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Tesi sul tema "Scanning systems"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 1 agosto 2024

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1

Hyde, Neville, e Johan Burger. "Environmental scanning : the need for and overview of environmental scanning systems". Thesis, Stellenbosch : University of Stellenbosch, 2000. http://hdl.handle.net/10019.1/4656.

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ENGLISH ABSTRACT: Historically organisations have had the "luxury" of being able to anticipate future developments and respond to them in good time due to, firstly, the comparatively slow pace of change and, secondly, the past being a relatively good predictor of the future. The second half of the 20th Century bears witness to some of the most dramatic changes and developments experienced by mankind. Most notable of these were globalisation,de-regulation, the emergence of the information/knowledge economy and, perhaps most significant of all, the changes brought about by the Internet. The underlying assertion of this report is that, given the current, complex, dynamic and sometimes volatile nature of changes in the external environment, in order to ensure a sustainable competitive advantage, organisations will be forced to consider carefully the dynamics of the environment in which they operate and to build their plans around these dynamics. This report briefly traces the evolution of strategic planning to its current status prior to providing a detailed analysis of the nature of environmental scanning and its applicability to strategic planning. The report provides a theoretical overview Qf environmental scanning and a discussion of some of the tools and techniques of environmental scanning. Within this context the report provides a brief indication of the extent of the practice of environmental scanning within the financial services sector of South Africa. The conclusion assesses the findings of the current state of the practice of environmental scanning against the theory, with the view to providing an insight into the extent to which environmental scanning is applied in South Africa Possible future directions of research and development of the practice are also identified.
AFRIKAANSE OPSOMMING: Histories gesproke, het instansies oor die "luukse" beskik om toekomstige ontwikkelinge vooruit te kon waarneem en betyds op hulle te reageer, eerstens weens die betreklike stadige pas van verandering en tweedens, omdat die verlede 'n betreklike goeie voorspeller van die toekoms was. Die tweede helfte van die 20ste eeu getuig van sommige van die mees dramatiese veranderinge en ontwikkelinge wat deur die mens ondervind is. Die mees uitstaande was globalisering, deregulering, die verskyning van die inligting/kennis-ekonomie en, dalk die mees uitstaande van almal, die veranderinge wat deur die Internet teweeggebring is. Die onderliggende stelling van hierdie verslag is dat, gegewe die huidige, komplekse,dinamiese en soms onbestendige aard van veranderinge in die eksterne omgewing, om 'n mededingende voordeel te verseker, sal instansies geforseer word om die dinamika van die omgewing waarin hulle werk, versigtig te oorweeg en om hulle planne om hierdie dinamika te bou. Hierdie verslag speur kortliks die ewolusie na van strategiese beplanning tot sy huidige status gevolg deur 'n omvattende analise van die aard van omgewingsondersoeke en die toepaslikheid daarvan op strategiese beplanning. Die verslag voorsien 'n teoretiese oorsig tot omgewingsondersoeke en 'n bespreking van sommige van die instrurnente en tegnieke van omgewingsondersoeke. Binne hierdie konteks voorsien die verslag 'n kort aanduiding van die omvang van die uitvoering van omgewingsondersoeke binne die finansiele dienstesektor van Suid-Afrika. Die slot som die bevindings op van die huidige toestand van die praktyk van omgewingsondersoeke volgens die teorie, met die oog op voorsiening van 'n insig in die mate waartoe omgewingsondersoeke in Suid-Afrika toegepas word. Moontlike toekomstige rigtings van navorsing en ontwikkeling van die praktyk word ook geidentifiseer.
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2

Salazar, Enríquez Christian David. "Scanning tunneling microscopy on low dimensional systems". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-211572.

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Abstract (sommario):
This thesis contains experimental studies on low dimensional systems by means of scanning tunneling microscopy (STM). These studies include investigations on dinickel molecular complexes and experiments on iron nanostructures used for the implementation of the spin-polarized scanning tunneling microscopy technique at the IFW-Dresden. Additionally, this work provides detailed information of the experimental technique (STM), from the theoretical background to the STM-construction, which was part of this doctoral work. Molecular anchoring and electronic properties of macrocyclic magnetic complexes on gold surfaces have been investigated by mainly scanning tunneling microscopy and complemented by X-rays photoelectron spectroscopy. Exchange–coupled macrocyclic complexes [Ni2L(Hmba)]+ were deposited via 4-mercaptobenzoate ligands on the surface of Au(111) single crystals. The results showed the success of gold surface-grafted magnetic macrocyclic complexes forming large monolayers. Based on the experimental data, a growth model containing two ionic granular structures was proposed. Spectroscopy measurements suggest a higher gap on the cationic structures than on the anionic ones. Furthermore, the film stability was probed by the STM tip with long-term measurements. This investigation contributes to a new promising direction in the anchoring of molecular magnets to metallic surfaces. Iron nanostructures of two atomic layers and iron-coated tungsten tips were used in order to implement the spin-polarized scanning tunneling microscopy technique at the IFW-Dresden. First of all, a systematic study of the iron growth, from sub-monolayers to multilayers on a W(110) crystal is presented. Subsequent to the well-understanding of the iron growth, the experiments were focused on revealing, for the first time at the IFW-Dresden, the magnetic inner structure of iron nanostructures. The results evidently showed the presence of magnetic domains of irregular shapes. Furthermore, SP-STM probed the bias voltage dependence of the magnetic contrast on the iron nanostructures. This technique opens up a new powerful research line at the IFW-Dresden which is promising for the study of quantum materials as molecular magnets and strongly correlated systems.
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3

Drake, Devin Robert. "Applications of laser scanning and imaging systems". [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000526.

