Applied Mechanics and Materials Vols. 752-753

Abstract: The article is describing a ground massif with a Slinky heat exchanger as a heat source for a heat pump, which is used for cold water warming and a heating of an administration building. The object of the research is to analyse the influence of the heat exchanger on the ground massif temperature while extracting heat energy at the beginning and during the heating season 2012 - 2013, as well as beyond it. Based on executed measurements the process of the ground massif temperatures near the exchanger is described. Also described is temperature process of the ground massif on a reference lot in a burial depth of the heat exchanger, and also subsurface temperatures in a depth of 0.2 m. The energy potential of the ground massif was evaluated using the difference of temperatures of the ground massif in the area of the Slinky heat exchanger at the beginning and at the end of the heating season.

Abstract: At present, the development of biometrics is a widely discussed topic. This research discusses the reliability of the most used category - identification using fingerprints. There are many of these types of systems. The most affordable, and therefore the most common alternative is one that identifies users using an optical sensor. Testing was conducted on two scanners only for fingerprints, and on two systems that recognize users via their fingerprints and also through a facial image. The conclusions from the measurements were that reliability was mainly affected by the characteristics of the scanners, in particular whether the scanner identifies only based on the fingerprint, or in combination with another biometric method. Due to the fact that with combined systems manufacturers focus only on one identification circuit – usually the most modern - and not the potentially safest, i.e. a fingerprint, the results show that it is much easier to sabotage dual biometric identification devices than those that identify solely on the basis of a fingerprint. Reliability values ​​greatly exceed the values specified by the manufacturer. The measurements show that there is a need to continuously improve dual biometric identification systems.

Abstract: In this paper, a simple yet robust algorithm for texture identification using 1 Dimensional Discrete Fourier Transform (1-D DFT) and Dynamic Time Warping (DTW) is presented with illumination variations. In the first stage, several image processing techniques namely Fuzzy C means (FCM) clustering, edge detection, Otsu thresholding and inverse surface thresholding method are utilized to locate the region of interest (ROI) where defects might exist. Next, the image undergoes the feature extraction process using 1-D DFT and finally, the features are classified using DTW. Several defect images consist of 2 types of defect namely the porosity and crack are experimented and classified using the DTW.

Abstract: The use of wind power has been rising up rapidly due to its power potential and the improvement of technology. In order to extend the max capacity of power output, the size of wind turbine should grow simultaneously. Therefore, a cost effectiveness of wind power plant is needed to improve the performance. This paper aims at designing a novel hydraulic pitch actuator to implement pitch control effectively even if an impulsive wind peak appears. By developing a novel hydraulic pump control system, the creative design of hydraulic pump control system comprising a fixed displacement pump driven by a servo motor, two unsymmetrical hydraulic cylinders, and hydraulic circuits, could have an excellent response in operation. Furthermore, a feedback linearization controller was designed to compensate for the nonlinearity of hydraulic system and overcome the impulsive loadings from wind peaks. The turbine model was built through FAST released by NREL and the dynamic performance showed the excellent robustness and response with that proposed controller and mechanical design.

Abstract: The purpose of this research is a design and implementation of a smallest wireless fingerprint device based on Arduino Yún board. This system applies for using in class attendance checking in school or university. The exper-imental of class attendance using wireless fingerprint in this research is examinations in Kasetsart University Siracha Campus, Thailand for case study. All hardware environments of this system-using platform of Arduino Yún board and Ubuntu OS apply with computer program like MySQL, JavaScript, Apache server, and wireless network for building an embedded fingerprint authentication system. Design of a new smallest wireless fingerprint in this research is small and easy to use. It has a LCD screen for show the result of identifying after users scan they fingerprint on it. This system is applying to use in class attendance. When student come in a class he or she scan his fingerprint on our device for checking and authentications. After device receive data from his fingerprint then device send this data to server using wireless network. When server get the data by device from network already, it will send this data to fingerprint authentications program for loading and checking data of fingerprint in database. If his fingerprint data is match one of data in database the server will be sent the name and information of matching fingerprint data back to LCD screen of device and show valid text on the screen and update the status of fingerprint owner to attendance system. If his fingerprint not math in all of data in database, it invalid. This research help an instructor for reduce time for checking student attendance; solve the problem about some student absent but his or her friend fake attendance for him. And in the future this device will be replacing the student ID card

