Hiroshima Institute of Technology Academic Repository
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Study of Networking CAD for Personal Area Wireless Sensor Network
Get PDFapplication/pdfRecently, sensor-network has been extending to near-field application using extremely low power devices. However, when an integrated small size and low transmission power consumption device is used for the network construction, it is difficult to know the communication reliability for the node mapping beforehand. This paper describes the concept of application software for the tablet or the smart-phone, which assists the telecommunications equipment installation position considering the RF propagation for the sensor networking.conference pape
Study of short-range radio wave propagation of sensor nodes using the pattern antenna －Theoretical study of ground and water surface reflection－
Get PDFapplication/pdfRecently, near field wireless sensor network advanced miniaturization by a λ/4 antenna and a pattern antenna, and is expanding to enviroment monitor systems. But, transmitted signal strength is kept below 10 mW in general in order to achieve low power consumption, therefore optimn setting is difficult to general users. This paper assumes that construct network (2.4GHz and 920MHz) on rivers and lakes surface, and consider radio wave propagation on water face of between terminals having pattern antenna.conference pape
A study of appropriate evacuation instruction using multi-agent simulation
Get PDFapplication/pdfIt is important to instruct persons to evacuate smoothly and hastily at the time of natural disasters in order to reduce the number of victims. We performed multi-agent simulation to clarify the difference of evacuation behaviors between with and without evacuation instruction. As a result, it was revealed that evacuation instruction is useful to promote evacuation activity especially for the persons of trailing type.conference pape
A Study on Detecting, Tracking and Counting People without RFID Tags among People with and without Them
Get PDFapplication/pdfIndoor positioning technologies to position people with RFID tags and smart phones are progressing rapidly and begin to be put to practical use in o2o services and smart security systems. On the other hand, surveillance systems to position unspecified people are used widely in security and space utilization planning. Some useful systems and services are possible by using the positioning information of people with and without tags, such as a security system for patients in a hospital, an intruder detection system in a building and efficient client services in a large-scale retail store. We consider techniques to detect, track and count people without tags among people with and without them. A device to detect people with and without RFID tags consists of two sub devices. One detects RFID tags within a relatively small area around an antenna and another detects people within the tag detection area. The devices should be installed at any places where people have to walk through to move one area to another in a building.conference pape
Computation Method of Stackelberg Solutions for Two-level Nonlinear Programming Problems Based on PSO and Clustering Using Strategic Oscillation
Get PDFapplication/pdfIn the present paper, the derivation of Stackelberg solutions for two-level nonlinear programming problems (TLNLPPs) including two decision makers with different priorities is focused on. In order to obtain (approximate) Stackelberg solutions to TLNLPPs more efficiently, we attempt to improve the performance of a PSO-based method using strategic oscillation.conference pape
A educational improvement by notebook PC introduction in survey study training
Get PDFapplication/pdfSurvey training is an important subject of an engineering-works subject of study. It happened, when the following problems advanced a lecture in recent years. A student in recent years has little those who can take notes just primarily, Since the report was submitted later, it tends to become disorderly to perform this calculation on a note and there was a many steps calculation process, while student confidence understood the meaning of each calculation process just, calculation was advanced or there was a question.
Then, we decided to perform calculation of this closed traverse using the spreadsheet of Excel from the last fiscal year.
In order to make each of the processes of the traverse calculation which is an important element when you understand survey study understand firmly, I replace the portion over which it passes only to calculation already simple for a college student by Excel, and think that it was effective that an understanding enabled it to learn an important part preponderantly.departmental bulletin pape
Study on response reduction of two-story anti-symmetric Z-type NC braced frame
Get PDFapplication/pdfNew structural system of anti-symmetric Z-type NC brace is proposed by the authors. This system possesses reduction capacity of earthquake response due to elastic strain energy absorption of distortion of the structure. Numerical analysis of two-story space frame is carried out to extend the study on the single-story frame. Elastic and elastic-plastic behavior of the two-story structure is examined efficiency of the system in comparison with the structure with hysteretic dampers.departmental bulletin pape
Evaluation of Method of Measuring Gravity in Higher-Dimensional Spacetime Derived from Superstring Theory ― Atomic Force Microscopy ―
Get PDFapplication/pdfBased on the brane world scenario derived from the superstring theory, this article examines a possibility of detecting higher-dimensional spacetime with an atomic force microscope (AFM). The spacetime assumed in this scenario contains an extra dimension in addition to the“ observed” (1 + 3)-dimensional spacetime, where the 3-dimensional space, i.e., the universe is called the brane world. The extra dimension is supposed to have d spacial dimensions and be compactified in the small region of a size. The following facts play essential roles in our discussion; only the gravity spreads over the extra dimension as well as the brane, and the strength of the gravity in the extra dimension is stronger than that in the brane, so-called, the Newtonian gravity. We first calculate the size of the extra dimension and the gravitational constant in it. Using the results, we estimate whether AFM can detect the extra dimension by measuring the gravitational force and interval between two xenonatoms. We find that the strength of gravity becomes stronger and the interval shorter in extra dimensions, d ＝ 1, 2, 3. These values are too small to be detected with AFM.departmental bulletin pape
Experimental study on beam connection with wedge-device used long-length bolt
Get PDFapplication/pdfThe wedge-device used long-length bolt is proposed to solve problems of the beam connection with the wedge-device. Loading tests of the beam connection are conducted to examine the restoring force characteristics. Cyclic loading tests of T-type specimen with long-length-bolted connection show increase-from-origin-type restoring force characteristics with less stiffness.departmental bulletin pape
Proposal of intermittent operation control algorithm for a low power-consumption network
Get PDFapplication/pdfThe sensor node in a network is fundamentally asked for low-power-consumption, and it is essential to activate the node for the a necessary minimum time, using intermittent operation or a sleep mode.
\nIn this paper, it carries out in the application to the wave observation equipment of fisheries, and proposes the algorithm of operation as the system block which controls intermittent time and data acquisition time dynamically according to the situation of a wind waves.conference pape