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Tytuł:
Day-of-the-week effect among the smallest enterprises listed on WSE
Autorzy:
Keller, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/599447.pdf
Data publikacji:
2015
Wydawca:
Wyższa Szkoła Informatyki i Zarządzania z siedzibą w Rzeszowie
Tematy:
stock markets
stock anomalies
calendar anomalies
Warsaw Stock Exchange
Opis:
The text touches on the subject of the fi nancial markets in the context of behavioral theories. The author att empts to verify the occurrence of one of the popular calendar eff ects, the day-of-the- -week eff ect, on the Polish stock market. Another limitati on of the study area of the research is to include in the analysis only small companies. Many voices from the mainstream of behavioral fi nance say that the presence of anomalies listed is more evident in the case of small companies, which are not the focus of the majority of investors. In the proposed study, the data used contained companies in the Stock Exchange in Warsaw, with a maximum capitalizati on of 10 million PLN. Research sample includes quotati ons of these companies during the period January 2010-April 2014. In order to verify the hypothesis of the occurrence of the day-of-the-week eff ect among these companies the author used ARCH modeling. In the course of the analysis the author verifi ed negati vely the occurrence of the eff ect of weekdays in the proposed research sample.
Źródło:
Finansowy Kwartalnik Internetowy e-Finanse; 2015, 11, 3; 92-102
1734-039X
Pojawia się w:
Finansowy Kwartalnik Internetowy e-Finanse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Seismic and geochemical anomalies related to vertical migration of gas in the Radlin gas field
Autorzy:
Pietsch, K.
Strzetelski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2059327.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
vertical gas migration
seismic anomalies
surface hydrocarbon gas anomalies
geochemical anomalies
gas chimneys
Radlin gas field
Opis:
In the Radlin Rotliegend gas field (southwestern Polish Lowlands, Fore-Sudetic Region, Poznań Depression), modelling and reinterpretation of seismic data combined with surface gas surveys (free gas method) help identify "gas chimneys" and locate pathways of vertical migration. An almost impermeable Zechstein evaporite cover reduces the stream of vertical gas migration so that a dry surface geochemical zone occurs at the surface and no seismic disturbances are observed directly above the pay zone of the gas field. The surface gas anomalies form a halo-type pattern surrounding the gas field. The majority of surface hydrocarbon microseepages from the subsurface agrees with the seismically visualised geological structure. The belts of surface gas anomalies and the dry zones separating them run along the strike of Permian structures and faults. Vertical pathways of gas migration are recognisable as zones of seismic discontinuity and chaotic distribution of distinct reflections and diffracted waves. Seismic "gas chimney" effects coincide with surface hydrocarbon gas anomalies. Particularly, they appear above the upper terminations of faults disturbing the Zechstein deposits. The faults create the main a venues for secondary vertical migration of gas from the reservoir to the surface. "Gas chimneys" are observable in a shallow zone above the Muschelkalk (Tm) where higher gas saturation of more porous rocks produces a seismically traceable velocity effect.
Źródło:
Geological Quarterly; 2001, 45, 1; 1-14
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of ascent recharge on deep exploitable aquifers on the North European Plain (a case study of the Rogoźno salt anticline, Poland)
Autorzy:
Rasała, M.
Jażdzewska, J.
