bluuebunny/crossref_metadata_2025 huggingface dataset:
Géologie d'un secteur situé entre les fjords de Sermiligârssuk et Arsuk, (SW du Groenland)
Authors: Bonnard L
Published: June 2021

South-west Greenland belongs to the Precambrian shield; it is buiIt up of metamorphic, eruptive and, to a lesser extent, sedimentary rocks. The chronology of these formations and their structural relations are now fairly well established and are referred to three periods - pre-Ketilidian, Ketilidian and Gardar. Important unconformities separate the rocks of these divisions at the type localities. The greater part of the rocks occurring in the region mapped by the author belong to the pre-Ketilidian; these are migmatites - quantitatively the most important, ultramafic rocks, and metadolerites in various stages of alteration. The Ketilidian period was marked by local tectonic movements, metamorphism and the intrusion of small granitic bodies; the Ketilidian supracrustal succession lies immediately to the east of the area under consideration. The Gardar period has left its imprint in the form of widespread fractures and a dyke swarm composed mainly of dolerites and trachytes. The migmatites are predominantly gneisses, homogeneous and nebulitic in the north, banded and veined in the south. AlI the gneisses have a granodioritic or quartz-dioritic composition. Small masses of granite and sorne lenses of gabbro-anorthosite make up the remainder of the migmatite area, which structurally consists of a succession of domes and synclines with axes oriented in a general NW-SE direction with a culmination in the region of Dubletsø. The migmatite complex was probably derived from pelitic and arkosic sediments; it is the product of the metamorphism, migmatisation and intense deformation which marked the pre-Ketilidian. The ultrabasic bodies appear as small bodies within the migmatites: they are classified as steatites, serpentinites and actinolitites, the mutual relations of which form the subject of various hypotheses; it is probable that there exist two generations of ultrabasics separated by a phase of folding and migmatisation. The pre-Ketilidian metadolerites (like the later Gardar dykes) trend for the most part NE-SW. In the southern part of the area they are almost totally recrystallised due to later (presumably Ketilidian) metamorphism. The Ketilidian activity in the area was characterised by a metamorphism of variable intensity, most marked in the south-east of the area where it accompanied tectonic deformation. Dykes of microgranite and sorne small granitic and microdioritic bodies also belong to this period. The Gardar dyke complex comprises rare lamprophyres, trachytes and above all very numerous dolerites of which it is possible to distinguish several generations on the basis of intersections and microscopic characters. The fracturing and wrench-faulting described are also of Gardar age. FinalIy, within·the area many features of Quaternary and recent origin may be seen; these are the result of glaciation and the present arctic conditions.
Notes on the Precambrian to Lower Cambrian stratigraphy of the south-eastern part of Heilprin Land, Independence Fjord, North Greenland
Authors: Jepsen H.F
Published: June 2021

As a member of the 7th Danish Peary Land Expedition in the summer of 1970 led by Count Eigil Knuth, the author had the opportunity to study a section through the Precambrian, Eocambrian and Lower Cambrian strata along the south-eastern shore of Heilprin Land (fig. 2). The main purpose was to examine the Precambrian Midsommersø dolerites (see below), and also to map the sedimentary formations of the area. This report describes the results of the mapping.
Continued investigations of Quaternary deposits in the area bounded by Søndre Strømfjord, the Inland Ice, and the Sukkertoppen Ice Cap
Authors: TenBrink N.W
Published: June 2021

The 1970 project was a continuation of more general 1969 investigations, some results and the objectives of which were reported by Weidick & Ten Brink (1969). The objectives of 1970 field work were to: (1) accurately determine altitudes and characteristics of marine limits; (2) complete a collection of marine shells and organic material from emerged marine deposits in order to derive a radiocarbon-dated delevelling history; (3) obtain cores of sediments from at least three lakes for pollen analysis and C-14 dating of lake-sea isolation times; (4) map in detail some glacial, glaciofluvial, and marine deposits known from 1969 investigations to be particularly important in reconstruction of Holocene events, and (5) conduct a lichenometric survey on young moraines near the lnland lce in order to estimate ages of the moraines. All the field objectives were achieved, and the results that can be stated before completion of analyses are summarised below.
Field mapping in the Scoresby Sund region, East Greenland
Authors: Henriksen N
Published: June 2021

The third season, 1970, of the five year mapping programme in the Scoresby Sund area lasted slightly more than two months. As in the previous years the expedition was based on a special polar vessel which carried two Bell helicopters. The ship used was the 2675 ton "Perla Dan", which with a crew of 25 supported 3 smaller boats. The expedition members numbered 43, comprising 16 geological two- or three-man teams, and supporting personnel. The geological teams were divided into several working groups. Eight two-man parties worked in the crystalline complex in the inner fjord region around Rødefjord and on Milne Land. One party mapped the upper Palaeozoic sediments at Rødefjord. Five parties mapped the Mesozoic rocks on Milne Land and on south-eastern Jameson Land (see Birkelund, this report); three of these parties, in addition to mapping, undertook special palaeontological investigations along the west coast of Rurry Inlet and were financiaIly supported by the Carlsberg Foundation. One party worked in the Tertiary basalt on southeastern Milne Land and north-west Gåseland, and one party undertook a Quaternary geological investigation in the central part of the inner fjord zone.
Routine K/Ar age determinations on rocks from Greenland carried out for GGU in 1970
Authors: Bridgwater D
Published: June 2021

The programme of commercial age determinations started in 1969 (Bridgwater, 1970) was continued to supplement the work carried out by the University of Copenhagen (Larsen, this report). The material dated represents a rather heterogeneous collection of rocks from many parts of Greenland about which information was required for current geological work but which were not included in existing age determination projects. All the results obtained are listed whether or not the "ages", have a clear geological significance, since a major reason for carrying out this form of reconnaissance survey is to test the suitability of K/Ar methods for making more detailed studies. Full analytical data is available on request from GGU. Unless otherwise stated the results given are means of three determinations.
A new station for ground temperature measurements at Christianshåb, central West Greenland
Authors: Olesen O.B
Published: June 2021

