scholarly journals KMapper: A Field Geological Survey System

2021 ◽  
Vol 10 (6) ◽  
pp. 405
Author(s):  
Young-Kwang Yeon
Keyword(s):  
Field Work ◽  
Geological Survey ◽  
Smart Devices ◽  
Smart Sensors ◽  
Smart Device ◽  
Geological Surveys ◽  
Survey System ◽  
Geological Map ◽  
Geological Boundaries ◽  
Smart Mobile

The computing power of smart mobile devices has evolved as much as the power of desktop personal computers (PCs). Accordingly, a field geological survey system capable of utilizing the performance of smart devices is needed. Thus, the objective of this paper is to introduce a system with functions to take advantage of the performance of smart devices while meeting the various requirements of a geological survey. The system integrates geographic information system functions and smart sensors to execute field geological surveys effectively and can express various collections on a map. It also includes a map editing function that allows users to edit geological boundaries and areas on a map from the touch-based interface of a smart device. The records collected can be exported for editing of the geological map on a desktop PC. The developed app can replace traditional recording media used in field geological surveying and exploration work. It can be used to acquire location-referenced measurements with smart sensors, making field work more effective.

Distributed Control System for Turbine Engines

1998 ◽  
Author(s):  
Phillip L. Shaffer
Keyword(s):  
Control System ◽  
Distributed Control ◽  
Digital Data ◽  
Smart Devices ◽  
Smart Sensors ◽  
Smart Device ◽  
Central Control ◽  
Distributed Control System ◽  
Smart Actuators ◽  
Control Computer

A Distributed Control System (DCS) for a turbine engine has been demonstrated and tested, consisting of prototype Electronic Interface Units (EIUs) connected to data and power busses. In the DCS, a central control computer communicated with smart sensors and smart actuators via a 2.5 megabit/sec digital data bus, using the Fieldbus protocol. Power was distributed to the smart devices as 100-kHz 100V peak AC, allowing light, simple power converters at each smart device. All smart sensors, smart actuators and cables were dual-redundant. The smart actuators received position demand from the central control computer, exchanged data between channels to provide local redundancy management, closed the position loop locally, and reported actuator position to the central controller. Smart sensors converted sensed signals to digital values in engineering units, and performed local built-in tests. Testing of the DCS was done in a closed-loop simulation with an engine model. Frequency response of the DCS was almost identical with the conventional system.

Distributed Control System for Turbine Engines

1999 ◽  
Vol 121 (1) ◽  
pp. 102-107 ◽  
Author(s):  
P. L. Shaffer
Keyword(s):  
Control System ◽  
Distributed Control ◽  
Digital Data ◽  
Smart Devices ◽  
Smart Sensors ◽  
Smart Device ◽  
Central Control ◽  
Distributed Control System ◽  
Smart Actuators ◽  
Control Computer

A distributed control system (DCS) for a turbine engine has been demonstrated and tested, consisting of prototype electronic interface units (EIUs) connected to data and power busses. In the DCS, a central control computer communicated with smart sensors and smart actuators via a 2.5 megabit/sec digital data bus, using the Fields protocol. Power was distributed to the smart devices as 100 kHz 100V peak AC, allowing light, simple power converters at each smart device. All smart sensors, smart actuators, and cables were dual redundant. The smart actuators received position demand from the central control computer, exchanged data between channels to provide local redundancy management, closed the position loop locally, and reported actuator position to the central controller. Smart sensors converted sensed signals to digital values in engineering units, and performed local built-in tests. Testing of the DCS was done in a closed-loop simulation with an engine model. Frequency response of the DCS was almost identical with the conventional system.

Richard Dixon Oldham, 1858-1936

1936 ◽  
Vol 2 (5) ◽  
pp. 111-113
Keyword(s):  
Trinity College ◽  
Field Work ◽  
Geological Survey ◽  
Careful Study ◽  
Trinity College Dublin ◽  
Geological Surveys ◽  
Assistant Superintendent