Powiązania:
https://bibliotekanauki.pl/articles/2060568.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
groundwater
ascending brines
hydrodynamic anomalies
hydrogeochemical anomalies
salt structures
palaeohydrogeological conditions
Opis:
In the paper, we analyse the impact of ascending brines from the Mesozoic basement on the formation of hydrogeological conditions of deep exploitable aquifers. In the North European Plain, there are numerous salt structures with associated tectonic deformations, which form migration zones of saline waters from the Mesozoic basement to the Cenozoic cover. This creates a geogenic threat to exploitable aquifers, especially in terms of groundwater exploitation conditions. Previous studies of these phenomena had been conducted on a regional scale and focused mainly on the distribution of chlorides in receiver aquifers without detailed analysis of hydrodynamical and hydrogeochemical effects of the ascent. As part of research into the topic, it is necessary at this point to develop the methodology of assessment of geogenic risks for groundwater, for example for reasons of protection of fresh groundwater resources. As the research area, a halotectonic anticline region was chosen, where the Mesozoic basement is characterized by strong tectonic deformation, and the deepest Cenozoic aquifer has a regional spread. Some simple analyses allowed to clearly identify the zones of saline groundwater ascent along tectonic discontinuities of the Mesozoic bedrock. This phenomenon causes the appearance of waters with a mineralisation up to 2000 mg/L in the exploitable aquifer. Ascent recharge through active faults causes the presence of zones with anomalously high piezometric pressure in the cover of the fault overlay. The shape of these zones is correlated with the course of tectonic deformations. Influence of geogenic pollution is greater in the marginal zones of the anticline than above it. For the full assessment of ascent impact on hydrogeological conditions of the receiver, it is necessary not only to analyse chloride concentrations, but also other groundwater components – i.e. sulphates. Hydrogeochemical analysis may allow for identification of the shallower and deeper ascent recharge zones from the Mesozoic basement. Comprehensive identification of these factors, even in the case of poor tectonic control, can contribute to optimization of groundwater exploitation and protection conditions in the areas potentially and actually threatened by ascent.
Źródło:
Geological Quarterly; 2017, 61, 4; 962--972
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Renal vascularization anomalies in the Polish population
Autorzy:
Sośnik, Henryk
Sośnik, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1393132.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
kidney
venous anomalies
Polish population
Opis:
Summary: The aim of the study was to determine the incidence of renal venous system congenital anomalies in the Polish population. Material and method: Vascular kidney samples were investigated by means of preparations and X-ray contrasting. The study the group comprised 281 male and 269 female specimens. Results: Congenital anomalies were diagnosed in 186 patients (33 8% of all cases), and they were more frequent in men than in women, albeit that difference was non-significant. The following anomalies were most commonly observed: multiple venous variations on the right side (20.4%), retroaortic course of the left renal vein (4.2%), and circumaortic venous ring of the left renal vein (3.8%). Other anomalies were diagnosed in 1%-2% of cases. Conclusions: Awareness and preoperative assessment of the venous system before abdominal aortic surgery, isolated collection of renal venous blood samples, and urological or kidney transplantation procedures is essential.
Źródło:
Polish Journal of Surgery; 2017, 89, 6; 26-30
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of negative ion mass spectrometry for simultaneous determination of sulfur isotope ratios δ33S and δ34S
Autorzy:
Hałas, Stanisław
Pieńkos, Tomasz
Pelc, Andrzej
Wójtowicz, Artur
Powiązania:
https://bibliotekanauki.pl/articles/763353.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
isotope anomalies
terrestrial minerals
sulfates
sulfides
Opis:
We describe a newly constructed dual inlet system and triple collector for precision study of sulfur isotope anomalies, Δ33S, using negative ion mass spectrometry. SO2 gas is admitted to the ion source where it is ionized ether to SO- or S- by low energy electrons (resonant ionization) and the ion beam is analyzed by a single focusing magnetic analyzer. Another gas which can be used for  δ33S and δ34S analysis by negative ion mass spectrometry  is SF6 on mass spectrum of SF5- ions.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AAA – Physica; 2015, 70
0137-6861
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AAA – Physica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioethics and Informed Consent in Prenatal Diagnostics
Autorzy:
Serapinas, Danielius
Narbekovas, Andrius
Powiązania:
https://bibliotekanauki.pl/articles/29760858.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Papieski Jana Pawła II w Krakowie
Tematy:
Informed consent
bioethics
chromosomal anomalies
prenatal diagnostics
Opis:
Innovative methods of prenatal diagnosis allow us to see the development of the fetus and to detect early disorders of fetal development, which may lead to an early diagnosis and possible treatment, or to a woman’s decision to terminate the pregnancy. Therefore, it is very important to accurately inform a woman about the risks and consequences of this life-related issue, even before deciding to perform prenatal tests; and after the results, when a misinterpreted diagnosis may lead a woman to terminate her pregnancy. The obligation of doctors to inform patients is inseparable from the requirement to receive informed consent. The two parts are mandatory for any medical procedure and intervention. The main requirements for the informed consent include rationality, sufficient and clear information, free will, and the form of consent conforming to the legal acts. However, informed consent is not an absolute requirement, as the patient has a right to remain uninformed. Additionally, under certain circumstances, it might be impossible to inform patients, or to receive consent from patients or their duly authorized representatives. Prenatal testing is an integral part of ante-natal care that aims to verify the proper development of the fetus, or to identify potential hereditary or chromosomal diseases at the earliest possible stage. Prenatal testing can be classified as non-invasive or invasive measures, according to the types of procedures In addition to this, according to the aim of the procedure, into diagnostic prenatal testing with the aim of prenatal therapy, and purely diagnostic prenatal testing. Purely diagnostic prenatal testing is closely connected with the problem of selective abortion. Part of this article covers the main problems of informed consent in prenatal diagnostics, by outlining two stages of the process: conveyance before prenatal testing, and interpretation of the results alongside presentation of the possible choices. The legal implications we consider are based on information from other European countries: we name the main questions analyzed by courts, including cases of “wrongful birth” and “wrongful life”; inappropriate information regarding possibilities of abortion; the right of a woman to use all available diagnostic methods; and the allocation of damages to the claimants.