Abstract: Health-care situations in present have pass to be a technology-based. In addition to handheld devices like a mobile phone and their habit has risen abundant in current period. This research presents the design and implementation of application on IPhone for patient health-care. A physique zone network is a WIFI of biomedical sensors that are around to a man body. The aim of wireless body area network is to assist the progress of continuous recording and monitoring of a person’s health circumstances and transfer it over a long-distance exchanging network. The parameters sensed by the distinctive devices are to be moved onto a mobile phone or a tablet using wireless network. This information is then assembled, stored, check for threshold and then sent to the doctor for constant monitoring of the patient’s health condition. The doctor can thus access the patient’s health status on the go and this will help the patient to get suddenly attention in life-threatening situations.

Abstract: In Thailand Manufacturing, checking employee attendance is one of the important issues for human resource, because many manufacturing evaluate employees’ attendance and while giving the final bonus, HRs considers their total number of appearances on manufacture during the whole work time. This brings to the idea of having some tool to control employees’ attendance. Some manufacturing prefer to use paper sheet for controlling attendance, whereas some manufacturing prefer to use paper sheet for checking employees' attendance and after this, fill out these information into a system manually, like Thailand Manufacturing in Siracha Province does. However, this is not an efficient way since there will be spent much of time for checking employees names and putting marks like "presence" or "absence". Moreover, some employees may call his/her friend as "presence" even though this employee is currently absent. After thinking all these issues, researcher of the following research paper decided to create a system that makes easier to check employees’ attendance automatically, and this system is implemented in Thailand Manufacturing near SiRacha province. Actually, this is the first time when such kind of system is being used in manufacturing system of Thailand. The system is based on 1D barcode technology and run on mobile application with Android OS, and in this paper, details of this system are presented.

Abstract: The authentication of a person is used to determine the stage of the transaction, such as a password or authentication by biometric verification. However, the majority such as financial transactions, and communications sector confirmed the use of credit cards and checks your ID card at all. Biometric identification method fingerprints, photographs, and signatures, especially the signature is the most popular. It is simple and easy to use. The signature can be easily copied in a short time because it does not require any special tools or equipment tampering. This paper presents the person identification using handwritten signatures is based on the detection of movement and HC2D Barcode false acceptance rate and false rejection rate is 0 and 0.2.

Abstract: Based on the analysis of the aircrafts oxygen supply performance, an new electronic oxygen supply regulator is designed. Meanwhile, the design calculation work is conducted and the structure parameters is obtained. From the results we can see that the designed oxygen regulator can satisfy the pilot’s oxygen demand under designed heights and that oxygen flow rise under different outlet pressures is not boundless as the valve opening width is increasing .Furthermore, when the valve opens to the half of its radius, the oxygen flow no longer changes as the opening width is increasing. Also, when it opens to the maximum, the peak demand under emergency can be satisfied.

Abstract: This paper presents a tool for 3D object mosaic. Given a set of background removed input images, we first compute a 3D reconstructed volumetric model body using shape from silhouette. The granularity of a volumetric body is the user input. Voxel center coordinates, voxel color, and surface normal of the voxel are computed for 3D mosaic. The voxels of reconstructed volumetric body are replaced by primitive shapes such as sphere, cylinder, cone, etc. We call this process as a 3D mosaic. The background-eliminated input images may contain information on body parts supplied by a user. Using information on body parts, only a part of 3D reconstructed volumetric body is replaced by a new shape while the rest of body retains voxel information. The surface normal values are used for primitive shapes with direction such as a cone. 3D mosaic can be used for emphasizing or deemphasizing a part of 3D reconstructed model body, similar to the function of a 2D image mosaic. Emphasizing and deemphasizing is done by resolution, surface normal, size of body parts, color and/or shape of the 3D primitive object.