Location determination and tracking using radio beacons

2005 ◽  
Author(s):  
V. Zarimpas
Keyword(s):  
Location Determination

scholarly journals High-Precision RTT-Based Indoor Positioning System Using RCDN and RPN

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3701
Author(s):  
Ju-Hyeon Seong ◽  
Soo-Hwan Lee ◽  
Won-Yeol Kim ◽  
Dong-Hoan Seo
Keyword(s):  
High Precision ◽  
Distance Estimation ◽  
Sampling Period ◽  
Multipath Fading ◽  
Indoor Positioning ◽  
Positioning System ◽  
Positioning Systems ◽  
Positioning Errors ◽  
Location Determination ◽  
Indoor Positioning System

Wi-Fi round-trip timing (RTT) was applied to indoor positioning systems based on distance estimation. RTT has a higher reception instability than the received signal strength indicator (RSSI)-based fingerprint in non-line-of-sight (NLOS) environments with many obstacles, resulting in large positioning errors due to multipath fading. To solve these problems, in this paper, we propose high-precision RTT-based indoor positioning system using an RTT compensation distance network (RCDN) and a region proposal network (RPN). The proposed method consists of a CNN-based RCDN for improving the prediction accuracy and learning rate of the received distances and a recurrent neural network-based RPN for real-time positioning, implemented in an end-to-end manner. The proposed RCDN collects and corrects a stable and reliable distance prediction value from each RTT transmitter by applying a scanning step to increase the reception rate of the TOF-based RTT with unstable reception. In addition, the user location is derived using the fingerprint-based location determination method through the RPN in which division processing is applied to the distances of the RTT corrected in the RCDN using the characteristics of the fast-sampling period.

scholarly journals UAV-Driven Structural Crack Detection and Location Determination Using Convolutional Neural Networks

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2650
Author(s):  
Daegyun Choi ◽  
William Bell ◽  
Donghoon Kim ◽  
Jichul Kim
Keyword(s):  
Visual Information ◽  
Crack Detection ◽  
Image Data ◽  
Image Processing Techniques ◽  
Location Determination ◽  
Aerial Vehicle ◽  
Using Data ◽  
Processing Techniques ◽  
Deep Learning Model ◽  
Structural Cracks

Structural cracks are a vital feature in evaluating the health of aging structures. Inspectors regularly monitor structures’ health using visual information because early detection of cracks on highly trafficked structures is critical for maintaining the public’s safety. In this work, a framework for detecting cracks along with their locations is proposed. Image data provided by an unmanned aerial vehicle (UAV) is stitched using image processing techniques to overcome limitations in the resolution of cameras. This stitched image is analyzed to identify cracks using a deep learning model that makes judgements regarding the presence of cracks in the image. Moreover, cracks’ locations are determined using data from UAV sensors. To validate the system, cracks forming on an actual building are captured by a UAV, and these images are analyzed to detect and locate cracks. The proposed framework is proven as an effective way to detect cracks and to represent the cracks’ locations.

Fluid Ingress Location Determination Using Distributed Temperature and Acoustic Sensing

2015 ◽  
Author(s):  
Thomas Williams ◽  
Erik Lee ◽  
Jeff Chen ◽  
Xiaowei Wang ◽  
David Lerohl ◽  
...  
Keyword(s):  
Acoustic Sensing ◽  
Location Determination

Complete Mitochondrial Genome Sequence Analysis and Phylogenetic Location Determination of Hydropsyche Fryeri (Insecta: Trichoptera)

2021 ◽  
Author(s):  
Yimin Li ◽  
Honglin Qin ◽  
Xifa Zhong ◽  
Jingcai Huang ◽  
Yujun Wang ◽  
...  
Keyword(s):  
Mitochondrial Genome ◽  
Genome Sequence ◽  
Complete Mitochondrial Genome ◽  
Phylogenetic Tree Analysis ◽  
Protein Coding ◽  
Mitochondrial Genome Sequence ◽  
Complete Mitochondrial Genome Sequence ◽  
Location Determination ◽  
The Family