Źródło:
The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II; 2023, 13, 1; 97-113
2391-6559
2083-8018
Pojawia się w:
The Person and the Challenges. The Journal of Theology, Education, Canon Law and Social Studies Inspired by Pope John Paul II
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A radon anomaly in soil gas at Cazzaso,NE Italy, as a precursor of an ML = 5.1 earthquake
Autorzy:
Vaupotič, J.
Riggio, A.
Santulin, M.
Zmazek, B.
Kobal, I.
Powiązania:
https://bibliotekanauki.pl/articles/148908.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon
soil gas
Barasol probes
anomalies
earthquakes
Opis:
At Cazzaso (Friuli) in northeast Italy, radon (222Rn) activity concentration in soil gas in a borehole at a depth of 80 cm has been monitored continuously (at a frequency of once an hour) since May 2004, using a Barasol probe (Algade, France). In addition, environmental parameters (air and soil temperature, barometric pressure) have been recorded. The results have been evaluated and the relationship between radon levels and seismic activity is discussed. Correlation between radon concentration and barometric pressure has been observed. Preliminary results have shown a distinct radon anomaly prior to some earthquakes.
Źródło:
Nukleonika; 2010, 55, 4; 507-511
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Powódź roku 1947. Z badań nad kontekstami klęsk elementarnych w Polsce po II wojnie światowej
Autorzy:
Jarosz, Dariusz
Miernik, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/949966.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Historii im. Tadeusza Manteuffla PAN w Warszawie
Tematy:
flood
natural disasters
climate anomalies
cold weather
Opis:
In the article the author has attempted to characterize certain contexts of the 1947 flood – one of the worst calamities in Poland in the 20th century. According to incomplete data, at least 65 people died as a result, which is more than in the 1934 flood, which until then had been considered the worst (with 55 victims). The discussion, based mainly on source materials which have not been used before and press articles, relates to issues such as: anomalous weather conditions in Poland and Europe in the years 1946–47 (a cold wave), reasons for the flood (climate-related, organizational, economic), loss of property, everyday life in areas struck by the calamity and attempts at its political objectifycation, and forms of aid for the victims.
Źródło:
Roczniki Dziejów Społecznych i Gospodarczych; 2013, 73
0080-3634
Pojawia się w:
Roczniki Dziejów Społecznych i Gospodarczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
AN ANALYSIS OF RAMADAN EFFECT BY GJR-GARCH MODEL: CASE OF BORSA ISTANBUL
Autorzy:
Akbalik, Murat
Tunay, K. Batu
Powiązania:
https://bibliotekanauki.pl/articles/489121.pdf
Data publikacji:
2016
Wydawca:
Instytut Badań Gospodarczych
Tematy:
stock returns
anomalies
Ramadan effect
GJR-GARCH
Opis:
Although there are a lot of studies testing the calendar effect in BIST, there are limited numbers of studies testing the Ramadan effect. In this study, the period of 05 August 1997–24 October 2014 is tested by the GJR-GARCH(1,1) model on the basis of BIST 30, 100, all, second national, sectors and sub-sectors. In some of the models, the dummy variable of Ramadan did not have significant coefficients. In the models that provide significant value of the dummy variable of Ramadan, coefficients of this variable are negative. This shows that, in the Ramadan, return rates of the second national index, chemistry, and manifacturing, textile, trust companies sectors are affected negatively. Any significant result could not be found whether Ramadan has effect upon other sector indices. Findings are in the direction that even if the month of Ramadan generally doesn’t increase the average return, it makes a positive impact on the market by reducing the volatility of returns.