In July a further station for ground temperature measurements was established at Christianshåb. This station is the eighth erected in West Greenland as part of the Danish contribution to the UNESCO International Hydrological Decade programme (IHD). The first station was set up at Holsteinsborg in 1964, followed by a second there in 1967, two in Søndre Strømfjord in 1967, and single stations at Jakobshavn 1968, Godhavn 1968 and Egedesminde 1970. Apart from one station in Søndre Strømfjord which was closed in the autumn of 1970, all are in operation.
Aeroradiometric surveying in the Scoresby Sund region, East Greenland
Authors: Nielsen B.L
Published: June 2021

Independent of the main East Greenland mapping project (see Henrik:sen, this report), an aeroradiometric survey was carried out in the Scoresby Sund region in July. Three areas were surveyed in detail: (a) the eastem part of Milne Land, (b) the southern part of Liverpool Land, east of Hurry Inlet and (c) west of the Schuchert Dal between Bjørnbo Gletscher and Ivar Baardsøn Gletscher. Furthemore, several reconnaissance flights were made over Jameson Land, in the Mestersvig area and to the north of Mestersvig as far as Loch Fyne.
Rb/Sr whole rock and U/Pb zircon age studies on granites of the Early Proterozoic mobile belt of South Greenland
Authors: Van Breemen O , Allaart J.H , Aftalion M
Published: June 2021

In 1969 the Scottish Research Reactor Centre and GGU started a joint project on age dating work in the Early Proterozoic mobile belt of South Greenland (Ellitsgaard-Rasmussen, 1970, p. 8). During that summer 85 samples of two early orogenic and four late to post-orogenic granites, including rapakivi granite, were collected around Julianehåb and in the Tasermiut area in western South Greenland. Since then, Rb/Sr isotope dilution analyses have been carried out on 31 whole rock specimens (3 in duplicate) and 3 minerals of five granites, and U/Pb isotope dilution analyses on 9 zircon size fractions (1 in duplicate) of four granites. Main sample localities are indicated in fig. 6 and approximate coordinates in tables 1 and 2.
Autochthonous granodiorites north-west of Frederikshåbs Isblink, Fiskenæsset region
Authors: Hopgood A.M
Published: June 2021

The gneiss complex immediately north-west of Frederikshåbs Isblink is composed mostly of amphibolite facies, grey, streaky, quartzo-feldspathic, biotite and hornblende gneisses. Subordinate amphibolites, homblendites, thin anorthosites, peridotite lenses up to 200 m across, rare concordant marble bands and associated calc-silicate gneisses and kyanite and sillimanite gneisses make up the bulk of the remainder, and the whole has been complexly deformed. Occupying the higher ground within the complex, and comprising the largest single lithological unit there is a considerable volume of massive weathering, porphyroblastic granodiorite and granodiorite gneiss. Field relationships show this to be unquestionably autochthonous and almost certainly of palingenetic origin and while on a small scale the 'contact' with the surrounding gneisses may be locally discordant, overall it follows closely the large scale structure and this suggests its control by preexisting lithology.
A survey of the economic geology of Greenland (exclusive fossil fuels)
Authors: Nielsen B.L
Published: June 2021

A short summary of the major geological divisions in Greenland and the mineralizations within each region is presented. Each economically important element is treated separately.
Late Silurian and early Devonian graptolites from North Greenland
Authors: Berry W.B.N , Boucot A.J , Dawes P.R , Peel J.S
Published: June 2021

The precise age of the youngest part of the geosynclinal fill of the North Greenland fold belt has been the subject of important discussion, particularly with regard to the problem of dating the Palaeozoic diastrophism (Kerr, 1967; Dawes, 1971). Since Lauge Koch's field work between 1916 and 1923 it has been known that strata bearing Monograptus priodon were involved in the folding (Koch, 1920), indicating the presence of Silurian of Llandovery-Wenlock age. In addition, Poulsen (1934) identified Cyrtograptus cf. C. multiramus and Monograptus bohemicus in collections made by Koch from unfolded shales on the platform, to the south of the fold belt, which demonstrated that the section included Wenlock and early Ludlow strata.
A pillowed sill from the Atanikerdluk area, Nûgssuaq
Authors: Pedersen A.K
Published: June 2021

The geology of the Atanikerdluk area, along the south coast of Nugssuaq, has been described in considerable detail by Koch (1955; 1959) and Koch & K. R. Pedersen (1960). In a sequence of Lower Tertiary black carbonaceous shales - the Aussivik: Member of the Upper Atanikerdluk Formation (Koch, 1959) - there are a number of horizontal basaltic layers. Beeause of the apparent laek of eontaet metamorphism it was with some hesitation that Koch (1955, pp. 34-35) originally regarded the layers as sills. Later these layers were regarded, although with hesitation, as a sequenee of lavas, representing the first subaeriallavas to flow into the Atanikerdluk area (Koch, 1959; Koch & K. R. Pedersen, 1960).
Beatricea from the Ordovician of Hall Land, North Greenland
Authors: Peel J.S
Published: June 2021

Large, somewhat irregular cylinders of the supposed stromatoporoid genus Beatricea Billings, 1857, have frequently been reported from Ordovician strata. Sokolov (1962) noted the occurrence of 14 species from the Ura1s, Siberia, Novaya Zemlya and North America, in addition to representatives of the closely related genera Aulacera Plummer, 1843 and Cryptophragmus Raymond, 1914. Although diverse Ordovician faunas were described from Greenland by Troedsson (1928), Poulsen (1927) and Teichert (1937), no record has previously been made of these genera in Greenland. It is therefore of some interest that specimens of Beatricea have now been identified in collections made by J. H. Allaart and P. R. Dawes in 1965 during 'Operation Grant Land' from Kap Ammen, on the northern coast of Hall Land, North GreenIand.
Environmental survey in relation to mining operations at Mârmorilik, Umanak district, central West Greenland
Authors: Asmund G
Published: June 2021

