Relevant bibliographies by topics / Shell tool

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Shell tool'

Author: Grafiati
Published: 10 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Shell tool.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Shell tool"

1

He, Geng Huang, Xian Li Liu, and Fu Gang Yan. "Research on the High-Efficiency Turning Tool for Rough Machining of Large Hydrogenated Cylindrical Shell Forging." Key Engineering Materials 567 (July 2013): 53–58. http://dx.doi.org/10.4028/www.scientific.net/kem.567.53.

Full text
Abstract:
The large hydrogenated cylindrical shell is an important part of petrochemical pressure vessels. From the macroscopic aspects, the influence that the surface defects of the large hydrogenated cylindrical shells forging blank has on the high efficiency machining was analyzed in the paper firstly. Then, through the chemical point of view, the new chemical components of the shells material were known, and the shells material physical properties were also dissected. The phenomenon of compatibility between the Co element which is in tools material and the siderophile element of the 2.25Cr-1Mo-0.25V steel which is the material of the large hydrogenated cylindrical shell was found. Therefore, the technical performance requirements of the heavy-duty turning tool which is to achieve the goal of high efficiency cutting were put forward. Through researching the chemical and the physical properties of the shell, the new high-efficiency turning tool was designed from the aspects of the tools material and the tools geometric structure. Finally, the comparative test between the new heavy-duty turning tool which was named XF8 and the YT5 tool which was being used in factory was made, and by way of comparing both the service life and the chip-breaking performance of XF8 with YT5s, the test results showed that the XF8 met the requirements of high-efficiency heavy-duty turning, and the feasibility of the tools design scheme was further verified.
APA, Harvard, Vancouver, ISO, and other styles
2

van Berkel, J., U. Kaymak, G. Kulawksi, T. Weisenborn, and M. White. "Gas field planning tool." Netherlands Journal of Geosciences - Geologie en Mijnbouw 80, no. 1 (April 2001): 103–5. http://dx.doi.org/10.1017/s0016774600022204.

Full text
Abstract:
AbstractGas Field Planning Tool (GFPT) was developed in 1990 by the Shell Group of Companies to fill the need for a tool for gas field planning and development using deterministic subsurface and surface models. Main initiators were Shell Canada, NAM (the Netherlands), Shell Expro (UK) and BSP (Shell Brunei), as these companies are major gas producers.Shell Companies now have several years experience with using the GFPT. Application ranges from simple single field models to corporate-level models with a large number of gas reservoirs and wells. Shell companies now using GFPT models are Shell Expro (UK), BSP (Brunei), SSB (Malaysia), Shell Canada, SPDC (Nigeria), SDA (Australia), Woodside (Australia), PDO (Oman), NAM (the Netherlands), New Business Development (e.g. Lunar Project) and in future also Shell Egypt.NAM currently has a GFPT model for the Anjum field in Friesland and for the Ten Arlo field in the north of Holland.GFPT is currently being migrated to an HFPT (Hydrocarbon Field Planning Tool), which can also be used for planning of condensate, oil and water developments and for control of hydrocarbon compositions in the network using PVT de-lumping at the well head (e.g. for LNG plants) and optimisation techniques (linear, non-linear or based on bean-back lists).
APA, Harvard, Vancouver, ISO, and other styles
3

Savazzi, Enrico. "Theoretical shell morphology as a tool in constructional morphology." Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 195, no. 1-3 (February 14, 1995): 229–40. http://dx.doi.org/10.1127/njgpa/195/1995/229.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Wu, Ming Yang, Bo Wang, Yao Nan Cheng, Y. Tian, Yong Bin Gao, and F. G. Yan. "Study Chip Breaking Experimental and Optimal Design of Tool for Machining Cylindrical Shell Material." Materials Science Forum 800-801 (July 2014): 197–202. http://dx.doi.org/10.4028/www.scientific.net/msf.800-801.197.

Full text
Abstract:
Large cylindrical shells are widely used in many areas of aerospace, petroleum chemical industry and nuclear power, etc. The main material of large cylindrical shells is 2.25Cr-1Mo-0.25V. In the process of heavy-duty cutting cylindrical shell material, the removal rate is high, and machine condition is rough, because the viscosity of big cylindrical shell material, the large chips not easy to be broken, and the tool and workpiece often entangled affect the machining efficiency. Researh and development to apply heavy cutting under the condition of high performance cutting tool has great practical significance, because of at the same time for heavy cutting tool is less in china. This paper uses the cutting performance experiment aiming to cylindrical shell material used in different three-dimensional groove blades and studies the range of different blades broken chips and the influence of three-dimensional groove on breaking effect. The chips form of cutting cylindrical shell material is summarized. And chip-breaking groove of the best performance is optimized. The paper designs of the new heavy-duty vehicles blade well and vertfies the good effect of the new heavy-duty cutting the breaker by the results of 3 d finite element simulation. The paper provides basis for designing heavy-duty cutting.
APA, Harvard, Vancouver, ISO, and other styles
5

Darma, R., and A. Amri. "A Simple Candlenut Shell Carbonization Tool." IOP Conference Series: Materials Science and Engineering 506 (April 15, 2019): 012052. http://dx.doi.org/10.1088/1757-899x/506/1/012052.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Verdegaal, S., S. R. Troelstra, C. J. Beets, and H. B. Vonhof. "Stable isotopic records in unionid shells as a paleoenvironmental tool." Netherlands Journal of Geosciences - Geologie en Mijnbouw 84, no. 4 (December 2005): 403–8. http://dx.doi.org/10.1017/s0016774600021211.

Full text
Abstract:
AbstractStable oxygen and carbon isotope studies were performed on unionid shells from Rhine and Meuse rivers. Results show that the characteristic isotopic signature of each river is well documented in the shells with average δ18O values of ∼9.00‰ for the Rhine specimens and of 6.5‰ for the Meuse unionid. The average δ18O values of the shell material corresponds to the average δ18O of the to rivers and thus identifies Rhine or Meuse sedimentary sequences. All δ18O records show distinct seasonality, which may be used to reconstruct past riverconditions
APA, Harvard, Vancouver, ISO, and other styles
7

O'Day, Sharyn Jones, and William F. Keegan. "Expedient Shell Tools from the Northern West Indies." Latin American Antiquity 12, no. 3 (September 2001): 274–90. http://dx.doi.org/10.2307/971633.