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4

Emberson, Matthew David. "Novel scanning techniques for CCD image capture and display". Thesis, University of St Andrews, 1995. http://hdl.handle.net/10023/15039.

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This work details two investigations into image capture, taken from the fields of x-ray and laser research, and also details two scanning systems: a wire surface generator and a video security device. Firstly a camera system is described that can display images, digitize them and provide real time false shading. This camera is shown to have a linear intensity response and to have a maximum saturation level below the digitizing range. Some example outputs are then illustrated. The ability to irradiate CCDs with direct X-ray radiation is also investigated. A camera is developed that vertically integrates such images and is shown to give an increase in the processing speed of existing equipment and to reduce experiment times by a factor of 388. Taking this idea further, a fast one dimensional camera is developed. This camera couples laser pulses onto a CCDs via a fibre optic faceplate and a 25 mum slit. Unusual scanning techniques are used to achieve image storage within the sensor itself and a method for correcting dark current and other errors is proposed. Next a mechanism for displaying wire surface representations of intensity) images is investigated. Results obtained from real time, hidden line removing hardware are illustrated, along with improved algorithms for shaded surface generation. This is then developed into a security device protecting VDUs from radio based surveillance. This is achieved by randomizing the display order of raster lines along with a hardware solution for random sequence generation. Finally the generation of Uniformly distributed random numbers is achieved by processing readings from a digitized. Normally distributed voltage source. The effects of this processing are investigated and an analysis of the underlying theory is used to determine an optimal setting for the gain stage.
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5

Chen, Rongrong. "Applications of scanning probe microscopies in electrocatalytic systems". Case Western Reserve University School of Graduate Studies / OhioLINK, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057072469.

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6

Smithwick, Quinn Y. "Modeling and control of the single fiber scanning endoscope /". Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/9987.

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7

Yee, Tze-Sung. "A hardware based optical digital code scanning system". Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182536210.

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8

Bennett, Allison C. (Allison Christine), e Yi Zhuan Chin. "100% container scanning : security policy implications for global supply chains". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45248.

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Abstract (sommario):
Thesis (M. Eng. in Logistics)--Massachusetts Institute of Technology, Engineering Systems Division, 2008.
Includes bibliographical references (leaves 164-169).
On August 3, 2007, President George Bush signed into law HR1 the "Implementing Recommendations of the 9/11 Commission Act of 2007." The 9/11 Act requires 100% scanning of US-bound containers at foreign seaports by 2012 through the use of non-intrusive (NII) and radiation detection equipment. Maritime stakeholders and the government community have actively debated the feasibility of this plan, citing economic impacts, barriers to global trade and insufficient technology and physical space. This thesis focuses on importer concerns relating to potential shipment delays, financial burdens, sourcing issues and contingency planning concerns in global supply chain operations. Using port statistics, field study data as well as industry insights, frameworks are developed to identify major stakeholder issues and quantify the financial costs and delay risks bourn across the entire supply chain. Cost and delay analyses are based on 2 prototypical ports - a small/low-volume export port and a large/high-volume export port. Cost analysis is performed for a consolidated (port authority) level installation and a segmented (terminal operator) level installation to calculate a per-box scanning fee. Queuing models and Monte-Carlo simulations are also developed to quantify truck congestion due to primary scanning and the risk of containers missing vessels due to secondary inspections. Results of the cost analysis indicate that scanning configurations, particularly related to NII, greatly affect the-per box scanning cost. It is not economically feasible to scan only US-bound containers at half of the 600 ports with direct connections to the US. Analysis of truck congestion suggests that the ramp metering effect of the entry gate can help to abate congestion at the scanning area.
(cont.) Analysis on secondary inspection delays revealed that under a set of assumptions that reflect current operations, the risk of containers missing sailings could potentially increase to 1.5%, which may in turn require a 0.5% to 5% increase in safety stock. Our study shows that cost and delay implications of 100% export US-bound container scanning may be less severe than industry anticipated. Supply chain disruptions due to scanning is best mitigated through earlier container dispatch, increased safety stock or increased scanning infrastructure and personnel at ports.
by Allison C. Bennett and Yi Zhuan Chin.
M.Eng.in Logistics
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9

Chan, Vincent Harry. "Feature based reverse engineering employing automated multi-sensor scanning". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0010/NQ41368.pdf.

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10

Demming, Anna Linda. "Theoretical investigations into apertureless scanning near field optical microscopy systems". Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429644.