Źródło:
Oeconomia Copernicana; 2016, 7, 4; 593-612
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asset pricing anomalies on Polish Stock Market according to employee stock options
Autorzy:
Łukowski, Michał
Przybylska-Kapuścińska, Wiesława
Powiązania:
https://bibliotekanauki.pl/articles/522463.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Asset pricing anomalies
Employee stock options
Market effectiveness
Opis:
The article presents asset pricing anomalies on Polish Stock Market due to implementation and exercise of the employee stock options (ESO). Such mispricing of the stock is a result of the investors’ expectations according to the market and non-market conditions of ESOs as they may influence company’s future performance. Implementation and exercise of the ESOs makes it possible to examine polish market effectiveness and analyse investors’ behaviour. The research conducted for this paper reveals the influence of the company itself as well as the decisions made by investors. The aim of the article is to verify if a different set of market and non-market conditions results in various changes of the stock price.
Źródło:
Journal of Economics and Management; 2015, 21; 90-101
1732-1948
Pojawia się w:
Journal of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chest wall – underappreciated structure in sonography. Part II: Non-cancerous lesions
Ściana klatki piersiowej – struktura niedoceniana w ultrasonografii. Część II: Zmiany nienowotworowe
Autorzy:
Smereczyński, Andrzej
Kołaczyk, Katarzyna
Bernatowicz, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/1033318.pdf
Data publikacji:
2017
Wydawca:
Medical Communications
Tematy:
anomalies
fractures
inflamed ribs
scapula
sternoclavicular joints
sternum
Opis:
The chest wall is a vast and complex structure, hence the wide range of pathological conditions that may affect it. The aim of this publication is to discuss the usefulness of ultrasound for the diagnosis of benign lesions involving the thoracic wall. The most commonly encountered conditions include sternal and costal injuries and thoracic lymphadenopathy. Ultrasound is very efficient in identifying the etiology of pain experienced in the anterior chest wall following CPR interventions. Both available literature and the authors’ own experience prompt us to propose ultrasound evaluation as the first step in the diagnostic workup of chest trauma, as it permits far superior visualization of the examined structures compared with conventional radiography. Sonographic evaluation allows correct diagnosis in the case of various costal and chondral defects suspicious for cancer. It also facilitates diagnosis of such conditions as degenerative lesions, subluxation of sternoclavicular joints (SCJs) and inflammatory lesions of various etiology and location. US may be used as the diagnostic modality of choice in conditions following thoracoscopy or thoracotomy. It may also visualize the fairly common sternal wound infection, including bone inflammation. Slipping rib syndrome, relatively little known among clinicians, has also been discussed in the study. A whole gamut of benign lesions of thoracic soft tissues, such as enlarged lymph nodes, torn muscles, hematomas, abscesses, fissures, scars or foreign bodies, are all easily identified on ultrasound, just like in other superficially located organs.