Full text
Abstract:
Our work in the Bahamas, Turks and Caicos, Haiti, and Jamaica has revealed significant patterning in apparently unretouched molluscan shell objects. In the present paper we conclude that repetitive patterns in shell breakage, especially of queen conch (Strombus gigas), reflect the specific manufacture of forms for use as expedient tools. Expedient tools exhibit only primary modification in which a portion of the source material is removed and shaped, but there is no specific evidence for the preparation of a work edge. Alternatively, expedient tools may display no modification of the raw material except that produced through use. We hypothesize that through controlled breakage large S. gigas and other mollusk shells were modified to create numerous smaller pieces for everyday domestic activities. The key factor here is human intent. Experiments clearly demonstrate that controlled breakage of adult shells produces predictable fragments. Among these are forms that occurred in prehistoric sites throughout the West Indies; many of these forms also exhibit signs of use wear. This type of regional comparison and analysis is important for all archaeologists who work in coastal settings. It is only through such general studies that the sample size is sufficient to facilitate a more complete reconstruction of the aboriginal tool kit.
APA, Harvard, Vancouver, ISO, and other styles
8

Melaibari, Ammar, Ahmed Amine Daikh, Muhammad Basha, Ahmed Wagih, Ramzi Othman, Khalid H. Almitani, Mostafa A. Hamed, Alaa Abdelrahman, and Mohamed A. Eltaher. "A Dynamic Analysis of Randomly Oriented Functionally Graded Carbon Nanotubes/Fiber-Reinforced Composite Laminated Shells with Different Geometries." Mathematics 10, no. 3 (January 27, 2022): 408. http://dx.doi.org/10.3390/math10030408.

Full text
Abstract:
The present study demonstrates the free vibration behavior of composite laminated shells reinforced by both randomly oriented single-walled carbon nanotubes (SWCNTs) and functionally graded fibers. The shell structures with different principal radii of curvature are considered, such as cylindrical, spherical, elliptical–paraboloid shell, hyperbolic–paraboloid shell, and plate. The volume fraction of the fibers has a linear variation along the shell thickness from layer to layer, while the volume fraction of CNTs is constant in all shell layers and uniformly distributed. The fiber-reinforced elements are distributed with three functions which are V-distribution, O-distribution, and X-distribution in addition to the uniform distribution. A numerical analysis was carried out systematically to validate the proposed solution. A new analytical solution is presented based on the Galerkin approach for shells and is exploited to illustrate the influence of some factors on the free vibration behavior of CNTs/fibe-reinforced composite (CNTs/F-RC) laminated shells, including the distributions and volume fractions, various boundary conditions, and geometrical properties of the reinforcement materials. The proposed solution is shown to be an effective theoretical tool to analyze the free vibration response of shells.
APA, Harvard, Vancouver, ISO, and other styles
9

Shiyekar, S. M., and Akshaya Awari. "Static Stress Analysis of Functionally Graded Cylindrical Stiffened Shells." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 1847–52. http://dx.doi.org/10.38208/acp.v1.727.

Full text
Abstract:
In this paper, a study on bending performance of functionally graded (FGM) cylindrical shells under transverse mechanical load is presented. Computational and analytical tools are used to study the behavior of FGM cylindrical shells under bending. Analytical modeling is based on first order shear deformation theory (FOST) and a finite element computational tool ABAQUS is used to model the FGM cylindrical shell. Material properties are estimated by power law index. Results from computational tools for isotropic and FGM cylindrical shells with various boundary and loading conditions are validated with literature and present FOST. Stiffened FG cylindrical shells with cutouts are analyzed. The FGM circular cylindrical shells subjected to an internal pressure with various arrangements of stiffeners are also analyzed and von – Mises stresses are also studied.
APA, Harvard, Vancouver, ISO, and other styles
10

Agapov, Vladimir P., and Alexey S. Markovich. "Investigation of the accuracy and convergence of the results of thin shells analysis using the PRINS program." Structural Mechanics of Engineering Constructions and Buildings 17, no. 6 (December 30, 2021): 617–27. http://dx.doi.org/10.22363/1815-5235-2021-17-6-617-627.

Full text
Abstract:
The theoretical foundations of compatible finite elements construction for static and dynamic analysis of single-layer and multilayer shells are discussed. These finite elements are implemented in the PRINS computer program. The paper presents verification tests to investigate the accuracy and convergence of the results of calculating various shells using these finite elements. Shell structures are widely used in various fields of technology - construction, mechanical engineering, aircraft construction, shipbuilding, etc. Specialists on the design and calculation of such structures need a reliable and accessible tool for the practical problems solving. Computer program PRINS can be one of such tools. It can be effectively used by engineers of design and scientific organizations to solve a wide class of engineering problems related to the calculations of shell structures. The paper describes the finite elements of the shells, implemented in the PRINS program. The results of verification calculations are presented, which confirm the high accuracy of this program.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Shell tool"

1

Pearson, Ryan. "Shell walls: A new hope. Using barnacle shell isotopes as a conservation tool for understanding the movement ecology of threatened sea turtles." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/380998.

Full text
Abstract:
Understanding the geographic distribution of sea turtles within their sub-populations could enhance conservation and management, especially for sub-populations that are the most threatened. Isotope techniques have been used for this purpose and have become popular in the past decade, with an increasing year-to-year trend in published studies. Via systematic literature review of all studies using isotopes to understand sea turtle ecology, this thesis first presents a robust understanding of the current state of the science, identifying knowledge gaps and priorities for future sea turtle conservation research (Chapter 2). This identified that very few stable isotope studies aimed at understanding foraging distributions have been completed on threatened sub-populations of sea turtles, whereas those considered of least concern by the IUCN have been the focus of many. I aimed to address this mismatch between stable isotope studies and conservation needs by developing, validating, and applying a novel isotope technique to understand the foraging distribution of critically endangered South Pacific loggerhead turtles (Caretta caretta), and in doing so identifying critical habitats for priority management. The technique presented uses isotope ratios from commensal barnacle shells, which vary with temperature (SST) and salinity (SSS) rather than turtle diet. Barnacle shells are formed sequentially, storing chemical information about of the surrounding conditions at the time of formation. This makes it possible to assign a date to samples, and compare isotope ratios with the spatial and temporal distribution of sea water parameters (SST and SSS), if the growth of the animal is well understood. Thus, in this thesis I tested the applicability of using barnacles to understand sea turtle foraging distribution by quantifying barnacle growth rates (Chapter 3), regional relationships between barnacle isotopes (C and O) and SST & SSS (Chapter 5), and discriminating between foraging areas based on time dependent isoscapes for barnacle shell (Chapter 4, 5). Finally, the technique is applied to predict the home area of loggerhead turtles that nest in southern Queensland, Australia, identifying hotspots and relationships between nesting and foraging habitats (Chapter 6). This thesis demonstrates that isotopes from barnacle shells can be used to identify the origin and migration distances of host turtles at varying spatial scales, depending on water chemistry gradients present at the time and location of shell formation. In eastern Australia is it possible to assign turtles to home areas with >86% accuracy when areas are separated by at least 400 km (Chapter 4). Globally, many coastal areas are likely to offer similar or better resolution to this, while pelagic waters will typically offer lower resolution. This thesis also shows that estuarine habitats are important foraging habitats for adult loggerhead turtles, probably more so for southern foragers, while marine habitats are clearly important in northern Australia. Future research should focus on developing isoscapes for barnacle shell in other regions, and combining barnacle analyses with other methods to improve the achievable resolution. I also expect that this technique can be applied widely to other taxa and objects that carry commensal barnacles throughout marine journeys.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
APA, Harvard, Vancouver, ISO, and other styles
2

Fingerhut, Raetz Doria Lee. "Bone tool assemblages as an aid to shell mound site typologies on the Northwest coast." PDXScholar, 1989. https://pdxscholar.library.pdx.edu/open_access_etds/3929.