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11

Sparks, Andrew William 1977. "Scanning probe microscopy with inherent disturbance suppression using micromechanical systems". Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30249.

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Abstract (sommario):
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005.
Includes bibliographical references (p. 109-116).
All scanning probe microscopes (SPMs) are affected by disturbances, or mechanical noise, in their environments which can limit their imaging resolution. This thesis introduces a general approach for suppressing out-of-plane disturbances that is applicable to non-contact and intermittent contact SPM imaging modes. In this approach, two distinct sensors simultaneously measure the probe-sample separation: one sensor measures a spatial average over a large sample area while the other responds locally to topography underneath the nanometer-scale probe. When the localized sensor is used to control the probe-sample separation in feedback, the spatially distributed sensor signal reveals only topography. This technique was implemented on a scanning tunneling microscope (STM) and required a custom micromachined scanning probe with an integrated interferometer for the spatially averaged measurement. The interferometer design is unique to SPM because it measures the probe-sample separation instead of the probe deflection. A robust microfabrication process with a novel breakout scheme was developed and resulted in 100 % device yield. For imaging, an STM setup with optical readout was built and characterized. The suppression improvement over conventional SPM imaging was measured to be 50 dB at 1 Hz, in agreement with predictions from classical feedback theory. Images are presented as acquired with each sensor signal in several environments, and the interferometer images show remarkable clarity when compared with the conventional tunneling images.
(cont.) The out-of-plane noise floor with this technique on the home-built microscope was 0.1 i rms. The results of this work suggest that the resolution of STM and other SPM modes, notably tapping mode atomic force microscopy (AFM), can be substantially improved, allowing low noise imaging of nanoscale topography in noisy environments and potentially enabling repeatable atomic scale imaging in ambient conditions.
by Andrew William Sparks.
Ph.D.
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12

Wong, Denis Kow Son. "Automation of region specific scanning for real time medical systems". Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/12027.

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Includes abstract.
Includes bibliographical references.
X-rays have played a vital role in both the medical and security sectors. However, there is a limit to the amount of radiation a body can receive before it becomes a health risk. Modern low dose x-ray devices operate using a c-arm which moves across the entire human body. This research reduces the radiation applied to the human body by isolating the region that needs exposure. The medical scanner that this work is based on is still under development and therefore a prototype of the scanner is developed for running simulations. A camera is attached onto the prototype and used to point out the regions that are required to be scanned. This is both faster and more accurate than the traditional method of manually specifying the areas.
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13

Gallagher, Christopher T. "Contact force control for continuous scanning coordinate measuring machines". Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/17319.

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14

Zhang, Peihong. "Amplitude correction for reduced axis scanning of layered materials". Access citation, abstract and download form; downloadable file 5.49 Mb, 2004. http://wwwlib.umi.com/dissertations/fullcit/3131705.

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15

Ingle, Jeffery Thomas 1962. "Applications of scanning force microscopy to magnetic and electronic media". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277145.

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A scanning force microscope is an instrument which can image the forces present on a sample with high resolution. These forces include magnetic, electric, and atomic forces. The scanning force microscope uses either a tunneling, capacitive or optical method of sensing the motion of a lever-tip mechanical system that reacts to the forces present on a sample. There are four optical methods used in scanning force microscopy: heterodyne, homodyne, deflection and laser feedback. In this thesis, two implementations of the laser feedback method of detecting lever motion are described: a fiber coupled laser diode feedback and a tightly coupled laser diode feedback. The theory of interactions between a tip and the magnetic or electric fields at the surface of a sample are presented, along with the theory of the laser diode feedback. The limiting noises inherent in the system are discussed and representative values are given. Results of the sensitivity of the two systems are presented, and images of electric forces acting on the tip from interdigitated electrodes are demonstrated.
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16

Yao, Helai. "An approach to generate geometric models from multiple range images". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21956.pdf.

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17

Cain, James H. "Image motion compensation for an electronic imaging system /". Online version of thesis, 1986. http://hdl.handle.net/1850/8731.

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18

Taylor, Christopher Trevor. "Enhancement of imagery from passive millimetre-wave systems for security scanning". Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/enhancement-of-imagery-from-passive-millimetrewave-systems-for-security-scanning(7011ec7c-86ee-4770-b637-7ffe4909b241).html.