Ściana klatki piersiowej to rozległy i złożony obszar tkankowy, dlatego spotyka się w nim liczne zmiany chorobowe. Celem tego artykułu jest przedstawienie przydatności ultrasonografii w diagnostyce zmian nienowotworowych ściany klatki piersiowej. Najliczniejszą grupę zmian stanowią uszkodzenia urazowe żeber i mostka oraz procesy chorobowe w węzłach chłonnych tej okolicy. Ponadto ultrasonografia pozwala wyjaśnić niejasną przyczynę zespołu bólowego przedniej ściany klatki piersiowej po zabiegach resuscytacji krążenia. Na podstawie dostępnego piśmiennictwa oraz doświadczenia autorów niniejszej pracy z dużym przekonaniem można stwierdzić, że ultrasonografia wyraźnie przewyższa radiografię konwencjonalną w ocenie uszkodzeń urazowych rusztowania chrzęstno-kostnego klatki piersiowej, dlatego może być uznawana za metodę pierwszego kroku diagnostycznego. Badanie USG rozwiązuje problemy kliniczne w przypadku różnych anomalii żeber i chrząstek, które mogą budzić podejrzenie obecności zmian nowotworowych. W zasięgu tej metody znajdują się także inne patologie: zmiany zwyrodnieniowe i nadwichnięcia stawów mostkowo-obojczykowych oraz zapalenia o różnym charakterze i lokalizacji. Ultrasonografia może być pierwszą metodą diagnostyczną w zmianach chorobowych ściany klatki piersiowej po torakoskopiach i operacjach z otwarciem klatki piersiowej. Badaniem ultrasonograficznym można również wykazać nierzadko występujące powikłania infekcyjne po sternotomiach, łącznie z zapaleniem kości. W pracy opisano mało znany zespół ślizgających się żeber. Zmiany nienowotworowe w tkankach miękkich ściany klatki piersiowej, takie jak: powiększone węzły chłonne, uszkodzone mięśnie, krwiaki, ropnie, przetoki, blizny lub ciała obce, są łatwo rozpoznawane w badaniu ultrasonograficznym, podobnie jak w innych narządach powierzchownie położonych. Artykuł w wersji polskojęzycznej jest dostępny na stronie http://jultrason.pl/index.php/wydawnictwa/volume-17-no-71
Źródło:
Journal of Ultrasonography; 2017, 17, 71; 275-280
2451-070X
Pojawia się w:
Journal of Ultrasonography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trace elements and REE enrichment at Seboah Hill, SW Egypt
Autorzy:
Hassan, Kamaleldin M.
Powiązania:
https://bibliotekanauki.pl/articles/127605.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
Oversaturated peralkaline rocks
trace elements
REE
thorium/uranium anomalies
Opis:
Seboah Hill - a small body of peralkaline granite (< 0.1 km2) in south-western Egypt containing aegirine minerals ± magnesiohornblende ± riebeckite, cut by dikes of riebeckite-aegirine rhyolite, and exhibiting high radioactivity in veins of K-feldspar-aegirine-chalcedony-quartz ± trace hematite ± trace goethite was sampled and analyzed using inductively coupled plasma methods. Whole-rock chemical compositions of 5 granite, 3-rhyolitedike and 10 radioactive vein samples are presented. Of special significance is the enrichment of trace elements and rare earth elements (REE) in the radioactive veins. These include up to 6081 ppm Zr, 4252 ppm Ce, 1514 ppm Nd, 1433 ppm La, 1233 ppm Nb, 875 ppm Y, 388 ppm Pr, 350 ppm Th, 222 ppm Sm, 189 ppm Gd, 159 ppm Dy, 153 ppm Hf, 83 ppm Er, 76 ppm Yb and 58 ppm U. The chondrite-normalized patterns of REE in all samples show only limited variation and have negative europium (Eu) anomalies. These findings suggest that the sources of the REE are genetically related. Values of the Eu anomalies vary from 0.38-0.41 for the radioactive veins, 0.39-0.53 for the granite and 0.31-0.44 for the rhyolite dikes. Eu variations are consistent for different paragentic stages.
Źródło:
Mineralogia; 2018, 49, 1/4; 47-65
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Aspects of Using Markov Models in Research of Exchange Rate Volatility
Teoretyczne aspekty wykorzystania modeli Markowa do badania zmienności kursu walutowego
Autorzy:
Włodarczyk, Aneta
Szmigiel, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/904704.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Markov models
time series
exchange rate volatility
calendar anomalies
Opis:
During modeling of short-run exchange rate fluctuations, there is usually a need for taking into consideration some random-type conditions, i.e. it is necessary to abandon the fundamental exchange rate theories in favor of probabilistic modeling. Among stochastic models, of special interest are Markov models. The main advantages of Markov models include a relative simplicity of construction, easy inferences, well-known estimation methods and especially consistence of properties of these models with the observed properties of many real phenomena. Application of switching models is based on a general assumption that the examined time series can be presented as sequences of random variables of a known type of conditional distribution in all regimes. Known from literature propositions concerning the modeling of exchange rate with the use of switching models did not provide sufficiently good forecasts of the future exchange rate levels because of, among others, low frequency of data used for the construction of the model (quarterly or monthly data). The authors are going to continue the examination of the PLN exchange rate fluctuation with the use of Markov models that was started in this paper. The next stage of their work will be connected with conducting empirical research concerning the occurrence of calendar anomalies in the Polish currency market. For this purpose, a new method based on the Markov chains theory will be applied, which offers a new perspective to this problem. Testing o f the calendar time hypothesis has been considered so far mostly in the aspect of comparison of daily expected values and variances of exchange rate return rates. Then, on the basis of the da ta concerning exchange rates for high measurement frequency, a Ma rkov switching model will be constructed and used for description of the PLN depreciation and appreciation period.