The mining company Greenex A/S has been engaged in miningoperations at Mârmorlik since August 1973. Since then tailings from the flotation plant have been dumped into the fjord Agfardlikavsa. The environmental inpact of the approximate 450 000 tons per year of waste containing lead and zinc has been investigated during complete ice cover in February 1974 and during an open water situation in September 1974. In cooperation with Grønlands Fiskeriundersøgelser samples of the fauna of the bottom sediments and of sea water were collected on both occasions. Seaweed and mussels were also collected in September. The chemical analyses were undertaken by GGU and the Institute for Petrology, University of Copenhagen. The study represents the continuation of an earlier project in the same region (Bondam & Asmund, 1974). A map of the Mârmorilik area showing details of bathymetry and sample localities was presented by these authors.
New investigations of the native iron bearing volcanic rocks of Disko, central West Greenland
Authors: Pedersen A.K
Published: June 2021

A reinvestigation of the native iron bearing rocks of northern Disko has been initiated as a follow up of new regional mapping. A variety of hypotheses as to formation have been put forward since the work of Steenstrup (1882a); a bibliography is given by Bøggild (1953) and a recent review by Pauly (1969). In addition to examination of the nature of the deposits as such, the purpose of the new investigations is twofold. (1) To map the native iron bearing volcanic rocks which ean be used as stratigraphical marker horizons. (2) To investigate the possibie economic potential of segregations of native iron and sulphides found in these rocks.
High temperature pyrrhotite and telluric iron mineralisations in western Disko, central West Greenland
Authors: Ulff-Møller F
Published: June 2021

The main purpose of the summer field work was to carry out a detailed investigation of the high temperature niekeliferous pyrrhotite and tellurie iron mineralisation whieh oeeurs in the subvolcanie intrusions of the Hammers Dal Complex (Pedersen, this report, and in press), and to seareh for other occurrenees with an econornic evaluation in view. The dyke-like intrusions are mainly found in gorges in the south facing slope of the E-W trending Hammers Dal, about 10 km from the west coast of Disko. They are exposed only in the upper 400 m of the Rinks Dal Member. The depth of the intrusions was thus 400-500 m below the palaeosurfaee, marked by the weakly eontaminated basalts and more strongly eontaminated 'andesites' of the Niaqussat Member which are considered to be the extrusive equivalents of the intrusions. The magma seems to have intruded along a joint zone dipping about 70° WSW forming pipes or dyke-like bodies plunging gently NNW.
Field mapping of Bjørneøen and the adjacent coast of Nordlandet, Godthåbsfjord, southern West Greenland
Authors: James P.R
Published: June 2021

Mapping at a scale of 1:50 000 was carried out on the gneisses and supracrustals of Bjørneøen and the granulites of the adjacent east coast of Nordlandet; the area has previously been described by Noe-Nygaard & Ramberg (1961) and Bridgwater & McGregor (1974). During the present study special emphasis was placed on the structural relationships of the various rock units and also on the relationship and contact between the amphibolite facies and granulite facies areas. A short excursion was made at the beginning of the field season around Godthåbsfjord and Arneralik with the helpful guidance of V. R. McGregor whose kind assistance is especially acknowledged.
Environmental, geochemical and ecological studies in the region around the Ilímaussaq alkaline intrusion, South Greenland
Authors: Nielsen C.O , Rose-Hansen J , Sørensen H
Published: June 2021

This work was undertaken jointly by GGU and the Danish Natural Science Research Foundation (SNF) and was a continuation ofthe 'Narssaq project', initiated in 1974 (Bohse et al.,1975). In 1975, G. Asmund of GGU and the folIowing members of the University of Copenhagen, took part in the investigations: N. Christensen, J. Feilberg, R. Gwozdz, M. M. Hansen, J. Jørgensen, C. L. Larsen, K. Lindegaard-Petersen, P: Mæhl, B. Nielsen, C. O.Nielsen; D. Olsen, H. Sørensen, P. Willumsen and the present compiler. The main aim of the project is to compare the exogeneous, geochemical and ecological environments invarious areas withinthe Ilimaussaq alkaline intrusion with selected reference areas in the Julianehåb granite terrain outside the intrusion. There were five main studies in 1975 and these are briefly outlined below.
New instruments for geological photo-interpretation and mapping
Authors: Dueholm K.S
Published: June 2021

Aerial photography is now an integrated part of topographic mapping. Half a century ago photogrammetric methods revolutionised the production of topographic maps, mainly because all contour drawing and measuring of detaiIs were transferred from the field to the laboratory. Based on very few field observations, a detailed and very accurate topographic map can be drawn from aerial photographs by photogrammetric methods. Thus, for an area that would require many weeks of fieldwork to produce a satisfactory topographic map, the same result can be achieved in the photogrammetric laboratory in a single day. In addition, accuracy can be very high. For instance, for a map at the scaie 1:50000 an accuracy on the ground better than 0.5 m can be reached by photogrammetric methods.
Reconnaissance work in the Triassic of the Wandel Sea Basin, eastern North Greenland
Authors: Håkansson E , Heinberg C
Published: June 2021

The North-eastern part is one of the geologically least known areas in Greenland and although late Palaeozoic, Mesozoic and Tertiary strata are known to comprise the Wandel Sea basin, litlIe stratigraphical and structural detail is available (for summaries see Peel et al., 1974; Dawes, 1976). As a forerunner to GGU's forthcoming regional mapping project in northern Greenland, a reconnaissance tour to the Wandel Sea basin was attempted through the courtesy of the Royal Danish Air Force. However, due to partial failure in logistic support the field work was severely restricted and only part of the eastern Peary Land sequence was visited. Here only a single section was measured.
Field mapping in the Nagssugtoqidian of South-East Greenland
Authors: Bridgwater D , Davies F.B , Gill R.C.O , Gorman B.E , Henriksen N , Watterson J
Published: June 2021