Full text
Abstract:
Fifteen bone tool assemblages from shell midden sites were compared. Three of these are unpublished sites from Prince Rupert Harbor. They were grouped using cluster analysis. Inter and intragroup variation in bone tool assemblage structure was analyzed. One of the objectives of this study was to generate hypotheses about the function of the unpublished sites by comparing their bone tool assemblages with those from sites which are better understood by looking for underlying patterns in the bone tool assemblages. Other objectives were to test the utility of using bone tool assemblages as a diagnostic tool in analyzing sites and to test the utility of the cluster analysis procedure with this data set. Hypotheses were developed identifying possible site usage at the three Prince Rupert Harbor sites, Boardwalk (GbTo-31), Garden Island (GbTo-23), and Grassy Bay (GbTn-1). Bone tool assemblages were shown to be a useful aid in site analysis and cluster analysis was quite useful in identifying existing patterns in these data.
APA, Harvard, Vancouver, ISO, and other styles
3

Collins, Gary Wayne. "Information communication technology as a cognitive tool to facilitate higher-order thinking." Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/24075.

Full text
Abstract:
Digital educational technology is capable of contributing supplementary strategies that can be used to address various educational challenges faced by higher education. Foremost among these challenges is the widespread lack of academic preparedness of students who enter South African higher education institutions. The legacy of Apartheid, teachers' poor domain knowledge and command of the language of instruction, together with a lack of commitment to the cognitive development of learners are some of the reasons why students have not developed the cognitive skills required to engage in meaningful learning. Meaningful learning requires a high level of conceptual engagement and development. To assist in the learning process, educators must focus on student learning rather than on the instructor and the technology used in the instruction. A powerful means of supporting meaningful learning is through a process of model building. Computer technology can effectively be used to facilitate the building of conceptual models. By encouraging students to use computer technology to build models that represent their personal understanding, the students are performing the role of designer and the technology is used as a cognitive tool. Using digital technology as a cognitive tool allows students to engage in critical thinking and higher-order learning. An expert system shell is one way in which technology can be used as a cognitive tool. When students build expert systems they are required to demonstrate the reasoning of an expert and to exhibit an understanding of causal relationships and procedural knowledge. There is very little evidence of research concerning the application of expert systems as a cognitive tool in education. The primary aim of this study is to formulate design principles in the form of conjectures and principles related to a learning environment that uses technology as a cognitive tool in the form of an expert system shell to promote higher-order thinking skills. The second aim of this study is to explore the experiences of students who are exposed to a learning environment based on the conjectures and principles formulated during the design phase of the research. The conjectures and principles formulated during this study are expressed in terms of the characteristics, procedures and arguments associated with a learning environment that uses technology in the form of an expert system shell to facilitate higher-order thinking. These conjectures and principles were separated into seven interrelated clusters that can be summarised as follows:
  • initial exposure;
  • guided discovery learning;
  • designing the expert system on paper;
  • creating domain awareness;
  • linking conceptual understanding to a representation of that understanding;
  • hands-on development; and
  • problem engagement.
These conjectures and principles could guide similar endeavours undertaken by lecturers or instructional designers.
Thesis (PhD)--University of Pretoria, 2012.
Science, Mathematics and Technology Education
unrestricted
APA, Harvard, Vancouver, ISO, and other styles
4

Nealis, Stuart Edmund. "The Effect of Freshwater Mussel Consumption on Dental Wear During the Late Archaic Period." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1300822817.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

O'neal, Lori L. "What’s in Your Toolbox? Examining Tool Choices at Two Middle and Late Woodland-Period Sites on Florida’s Central Gulf Coast." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6340.

Full text
Abstract:
The examination of the tools that prehistoric people crafted for subsistence and related practices offers distinctive insights into how they lived their lives. Most often, researchers study these practices in isolation, by tool type or by material. However, by using a relational perspective, my research explores the tool assemblage as a whole including bone, stone and shell. This allows me to study the changes in tool industries in relation to one another, something that I could not accomplish by studying only one material or tool type. I use this broader approach to tool manufacture and use for the artifact assemblage from Crystal River (8CI1) and Roberts Island (8CI41), two sequential Middle and Late Woodland Period (A.D. 1-1050) archaeological sites on the central Gulf coast of Florida. The results of my research show that people made different choices, both in the type of material they used and the kind of tools they manufactured during the time they lived at these sites as subsistence practices shifted. Evidence of these trends aligns with discrete changes in strata within our excavations. The timing of depositional events and the artifacts found within each suggest people also used the sites differently through time. These trends exemplify the role of crafting tools in the way people maintain connections with their mutable social and physical world.
APA, Harvard, Vancouver, ISO, and other styles
6

Moen, Siri. "Managing political risk : corporate social responsibility as a risk mitigation tool. A focus on the Niger Delta, southern Nigeria." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20189.

