vol 24-25 ◽  
pp. 97-102 ◽  
Author(s):  
Dominique Choqueuse ◽  
Peter Davies ◽  
Dominique Perreux ◽  
Laurent Sohier ◽  
Jean Yves Cognard
Keyword(s):  
Syntactic Foam ◽  
Test Methods ◽  
Shear Loading ◽  
Hydrostatic Compression ◽  
Shear Stresses ◽  
Syntactic Foams ◽  
Oil Exploitation ◽  
Service Behavior ◽  
Offshore Oil

Ultra Deep offshore oil exploitation (down to 3000 meters depth) presents new challenges to offshore engineering and operating companies. Flow assurance and particularly the selection of insulation materials to be applied to pipe lines are of primary importance, and are the focus of much industry interest for deepwater applications. Polymeric and composite materials, particularly syntactic foams, are now widely used for this application, so the understanding of their behavior under extreme conditions is essential. These materials, applied as a thick coating (up to 10-15 cm), are subjected in service to: - high hydrostatic compression (up to 30 MPa) - severe thermal gradients (from 4°C at the outer surface to 150°C at the inner wall), and to high bending and shear stresses during installation. Damageable behavior of syntactic foam under service conditions has been observed previously [1] and may strongly affect the long term reliability of the system (loss of thermal properties).This study is a part of a larger project aiming to model the in-service behavior of these structures. For this purpose it is important to identify the constituent mechanical properties correctly [2, 3]. A series of tests has been developed to address this point, which includes: - hydrostatic compression - shear loading using a modified Arcan fixture This paper will describe the different test methods and present results obtained for different types of syntactic foams.

Laboratory Testing of the Corrosion of Waste Glasses in Aqueous Environments - Effects of Experimental Parameters

1993 ◽  
Vol 333 ◽  
Author(s):  
AA. Barkatt ◽  
Jing C. Sang ◽  
S.-B. Xing ◽  
Yan Guo ◽  
I. L. Pegg ◽  
...  
Keyword(s):  
Test Methods ◽  
Waste Form ◽  
Test Duration ◽  
Leach Rate ◽  
Aqueous Environments ◽  
Experimental Parameters ◽  
Sensitive Function ◽  
Nuclear Waste Forms ◽  
Critical Aspects

ABSTRACTMany types of procedures have been developed for testing of the chemical durability of nuclear waste forms. These procedures differ from each other in critical aspects, such as duration, replenishment or non-replenishment of the leachates, and S/V ratio. As a result, different answers to basic questions, such as how waste-form leachability depends on its chemical composition, are obtained when different test methods are used. Furthermore, the possibility that some glasses may exhibit a leach rate excursion within the test period causes the composition dependence to be an even more sensitive function of test duration and of leachant replenishment. These factors also complicate the use of test data for the prediction of long-term waste form behavior.

A New Cyclic Impact Test Instrument and Methodology for Hand-Struck Tools

2003 ◽  
Author(s):  
J. L. Glancey ◽  
P. Popper ◽  
M. Mitch ◽  
P. Truitt ◽  
N. Nasr ◽  
...  
Keyword(s):  
Test Methods ◽  
Standard Test ◽  
Performance Characteristics ◽  
Work Piece ◽  
Testing Device ◽  
Impact Measurement ◽  
Subsequent Work ◽  
Noise Measurements ◽  
Improved Performance

The use of hand-struck tools is still a necessary job function for technicians in several industries throughout the world. Despite the importance of these tools, evolving concerns regarding the detrimental effects of their long-term use continue to grow. Repetitive motion injuries, nerve damage of the hands and arms, and hearing loss are some of the problems that continue to afflict users of these types of tools. Although hammer-tool systems are relatively simple mechanical systems that have required very little improvement historically, the growing concerns associated with their use necessitate a thorough evaluation of current tool designs. In addition, the introduction of new and modified tools with improved performance characteristics will be essential to maintaining their long term, effective use in the workplace. Currently, no standard test methods exist to assess the performance characteristics of hand-struck tools. This makes evaluations and comparisons very difficult since performance characteristics are significantly influenced by the user of the tool. As a result, for the purposes of assessing the performance of current hammer-tool systems as well as evaluating alternate designs, a new testing device for hand-struck tools was developed. The device is designed to simulate the approximate cyclic kinematic motion of a user repeatedly hitting a tool with a conventional hammer. A computer controller automates the striking and return stroke actions, and the resulting impact velocity and force exerted by the hammer are adjustable and approximate the performance of a human. For the purpose of development, the testing device was designed to accept steel hand-struck chisels. As configured, a chisel is placed in the device and used to shear a standard, replaceable work piece. The key output of this test is the number of impacts needed to fail the standard piece. Other features integrated into the device include a load cell under the work piece to capture the force exerted during a hammer impact, measurement of the hammer velocity at impact, noise measurements, and an automatic counter to record the number of hammer impacts required to fail the work piece. Preliminary tests with standard, conventional chisels indicate the device is capable of failing a standard 6.5 mm steel drill rod work piece in the same number of hammer blows as an experienced chisel user. Subsequent work will focus on characterizing and improving the properties of hammer-chisel systems relevant to the detrimental effects associated with their long term use.

scholarly journals Applying laboratory methods for durability assessment of vitrified material to archaeological samples

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Lorena Nava-Farias ◽  
James J. Neeway ◽  
Michael J. Schweiger ◽  
José Marcial ◽  
Nathan L. Canfield ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Iron Age ◽  
Test Methods ◽  
Durability Test ◽  
Laboratory Methods ◽  
Near Surface ◽  
Glass Corrosion ◽  
Durability Assessment ◽  
Nuclear Waste Forms

AbstractLaboratory testing used to assess the long-term chemical durability of nuclear waste forms may not be applicable to disposal because the accelerated conditions may not represent disposal conditions. To address this, we examine the corrosion of vitrified archeological materials excavated from the near surface of a ~1500-year old Iron Age Swedish hillfort, Broborg, as an analog for the disposal of vitrified nuclear waste. We compare characterized site samples with corrosion characteristics generated by standard laboratory durability test methods including the product consistency test (PCT), the vapor hydration test (VHT), and the EPA Method 1313 test. Results show that the surficial layer of the Broborg samples resulting from VHT displays some similarities to the morphology of the surficial layer formed over longer timescales in the environment. This work provides improved understanding of long-term glass corrosion behavior in terms of the thickness, morphology, and chemistry of the surficial features that are formed.

scholarly journals DETERMINATION OF PERSONAL SIGNIFICANCE AND CONTENT OF VALUES

2020 ◽  
Vol 8 (4) ◽  
pp. 445-455
Author(s):  
A.M. Lesin ◽  
Keyword(s):  
Semantic Content ◽  
Test Methods ◽  
Self Reflection ◽  
Personal Significance ◽  
Scientific Schools ◽  
The Social ◽  
Psychological Structure ◽  
Long Term Experience

This article poses a problem associated with the difficulties of studying and identifying the motivational potential of the value sphere, as well as the discrepancy between the content of the same values in different people or in the same, but at different times. The article describes the results of a theoretical search associated with different approaches to understanding and studying values in different sciences and scientific schools. Also, the main variants of classifications of values and the ways of their formation in the direction of the personality in the process of ontogenesis are determined. The difficulties associated with the study of values with the help of tests, taking into account the social desirability and expectation of answers or the lack of self-reflection ability of the respondents, are described. The modern non-test methods and approaches to the study of the value sphere are analyzed, which make it possible to identify personally significant values and the level of their motivational potential. A method is proposed for determining the personal significance of values , as opposed to their reflec tive representation, using the magnitude of the conflict between the significance and the implementation of values. The long-term experience of using this method among various respondents is described. Variants of the destructive level of personal significance of some values are demonstrated. The possibilities and examples of the study of values in relation to the psychological structure of initiative are shown. The possibilities of content analysis in determining the content are illustrated, examples of different semantic content of the same values are given. It is concluded that, in addition to classical test methods, it is necessary to apply such methods as well, which will help to distinguish between value ideas and personal values proper, as well as to determine their content.

Sign in / Sign up

Export Citation Format

Share Document