Abstract Hydropsyche fryeri belongs to the Trichopteridae family and builds nests in clean and unpolluted streams using stones. It also can be used as an indicator of water quality. Here, we describe the complete mitochondrial genome sequence of Hydropsyche fryeri. The mitochondrial genome is 15,676 bp long and contains 13 protein-coding genes, 22 tRNAs, 2 rRNAs and an AT-rich control region. Phylogenetic tree analysis shows that Hydropsyche fryeri is more closely related to the family Hydroptera than other Trichoptera.

scholarly journals PENENTUAN LOKASI TOWER CRANE PADA PROYEK KONSTRUKSI BERBASIS SIMULASI

2020 ◽  
Vol 3 (4) ◽  
pp. 1305
Author(s):  
Gerwyn Persulessy ◽  
Basuki Anondho
Keyword(s):  
Travel Time ◽  
Construction Projects ◽  
Tower Crane ◽  
Location Determination ◽  
Heavy Equipment ◽  
Total Travel Time ◽  
Speed Up ◽  
High Level ◽  
Map Data ◽  
Geometric Layout

Development of high-level building construction projects that require complex equipment that can be used in high-level construction, equipment used to help complete construction projects called heavy equipment. One of the heavy equipment used in high-rise buildings is a tower crane. The use and layout of tower cranes can speed up the schedule and save on project costs. Therefore many methods have been developed to determine the tower crane layout. This study will discuss determining the location of tower cranes by discussing simulations. The location will be determined based on the site map data which is processed in the form of a geometric arrangement and tower crane data specifications. Location determination is done by comparing the total travel time of several simulated locations according to several different speed criteria in a construction project. Speed criteria are divided into four times the jib speed and trolley speed. Location of the location with the total travel time will be taken as the final result. Different speed criteria will make the total travel time change. ABSTRAKPerkembangan proyek pembangunan gedung bertingkat tinggi yang semakin kompleks menyebabkan diperlukannya peralatan yang dapat mempermudah pembangunan gedung bertingkat, peralatan yang digunakan untuk membantu menyelesaikan tugas konstruksi disebut alat berat. Salah satu peralatan berat yang digunakan pada gedung bertingkat tinggi adalah tower crane. Penggunaan dan tata letak tower crane yang baik dapat mempercepat jadwal dan menghemat biaya proyek. Oleh karena itu banyak dikembangkan metode-metode untuk menentukan tata letak tower crane. Penelitian ini akan membahas penetapan letak lokasi tower crane dengan pendekatan  simulasi. Letak lokasi akan ditetapkan berdasarkan data site map yang diolah dalam bentuk geometric layout dan data spesifikasi tower crane. Penetapan lokasi dilakukan dengan cara membandingkan total travel time dari beberapa lokasi yang disimulasi sesuai dengan beberapa kriteria kecepatan yang berbeda-beda pada suatu proyek konstruksi. Kriteria kecepatan terbagi menjadi empat berdasarkan besarnya kecepatan jib dan kecepatan trolley. Letak lokasi dengan total travel time terkecil akan diambil sebagai hasil akhir. Kriteria-kriteria kecepatan yang berbeda disimulasi akan membuat total travel time berubah.

scholarly journals STRATEGI PEMASARAN USAHA KECIL MENENGAH PADA IBU-IBU AISYIAH MUHAMMADIYAH BALI

2020 ◽  
Vol 1 (1) ◽  
pp. 17
Author(s):  
Tri Budiyanto
Keyword(s):  
Marketing Strategies ◽  
Location Determination ◽  
Service Activity ◽  
Small Medium Enterprises ◽  
Medium Enterprises ◽  
Bahasa Indonesia

Most of the Aisyiah womens in the Muhammadiyah Bali region have side jobs as housewives. Various businesses include Small Medium Enterprises (in Bahasa Indonesia, Usaha Kecil dan Menengah) engaged in grocery stalls, selling cloth, food stalls, furniture businesses, Muslim fashion stores and others. Some of the obstacles faced in developing their businesses include capitalization, management and location determination, as well as the quality of production as well as marketing.The purpose of this service activity is to equip Aisyiah Muhammadiyah Bali women in implementing marketing strategies that are in line with their business and competing in marketing. The benefits of this dedication for Aisyiah's mothers are getting knowledge and understanding related to the marketing field.

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