Full text
Abstract:
Thesis (MA)--Stellenbosch University, 2012.
ENGLISH ABSTRACT: The petroleum industry concern itself with natural resource extracting activities which are highly sensitive for contributing to environmental degradation by oil spills or gas flaring. A large proportion of the world’s oil and gas reserves is located in developing countries where the presence of multinational oil corporations (MNOCs) is high as host countries often lack the infrastructure needed or are financially unable to conduct extracting operations on their own. The Niger Delta in southern Nigeria has one of the largest oil reserves in Africa and is one of the world’s leading oil exporters. MNOCs like Shell, Chevron, Total, ExxonMobil and Statoil are some of the firms present in the Niger Delta region. The oil-rich area in the developing country poses high levels of political risk for the MNOCs. Local grievances, paired with environmental degradation and human rights violations by the oil companies, have led to a tense relationship between the local stakeholders and the MNOCs, with so-called petro-violence at the center of the oil conflict. Frequently, oil installations are sabotaged and crude oil is stolen, causing major financial losses for the firms, and armed attacks on oil facilities and kidnapping of MNOCs’ staff constitute the majority of political risks facing MNOCs operating in the Niger Delta. This study investigates how MNOCs can successfully manage such political risks, providing a business advantage in a challenging business environment. By addressing the companys’ own behaviour, the research analyses if social engagement through corporate social responsibility (CSR) can mitigate political risk in the Niger Delta. The study looks at two different MNOCs operating in the Niger delta, Shell and Statoil, and scrutinises their methods of implementation of their CSR initiatives. The difference in approaches to CSR is elucidated where Shell claims it has repositioned its approach from a top-down angle during the first years of conducting CSR projects, to a more stakeholder-oriented approach. Yet, their approach is still found to carry elements of the previous top-down approach, and has not resulted in satisfactory performance in relation to stated goals. Statoil undertakes a stakeholder-oriented bottom-up approach, executed with a high level of commitment. The stated CSR goals have to a great extent been met. By assessing the two companies’ CSR strategies in relation to the frequency of political risks experienced by each MNOC, the study finds that CSR has the potential to mitigate political risk depending on the approach to implementation, and could serve as a political risk management strategy.
AFRIKAANSE OPSOMMING: Die brandstofbedryf is betrokke by die ontginning van natuurlike hulpbronne, ’n aktiwiteit wat hoogs sensitief is vir sy bydrae tot omgewingsbesoedeling as gevolg van storting van olie en opvlamming van gas. ’n Baie groot deel van die wêreld se olie en gas reserwes word aangetref in ontwikkelende lande. Die teenwoordigheid van Multinasionale Olie Korporasies (MNOKs) in hierdie lande is groot omdat daar gewoonlik ’n gebrek aan toepaslike infrastruktuur is en die lande ook nie finansieel in staat mag wees om die ontginning op hulle eie te doen nie. Die Niger Delta in die Suide van Nigerië beskik oor een van die grootste olie reserwes in Afrika en is een van die voorste olie uitvoerders in die wêreld. Shell, Chevron, Total, ExxonMobil en Statoil is van die bekende MNOK wat ontginning doen in die Niger Delta gebied. Die olieryke gebiede in ’n ontwikkelende land kan groot politieke risiko vir die MNOKs inhou. Plaaslike griewe gekoppel aan omgewings besoedeling en menseregte skendings deur die oliemaatskappye het gelei tot ’n gespanne verhouding tussen hulle en die plaaslike belange groepe, en sogenaamde “petrogeweld” staan sentraal hierin. Heel gereeld word olie-installasies gesaboteer en ru-olie word gesteel, wat natuurlik groot finansiële verliese die firmas inhou. Daarby word gewapende aanvalle op die olie-installasies uitgevoer en van die MNOKs se personeel ontvoer. Al hierdie dinge vorm die groot politieke risiko’s wat die MNOKs in die Niger Delta in die gesig staar. Hierdie studie ondersoek hoe die MNOKs met welslae hierdie politieke risiko’s kan teenwerk om vir hulle ’n suksesvolle besigheid te vestig in ’n baie mededingende bedryfsomgewing. Deur te kyk na die maatskappy se eie gedrag, sal die navorsing analiseer of gemeenskapsbetrokkenheid deur korporatiewe sosiale verantwoordelikheid (KSV) die politieke risiko in die Niger Delta kan temper. Die studie kyk na twee verskillende MNOK wat in die gebied bedryf word, Shell en Statoil, en kyk noukeurig na die manier waarop hulle KSV inisiatiewe toegepas word. Die verskil in benadering tot die probleem word toegelig deur die feit dat Shell beweer dat hulle ’n bo-na-onder benadering in die beginjare van KSV projekte verander het na ’n beleid waar meer na die betrokkenheid van belangegroepe gekyk word. Tog word gevind dat daar nog oorblyfsels is van die bo-na-onder benadering en dat doelwitte wat gestel is nie bevredigend bereik is nie. Statoil daarenteen. Implementeer ’n onder-na-bo benadering met betrokkenheid van belangegroepe en ’n hoë vlak van toewyding deur die maatskappy. Die gestelde KSV doelwitte is grootliks behaal. Deur te kyk na die twee maatskappye se ervaring van politieke risiko in verhouding met hulle KSV strategieë bevind hierdie studie dat KSV wel die potensiaal het om, as dit suksesvol toegepas word, politieke risiko te temper en dus kan die as ’n strategie om sodanige risiko te bestuur.
APA, Harvard, Vancouver, ISO, and other styles
7

Arantes, Laëtitia. "L'intégration des données énergétiques dans la conception architecturale située." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00965670.

Full text
Abstract:
Ce travail est une réflexion prospective sur la densification verticale de la ville par la tour d'habitation. Trois échelles sont considérées : le bâtiment seul (objet), la composition de sa façade et son insertion urbaine (bâtiment situé). Le parti pris est de n'examiner que le seul critère énergétique. Sont réalisées trois séries d'études " morpho-énergétiques " : 1 - une étude sur l'influence énergétique de la morphologie d'un bâtiment " objet " : l'objectif est de développer un outil d'évaluation simplifiée de la performance énergétique totale des bâtiments résidentiels. 2 - une extension du précédent modèle en insérant le bâtiment dans un morceau de ville : l'objectif est d'identifier l'influence des configurations urbaines sur leur performances énergétiques, à l'aide d'un outil d'optimisation par algorithmes génétiques. 3 - l'étude d'une nouvelle démarche de conception et de rénovation des bâtiments à travers le concept Core-Skin-Shell : l'objectif est d'évaluer l'intérêt énergétique d'une décomposition fonctionnelle du bâtiment.
APA, Harvard, Vancouver, ISO, and other styles
8

Hu, Wenqing. "A model-based simulation tool for impact/blast-resistant structural design /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3144424.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Arpad, Ervin Nagy, and Mhand Sheik Khalil. "Lärarnas och elevernas syn på användningen av moderna smarta verktyg som redskap i teknikorienterade kurser. Examensarbete i fördjupningsämnet Teknik och lärande." Thesis, Malmö högskola, Fakulteten för lärande och samhälle (LS), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-33633.