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This thesis concerns methods to enhance current and explore future radiometric imaging systems for security screening. Its main focus is on the test and calibration procedures for the BorderWatch system – an established 33 GHz passive millimetre-wave imager developed by QinetiQ PLC as an outdoor security scanning portal for soft-sided heavy goods vehicles at ports of entry. The effects of the limited size of the sky background reflector of the operational system are addressed and modifications to mitigate these effects are proposed. Systematic diurnal and seasonal variations in the receiver output powers are characterised and strongly linked with variations in the physical temperature of the RF components. The proposed BorderWatch temperature calibration subsystem requires a reliable cold sky temperature reference point; the aim being to reduce the level of fixed pattern noise in present-day imagery and allow for post-processing methods requiring absolute temperature values. Cost considerations rule out independent millimetre-wave radiometers at each site so a proposed alternative is to use infra-red measurements as a proxy. A literature investigation is made into the millimetre-wave and infrared atmospheric opacities for a variety of meteorological conditions. The design, calibration and operation of a 35 GHz switching radiometer is described together with a comparison of the millimetre-wave radiometric brightness temperature measurements against the data from a low cost commercial infra-red sensor and from a nearby meteorological station. The results show an excellent correlation between the zenith sky temperatures in the infrared and millimetre-wave bands but only in clear sky conditions – as anticipated the presence of clouds affects the infra-red brightness distribution much more strongly than that of the millimetre-wave. Future security imagers may well incorporate interferometric arrays. An extensive simulation programme has been carried out to explore appropriate numbers of antennas and whether radio astronomy configurations and post-processing techniques can offer cost-effective routes to high image fidelity. The results of a quantitative analysis are promising and array configurations and techniques appropriate for potential future security imagers are suggested.
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19

Wong, Timothy M. H. "Digital implementation of a feedback controller for scanning probe microscopy". Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240094.

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20

Nadella, Suman. "Multi camera stereo and tracking patient motion for SPECT scanning systems". Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-082905-161037/.

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Abstract (sommario):
Thesis (M.S.)--Worcester Polytechnic Institute.
Keywords: Feature matching in multiple cameras; Multi camera stereo computation; Patient Motion Tracking; SPECT Imaging Includes bibliographical references. (p.84-88)
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21

Ortega, Delgado Moisés Alberto. "Reducing Inherent Deviations in Galvanometer Scanning Systems for Large Area Processing". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-217250.

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Galvanometer laser machining is a well-established laser machining technique in which the laser beam is positioned on a working field by means of mirrors mounted in galvanometers. Nonetheless, new applications make necessary the development of innovative techniques for increasing the performance of such systems. Aside all the advantages of this technique like given resolution, repeatability and velocity, a limited working area is an important drawback. In this thesis work, the limitations of different state-of-the-art schemes for increasing the working field of galvanometer laser machining systems are examined. The necessity of a new strategy for reducing present deviations introducing a vision system is established. The construction of an error vector and calculation of coordinate’s transformations to improve precision are presented. In this work, the “Arithmetic mean transformation”, “individual correction transformation”, “iterative inverse distance weighting transformation” and a stitching approach denominated “Auto-stitching” are presented and demonstrated as methods for reducing inherent deviations in galvanometer scanning systems for large area processing.
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Papakosta, Paraskevi. "Design and development of mechanical passive millimetre wave imaging scanning systems". Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325129.

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23

Kett, Victoria Louise. "An investigation into amorphous sucrose systems using modulated temperature scanning calorimetry". Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324639.

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24

Jackson, Michael David. "Scanning tunnelling microscope and electron spectroscopy studies of selected GaAs systems". Thesis, University of Liverpool, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338676.

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25

Wang, W. L. "Enhancement of fidelity of surface measurement systems". Thesis, University of Warwick, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308509.

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26

Lee, Chih-Jie. "Design and Assessment of Cardiac SPECT Systems". Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/232476.

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Single-photon emission computed tomography (SPECT) is a modality widely used to detect myocardial ischemia and myocardial infarction. Objectively assessing and comparing different SPECT systems is important so that the best detectability of cardiac defects can be achieved. Whitaker, Clarkson, and Barrett's study on the scanning linear observer (SLO) shows that the SLO can be used to estimate the location and size of signals. One major advantage of the SLO is that it can be used with projection data rather than reconstruction data. Thus, this observer model assesses overall hardware performance independent by any reconstruction algorithm. In addition, we will show that the run time of image-quality studies is significantly reduced. Several systems derived from the GE CZT-based dedicated cardiac SPECT camera Discovery 530c design, which is officially named the Alcyone Technology: Discovery NM 530c, were assessed using the performance of the SLO for the task of detecting cardiac defects and estimating the properties of the defects. Clinically, hearts can be virtually segmented into three coronary artery territories: left anterior descending artery (LAD), left circumflex artery (LCX), and right coronary artery (RCA). One of the most important functions of a cardiac SPECT system is to produce images from which a radiologist can correctly predict in which territory the defect exists. A good estimation of the defect extent from the images is also very helpful for determining the seriousness of the myocardial ischemia. In this dissertation, both locations and extent of defects were estimated by the SLO, and system performance was assessed using localization receiver operating characteristic (LROC) / estimation receiver operating characteristic (EROC) curves. Area under LROC curve (AULC) / area under EROC curve (AUEC) and true positive fraction (TPF) at specific false positive fraction (FPF) can be treated as the figures of merit (FOMs). As the results will show, a combination of the SLO and LROC / EROC curves can determine the configuration that has the most estimation/detection information and thus is a useful method for assessing cardiac SPECT systems.
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Heckroodt, Steyn. "A study for an expanded conceptual scanning framework and the impact on current business environment scanning : a systems thinking approach". Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71671.