Mr. R. D. Oldham, who died on 15 July, was the son of Dr. Thomas Oldham (1816-78), in succession professor of geology at Trinity College, Dublin, and director of the Geological Surveys of Ireland and India. Towards the close of his life in India, Thomas Oldham became interested in the earthquakes of that country. He made a careful study of the Cachar earthquake of 1869 on the lines laid down by Robert Mallet. The materials collected by him were brought to England on his retirement from the Survey in 1876, but ill-health prevented the completion of his report, and the notes were returned to India. His valuable “Catalogue of Indian Earthquakes from the Earliest Time to the End of a .d . 1869 ” was also published after his death ( India Geol. Surv. Mem., vol. 19, pt. 1, pp. 1—88 (1882) ; vol. 19, pt. 3, pp. 1—53 (1883) ). Richard Dixon Oldham was born on 31 July, 1858, and was educated at Rugby and the Royal School of Mines. He joined the staff of the Geological Survey of India as assistant-superintendent in 1879, and soon afterwards was dispatched for field-work to the Himalayan district. One of his earliest tasks, however, was the completion, of his father’s memoir on the Cachar earthquake, more than half of which, including the entire discussion of the observations, is due to him. Probably, also, he was responsible for the editing of the catalogue of Indian earthquakes.

The First National Geological Survey

1950 ◽  
Vol 87 (5) ◽  
pp. 373-382 ◽  
Author(s):  
V. A. Eyles
Keyword(s):  
Great Britain ◽  
National Survey ◽  
Field Work ◽  
Public Works ◽  
Geological Survey ◽  
Detailed Survey ◽  
Geological Map ◽  
Government Institution

AbstractIn France a National Geological Survey was planned in 1822 by the Corps Royal des Mines, a government institution, in association with its subsidiary, the Ecole des Mines. The first objective was a rapid Survey of the whole of France, with the intention of preparing a general Geological Map of the country, to be followed by a more detailed Survey, based on the Départements. Field work for the general map commenced in 1825, and was completed in 1835 and a Geological Map of the whole of France, on a scale of approximately 8 miles to the inch was published by the Ministry of Public Works in 1841. The project was carried out entirely under the direction of the Ministry, at public expense. As a National Survey it thus preceded that of Great Britain, established in 1835, by some ten years.

scholarly journals Géologie de la région située entre Tigssaluk fjord et Sermiligârssuk fjord (partie médiane), SW-Groenland

1964 ◽  
Vol 40 ◽  
pp. 1-146
Author(s):  
M Weidmann
Keyword(s):  
Field Work ◽  
Geological Mapping ◽  
Geological Survey ◽  
Entire Region ◽  
Geological Map ◽  
Mountain Chain ◽  
The University ◽  
Made In

The investigations, the results of which are described in the present work, were conducted during two distinct stages, from 1957 to 1960: 1) the field work, including the drawing of the geological map at a scale of 1:20000 and the collecting of numerous samples; this was made possible by the organization and facilities put at our disposal by the Geological Survey of Greenland, 2) the examination of the collected material, which was conducted in the laboratories of geology and petrography of the University of Lausanne. The area which we have studied is composed of an ensemble of gneiss, schists, dykes and massifs of various age and composition; it is situated in the SW part of Greenland, about 30 km NNW of Ivigtut (Fig. 1 and Plate 1). The limits of this territory are the following: to the N, Sermiligârssuk fjord and the glacier of Sioralik; to the E, a depressed zone occupied by lakes; to the S, Tigssaluk fjord and a faultzone oriented approximately E-W; lastly, to the W, an ideal N-S line which marks the western limit of the maps at al: 20000 scale of the Geodætisk Institut that we used for the geological map. No geological investigations had been conducted in the area; the only published information concerns the region as a whole, and is to be found in the works of N.V. Ussing (1912), C.E. Wegmann (1938 and 1947), J. Bondam (1956) and A. Berthelsen (1960 and 1961). Let us also mention the unpublished reports of our companions, the geologists of the Geological Survey of Greenland. Apart from a few small zones which were examined in detail, the geological mapping of the region was conducted in an exploratory manner with a view to establishing rather a chronology as precise as possible than a detailed map at a 1:20000 scale. The chronology, the main lines of which we are now going to put forward, represents an attempt at a synthesis based on observations made in our territory as well as in the entire region of Ivigtut; here we have the opportunity of seeing the deep zones of a mountain chain in which are visible traces of all the phenomena which follow each other during the evolution of a "drame-type", such as H. and G. Termier (1956), for example, have described it.

scholarly journals Update of the seamless 1:500 000 scale geological map of Greenland based on recent field work in the Wandel Sea Basin, eastern North Greenland

2018 ◽  
pp. 39-42
Author(s):  
Kristian Svennevig
Keyword(s):  
Basic Research ◽  
Field Work ◽  
The Arctic ◽  
Digital Map ◽  
The Past ◽  
Geological Surveys ◽  
Current State ◽  
Geological Maps ◽  
Geological Map ◽  
North Greenland

Geological maps are core products of national geological surveys and represent the sum of geological knowledge of any given area. However, dedicated and extensive mapping projects in the Arctic are mostly a thing of the past due to difficulty in financing such costly basic research efforts. Today, an overview of the geology of Greenland is portrayed by a seamless digital 1:500 000 scale geological map (Kokfelt et al. 2013; Pedersen et al. 2013), based on printed maps on this scale produced since 1982 by the Geological Survey of Denmark and Greenland (GEUS; see Holst et al. 2013). The digital map now makes it possible to update smaller areas with new, published or otherwise quality-controlled geological data (e.g. Kolb et al. 2016). This ensures that the map reflects the current state of geological knowledge without undertaking extensive new mapping to update individual map sheets, as has previously been the modus operandi. An online version of the map is available from www.greenmin.dk/map. However, procedures are required to ensure that updates are carried out routinely and that the quality and coherence of the updated map is of the Survey’s standards. Results of recent field work in the Wandel Sea Basin (Fig. 1) and in particular the publication of a new geological map sheet Kilen on a scale of 1:100 000 (Svennevig in press) have implications for the geology shown on the above mentioned 1:500 000 scale seamless geological map of Greenland. The post-Devonian part of this map in eastern North Greenland has been updated according to the results of studies published since the publication of the original printed maps (Bengaard & Henriksen 1986; Jepsen 2000). The changes do not call for an update of the 1:2 500 000 scale geological map of Greenland (Henriksen et al. 2009).

Finally Persuaded: The Creation of the 1889 Geological Survey of Kansas

1984 ◽  
Vol 3 (2) ◽  
pp. 112-116 ◽  
Author(s):  
Rex Buchanan
Keyword(s):  
Field Work ◽  
The State ◽  
Geological Survey ◽  
University Of Kansas ◽  
Paper Briefly ◽  
State College ◽  
Geological Surveys ◽  
Kansas State College ◽  
The Creation ◽  
The University

While much has been written about the State's first two geological surveys in 1864 and 1865, much less information is available concerning the establishment of the current incarnation of the Geological Survey at the University of Kansas in 1889. This paper briefly traces the events leading to the Survey's recreation: legislative attempts at a survey in the 1880's, arguments made for and against a survey, and the circumstances leading to the Survey's placement at KU. The Kansas Academy of Science particularly was active in the battle for a survey, and appealed to State pride and practical benefits as reasons for a survey's creation. The Academy finally succeeded in 1889, probably in part because of a burgeoning minerals industry in the State. In addition, a change in the KU budget allowed the Legislature to establish the Survey at KU without appropriating additional funds for its operation. No appropriation was made for the Survey from 1889 to 1895, although some field work was undertaken. This paper also explores several reasons that the Survey was placed at KU rather than Kansas State College.

Upernavik 98: reconnaissance mineral exploration in North-West Greenland

1999 ◽  
pp. 39-45 ◽  
Author(s):  
Bjørn Thomassen ◽  
Johannes Kyed ◽  
Agnete Steenfelt ◽  
Tapani Tukiainen
Keyword(s):  
Mineral Exploration ◽  
Mining Industry ◽  
Field Work ◽  
Geological Survey ◽  
Original Series ◽  
West Greenland ◽  
North West ◽  
One Year

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Thomassen, B., Kyed, J., Steenfelt, A., & Tukiainen, T. (1999). Upernavik 98: reconnaissance mineral exploration in North-West Greenland. Geology of Greenland Survey Bulletin, 183, 39-45. https://doi.org/10.34194/ggub.v183.5203 _______________ The Upernavik 98 project is a one-year project aimed at the acquisition of information on mineral occurrences and potential in North-West Greenland between Upernavik and Kap Seddon, i.e. from 72°30′ to 75°30′N (Fig. 1A). A similar project, Karrat 97, was carried out in 1997 in the Uummannaq region 70°30′–72°30′N (Steenfelt et al. 1998a). Both are joint projects between the Geological Survey of Denmark and Greenland (GEUS) and the Bureau of Minerals and Petroleum (BMP), Government of Greenland, and wholly funded by the latter. The main purpose of the projects is to attract the interest of the mining industry. The field work comprised systematic drainage sampling, reconnaissance mineral exploration and spectroradiometric measurements of rock surfaces.

Metasedimentary rocks, intrusions and deformation history in the south-east part of the c. 1800 Ma Ketilidian orogen, South Greenland: Project SUPRASYD 1996

1997 ◽  
pp. 60-65
Author(s):  
Adam A. Garde ◽  
Brian Chadwick ◽  
John Grocott ◽  
Cees Swager
Keyword(s):  
Field Work ◽  
Deformation History ◽  
The South ◽  
Present Contribution ◽  
East Part ◽  
Metasedimentary Rocks ◽  
Deformational History ◽  
Base Camp ◽  
History Of ◽  
Geological Map

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Garde, A. A., Chadwick, B., Grocott, J., & Swager, C. (1997). Metasedimentary rocks, intrusions and deformation history in the south-east part of the c. 1800 Ma Ketilidian orogen, South Greenland: Project SUPRASYD 1996. Geology of Greenland Survey Bulletin, 176, 60-65. https://doi.org/10.34194/ggub.v176.5063 _______________ The south-east part of the c. 1800 Ma Ketilidian orogen in South Greenland (Allaart, 1976) is dominated by strongly deformed and variably migmatised metasedimentary rocks known as the ‘Psammite and Pelite Zones’ (Chadwick & Garde, 1996); the sediments were mainly derived from the evolving Julianehåb batholith which dominates the central part of the orogen. The main purpose of the present contribution is to outline the deformational history of the Psammite Zone in the region between Lindenow Fjord and Kangerluluk (Fig. 2), investigated in 1994 and 1996 as part of the SUPRASYD project (Garde & Schønwandt, 1995 and references therein; Chadwick et al., in press). The Lindenow Fjord region has high alpine relief and extensive ice and glacier cover, and the fjords are regularly blocked by sea ice. Early studies of this part of the orogen were by boat reconnaissance (Andrews et al., 1971, 1973); extensive helicopter support in the summers of 1992 and 1994 made access to the inner fjord regions and nunataks possible for the first time.A preliminary geological map covering part of the area between Lindenow Fjord and Kangerluluk was published by Swager et al. (1995). Hamilton et al. (1996) have addressed the timing of sedimentation and deformation in the Psammite Zone by means of precise zircon U-Pb geochronology. However, major problems regarding the correlation of individual deformational events and their relationship with the evolution of the Julianehåb batholith were not resolved until the field work in 1996. The SUPRASYD field party in 1996 (Fig. 1) was based at the telestation of Prins Christian Sund some 50 km south of the working area (Fig. 2). In addition to base camp personnel, helicopter crew and the four authors, the party consisted of five geologists and M.Sc. students studying mafic igneous rocks and their mineralisation in selected areas (Stendal et al., 1997), and a geologist investigating rust zones and areas with known gold anomalies.

scholarly journals Latency-Optimal Computational Offloading Strategy for Sensitive Tasks in Smart Homes

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2347
Author(s):  
Yanyan Wang ◽  
Lin Wang ◽  
Ruijuan Zheng ◽  
Xuhui Zhao ◽  
Muhua Liu
Keyword(s):  
Queue Length ◽  
Optimization Problem ◽  
Time Slot ◽  
Smart Homes ◽  
Back Pressure ◽  
Smart Devices ◽  
Smart Device ◽  
Simulation Results ◽  
Computational Offloading ◽  
The Stability

In smart homes, the computational offloading technology of edge cloud computing (ECC) can effectively deal with the large amount of computation generated by smart devices. In this paper, we propose a computational offloading strategy for minimizing delay based on the back-pressure algorithm (BMDCO) to get the offloading decision and the number of tasks that can be offloaded. Specifically, we first construct a system with multiple local smart device task queues and multiple edge processor task queues. Then, we formulate an offloading strategy to minimize the queue length of tasks in each time slot by minimizing the Lyapunov drift optimization problem, so as to realize the stability of queues and improve the offloading performance. In addition, we give a theoretical analysis on the stability of the BMDCO algorithm by deducing the upper bound of all queues in this system. The simulation results show the stability of the proposed algorithm, and demonstrate that the BMDCO algorithm is superior to other alternatives. Compared with other algorithms, this algorithm can effectively reduce the computation delay.

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