305 An automatic registration procedure for use in RC film dosimetry by means of double exposure

Sensor Web and Internet of Things (IoT) (SW-IoT) have been attracting attention from various fields. Both of them deploy networks of embedded devices to monitor physical properties (i.e., sensing capability) or to be controlled (i.e., tasking capability). One of the most important tasks to realize the SW-IoT vision is to establish an open and interoperable architecture, across the device layer, gateway layer, service layer, and application layer. To achieve this objective, many organizations and alliances propose standards for different layers. Among the standards, Open Geospatial Consortium (OGC) SensorThings API is arguably one of the most complete and flexible service standards. However, the SensorThings API only address heterogeneity issues in the service layer. Embedded devices following proprietary protocols need to join closed ecosystems and then link to the SensorThings API ecosystem via customized connectors. To address this issue, one could first follow another device layer and gateway layer open standards and then perform data model mapping with the SensorThings API. However, the data model mapping is not always straightforward as the standards were designed independently. Therefore, this research tries to propose a more direct solution to unify the entire SW-IoT architecture by extending the SensorThings API ecosystem to the gateway layer and the device layer. To be specific, this research proposes SW-IoT Plug and Play (IoT-PNP) to achieve an automatic registration procedure for embedded devices. The IoT-PNP contains three main components: (1) A description file describing device metadata and capabilities, (2) a communication protocol between the gateway layer and the device layer for establishing connections, and (3) an automatic registration procedure for both sensing and tasking capabilities. Overall, we believe the proposed solution could help achieve an open and interoperable SW-IoT end-to-end architecture based on the OGC SensorThings API.

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PLANE-BASED REGISTRATION OF SEVERAL THOUSAND LASER SCANS ON STANDARD HARDWARE

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-2-1207-2018 ◽

2018 ◽

Vol XLII-2 ◽

pp. 1207-1212 ◽

Cited By ~ 4

Author(s):

D. Wujanz ◽

S. Schaller ◽

F. Gielsdorf ◽

L. Gründig

Keyword(s):

Memory Management ◽

Critical Issue ◽

Automatic Registration ◽

Topological Relations ◽

Town Hall ◽

Registration Procedure ◽

Stochastic Characteristics ◽

Pairwise Registration

The automatic registration of terrestrial laser scans appears to be a solved problem in science as well as in practice. However, this assumption is questionable especially in the context of large projects where an object of interest is described by several thousand scans. A critical issue inherently linked to this task is memory management especially if cloud-based registration approaches such as the ICP are being deployed. In order to process even thousands of scans on standard hardware a plane-based registration approach is applied. As a first step planar features are detected within the unregistered scans. This step drastically reduces the amount of data that has to be handled by the hardware. After determination of corresponding planar features a pairwise registration procedure is initiated based on a graph that represents topological relations among all scans. For every feature individual stochastic characteristics are computed that are consequently carried through the algorithm. Finally, a block adjustment is carried out that minimises the residuals between redundantly captured areas. The algorithm is demonstrated on a practical survey campaign featuring a historic town hall. In total, 4853 scans were registered on a standard PC with four processors (3.07&thinsp;GHz) and 12&thinsp;GB of RAM.

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A Device for Magnification Measurement

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100096369 ◽

1972 ◽

Vol 30 ◽

pp. 622-623

Author(s):

J.A. Eades ◽

A. van Dun

Keyword(s):

Electron Microscope ◽

Small Displacement ◽

Private Communication ◽

Piezoelectric Crystal ◽

Double Exposure ◽

Standard Methods ◽

Elegant Method ◽

The Right ◽

Piezo Electric

The measurement of magnification in the electron microscope is always troublesome especially when a goniometer stage is in use, since there can be wide variations from calibrated values. One elegant method (L.M.Brown, private communication) of avoiding the difficulties of standard methods would be to fit a device which displaces the specimen a small but known distance and recording the displacement by a double exposure. Such a device would obviate the need for changing the specimen and guarantee that the magnification was measured under precisely the conditions used.Such a small displacement could be produced by any suitable transducer mounted in one of the specimen translation mechanisms. In the present case a piezoelectric crystal was used. Modern synthetic piezo electric ceramics readily give reproducible displacements in the right range for quite modest voltages (for example: Joyce and Wilson, 1969).

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Therapist in Double Exposure

Contemporary Psychology ◽

10.1037/007350 ◽

1964 ◽

Vol 9 (1) ◽

pp. 2-3

Author(s):

FRED FOSMIRE

Keyword(s):

Double Exposure

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Concerning the Representativeness of Psychiatric Catamnestical Studies - The Influence of Various Approach Strategies on the Response of Former Patients

Methods of Information in Medicine ◽

10.1055/s-0038-1635462 ◽

1986 ◽

Vol 25 (03) ◽

pp. 171-175

Author(s):

I. Steinhart ◽

G. Bosch ◽

Th. Muhr ◽

E. Mohlfeld

Keyword(s):

Total Population ◽

Social Psychiatry ◽

Personal Contact ◽

Sample Collection ◽

Careful Planning ◽

Research Project ◽

Phone Calls ◽

Registration Procedure

SummaryThe possible conclusions reached by catamnestical studies are often significantly restricted because of the lack of representativeness of the sample. The example of an investigation of former patients of the Department of Social Psychiatry proves that positive responses to an interview are influenced by various factors. As expected, patients were more inclined to participate in the research project the closer their discharge was to the time of the project itself. Further, it became clear that various different approach strategies, such as letters, enquiries with the registration authorities, phone calls and house visits, effectively increased the motivation of former patients, and that only this kind of graded registration procedure guarantees motivation leading to a sample representative of the total population. Personal contact plays an especially important role. These empirical findings indicate the necessity of careful planning and implementation of sample collection in catamnestical studies. Without this approach, representative results cannot be expected.

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