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Abstract (sommario):
Thesis (PhD)--Stellenbosch University, 2012.
ENGLISH ABSTRACT: The study addresses the question of whether there is a need for an expanded conceptual scanning framework that could benefit present-day business organisations. It addresses this question through the conceptualisation of such a framework, based on findings from the literature review executed during the secondary research phase of the study. Through the primary research phase, an attempt is made to reach conclusions pertaining to the research question. The extent to which businesses perform scanning and related activities as per the findings of the literature review is investigated by means of a Likert scale questionnaire presented to a sample of respondents. The study acknowledges that the imperative of environmental scanning for business organisations also holds true for non-business organisations, but focuses on business organisations that specifically drive sustainable competitiveness and increased business success. The study involves the conceptualisation of an expanded scanning framework through combining aspects and components of the ontological and epistemological dimensions prevalent in scanning and its derived activities. These derived activities include information gathering, scenario planning and strategy selection, and their impact on business performance. Furthermore, the conceptualisation of an expanded framework involves the application of a systems thinking approach in executing business environmental scanning. The inclusion of the ontological and epistemological dimensions are proposed as part of the a-priori design of an expanded conceptual scanning framework, offering the opportunity to present-day scanners to deal with matters of environmental dynamism more effectively through increased levels of understanding of the environment. The study aims to move beyond the empiricist mode of scanning and merely levels of knowledge that scanners have about the environment, to how they should approach, view, understand and manage it. The study expands on current conceptual scanning frameworks, methodologies and approaches applied by business organisations when scanning the business environment. It proposes an expanded conceptual scanning framework, which could increase the depth and width of current conceptual scanning frameworks. The aim is to provide a tool with which business organisations can increase the compound whole of information gleaned from the environment, and its integrity. The expanded framework includes a conceptualisation of the construct content of an emerging newness between two or more systems in the scanned environment. It is based on the analysis of the inter-relatedness, inter-dependence and relation between the co-contributing systems of the emerging newness and the interplay of the co-contributing systems’ aspects, characteristics, dimensions and qualities. This conceptualised inclusion of emergent newness is based on the methodological analysis of system complexities through the application of a systems thinking approach to create the expanded conceptual scanning framework. Strategy, as the juncture between environmental scanning and an organisation’s capacity, has an environment-strategy interface and an organisation-strategy interface. The proposed expanded conceptual scanning framework incorporates both the ontological environment-strategy interface and the epistemological organisation-strategy interface, which concerns a particular worldview. This worldview underpins their approach when business organisations scan the environment. The expanded conceptual scanning framework aims to enhance the understanding of environmental complexity in order to enhance the management thereof. In this regard, it deviates from the notion that enhanced management of the environment would depend on a more accurate prediction of future environmental changes. Rather, it highlights the notion of increasing the understanding of the environment, in order to manage the opportunities and threats embedded in the environment and its future dynamism better.
AFRIKAANSE OPSOMMING: Die studie ondersoek die vraag of daar ‘n behoefte is aan ‘n breër konseptuele skanderingsraamwerk wat hedendaagse besigheidsorganisasies kan bevoordeel. Dit hanteer hierdie vraag deur middel van die konseptualisasie van so ‘n raamwerk, gegrond op die bevindings van die literatuuroorsig wat gedurende die sekondêre navorsingsfase van die studie uitgevoer is. Gedurende die primêre navorsingsfase word gepoog om gevolgtrekkings rakende die navorsingsvraag te maak. Die mate waarin besighede skandering en verwante bedrywighede onderneem, volgens die bevindings uit die literatuuroorsig, word ondersoek by wyse van ‘n Likert-skaal-vraelys wat aan ‘n steekproef van respondente voorgelê is. Die studie aanvaar dat die imperatief van omgewingskandering by besigheidsorganisasies ook vir nie-besigheidsorganisasies belangrik is, maar is spesifiek toegespits op besigheidsorganisasies wat handhaafbare mededingendheid en verhoogde besigheidsukses as dryfkragte het. Die studie behels die konseptualisasie van ‘n verbreede konseptuele skanderingsraamwerk deur die saamvoeging van aspekte en komponente van die ontologiese en epistemologiese dimensies wat by skandering en die daaruit voortvloeiende bedrywighede belangrik is. Hierdie voortspruitende bedrywighede sluit in inligtingsversameling, scenario-beplanning en strategieseleksie; en die impak daarvan op besigheidsprestasie. Verder behels die konseptualisasie van ‘n verbreede konseptuele skanderingsraamwerk dat ‘n stelselsdenke-benadering by die skandering van die besigheidsomgewing toegepas word. Die insluiting van die ontologiese en epistemologiese dimensies word voorgestel as deel van ‘n a-priori-ontwerp van ‘n verbreede konseptuele skanderingsraamwerk, wat die geleentheid bied aan hedendaagse skandeerders om meer doeltreffend te werk met aangeleenthede van omgewingsdinamika deur middel van hoër vlakke van insig in die omgewing. Die studie poog om wyer as slegs die empiriese skanderingsmodus en kennisvlakke, gegrond op wat skandeerders van die omgewing weet, te beweeg, na die wyse waarop hulle dit behoort te benader, te aanskou, te verstaan en te bestuur. Die studie verbreed huidige konseptuele skanderingsraamwerke – metodologieë en benaderings – soos toegepas deur besigheidsorganisasies in hul skandering van die besigheidsomgewing. ‘n Verbreede konseptuele skanderingsraamwerk word voorgestel, wat die diepte en breedte van huidige konseptuele skanderingsraamwerke sou kon verhoog. Sodoende is hierdie studie gerig op die bydrae tot ‘n werktuig waarmee besigheidsorganisasies die saamgestelde geheel van inligting wat uit die omgewing verkry is, en die integriteit daarvan, kan verhoog. Die verbreede konseptuele skanderingsraamwerk sluit in ‘n konseptualisasie van die konstruk-inhoud van ‘n ontluikende nuutheid tussen twee of meer stelsels in die geskandeerde omgewing. Dit is gebaseer op ‘n ontleding van die interverwantheid, interafhanklikheid en verwantskap tussen die mee-bydraende stelsels van hierdie ontluikende nuutheid en die tussenspel van die stelsels se aspekte, kenmerke, dimensies en eienskappe. Hierdie gekonseptualiseerde invoeging van ‘n ontluikende nuutheid is gegrond op die metodologiese ontleding van stelselkompleksiteite deur middel van die gebruik van stelselsdenke by die toepassing van die verbreede konseptuele skanderingsraamwerk. Strategie, as die kruispunt waar omgewingskandering en ‘n organisasie se kapasiteit ontmoet, het ‘n omgewing-strategie-koppelvlak en ‘n organisasie-strategie-koppelvlak. Die voorgestelde verbreede konseptuele skanderingsraamwerk behels beide die ontologiese omgewing-strategie-koppelvlak en die epistemologiese organisasie-strategie-koppelvlak, soos dit ‘n spesifieke wêreldbeskouing mag raak. Dit onderskraag die benadering waarmee besigheidsorganisasies die omgewing skandeer. Die verbreede konseptuele skanderingsraamwerk is gerig op die verstewiging van die begrip van omgewingskompleksiteit met die doel om die bestuur daarvan te verbeter. In hierdie sin verskil dit van die siening dat die verbeterde bestuur van die omgewing afhanklik is van ‘n meer akkurate voorspelling van toekomstige omgewingsveranderings. Dit plaas die kollig op die siening dat ‘n verhoogde begrip van die omgewing dit makliker maak om die geleenthede en bedreigings wat deel is van die omgewing, en die toekomstige dinamika daarvan, beter te bestuur.
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28