Full text
Abstract:
Syftet med studien är att undersöka dels elevers och lärares åsikter om hur smarta moderna verktyg som mobiltelefon, läsplatta, bärbar dator och applikationer kan bidra i pedagogiskt arbete, dels hur dessa kan användas som pedagogiska redskap i teknikundervisningen. I arbetet tittar vi på dessa redskap ur systemperspektiv för att kunna se fördelarna och för att kunna upptäcka eventuella hinder som associeras med dess tillämpning i skolan. Systemperspektivet knyter ihop läraren med elev, elevgrupper, smarta enheter, applikationer och lärandemiljön via kommunikation. I teoridelen tar vi upp socioekonomiska aspekterna kopplade till systemperspektivet. Meningen med att kombinera de socioekonomiska faktorerna med systemperspektivet är att få en övergripande bild av hur smarta moderna verktyg påverkar pedagogiskt arbete.I resultatdelen eftersträvar vi att visa hur dessa smarta verktyg kan vara ett effektiv pedagogiskt redskap som kan underlätta lärarens arbete och stimulera elevernas intresse för lärandet. I samband smarta verktyg titta vi på olika applikationer och deras tillämpning i lärandemiljön. Dessa applikationer kan vara sociala medier, allmänna applikationer som ordbehandlare, administrativa verktyg och specifika applikationer inom teknikområdet kopplade till ämnet teknik. Vi kommer även att undersöka hinder och motstånd från användarens sida i samband med användningen av dessa redskap. Studien visar att smarta verktyg troligen har mest positiva effekter i lärandemiljön om användaren uppfyller vissa villkor där bland annat upplevelsen av trygghet i smarta verktyg. De flesta lärare med positiv inställning till dessa verktyg påstår att eleverna lär sig lättare, förbättrar deras självkritiska tänkande, utvecklar språket och utvidgar lärandemiljön till utanför skolans gränser. Elevernas inställning överensstämmer i stort sätt med lärarnas enligt undersökningen. Undersökningen visar att de flesta lärare inte utnyttjar möjligheterna med smarta verktyg i pedagogiskt arbete. Orsaken till detta kan vara att det saknas utbildning i användningen av smarta verktyg viket leder till känslan av otrygghet. Användningen av dessa verktyg i undervisningen till annat syfte som har ingenting att göra med pågående pedagogiskt arbete kan leda till försämrat lärandemiljö. Tidigare forskning och studier visar resultat som slutsatserna vi kom fram till i denna studie.Studien är baserad på kvalitativa intervjudata för att erhålla en djupare förståelse angående elevernas och lärarnas synpunkter om dessa smarta verktyg. Intervjun innefattar lärare och elever från högstadiet och gymnasieskolan.
The purpose of this work is to study both students and teachers views on how modern smart tools can help in educational work, and how these can be used as educational tools in technical subjects. We are looking at these tools from a system perspective to see the benefits and to detect possible obstacles associated with its implementation/use in schools. In the theoretical part we discuss socio-economic aspects linked to the system perspective. The purpose of combining socio-economic factors with the system perspective is to obtain an overall picture of how smart modern tools affect educational work.In the results section we aim to show how these smart units can be an effective educational tool that can facilitate the work of teachers and stimulate students' interest in learning. We will examine also the obstacles and resistance by the users in connection with the use of these tools. Result analysis shows that smart tools probably have the most positive impact on learning environment. Most teachers with a positive attitude to these tools claim that students learn easier, improves their self-critical thinking, develop language and extends the learning environment beyond the school boundaries. Most teachers do not use the potential of smart tools in educational work. The reason may be the lack of training
APA, Harvard, Vancouver, ISO, and other styles
10

Ivars, Camañez Vicente-José. "TDP-Shell: Entorno para acoplar gestores de colas y herramientas de monitorizaci on." Doctoral thesis, Universitat Autònoma de Barcelona, 2012. http://hdl.handle.net/10803/96251.

Full text
Abstract:
Hoy en día la mayoría de aplicaciones distribuidas se ejecutan en clusters de ordenadores gestionados por un gestor de colas. Por otro lado, los usuarios pueden utilizar las herramientas de monitorización actuales para detectar los problemas en sus aplicaciones distribuidas. Pero para estos usuarios, es un problema utilizar estas herramientas de monitorización cuando el cluster está controlado por un gestor de colas. Este problema se debe al hecho de que los gestores de colas y las herramientas de monitorización, no gestionan adecuadamente los recursos que deben compartir al ejecutar y operar con aplicaciones distribuidas. A este problema le denominamos "falta de interoperabilidad" y para resolverlo se ha desarrollado un entorno de trabajo llamado TDP-Shell. Este entorno soporta, sin alterar sus códigos fuentes, diferentes gestores de colas, como Cóndor o SGE y diferentes herramientas de monitorización, como Paradyn, Gdb y Totalview.
Nowadays distributed applications are executed on computer clusters managed by a Batch Queue Systems. Users take advantage of Monitoring Tools to detect run-time problems on their applications running on a distributed environment. But it is a challenge to use Monitoring Tools on a cluster controlled by a Batch Queue System. This is due to the fact that Batch Queue Systems and Monitoring Tools do not coordinate the management of the resources they share, when executing a distributed application. We call this problem "lack of interoperability" and to solve it we have developed a framework called TDP-Shell. This framework supports different Batch Queue Systems such as Condor and SGE, and different Monitoring Tools such as Paradyn, Gdb and Totalview, without any changes on their source code. This thesis describes the development of the TDP-Shell framework, which allows monitoring both sequential and distributed applications that are executed on a cluster controlled by a Batch Queue System, as well as a new type of monitoring called "delayed".
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Shell tool"

1

Elliott, Christopher James. Taphonomy of lower Jurassic shell beds and their use as a tool in basin analysis. Birmingham: University of Birmingham, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Campelo, Hugo. FluSHELL – A Tool for Thermal Modelling and Simulation of Windings for Large Shell-Type Power Transformers. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72703-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Unix Secure Shell Tools. New York: McGraw-Hill, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Madakor, Nnamdi. Analytical fate and mass transport modeling of Harbor Island tank farms: ARCO Oil, GATX (former Shell Oil) and TEXACO Oil : a decision making tool in the cleanup action plan. Bellevue, Wash: Dept. of Ecology, Toxics Cleanup Program, Northwest Regional Office, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Madakor, Nnamdi. Analytical fate and mass transport modeling of Harbor Island tank farms: ARCO Oil, GATX (former Shell Oil) and TEXACO Oil : a decision making tool in the cleanup action plan. Bellevue, Wash: Dept. of Ecology, Toxics Cleanup Program, Northwest Regional Office, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Blinn, Bruce. Portable shell programming: An extensive collection of bourne shell examples. Upper Saddle River, N.J: Prentice Hall PTR, 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

The Middle to Upper Palaeolithic transition in Iberia: Turning data into information. Oxford: Archaeopress, 2006.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Katina, Kati. Sourdough: A tool for the improved flavour, texture and shelf-life of wheat bread. [Espoo, Finland]: VTT Technical Research Centre of Finland, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Rieffer, Alan R. Analyzing communication architectures using Commercial Off-the-Shelf (COTS) modeling and simulation tools. Monterey, Calif: Naval Postgraduate School, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

National Council for Educational Technology., ed. Tools for developing thinking: Using expert system shells in geography to develop higher order I.T. skills. Coventry: NCET, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Shell tool"

1

Heynderickx, D., M. Kruglanski, J. F. Lemaire, and E. J. Daly. "A New Tool for Calculating Drift Shell Averaged Atmospheric Density." In Radiation Belts: Models and Standards, 173–78. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm097p0173.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Rossi, Matti, Mats Gustafsson, Kari Smolander, Lars-Åke Johansson, and Kalle Lyytinen. "Metamodeling editor as a front end tool for a CASE shell." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 546–67. Cham: Springer International Publishing, 1992. http://dx.doi.org/10.1007/bfb0035153.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Leung, Yee. "An Expert System Shell for Building Spatial-Decision-Support-System Development Tool." In Advances in Spatial Science, 357–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60714-1_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Degner, F. L., and R. Santen. "DES: A Knowledge Based Expert System Shell as a Diagnostic Tool in Medicine." In Expert Systems and Decision Support in Medicine, 559. Berlin, Heidelberg: Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-48706-4_90.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

