Global Positioning System: A Case Study Focused on Systems Engineering

Author(s):  
Randall Bullard ◽  
John Colombi ◽  
G. Richard Freeman
Insight ◽  
2008 ◽  
Vol 11 (4) ◽  
pp. 40-44
Author(s):  
George Richard Freeman ◽  
Randall Bullard ◽  
John Colombi

2008 ◽  
Vol 18 (1) ◽  
pp. 1430-1436
Author(s):  
Randall Bullard ◽  
John Colombi ◽  
G. Richard Freeman

2011 ◽  
Vol 367 ◽  
pp. 223-231 ◽  
Author(s):  
P.O. Otasowie ◽  
O. Evbomwan

This research is an investigation of the causes of call drops in a GSM network in Benin City, Nigeria. Call drop is inability of call to connect and go through the network successfully. For a drop call the subscriber does not enter into a queue for potential assignment. In this work, a drive test was conducted over a period of three months (March, April and May 2010) in cells around Benin City area. The drive test was conducted with the use of test mobile. A test mobile is a kit comprising mobile phone, drive testing proprietary software called TERMS on a laptop computer and GPS (global positioning system). A total of twenty seven cells out of forty cells around Benin City area were discovered to have severe call drops leading to very poor network performance. The problems that caused the call drops were determined and corrected leading to high improvement in call performance.


2021 ◽  
Vol 10 (4) ◽  
pp. 230
Author(s):  
Onel Pérez-Fernández ◽  
Juan Carlos García-Palomares

Moped-style scooters are one of the most popular systems of micro-mobility. They are undoubtedly good for the city, as they promote forms of environmentally-friendly mobility, in which flexibility helps prevent traffic build-up in the urban centers where they operate. However, their increasing numbers are also generating conflicts as a result of the bad behavior of users, their unwarranted use in public spaces, and above all their parking. This paper proposes a methodology for finding parking spaces for shared motorcycle services using Geographic information system (GIS) location-allocation models and Global Positioning System (GPS) data. We used the center of Madrid and data from the company Muving (one of the city’s main operators) for our case study. As well as finding the location of parking spaces for motorbikes, our analysis examines how the varying distribution of demand over the course of the day affects the demand allocated to parking spaces. The results demonstrate how reserving a relatively small number of parking spaces for scooters makes it possible to capture over 70% of journeys in the catchment area. The daily variations in the distribution of demand slightly reduce the efficiency of the network of parking spaces in the morning and increase it at night, when demand is strongly focused on the most central areas.


2020 ◽  
Vol 8 (1) ◽  
pp. 15
Author(s):  
Santoso B Widiarto ◽  
Iman Wahyudin ◽  
Hendrik Sombo ◽  
Ahmad S Muttaqin ◽  
Prehadi . ◽  
...  

Walking shark (Hemiscyllium freycineti) was classified in the Genus Hemiscyllium, a nocturnal organism, lives in benthic zone. Walking shark has limited distribution because of its inability to swim across the sea regardless the close range. Based on those information, the survey was conducted to monitor the potential density of walking shark populations at Misool, Raja Ampat, in order to have data of population and the utilization. This research was conducted by applying Snorkeling Visual Census Method along the coastline using Global Positioning System. A number of 58 individuals walking sharks was found during the survey and they varied from around 61-70 cm (the longest) to about 20 cm (the shortest). The most common size was of 31-40 cm. The length of the survey track was 20.003,74 m (20 km) and the observation area was 109.592,69 m2 with a survey track width of 11 m, so that the density of walking sharks was about 5,29 individuals/ha.Walking shark in Misool have not been used either for food consumption or in trade demand. It can be concluded, the level of density of walking sharks in Misool is under low pressure conditions.---Hiu berjalan (Hemiscyllium freycineti) tergolong dalam genus Hemiscyllium, yang merupakan hewan nokturnal yang hidup di dasar perairan. Hiu berjalan memiliki distribusi terbatas, karena jenis ini tidak mampu berenang menyeberangi laut yang dalam meskipun hanya berjarak beberapa kilometer. Berdasarkan informasi tersebut, maka dilakukan survei kepadatan populasi hiu berjalan di perairan Misool, Raja Ampat, guna memperoleh data populasi dan pemanfaatannya. Penelitian ini dilakukan dengan metode Snorkeling Visual Census dan survei menyusuri garis pantai berbasis Global Positioning System (GPS). Dari hasil survei, didapatkan jumlah ikan hiu berjalan yang tersensus sebanyak 58 individu dengan ukuran yang bervariasi dari terpanjang sekitar 61-70 cm dan ukuran terpendek 20 cm. Ukuran ikan hiu berjalan yang dominan ditemukan ialahdengan panjang tubuh 31-40 cm (sebanyak 16 individu). Survei ini mencakup panjang lintasan 20.003,74 m (20 km), luas area pengamatan 109.592,69 m2, dan lebar lintasan survei 11 m, sehingga kepadatan ikan hiu berjalan yang diperoleh dari hasil survei yaitu 5,29 individu/ha. Hiu berjalan di Misool belum banyak dimanfaatkan, baik secara konsumsi maupun permintaan perdagangan. Dengan demikian, dapat disimpulkan, bahwa tingkat kepadatan hiu berjalan di Misool dalam kondisi tekanan rendah.


Author(s):  
Prabha Ramasamy ◽  
Mohan Kabadi

Navigational service is one of the most essential dependency towards any transport system and at present, there are various revolutionary approaches that has contributed towards its improvement. This paper has reviewed the global positioning system (GPS) and computer vision based navigational system and found that there is a large gap between the actual demand of navigation and what currently exists. Therefore, the proposed study discusses about a novel framework of an autonomous navigation system that uses GPS as well as computer vision considering the case study of futuristic road traffic system. An analytical model is built up where the geo-referenced data from GPS is integrated with the signals captured from the visual sensors are considered to implement this concept. The simulated outcome of the study shows that proposed study offers enhanced accuracy as well as faster processing in contrast to existing approaches.


2014 ◽  
Vol 10 (11) ◽  
Author(s):  
Nizam Osman ◽  
Siti Zobidah Omar ◽  
Jusang Bolong ◽  
Jeffrey Lawrence DSilva ◽  
Hayrol Azril Mohamed Shaffril

Sign in / Sign up

Export Citation Format

Share Document