Huang, Hsin-Chih. "The Impact of Multimedia on Information Scanning Effectiveness: an Empirical Study in an Executive Support Systems Environment". Thesis, University of North Texas, 1996. https://digital.library.unt.edu/ark:/67531/metadc278575/.

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This study investigates the impact of multimedia on the effectiveness of information scanning. Information scanning is the act of seeking and receiving a wide variety of special information to develop a thorough understanding of the organization and the environment. The application domain of this study is Executive Support Systems. The experimental task is to identify potential threats and opportunities, a strategic information-scanning activity, based on the information stored in three ESS prototypes. Forty subjects from four organizations participated in the experiment. A random assignment process allocated them into three groups. The control group used the text-based ESS. The first experimental group used the visual multimedia ESS. The second experimental group used the audiovisual multimedia ESS. The experiment was carried out on the sites of the participating organizations. The investigator measured the effectiveness of information scanning based on the number of threats and opportunities each subject identifies. A close-ended questionnaire measured subjects' retention of information. The results of this study support the cognitive-fit theory. The findings indicate that multimedia is not an appropriate presentation format for analytical tasks. Subjects who use text-based ESS identify significantly more threats and opportunities than subjects who use audiovisual multimedia ESS. The cognitive style of subjects does not moderate the impact of multimedia. The results show that the use of multimedia does not necessarily improve retention of information. Further research is needed to determine the most effective combination of text, graphics, animation, video, and sound.
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Clark, Kendal W. "STM Study of Molecular and Biomolecular Electronic Systems". Ohio University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1282363151.

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30

Chava, Nalini. "Administrative reporting for a hospital document scanning system". Virtual Press, 1996. http://liblink.bsu.edu/uhtbin/catkey/1014839.

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This thesis will examine the manual hospital document retrieval system and electronic document scanning system. From this examination, requirements will be listed for the Administrative Reporting for the Hospital Document Scanning System which will provide better service and reliability than the previous systems. To assure that the requirements can be met, this will be developed into a working system which is named as the Administrative Reporting for the Hospital Document Scanning System(ARHDSS).
Department of Computer Science
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Törnblom, Nils. "Underwater 3D Surface Scanning using Structured Light". Thesis, Uppsala universitet, Centrum för bildanalys, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-138205.