McCaughtry, Thomas, and Sung in Kim. "Improvement of Multi-objective Optimization Tool for Shell-and-Tube Heat Exchanger Design." In Advances in Heat Transfer and Thermal Engineering, 635–40. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4765-6_109.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Banning, Edward B. "Bone and Shell Tools." In The Archaeologist's Laboratory, 231–40. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47992-3_14.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Versley, Yannick, and Anders Björkelund. "Off-the-Shelf Tools." In Anaphora Resolution, 237–66. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-47909-4_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Irving, Damien, Kate Hertweck, Luke Johnston, Joel Ostblom, Charlotte Wickham, and Greg Wilson. "Building Tools with the Unix Shell." In Research Software Engineering with Python, 45–68. Boca Raton: Chapman and Hall/CRC, 2021. http://dx.doi.org/10.1201/9781003143482-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Lackner, Florian. "Synthesis of Metallic Nanoparticles in Helium Droplets." In Topics in Applied Physics, 513–60. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-94896-2_11.

Full text
Abstract:
AbstractHelium droplets provide a unique cold and inert synthesis environment for the formation of nanoparticles. Over the past decade, the method has evolved into a versatile tool, ready to be used for the creation of new nanomaterials. Species with different characteristics can be combined in a core@shell configuration, allowing for the formation of nanoparticles with tailored properties. The realm of structures that can be formed extends from clusters, comprising only a few atoms, to spherical sub-10 nm particles and nanowires with a length on the order of a few hundred nanometers. The formed nanoparticles can be deposited on any desired substrate under soft-landing conditions. This chapter is concerned with the formation of metal and metal oxide nanoparticles with helium droplets. The synthesis process is explained in detail, covering aspects that range from the doping of helium droplets to the behavior of deposited particles on a surface. Different metal particle systems are reviewed and methods for the creation of metal oxide particles are discussed. Selected experiments related to optical properties as well as the structure and stability of synthesized nanoparticles are presented.
APA, Harvard, Vancouver, ISO, and other styles
10

Hartwick, John. "For Whom shall we Toil?" In A Brief History of Price, 20–39. London: Palgrave Macmillan UK, 1993. http://dx.doi.org/10.1057/9780230374669_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Shell tool"

1

Davoli, Ivan. "ReflEXAFS technique: a powerful tool for structural study in new materials." In X-RAY AND INNER-SHELL PROCESSES. AIP, 2003. http://dx.doi.org/10.1063/1.1536400.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Vyzoviti, S. "Shell performativity as a tool for urban action." In The 10th EAAE/ARCC International Conference. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315226255-32.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Redekop, D. "Buckling Analysis of an Orthotropic Elliptical Toroidal Shell." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77524.

Full text
Abstract:
A theoretical solution is given for the linearized buckling problem of an orthotropic toroidal shell with an elliptical cross-section under external pressure loading. The solution is based on the Sanders-Budiansky shell theory, and makes use of the harmonic differential quadrature method. Theory developed earlier for the buckling of orthotropic shells of revolution, and the vibration of orthotropic elliptical toroidal shells, is incorporated in the present work. Numerical results obtained from the solution are compared with results given in the literature, and good correspondence is generally observed. A parametric study is then conducted, covering a wide range of material and geometric parameters. Regression formulas are derived, indicating the variation of the buckling pressure with the degree of orthotropy of the material. Overall, the study introduces a new tool for the buckling analysis of elliptical toroidal shells, and extends the information available for orthotropic toroidal shells.
APA, Harvard, Vancouver, ISO, and other styles
4

Kormeier, Thomas, and Stephan Rudolph. "Topological Synthesis of Shell Structures." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99092.

Full text
Abstract:
Currently available tools for classical topology optimization of structures have proven valuable in conceptual design. These tools may provide design direction very early in the design cycle. However, the results subsequently need to be interpreted and translated by an engineer into a consistent CAD-model. This research focuses on the topological design synthesis of shell structures, which is being carried out using a design language approach. The aim of this approach is to automatically generate, modify and optimize an abstract representation of the design. This representation is automatically translatable into a CAD-model and will thus lead to an optimization process that offers a valid structural CAD-model as result. Design languages serve in this context as a computable abstraction of design representation and synthesis by use of rule-based information processing mechanisms. These rules (also called design patterns), are applied to generate and modify the topology of the design representation. Design patterns contain the engineers know-how and best-practice. The computerized execution of design patterns in a design compiler yields a powerful topology modification tool. As prototype application, the synthesis of shell structures is presented in this work. The automation mechanisms and the information flow through design synthesis, model generation, design analysis and evaluation are outlined. A discussion on the future application of design patterns for knowledge-based structural optimization is derived from the shown examples.
APA, Harvard, Vancouver, ISO, and other styles
5

Srinivasan, Raman V., Rajiv Agrawal, and Gary L. Kinzel. "Design Shell: A Framework for Interactive Parametric Design." In ASME 1990 Design Technical Conferences. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/detc1990-0035.

Full text
Abstract:
Abstract This paper consists of a study of the mechanical engineering design methodology and the development of a computer-based framework for performing design. The framework, known as the Design Shell, provides the essential design tools, such as, constraint manager, nonlinear simultaneous equation solvers, optimizers, sensitivity analyzer, and graphics handler, in an interactive design environment. The design shell attempts to enhance the designer’s understanding of the relationships between the various design parameters and how these affect the overall design. As an illustration of the capabilities of the computer tool, the design of a torsion bar spring is presented in the paper.
APA, Harvard, Vancouver, ISO, and other styles
6

Collins, David, Joshua Braun, and Jason Gates. "Logger: A Tool for Keeping Track of Python's Interactions with the Shell." In Proposed for presentation at the US-RSE Virtual Conference 21 held May 24-27, 2021. US DOE, 2021. http://dx.doi.org/10.2172/1869546.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Soderznik, Marko, Kristina Zagar, and Spomenka Kobe. "Core-shell microstructure of RE-Fe-B grains to achieve maximum coercivity: Industrial application." In IEEE EUROCON 2015 - International Conference on Computer as a Tool (EUROCON). IEEE, 2015. http://dx.doi.org/10.1109/eurocon.2015.7313719.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hsu, Ching-Yu, and Chan-Yung Jen. "The Transient Response of Imperfect Thin-Walled Stiffened Cylindrical Shell Exposed to Side-On Underwater Explosion." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79018.