The 1976 season's work was the first of a reconnaissance mapping programme between 62° 30'N (Tingmiarmiut) and 68° 00'N (Kangerdlugssuaq) as the first stage in producing 1:500000 map sheets of this part ofthe east coast. The work was carried out by a team of six geologists, one geophysicist (G. E. J. Beckmann, see this report) and one field assistant (H. B. Nøhr Hansen) using 5 m inflatable boats from a 80 ton motor cutter (Tycho Brahe). Reconnaissance work was completed from Sermiligaq (64° 54'N) to inner Kangertigtivatsiaq (66° 28'N) (fig. 19). Approximately one week was spent in the region between Sermilik west of Angmagssalik and Sermiligaq to provide a link between the earlier reconnaissance work of Bridgwater & Gormsen (1968) and the Birmingham Vniversity teams who mapped in the Angmagssalik area between 1967 and 1970 (Wrightet al., 1973). North of 66°00'N in Sermilik and 66° 15'N on the outer coast work was prevented by ice which remained impassable until late August. A total of 35 days was available.
Silurian carbonate mounds in Peary Land, North Greenland
Authors: Lane P.D , Thomas A.T
Published: June 2021

Carbonate mounds are important features in the Silurian of North Greenland. They occur in an approximately west-east trending belt from Washington Land in the west to the Victoria Fjord area in the east- a distance ofsome 300 km (Dawes, 1971, 1976). Mounds in Peary Land, 250 km to the east of the Victoria Fjord area, are much less common than in western North Greenland. They are, as yet, not known in extreme eastern Peary Land or in Kronprins Christian Land (Christie & Peel, 1977).
Geophysical field work on selected aeromagnetic anomalies in central West Greenland
Authors: Thorning L , Jensen L.B , Marcussen C , Mielby B.S , Petersen S.A
Published: June 2021

During the airborne operations carried out in 1975 and 1976 (Thorning, 1976, 1977), limited field activity was undertaken on the ground, mainly with the purpose of obtaining measurements of magnetic susceptibility of rocks. In 1977 no airborne operations were carried out and the summer's field work was concentrated on ground surveys. As in previous years the base camp was at Søndre Strømfjord where also a continuous analog and digital recording magnetometer was functional during the summer. Three field teams were supported by boat and helicopter (fig. 14); L. B. J. and C. M. worked in three areas from field camps north of Søndre Strømfjord, mainly with the purpose of collecting orientated samples from rocks causing magnetic anomalies; B. S. M. and S. A. P.\worked from ca ps inland east of Sukkertoppen with a detailed survey of the Majorqaq anomaly; L.T. worked from the GGU cutter Kornerup in Nordre Strømfjord, from another boat on the east coast of Nordlandet north of Godthåb, and with helicopter south of Søndre Strømfjord and in the Holsteinsborg area studying the rocks and structures causing the magnetic anomalies and obtaining values of the magnetic parameters of these rocks.
Late Archaean metamorphic Rb-Sr isochron ages from basic and ultrabasic rocks in the Bjørnesund – Ravns Storø region, southern West Greenland
Authors: Burwell A.D.M , Friend C.R.L , Hughes D.J
Published: June 2021

The Archaean complex of South-West Greenland (Bridgwater et al., 1976) consists largely of polyphase quartzo-feldspathic gneisses which intrude horizons of amphibolite and anorthosite with genetically and spatially associated ultramafic rocks and minor occurrences of meta-sedimentary material. In the Bjørnesund - Ravns Storø region (fig. 46) 150 km south of Godthåb the amphibolite units are structurally linked together and are considered to represent the same unit (Friend, 1975). The complex was variably metamorphosed to hornblende-granulite or amphibolite-facies conditions. This metamorphism accompanied three main phases of deformation within the region (Kalsbeek & Myers, 1973) and post-dated the formation of the precursors of the amphibolites.
Review of the Survey's activities in 1978
Authors: Ellitsgaard-Rasmussen K
Published: June 2021

The main field activity of the Survey in 1978 was a study of the geology of North Greenland (fig. 1). This was the first summer of a three year project which aims at a geological synthesis of the whole region together with the compilation of two 1:500000 geological maps. Significant additions to the geological knowledge of the area included the discovery ol an extensive Proterozoic basalt province, an extension of the known distribution of the late Proterozoic to Silurian strata, and of the late Palaeozoic to Tertiary Mesozoic sequences of the Wandel Sea Basin. The field work has been undertaken in cooperation with the Geodetic Institute, establishing a set of ground central points for the preparation of topographic maps of northern Greenland. These maps will be based on a new set of aerial photographs which were taken during the summer. The Danish Air Force using a Hercules aircraft flew in the group of 32 geologists and surveyors and their equipment to Station Nord. Geological studies and surveying went according to plan, in spite of more snow cover than usual in most of Peary Land.
International field work on Archaean gneisses in the Godthåbsfjord-Isua area, southern West Greenland
Authors: Bridgwater D , Allaart J.H , Baadsgaard H , Collerson K.D , Ermanovics I , Gorman B.E , Griffin W , Hanson G , McGregor V.R , Moorbath S , Nutman A.P , Taylor P , Tveten E , Watson J
Published: June 2021

Geoscientists representing the main research institutes who discovered and have made significant contributions to our understanding of the early crustal rocks in the North Atlantic area visited West Greenland in June 1978. The group was partially financed by Nato scientific research grant 949 and by national research organisations, universities and geological surveys in Denmark, Norway, the United Kingdom, Canada and the USA. Bridgwater, Taylor and Moorbath stayed on into July at Isua where they joined a party financed by the U.S. S.N.F. organised by C. Ponnamperuma (University of Maryland).
Mapping of Tertiary basalts on the northern Blosseville Kyst, East Greenland
Authors: Watt W.S , Watt M
Published: June 2021

During the 1978 season work carried out by a helicopter-supported field team was concentrated in the region around Kap Dalton and Stenos Gletscher. The work formed a continuation of that carried out in 1975 in the coastal region between Kap Dalton and Steward Ø. The main objectives were to link the stratigraphic sequence of the coastal region to that established for the Scoresby Sund area to the north and north-west. For this it was essential to gain a detailed knowledge of the inland behaviour of the coastal fault system.
Boundary relationships between pre-Caledonian and Caledonian lithostructural units in the East Greenland Caledonides 72°-74°N
Authors: Higgins A.K , Friderichsen J.D
Published: June 2021

In 1978 a further season of geological reconnaissance work was carried out in the inner fjord region of East Greenland between latitudes 72°-74°N. This work set out to establish a modem updated framework for the classic geological studies carried out by Lauge Koch's expedition (Haller, 1971; Koch & Haller, 1971) and was an extension of the Survey's work in the Scoresby Sund region between 1968 and 1972. New field work by the writers and others, supported by radiometric age determinations, has already contributed much new data (Rex et al., 1976, 1977; Higgins et al., 1978; Thyrsted, 1978). In 1978 several important localities were revisited, and 1:20 000 mapping undertaken in key areas south of Nunatakgletscher, in Knækdalen, around Kap Hediund and in Forsblads Fjord (fig. 29).
Systematic geological mapping in 1979 in the Peary Land region, North Greenland. General introduction to the present collection of papers
Authors: Henriksen N
Published: June 2021

The second season of a three year systematic field mapping programme in the Peary Land region, north of c. lat. 81°N and east of c. 40°W, was carried out in June-August 1979. The aim of the programme is to produce a 1:500 000 map sheet of eastern North Greenland and to investigate the geological framework of the region.
SIZING OPTIMIZATION OF A PHOTOVOLTAIC/BATTERY SYSTEM BASED ON ANALYSIS OF THE ANNUAL TOTAL SOLAR RADIATION IN THE NORTH OF VIETNAM
Authors: Thu Nguyễn Thị Hoài
Published: June 2021

Bài báo này đưa ra 1 phương pháp để xác định dung lượng tối ưu của hệ thống pin mặt trời kết hợp ắc quy cung cấp điện cho 4 loại tải hộ gia đình và văn phòng ở khu vực miền Bắc Việt Nam. Bài toán được xây dựng với hàm mục tiêu là tối thiểu chi phí tính toán hàng năm (LCE) và ràng buộc về độ phụ thuộc vào lưới (GD) theo yêu cầu cho trước. Thông thường GD phụ thuộc vào chuỗi số liệu thời tiết của bức xạ mặt trời. Tuy nhiên nghiên cứu này đã xây dựng công thức ước lượng GD là hàm số của tổng lượng bức xạ hàng năm, dung lượng của battery và PV sử dụng số liệu thời tiết trong 15 năm của 7 tỉnh miền Bắc Việt Nam. Từ đó có thể sử dụng phương pháp lặp để tìm cấu hình tối ưu của hệ thống tương ứng với GD yêu cầu một cách đơn giản. Ngoài ra, nghiên cứu cũng tiến hành phân tích độ nhạy khi chi phí của hệ thống pin mặt trời và ắc quy thay đổi. Các kết quả tính toán cho thấy phương pháp đề xuất có độ chính xác cao và có khả năng áp dụng với những khu vực khác ở miền Bắc khi không có số liệu thời tiết đầy đủ.
ĐÁNH GIÁ THỰC TRẠNG SÓNG HÀI TẠI MỘT SỐ PHỤ TẢI Ở VIỆT NAM VÀ ĐỀ XUẤT GIẢI PHÁP KHẮC PHỤC
Authors: Tuấn Bùi Anh
Published: June 2021

Bài báo trình bày tổng quan các vấn đề về chất lượng điện năng, ảnh hưởng của chất lượng điện năng, đặc biệt là vấn đề sóng hài bậc cao trong hệ thống điện, đến các hệ thống cung cấp điện, các thiết bị điện – điện tử,... Bên cạnh đó, bài báo cung cấp cho bạn đọc hiểu rõ hơn thực trạng sóng hài ở Việt Nam trong một vài năm gần đây thông qua kết quả đo đạc, khảo sát và phân tích tại một số phụ tải khác nhau. Các thông tư hướng dẫn cũng như các quy định về sóng hài sẽ được đề cập trong bài báo. Các phương pháp xử lý sóng hài được giới thiệu tổng quát. Dựa vào quy định về mức độ ô nhiễm sóng hài cho phép theo tiêu chuẩn của Việt Nam, một thiết bị lọc sóng hài mới, đa chức năng, chưa có ở Việt Nam được đề xuất và được đánh giá thông qua việc lắp đặt, đo đạc thử nghiệm ngoài thực tế. Kết quả thử nghiệm thiết bị cho thấy, các chỉ số sóng hài đáp ứng quy định cho phép. Đây sẽ là bước tiến quan trọng trong việc xử lý sóng hài đang diễn ra hết sức phức tạp ở Việt Nam.
ẢNH HƯỞNG CỦA MÒN DỤNG CỤ CẮT ĐẾN RUNG ĐỘNG KHI TIỆN
Authors: Sơn Lê Thái , Chung Lương Hải , Thuận Nguyễn Bá
Published: June 2021

Trong gia công cắt gọt, mòn dụng cụ cắt ảnh hưởng lớn đến chất lượng sản phẩm cũng như năng suất gia công. Bài báo này trình bày phương pháp xác định lượng mòn và tuổi bền của dụng cụ cắt thông qua việc kiểm soát các thông số rung động của dụng cụ. Trong quá trình thí nghiệm, sau mỗi khoảng 3 phút tiến hành dừng máy và xác định lượng mòn của dụng cụ, đồng thời rung động của dao được thu thập về máy tính theo thời gian gia công để tiến hành phân tích. Kết quả cho thấy, ở giai đoạn mòn ban đầu, dụng cụ bị mòn nhanh, các thông số rung không ổn định. Sau một khoảng thời gian gia công, lương mòn dụng cụ ổn định và các thông số rung cũng ổn định. Sau đó, lượng mòn tăng nhanh, đồng thời các thông số rung tăng nhanh. Các kết quả này cho phép khẳng định các thông số rung của dụng cụ cắt (vận tốc, gia tốc và biên độ rung) phản ánh chính xác ba giai đoạn mòn điển hình của dụng cụ. Đây là phương án đánh giá, kiểm soát tuổi bền có chi phí đầu tư nhỏ hơn, đơn giản hơn với việc sử dụng cảm biến lực xác định tuổi bền của dụng cụ hiện nay.
NGHIÊN CỨU ĐỘNG LỰC HỌC MÁY CẮT ỐNG THÉP D45 VÀ XÁC ĐỊNH CÁC TỔN THẤT HỆ THỐNG NHẰM NÂNG CAO HIỆU SUẤT CỦA BƠM THỦY LỰC
Authors: Huy Triệu Quý , Hương Trần Thị , Đam Vũ Văn
Published: June 2021

Nghiên cứu này tính toán xi lanh thủy lực để tạo ra lực cắt cho máy cắt ống thép D45. Tổn thất hệ thống được tính toán để lựa chọn các thông số của bơm thủy lực nhằm nâng cao hiệu suất của động cơ dẫn động bơm. Phương pháp tính toán lý thuyết được áp dụng để xác định lực cắt, các thông số xylanh, tổn thất áp suất, tổn thất thể tích, công suất động cơ dẫn động bơm dầu và chọn bơm dầu cho hệ thống. Thực nghiệm thực hiện trên máy cắt ống thép D45 dùng để cắt các loại ống thép có đường kính 45 mm thành các loại biên dạng (khớp nối ống) sử dụng tại các hãng xe máy như Honda, Yamaha, Suzuki, SYM... Kết quả thực nghiệm đã cho thấy nghiên cứu phù hợp với các yêu cầu chính của sản xuất như lực cắt thích hợp, biên dạng cắt chính xác, hành trình của lưỡi cắt phù hợp và mức tiêu hao điện năng thấp.
Modeling and Wind Flow Analysis of an Eiffel (Open) Type Sub-Sonic Wind Tunnel
Authors: Namirian Zelieus , Mathure Shubham , Thorat Bhargavi , Khetree Prof. Surekha
Published: May 2021

Wind tunnel (WT) is a device that artificially produces airflow relative to a stationary body and measures aerodynamic force and pressure distribution, simulating the actual conditions with an important aspect of accurately feigning¬ the full complexity of fluid flow. The aim of the present study is to design the three dimensional geometry of a small, open-circuit (also known as Eiffel Type), and subsonic (low speed) wind tunnel (WT) capable of demonstrating or acting as a vital tool in aero-mechanics research. The project and fabrication itself, poses as an onerous task with the cynosure/central theme being the delineation/depiction of wind tunnel components such as Test Section, contraction cone, diffuser, drive system and settling chamber.
UTILIZATION OF ARDUINO-BASED BLUETOOTH CONNECTION FOR ELECTRONIC EQUIPMENT CONTROL WITH VOICE COMMANDS
Authors: Saiyar Hafdiarsya
Published: June 2021

Electronic equipment is a daily necessity in human life, but not infrequently we use electronic equipment excessively or ineffectively and the main problem is the factor of forgetting and being lazy to turn off electronic equipment. This makes wasteful use of electricity so that the costs charged are greater and there is the greatest risk of contact currents causing fire if we neglect to use lighting. Therefore, the author tries to make a control device for electronic equipment with voice commands connected to Bluetooth on a smartphone so that users can give commands to activate or deactivate electronic equipment with voice commands. The research method used is direct observation of the selected object, namely the author's house, and conducting literature studies related to the Arduino microcontroller. The Arduino microcontroller acts as the main controller connected to the relay module and the relay module connected to the power plug. In addition, Arduino is also connected to Bluetooth as a place to process incoming commands. The purpose of this research is to produce a tool that can make it easier to turn on or turn off electronic equipment with voice commands via an Android smartphone by utilizing an Arduino-based Bluetooth connection.
EMPLOYEE TURNOVER CLASSIFICATION USING PSO-BASED NAÏVE BAYES AND NAÏVE BAYES ALGORITHM IN PT. MASTERSYSTEM INFOTAMA
Authors: Palupi Endang Sri
Published: June 2021

Turnover occurs because many employees leave and new employees enter, so the turnover in and out of employees is quite high, therefore turnover can be controlled with a strategy to increase employee engagement. PT. Mastersystem Infotama is a System Integrator company or better known as a fairly large IT company with a total of approximately 600 employees. Turnover is high enough to make some divisions lack human resources, and the human capital management division is quite difficult to recruit employees to find candidates with various criteria that must be available in a short time. Competition in the IT world is quite tight both within companies and employees with good experience and abilities. Especially the sales department that holds a database of potential customers, and the engineer section that already has a certificate of expertise that is widely used in the IT business world. Therefore, it is necessary to classify what factors make employee turnover high by using the Naïve Bayes and Naïve Bayes algorithms based on Particle Swarm Optimization, so that they can be used as material for internal evaluation to increase employee engagement. The results of this study, classification using the Naïve Bayes algorithm, has an accuracy of 79.17%, while the classification using the Naïve Bayes algorithm based on Particle Swarm Optimization is 94.17%.
Simultaneous Monitoring and Control of Automation Systems with SCADA Based PLC
Authors: MƏMMƏDLİ Məryəm , ORTAÇ KABAOĞLU Rana
Published: May 2021

As technology develops all over the word, it is desired to be more efficient and less costly, and automatic control systems are demanded accordingly. The most important duties of the elements that constitute the automatic control system are quality of the established system and being cheap and functional. SCADA and PLC control systems, which are among the significant control systems, are utilized to implement these conditions placed against the elements. SCADA and PLC systems are automatic control systems that are very popular today. Both of them are used in almost every field of industry. This study has been implemented in the Academy automation R&D laboratory and applications have been developed with PLC and SCADA, which are indispensable for automation systems. All systems are connected to SCADA using 3 types of PLC, S7-300, S7-1200, S7-1500 and also MODBUS devices. These four systems transferred to SCADA are monitored on a screen. At the same time, the feature of being able to intervene in the system in case of malfunction, which is one of the important advantages of the SCADA system, has also been used.
PELAKSANAAN PEMBERIAN BANTUAN SOSIAL KEPADA KORBAN BENCANA BANJIR DAN LONGSOR
Authors: Prihhartini Sya'baningrum , Adara Reza Anggriyashati , Khadijah Siti
Published: June 2021

ABSTRAK Bencana banjir dan longsor secara beruntun menimpa Desa Cileuksa, Kecamatan Sukajaya, Kabupaten Bogor, Jawa Barat pada tanggal 1 Januari 2020. Ribuan orang harus dievakuasi karena rumah-rumah mereka disapu banjir dari Sungai Cidurian. Walaupun terjadi setahun yang lalu, para penyintas masih terpaksa tinggal di tempat pengungsian yang dibangun oleh tentara. Selain bencana tersebut, bencana lain terjadi di Kabupaten Bekasi pada tanggal 7 Februari 2021 dan menghancurkan banvak rumah. Bencana ini terjadi di tengah pandemi Covid-19 yang telah berdampak buruk terhadap kondisi ekonomi dan kesehatan masyarakat. Demi meringankan beban para korban, FKSB Universitas Islam 45 Bekasi berinisiasi membuat sebuah program pengabdian masyarakat yang terdiri dari kampanye penggalangan dana, menggalang dana dari masyarakat dan kerjasama dengan Kwartir Cabang Pramuka Kabupaten Bekasi. Program ini diharapkan bisa meningkatkan kesadaran tentang pentingnya penyediaan bantuan terhadap korban-korban bencana. Data dari hasil survei kepada para penerima bantuan menunjukkan bahwa masyarakat penerima bantuan merasa puas dengan bantuan yang diberikan. Program pengabdian masyarakat ini diharapkan bisa menjadi titik tolak bagi dari program-program pengabdian masyarakat selanjutnya yang akan ditekankan kepada pemberdayaan masyarakat di daerah bencana.   ABSTRACTOn January 1st, 2020, a flood which was succeeded with landslides struck Desa Cileuksa, Kecamatan Sukajaya, Kabupaten Bogor, Jawa Barat. Thousands of people were evacuated because their homes were swept by floods from Sungai Cidurian. Although the disaster happened a year ago, the survivors still suffer from the aftermath as they still have to live in shelters built by army. Besides that, another flood disaster took place in Kabupaten Bekasi on February 7th, 2021 in Kabupaten Bekasi and destroyed many houses. These disasters took places amid Covid-19 pandemic which has negatively affected people’s economic and health conditions. In order to provide reliefs to survivors, FKSB Universitas Islam 45 Bekasi initiated a social service program. The program consists of creating a campaign for charity program, raising donations from public, and working together with Kwartir Cabang Pramuka Kabupaten Bekasi. The program aims to raise awareness for provision of reliefs toward disasters’ survivors. The survey results show that most recipients are satisfied with the relief’s provision. The present program is expected to be a milestone for further programs which aim to the empowerment of disasters’ survivors.
ЙМОВІРНІСТЬ РОЗВИТКУ СТОМАТОЛОГІЧНОЇ ПАТОЛОГІЇ У ДІТЕЙ, ЯКІ ПРОЖИВАЮТЬ В ЗОНАХ РІЗНОГО АНТРОПОГЕННОГО НАВАНТАЖЕННЯ НА ОСНОВІ МОЛЕКУЛЯРНО-ГЕНЕТИЧНОЇ ОЦІНКИ МАРКЕРІВ МЕТАБОЛІЗМУ СПОЛУЧНОЇ ТКАНИНИ COL2A1 ТА MMP9
Authors: Скульська С.В. , Вербицька Т.Г. , Дєньга О.В.
Published: June 2021

Актуальність. Антропогенні фактори ‒ екологічні фактори, обумовлені різними формами впливу діяльності людини на природу. Діти більшою мірою, ніж дорослі, піддаються впливу екологічних факторів ризику. Роботи останніх років вказують на можли-вий взаємозв'язок поліморфізму колагену з розвитком захворювань сполучної тканини.Мета даного дослідження. Оцінка впливу поліморфних варіантів генів COL2A1 (6846 C> A), MMP9 (A-8202G) на показники твердих тканин постійних зубів, пародонтальних індексів і індексів гігієни порожнини рота у дітей, які проживають в зонах різного антропогенного навантаження.Матеріали та методи. Досліджували функціональ-но значущі поліморфізм COL2A1 (6846 C> A), MMP9 (A-8202G), оцінювали стан твердих тканин зубів, гі-гієни порожнини рота і тканин пародонту у дітей, які проживають в зонах різного антропогенного на-вантаження.Выводы. Дослідження стоматологічного статусу дітей з районів різного антропогенного навантажен-ня показало, що поліморфізм 6846 C> A гена COL2A1 асоційований з порушенням стану твердих тканин зубів, тканин пародонту і гігієни порожнини рота, вплив антропогенних факторів не є першорядним, тобто переважає генетична складова в розвитку стоматологічної патології твердих тканин зубів, тканин пародонту і гігієни порожнини рота. Вплив несприятливих факторів є переважаючим у розвитку стоматологічної патології твердих тканин зубів ді-тей незалежно від поліморфізму A-8202G гена ММР9. Не виявлено певних асоціацій між поліморфізмом A-8202G гена ММР9, станом тканин пародонта і гігієною порожнини рота.
ОЦІНКА ПОКАЗНИКІВ ШВИДКОСТІ СЛИНОВИДІЛЕННЯ ТА СТАНУ КИСЛОТНО-ЛУЖНОГО БАЛАНСУ РОТОВОЇ РІДИНИ В ДИНАМІЦІ ЛІКУВАННЯ ТЮТЮНОЗАЛЕЖНИХ ПАЦІЄНТІВ З ХРОНІЧНИМ ГЕНЕРАЛІЗОВАННИМ ПАРОДОНТИТОМ НА ТЛІ ХРОНІЧНОГО ГІПЕРАЦИДНОГО ГАСТРИТУ
Authors: Золотухіна О.Л.
Published: June 2021

На даний час питання захворювань тканин пародон-та, які розвиваються на тлі патології шлунку і фак-тору ризику – тютюнопаління, залишаються неви-вченими.Мета даної роботи. Оцінка показників швидкості слиновиділення, стану кислотно-лужного балансу ротової рідини в динаміці лікування тютюнозалеж-них пацієнтів з хронічним генералізованим пародон-титом на тлі хронічного гіперацидного гастриту.Матеріали та методи. Були вивчені показники шви-дкості слиновиділення та кислотно-лужного балансу в ротовій рідині 90 пацієнтів. Також ці показники бу-ли вивчені у 48 пацієнтів, що палять із хронічним ге-нералізованим пародонтитом на тлі хронічного гіпе-рацидного гастриту в динаміці лікування за допомо-гою новоствореного ЛПК.Результати дослідження. Відмічалося покращення показників швидкості слиновиділення та кислотно-лужного балансу ротової рідини пацієнтів, які отри-мували нову ЛПК.Висновки. Застосування новоствореного ЛПК прояв-ляє більш високу ефективність у лікуванні хронічного генералізованого пародонтиту на тлі хронічного гі-перацидного гастриту та хронічного тютюнопалін-ня.
АНАЛІЗ РОБОТИ ЕКСПЕРТНОЇ ПРОБЛЕМНОЇ КОМІСІЇ МОЗ ТА НАМН УКРАЇНИ «СТОМАТОЛОГІЯ» ЗА 2019 РІК
Authors: Скиба В.Я. , Іванов В.С.
Published: June 2021