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In this thesis project, an underwater 3D scanner based on structured light has been constructed and developed. Two other scanners, based on stereoscopy and a line-swept laser, were also tested. The target application is to examine objects inside the water filled reactor vessel of nuclear power plants. Structured light systems (SLS) use a projector to illuminate the surface of the scanned object, and a camera to capture the surfaces' reflection. By projecting a series of specific line-patterns, the pixel columns of the digital projector can be identified off the scanned surface. 3D points can then be triangulated using ray-plane intersection. These points form the basis the final 3D model. To construct an accurate 3D model of the scanned surface, both the projector and the camera need to be calibrated. In the implemented 3D scanner, this was done using the Camera Calibration Toolbox for Matlab. The codebase of this scanner comes from the Matlab implementation by Lanman & Taubin at Brown University. The code has been modified and extended to meet the needs of this project. An examination of the effects of the underwater environment has been performed, both theoretically and experimentally. The performance of the scanner has been analyzed, and different 3D model visualization methods have been tested. In the constructed scanner, a small pico projector was used together with a high pixel count DSLR camera. Because these are both consumer level products, the cost of this system is just a fraction of commercial counterparts, which uses professional components. Yet, thanks to the use of a high pixel count camera, the measurement resolution of the scanner is comparable to the high-end of industrial structured light scanners.
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Martin, A. C. S. "Comb shaped polymer-salt systems : A.C. conductivity and differential scanning calorimetry studies". Thesis, University of Stirling, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382751.

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Mortimer, Beth Ann 1965. "A scanning grating technique for measurement of submicron focused spots". Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/291569.

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Many applications in optical research require the use of diffraction limited point images with reduced spot sizes. The instrumentation that evaluates these small diameter images must have high resolution (sub-micron) capabilities. One method used to measure sub-micron optical point images is a scanning grating technique. However, many characteristics of this measurement technique have not been fully examined. In this paper, the sensitivity of this measurement technique to the scanning mechanism, beam characteristics, and grating tilt is evaluated.
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Merkl, Frank J. "Binary image compression using run length encoding and multiple scanning techniques /". Online version of thesis, 1988. http://hdl.handle.net/1850/8309.

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Bergstrom, Torbjorn S. "Investigation of measurement artifacts introduced by horizontal scanning surface profiling instruments". Link to electronic thesis, 2002. http://www.wpi.edu/Pubs/ETD/Available/etd-0108102-131441.

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Münks, Matthias [Verfasser]. "Scanning Tunneling Microscopy and Atomic Force Microscopy Measurements on Correlated Systems / Matthias Münks". Konstanz : Bibliothek der Universität Konstanz, 2017. http://d-nb.info/1142788520/34.

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Savas, Sinan. "A systems approach in product design of a novel single-pan scanning calorimeter". Thesis, University of Leicester, 2015. http://hdl.handle.net/2381/31482.

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Industrial processes, such as casting and welding, are frequently simulated using computer models which require the materials thermophysical properties of alloys as a function of temperature with higher precision. These properties include the heat capacity, the enthalpy, the thermal conductivity the liquid fraction and the solid fraction. The thermophysical data is normally measured using thermal analysis methods; the most common instrument used is the Differential Scanning Calorimeter (DSC). However, accuracy in the DSC measurement is limited by the instrument kinetics because it measures the thermal response of a furnace to a crucible that contains the sample, rather than a direct measurement. In particular, when phase transition occurs in a sample, several problems arise including significant errors in measuring apparent transition temperatures and enthalpy changes of the transition. Continuous efforts are often devoted to designing calorimeters that can measure materials thermophysical properties with a higher accuracy. Recently Dong and Hunt proposed a Single-Pan Scanning Calorimetry (SPSC) which can significantly reduce the measurement error via a novel single-pan concept. In this study, the systems approach has been adopted to examine the product for the SPSC. The systems approach involves the use of appropriate methods in a strategic manner that should lead to better product design. Measuring the transition temperature and enthalpy change of pure aluminium and some commercial aluminium alloys has tested the designed and built calorimeter. The measured results revealed a high accuracy in enthalpy data, excellent reproducibility and high resolution in determining transient temperature. It is concluded that the new instrument is a promising device that can achieve reliable and reproducible materials thermophysical data.
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Sahba, Kaveh. "Motionless wide angle laser scanning for object detection and multi-spectral discrimination". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2008. https://ro.ecu.edu.au/theses/175.

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Terrestrial laser screening has become an essential tool in may industries requiring digital three-dimensional reconstruction of an object or scene. These include civilian applications such as surveying, automobile collision avoidance, 3D animation modelling, mobile robot navigation, industrial inspection, traffic monitoring and more. The military has also employed laser scanning technology for projectile guidance, gun fire ranging measurements, surveillance, sattelite and missile tracking and target recognition. In the last decade, terrestrial laser scanning has found new use as an active optical sensor for indoors and outdoors perimeter security. In the intrusion detection field, laser scanning holds many advantages over conventional passive infrared sensors and active post-to-post laser sensors. Its key features are the ability to determine the intrusion size, speed and precise location. Nuisance and false alarm rates are also minimized since ignoring objects based on speed and size is possible.
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Neethling, Pieter. "Determining non-linear optical properties using the Z-scan technique". Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1135.

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Waechter, Frederick K. "A mathematical analysis of an electronic dot generating scanner for dot resolution and tone reproduction /". Online version of thesis, 1987. http://hdl.handle.net/1850/10436.

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McGeorge, Nicolette M. "The effect of training, aim pattern and target type on the ergonomics and efficiency of handheld scanners /". Online version of thesis, 2009. http://hdl.handle.net/1850/10643.

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42

Brereton, Luke James. "A study of shear-force microscopy and its application to liquid-crystal and biological systems". Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266886.

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43

Zhao, He. "Probing the Strongly Correlated Quantum Materials with Advanced Scanning Tunneling Microscopy/Spectroscopy:". Thesis, Boston College, 2020. http://hdl.handle.net/2345/bc-ir:108971.

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Thesis advisor: Ilija Zeljkovic
We used spectroscopic-imaging scanning tunneling microscopy (SI-STM) and spin-polarized STM (SP-STM) to unveil new electronic phenomena in several different quantum systems. We explored: (1) a potential topological superconductor heterostructure Bi₂Te₃/Fe(Te, Se), (2) high-Tc superconductors − Bi₂Sr₂CaCu₂O₈₊ₓ and Fe(Te, Se), and (3) doped spin-orbit Mott insulators Sr₂IrO₄ and Sr₃Ir₂O₇. In Bi₂Te₃/Fe(Te, Se), we observed superconductivity (SC) on the surface of Bi₂Te₃ thin film, induced by the iron-based superconductor substrate. By annealing the optimally-doped cuprate superconductor Bi₂Sr₂CaCu₂O₈₊ₓ, we drastically lowered the surface hole doping concentration to detect a unidirectional charge stripe order, the first reported charge order on an insulating (defined by the spectral gap with zero conductance spanning the Fermi level) cuprates surface. In the high-Tc SC Fe(Te, Se) single crystal, we found local regions of electronic nematicity, characterized by C₂ quasiparticle interference (QPI) induced by Fermi surface anisotropy and inequivalent spectral weight of dyz and dxz orbitals near Fermi level. Interestingly, the nematic order is locally strongly anti-correlated with superconductivity. Finally, utilizing SP-STM, we observed a short-range antiferromagnetic (AF) order near the insulator-metal transition (IMT) in spin-orbital Mott insulators Sr₂IrO₄ and Sr₃Ir₂O₇. The AF order inhomogeneity is found not to be strongly correlated with the charge gap. Interestingly, the AF order in the bi-layered Sr₃Ir₂O₇ shows residual memory behavior with temperature cycling. Overall, our work revealed new phenomena in a range of today’s most intriguing materials and set the stage for using SP-STM in other complex oxides
Thesis (PhD) — Boston College, 2020
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Physics
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44

Elofson, Gregg Steven. "Facilitating knowledge sharing in organizations: Semiautonomous agents that learn to gather, classify, and distribute environmental scanning knowledge". Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184743.

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Evaluating patterns of indicators is often the first step an organization takes in scanning the environment. Not surprisingly, the experts that evaluate these patterns are not equally adept across all disciplines. While one expert is particularly skilled at recognizing the potential for political turmoil in a foreign nation, another is best at recognizing how Japanese government de-regulation is meant to complement the development of some new product. Moreover, the experts often benefit from one another's skills and knowledge in assessing activity in the environment external to the organization. One problem in this process occurs when the expert is unavailable and can't share his knowledge. And, addressing the problem of knowledge sharing, of distributing expertise, is the focus of this dissertation. A technical approach is adapted in this effort--an architecture and a prototype are described that provide the capability of capturing, organizing, and delivering the knowledge used by experts in classifying patterns of qualitative indicators about the business environment. Using a combination of artificial intelligence and machine learning techniques, a collection of objects termed "Apprentices" are employed to do the work of gathering, classifying, and distributing the expertise of knowledge workers in environmental scanning. Furthermore, an archival case study is provided to illustrate the operations of an Apprentice using "real world" data.
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Schroder, Ulf P. "Development of a weather radar signal simulator to examine sampling rates and scanning schemes". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FSchroder.pdf.

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Mainprize, James Gordon. "The effect of phosphor persistence on image quality in digital x-ray scanning systems". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0005/MQ28777.pdf.

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47

Ebels, Ursula. "Scanning Kerr microscopy of magnetic domains in epitaxial Fe/GaAs(001) thin film systems". Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389827.

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48

Hirachand, Katan. "The formation, decomposition and inhibition of clathrate hydrate systems measured by differential scanning calorimetry". Thesis, King's College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324673.

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49

Borth, David J. "Non-Destructive Evaluation of Urethane-Ester Coating Systems Using the Scanning Kelvin Probe Technique". University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1524749968517527.

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50

Yang, Guohua. "Molecular-level investigations of model membrane systems : a scanning tunneling microscopy and nanoengineering approach /". For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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