Full text
Abstract:
The thin-walled stiffened cylindrical shells are usually applied in a submarine which takes the external pressure load, or in a boiler, pressure vessel or pipeline system which takes the internal pressure load. The thin-walled stiffened cylindrical shells under hydrodynamic loading are very sensitive to geometrical imperfections. This study is investigating an imperfect thin-walled stiffened cylindrical shell (out-of-round ratio is ψ = 2%) at a depth of 50m below the water level to see how it withstands sideward TNT 782 kg underwater explosion loading so as to understand its structural transient response. ABAQUS finite element software is used as an analysis tool in the current study, meanwhile, during the analysis process, the Fluid-Structure Interaction (FSI) condition is employed. The structural transient response results of stress and displacement time history of the imperfect thin-walled stiffened cylindrical shell can be used as a reference for the anti-underwater explosion analysis and design of future submersible vehicles, pressure hulls or related structural designs.
APA, Harvard, Vancouver, ISO, and other styles
9

del Prado, Zenon J., Paulo B. Gonc¸alves, and Michael P. Pai¨doussis. "Influence of Geometry on the Non-Linear Vibrations of Cylindrical Shells With Internal Flowing Fluid." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30034.

Full text
Abstract:
In this work, the influence of the characteristic geometric parameters of a cylindrical shell, such as radius-to-thickness and radius-to-length ratios, on both the linear and non-linear vibrations of a fluid-filled cylindrical shell with internal flowing fluid is studied. The Donnell non-linear shallow shell equations are used to study a simply supported cylindrical shell subjected to both lateral and axial time-dependent loads with internal flowing fluid. The fluid is assumed to be inviscid and incompressible and the flow isentropic and irrotational. An expansion with eight degrees of freedom, containing the fundamental, companion, gyroscopic and five axisymmetric modes is used to describe the lateral displacement of the shell. The Galerkin method is used to obtain the nonlinear equations of motion which are, in turn, solved by the Runge-Kutta method. First, the parametric linear equations are used to study the influence of geometry and physical properties on the natural frequencies, critical flow and critical circumferential wavenumber. Secondly, numerical methods are used to describe the influence of geometric characteristics on the non-linear frequency-amplitude relations of the shell. The results obtained show the influence of the geometric parameters on the vibration characteristics of the shell and can be used as a basic tool for design of cylindrical shells in a dynamic environment.
APA, Harvard, Vancouver, ISO, and other styles
10

Chakrabarti, Suryarghya, Letian Wang, and K. M. K. Genghis Khan. "Quick Aeromechanical Assessment of Turbine Blades Based on Shell Element Based Models." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26328.

Full text
Abstract:
A fast finite element model based tool has been developed to calculate the natural frequencies of fundamental modes of cooled gas turbine bladed disk assemblies during conceptual design. The tool uses shell elements to model the airfoil, shank, and disk, and achieves order of magnitude reduction in computation time allowing exploration of a wide design space at the preliminary design stages. The analysis includes prestress effects due to centrifugal loading and approximate temperature loading on the parts. Sensitivity studies are performed to understand the relative impact of design features such as airfoil internal geometry, bond coat, and thermal barrier coating on the system natural frequencies. Critical features are selected which need to be modeled to get an accurate natural frequency estimate. The results obtained are shown to be within 5% of the frequencies obtained from a full-fidelity finite element model. A case study performed on seven blade designs illustrates the use of this tool for quick aeromechanical assessment of a large number of designs.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Shell tool"

1

Gaspard, Danièle, Benita Putlitz, and Lukas Baumgartner. X-ray Computed Tomography – A Promising Tool For Brachiopod Shell Investigations. Cogeo@oeaw-giscience, September 2011. http://dx.doi.org/10.5242/iamg.2011.0292.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bushby, Steven T., Natascha Castro, Michael A. Galler, and Cheol Park. Using the virtual cybernetic building testbed and FDD test shell for FDD tool development. Gaithersburg, MD: National Institute of Standards and Technology, 2001. http://dx.doi.org/10.6028/nist.ir.6818.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Fingerhut Raetz, Doria. Bone tool assemblages as an aid to shell mound site typologies on the Northwest coast. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5813.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Berger, Bonnie. Development of simulation tools for virus shell assembly. Final report. Office of Scientific and Technical Information (OSTI), January 2001. http://dx.doi.org/10.2172/771271.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Blodgett, D. S., and D. J. Phair. Integrating Commercial Off-the-Shelf Tools for Custom Software Development. Fort Belvoir, VA: Defense Technical Information Center, June 1992. http://dx.doi.org/10.21236/ada252462.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Corriveau, Elizabeth, Ashley Mossell, Holly VerMeulen, Samuel Beal, and Jay Clausen. The effectiveness of laser-induced breakdown spectroscopy (LIBS) as a quantitative tool for environmental characterization. Engineer Research and Development Center (U.S.), April 2021. http://dx.doi.org/10.21079/11681/40263.

Full text
Abstract:
Laser-induced breakdown spectroscopy (LIBS) is a rapid, low-cost analytical method with potential applications for quantitative analysis of soils for heavy metal contaminants found in military ranges. The Department of Defense (DoD), Army, and Department of Homeland Security (DHS) have mission requirements to acquire the ability to detect and identify chemicals of concern in the field. The quantitative potential of a commercial off-the-shelf (COTS) hand-held LIBS device and a classic laboratory bench-top LIBS system was examined by measuring heavy metals (antimony, tungsten, iron, lead, and zinc) in soils from six military ranges. To ensure the accuracy of the quantified results, we also examined the soil samples using other hand-held and bench-top analytical methods, to include Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and X-Ray Fluorescence (XRF). The effects of soil heterogeneity on quantitative analysis were reviewed with hand-held and bench-top systems and compared multivariate and univariate calibration algorithms for heavy metal quantification. In addition, the influence of cold temperatures on signal intensity and resulting concentration were examined to further assess the viability of this technology in cold environments. Overall, the results indicate that additional work should be performed to enhance the ability of LIBS as a reliable quantitative analytical tool.
APA, Harvard, Vancouver, ISO, and other styles
7

Vora, Mehul Arun, Steinar Sanni, and Roger Flage. Environmental Risk Assessment (ERA) of IOR solutions on the Norwegian Continental Shelf. University of Stavanger, November 2021. http://dx.doi.org/10.31265/usps.209.

Full text
Abstract:
The aim of the Environmental Risk Assessment (ERA) work at the IOR Centre is to provide methods, procedures, and key data to enable assessment of environmental risk in relation to IOR solutions (products and processes) elaborated at the center. The objective of this report is to provide a user guidance summary on methods and tools to conduct ERA related to different IOR solutions. It will explain workflows, expertise, and tools needed in relation to different types of IOR solutions applied. The report is foremost addressed to environmental engineers in the oil and gas industry, but will also be relevant for environmental managers, environmental authorities and regulators as well as for suppliers of chemical products and environmental services.
APA, Harvard, Vancouver, ISO, and other styles
8

Friedman, Haya, Julia Vrebalov, James Giovannoni, and Edna Pesis. Unravelling the Mode of Action of Ripening-Specific MADS-box Genes for Development of Tools to Improve Banana Fruit Shelf-life and Quality. United States Department of Agriculture, January 2010. http://dx.doi.org/10.32747/2010.7592116.bard.