Згідно Наказу МОЗ та НАМН України №322/41 від 13.05.2014 р. «Про зміни до Переліку експертних про-блемних комісій МОЗ та НАМН України та їх голів» у 2019 році продовжувала працювати Експертна про-блемна комісія МОЗ та НАМН України «Стоматоло-гія», головою якої є професор, доктор медичних наук Скиба В.Я.За минулий рік відбулося 2 засідання ЕПК МОЗ та НАМН України «Стоматологія» (Протоколи №№62, 63). За цей час надійшли на розгляд матеріали 1 нау-ково-дослідної роботи, 29 інформаційних листів, 28 нововведень та 2 методичних рекомендацій.
ІНДЕКС КЛІНІЧНОЇ ЕФЕКТИВНОСТІ ПРОВІДНИКОВОЇ АНЕСТЕЗІЇ ПРИ ЗНЕБОЛЮВАННІ ЗУБІВ НА НИЖНІЙ ЩЕЛЕПІ
Authors: Анісімов М.В. , Анісімова Л.В.
Published: June 2021

Мета роботи. Пропозиція та клінічне обґрунтування індексу місцевої анестезії, заснованого на критеріях клінічної ефективності з урахуванням особливостей різних методик, кількості анестезуючого розчину та фармакологічних властивостей діючої речовини.Матеріали і методи дослідження. Запропонований Індекс місцевої анестезії (ІМА) вивчали у трьох груп стоматологічних пацієнтів, які потребують депуль-пування молярів і премолярів нижньої щелепи за різ-ними показаннями. Всім пацієнтам проводилася ман-дибулярна анестезія (МА) традиційним методом, ві-дповідно до локальних протоколыв. Маніпуляції вико-нувалися одним лікарем. Пацієнтів по групах розподі-ляли залежно від використовуваного місцевого анес-тетика. Вік пацієнтів - від 18 років до 40 років.Результати та їх обговорення. Одними з основних фармакологічних характеристик місцевих анестети-ків є їх анестезуюча активність і системна токсич-ність. Відношення анестезуючої активності до сис-темної токсичності анестетика називається тера-певтичним індексом.Інтерпретація індексу дозволяє зробити висновок про те, що при виконанні однієї і тієї ж методики анес-тезії одним лікарем, її ефективність безпосередньо залежить від вибору анестетика і обернено пропор-ційна кількості використаного розчину.Даний фрагмент роботи показав, що ІМА дозволяє в цифрових значеннях визначити ефективність місце-вої анестезії з урахуванням обсягу і властивостей анестезуючого розчину.
ДОСЛІДЖЕННЯ ПРОТИМІКРОБНИХ ВЛАСТИВОСТЕЙ КОМПОЗИЦІЇ ДЛЯ ЛІКУВАННЯ ЗАПАЛЬНИХ УРАЖЕНЬ ПАРОДОНТУ ВІТЧИЗНЯНОГО ВИРОБНИЦТВА
Authors: Павленко О. В. , Кривцова М. В. , Случевська О. О. , Ступницька О. М.
Published: June 2021

Ціль дослідження. Запально-деструктивні захворю-вання пародонту в світі становлять не тільки зага-льномедичну, а й соціально-економічну проблему, яка спонукає до пошуку нових методів лікування та діаг-ностики. Сучасні концепції лікування хронічного гене-ралізованого пародонтиту передбачають застосу-вання комплексу терапевтичних, ортопедичних, хіру-ргічних і ортодонтичних методів лікування, і доволі часто їх ефективність є сумнівною.На сьогодні загальновизнаним препаратом вибору в пародонтології є хлоргексидину біглюконат (та його інші сполуки), оскільки він здатний пригнічувати ріст і формування колоній понад 80,00% мікроорганізмів біоплівки ротової порожнини.Також у клінічній практиці застосовують протимік-робні препарати системної дії, особливо у випадках агресивних і важких форм генералізованого пародон-титу, що виникають на фоні загальносоматичної патології, а також при ускладненнях хірургічних втручань. Матеріали та методи дослідження. Для проведення досліджень використовували типові музейні культу-ри ATTC (American Type Culture Collection, USA) Candida albicans ATCC 885–653; Staphylococcus aureus ATCC 25923; Escherichia coli ATCC 25922, Enterococcus faecalis ATCC 29212, Streptococcus pyogenes ATCC 19615, та клінічні культури ізольовані із ротової порожнини людей із запальними захворю-ваннями: мікроскопічні гриби роду Candida (C. albicans) Staphylococcus aureus, Escherichia coli, Streptococcus pyogenes, Enterococcus faecalis.Мінімальну бактерицидну та інгібуючу концентрацію досліджуваного гелю визначали у полістиролових пла-стикових 96-лункових планшетах.Результати дослідження та їх обговорення. Ре-зультати дослідження показали, що досліджуваний гель та розчин хлоргексидину біглюконат 0,05% чини-ли активний вплив на музейні та клінічні штами ла-бораторних мікроорганізмів.Висновки. Отже, досліджуваний гель для лікування запальних уражень пародонту вітчизняного виробни-цтва «Джен-Метрогелур» виявився ефективним протимікробним засобом відносно клінічних та лабо-раторних штамів мікроорганізмів. Високочутливими до засобу виявилися клінічні та музейні культури C. albicans. Чутливими до гелю були культури S. aureus та музейні штами S. pyogenes та E. coli. Помірно чу-тливими виявилися культури E. faecalis та клінічні штами S. pyogenes та E. coli.