Prawidłowe oszacowanie kierunku zmian kursu wymiany może zmniejszyć ryzyko inwestycji w walutę lub może pozwolić na osiągnięcie większych dochodów z tej inwestycji. W opracowaniu tym autorzy przedstawiają propozycję zastosowania modeli Markowa do wykrycia i opisania prawidłowości rządzących procesem zmienności kursu walutowego. W pierwszej części została wykorzystana teoria łańcuchów Markowa do badania anomalii kalendarzowych występujących n a rynku walutowym związanych z efektem weekendowym lub efektem stycznia. W artykule przedstawiona została również metoda o parta na teorii łańcuchów Markowa, k tó ra może posłużyć d o zbadania wzajemnych powiązań pomiędzy zmiennością wolumenu obrotu oraz zmiennością cen dla terminowych kontraktów walutowych. W drugiej części zostaną przedstawione zagadnienia związane z budową i estymacją parametrów przełącznikowych modeli Markowa. W oparciu o modele przełącznikowe można prognozować zmiany kursu walutowego. Praca ma charakter teoretyczny. Badania empiryczne zostaną przeprowadzone w późniejszym terminie.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2005, 194
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ANALYSIS OF MONTHLY RATES OF RETURN IN APRIL ON THE EXAMPLE OF SELECTED WORLD STOCK EXCHANGE INDICES
Autorzy:
Borowski, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/517371.pdf
Data publikacji:
2016
Wydawca:
Instytut Badań Gospodarczych
Tematy:
market efficiency
financial market seasonality
market anomalies
April effect
Opis:
The article presents a study of the effectiveness of 22 selected stock indices with the use of the rates of return in the month of April. The portfolio replicating the stock index was bought at the closing prices on the last session in March, and sold at the closing prices on the last session in April. The presence of market inefficiency is demonstrated in cases of the following indices: All-Ord, AMEX, BUX, CAC40, DAX, DJIA, DJTA, DJUA, EOE, FTSE100, SMI, SP500, but for the following indices: B-Share, Bovespa, Buenos, Hang-Seng, MEX-IPC, Nasdaq, Nikkei, Russel, TSE and WIG, the obtained monthly rates of return were statistically equal to zero. In the last part of the article, the correlation coefficients of rates of return for analyzed indices in month of April were surveyed.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2016, 11, 2; 307-325
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania magnetyczne krateru Lonar
Magnetic survey of Lonar crater
Autorzy:
Szyszka, Mateusz
Plado, Jüri
Lingadevaru, Muddaramaiah
Syed, Hamim Jeelani
Powiązania:
https://bibliotekanauki.pl/articles/1033114.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
anomalie magentyczne
crater
ejecta
impakty
kratery
magnetic anomalies
magnetometer
Opis:
Lonar crater in India, centered at 19.97°N and 76.50°E is relatively young (few tens of thousands years) and, thus, well preserved meteorite impact structure. This 1.88-km-diameter simple structure has been formed into the 66 Ma old Deccan traps. As the target of Lonar is magnetically homogeneous, it is a perfect site to study the effect of relatively small impact event into the magnetic properties of rocks, and the magnetic field. In October 2017, has been performed ground magnetic mapping of Lonar with help of two proton precession magnetometers. The mapping was done in a squared area of about 36 km2 (6´6 km) including the crater depression, rims, and surrounding terrain. Magnetic map (not corrected for latitude) reveals a circular negative anomaly more than 1000 nT in amplitude, which corresponds to the crater depression. The negative anomaly is surrounded by semicircular feature of up to 500 nT positive anomalies that correlate with present rim of the crater. The total diameter of the Lonar magnetic anomalies is about 2.25 km, which is just 20% more compared to the crater rim-to-rim diameter.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2018, 9; 145-149
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł

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