Full text
Abstract:
Fruit deterioration is a consequence of a genetically-determined fruit ripening and senescence programs, in which developmental factors lead to a climacteric rise of ethylene production in ethylene-sensitive fruits such as tomato and banana. Breeding of tomato with extended fruit shelf life involves the incorporation of a mutation in RIN, a MADS-box transcription factor participating in developmental control signalling of ripening. The RIN mode of action is not fully understood, and it may be predicted to interact with other MADS-box genes to execute its effects. The overall goal of this study was to demonstrate conservation of ripening control functions between banana and tomato and thus, the potential to genetically extend shelf-life in banana based on tools developed in tomato. The specific objectives were: 1. To increase the collection of potential RIN-like genes from banana; 2. To verify their action as developmental regulators; 3. To elucidate MADS-box gene mode of action in ripening control; 4. To create transgenic banana plants that express low levels of endogenous Le-RIN- like, MaMADS- gene(s). We have conducted experiments in banana as well as in tomato. In tomato we have carried out the transformation of the tomato rin mutant with the MaMADS1 and MaMADS2 banana genes. We have also developed a number of domain swap constructs to functionally examine the ripening-specific aspects of the RIN gene. Our results show the RIN-C terminal region is essential for the gene to function in the ripening signalling pathway. We have further explored the tomato genome databases and recovered an additional MADS-box gene necessary for fruit ripening. This gene has been previously termed TAGL1 but has not been functionally characterized in transgenic plants. TAGL1 is induced during ripening and we have shown via RNAi repression that it is necessary for both fleshy fruit expansion and subsequent ripening. In banana we have cloned the full length of six MaMADS box genes from banana and determined their spatial and temporal expression patterns. We have created antibodies to MaMADS2 and initiated ChI assay. We have created four types of transgenic banana plants designed to reduce the levels of two of the MaMADS box genes. Our results show that the MaMADS-box genes expression in banana is dynamically changing after harvest and most of them are induced at the onset of the climacteric peak. Most likely, different MaMADS box genes are active in the pulp and peel and they are differently affected by ethylene. Only the MaMADS2 box gene expression is not affected by ethylene indicating that this gene might act upstream to the ethylene response pathway. The complementation analysis in tomato revealed that neither MaMADS1 nor MaMADS2 complement the rin mutation suggesting that they have functionally diverged sufficiently to not be able to interact in the context of the tomato ripening regulatory machinery. The developmental signalling pathways controlling ripening in banana and tomato are not identical and/or have diverged through evolution. Nevertheless, at least the genes MaMADS1 and MaMADS2 constitute part of the developmental control of ripening in banana, since transgenic banana plants with reduced levels of these genes are delayed in ripening. The detailed effect on peel and pulp, of these transgenic plants is underway. So far, these transgenic bananas can respond to exogenous ethylene, and they seem to ripen normally. The response to ethylene suggest that in banana the developmental pathway of ripening is different than that in tomato, because rin tomatoes do not ripen in response to exogenous ethylene, although they harbor the ethylene response capability This study has a major contribution both in scientific and agricultural aspects. Scientifically, it establishes the role of MaMADS box genes in a different crop-the banana. The developmental ripening pathway in banana is similar, but yet different from that of the model plant tomato and one of the major differences is related to ethylene effect on this pathway in banana. In addition, we have shown that different components of the MaMADS-box genes are employed in peel and pulp. The transgenic banana plants created can help to further study the ripening control in banana. An important and practical outcome of this project is that we have created several banana transgenic plants with fruit of extended shelf life. These bananas clearly demonstrate the potential of MaMADS gene control for extending shelf-life, enhancing fruit quality, increasing yield in export systems and for improving food security in areas where Musaspecies are staple food crops.
APA, Harvard, Vancouver, ISO, and other styles
9

Dafoe, L. T., K. Dickie, G. L. Williams, and T. McCartney. Stratigraphy of the Labrador margin: a synthesis and new perspectives. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/321829.

Full text
Abstract:
The Labrador Sea formed during rifting between North America and Greenland beginning in the Early Cretaceous, with subsequent seafloor spreading from the Maastrichtian (chron C31) to Early Paleocene (chron C27n) that ended by chron C13 (earliest Oligocene). Early Cretaceous rifting resulted in accumulation of Alexis Formation basalt units and Bjarni Formation nonmarine and marginal marine clastic rocks. In the Late Cretaceous, extension focused further offshore as sag basin conditions formed across the shelf, with a basinwide transgression of Markland Formation shale and localized Freydis Member sandstone development. A Middle Paleocene to Early Eocene regression formed Gudrid Formation shoreline sandstone units, with correlative Cartwright Formation marine shale units. This was followed by an Early Eocene transgression of the Kenamu Formation and Middle Eocene Leif Member shoreline development. During the Late Eocene through Pleistocene, transgression took place once again at the base of the Mokami Formation, with subsequent development of the partly correlative shallow-marine sandstone units of the Saglek Formation.
APA, Harvard, Vancouver, ISO, and other styles
10

Ruby, Jeffrey, Richard Massaro, John Anderson, and Robert Fischer. Three-dimensional geospatial product generation from tactical sources, co-registration assessment, and considerations. Engineer Research and Development Center (U.S.), February 2023. http://dx.doi.org/10.21079/11681/46442.

Full text
Abstract:
According to Army Multi-Domain Operations (MDO) doctrine, generating timely, accurate, and exploitable geospatial products from tactical platforms is a critical capability to meet threats. The US Army Corps of Engineers, Engineer Research and Development Center, Geospatial Research Laboratory (ERDC-GRL) is carrying out 6.2 research to facilitate the creation of three-dimensional (3D) products from tactical sensors to include full-motion video, framing cameras, and sensors integrated on small Unmanned Aerial Systems (sUAS). This report describes an ERDC-GRL processing pipeline comprising custom code, open-source software, and commercial off-the-shelf (COTS) tools to geospatially rectify tactical imagery to authoritative foundation sources. Four datasets from different sensors and locations were processed against National Geospatial-Intelligence Agency–supplied foundation data. Results showed that the co-registration of tactical drone data to reference foundation varied from 0.34 m to 0.75 m, exceeding the accuracy objective of 1 m described in briefings presented to Army Futures Command (AFC) and the Assistant Security of the Army for Acquisition, Logistics and Technology (ASA(ALT)). A discussion summarizes the results, describes steps to address processing gaps, and considers future efforts to optimize the pipeline for generation of geospatial data for specific end-user devices and tactical applications.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Shell tool' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography