Can the publication of annual financial reports become an opportunity for insider trading?

Illegal insider trading is a problem that involves most of financial markets. Unusual abnormal returns as well as increased trading volumes observed ahead o price sensitive information can be signals of this type of market abuse behavior. In this paper, I study the occurrence of insider trading on the Warsaw Stock Exchange. I verify if publications of annual financial reports of WIG issuers can be preceded by this phenomenon. The study includes reports from the period between 1 January, 2010, and 29 May, 2014. In order to define abnormal returns, I suit the GARCH process to daily returns and use event-study analysis. Potential insider trading behaviors are found with the use of two-day cumulative abnormal returns in a first step and with the use of daily abnormal returns afterwards. The publications that are marked with potential informed price movements are analyzed for the presence of extremely high abnormal trading volumes, which can be additional signals of market abuse

Znaczenie dialogu w nauczaniu języka drugiego w kontekście kulturowym

Zadanie pt. Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę

Sposoby i środki porozumiewania się cudzoziemców we wstępnym okresie nauczania języka polskiego

Zadanie pt. Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę

Amerykańska wielokulturowość a nauczanie kultury Europy Wschodniej

Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę

The impact of the steel cord construction on its decline of breaking force after fatigue test in bidirectional bending conditions

In the paper the influence of bidirectional bending on breaking force of steel cord has been assessed. Tests were carried out under laboratory conditions on three types of cord. It was found that bidirectional bending of steel cord cause the deterioration of strength properties and weakening of steel cord as a result of its fatigue. The obtained results may find application in the wire industry while implementing the new production technologies of steel cord

Astrophysical constraints on non-standard coherent neutrino-nucleus scattering

The exciting possibility of detecting supernova, solar, and atmospheric neutrinos with coherent neutrino-nucleus scattering detectors is within reach, opening up new avenues to probe New Physics. We explore the possibility of constraining non-standard coherent neutrino-nucleus scattering through astrophysical neutrinos. Sensitivity bounds on the mass and coupling of the new mediator are obtained by inspecting the modifications induced by the new interaction on the recoil rate observable in the upcoming RES-NOVA and DARWIN facilities. Under the assumption of optimal background tagging, the detection of neutrinos from a galactic supernova burst, or one-year exposure to solar and atmospheric neutrinos, will place the most stringent bounds for mediator couplings $g \gtrsim 10^{-5}$ and mediator masses between 1 and 100 MeV. A similar, but slightly improved, potential to COHERENT will be provided for larger mediator masses. In particular, RES-NOVA and DARWIN may potentially provide one order of magnitude tighter constraints than XENON1T on the mediator coupling. Non-standard coherent neutrino-nucleus scattering may also force neutrinos to be trapped in the supernova core; this argument allows to probe the region of the parameter space with $g \gtrsim 10^{-4}$, which is currently excluded by other coherent neutrino-nucleus scattering facilities or other astrophysical and terrestrial constraints.Comment: 20 pages, 12 figures. Discussion on the forecasted bounds extended, conclusions unchanged. Matches version accepted in Phys. Rev.

Children's health and environmental - social factors

The article is devoted to the study of the health status of children and adolescents. Examines the influence of ecological and social environment on the processes of growth and differentiation of child's organism, as well as features of sexual development.Shows the dynamics of morbidity of children and adolescents G. Balashova and Balashov districtСтатья посвящена изучению состояния здоровья детей и подростков. Рассматривается влияние экологической и социальной обстановки на процессы роста и дифференцировки организма ребёнка, а также особенностям полового развития. Показана динамика заболеваемости детей и подростков г. Балашова и Балашовского район

Perceived and desired body weight among female university students in relation to BMI-based weight status and socio-economic factors

The aim of the study was to verify if the accuracy of weight perception among young women depends on their socioeconomic status and BMI–based weight status. In addition, the survey contained questions whether women were satisfied with their weight and tested if the desire to change weight is affected by real body weight and weight perception. The sample consisted of 1,129 female university students, aged 20–24. BMI was calculated from measured weight and height. The questionnaire contained questions about socio-economic status, weight perception and desired body weight. 71.9% of the surveyed students correctly estimated, 24.2% overestimated and 3.9% underestimated their body weight. Underweight women tended to incorrectly assess their body weight more often than normal weight women or overweight women (43.2% vs. 75.4% vs. 77.2%). Students from families of high socio-economic status slightly more often estimated their weight status correctly than students with average and low status, but the difference was statistically significant only in the case of the factor “mother’s education”. Most of surveyed women expressed the desire to weigh less or/and to have thinner waist, hips or thighs. The desire to be thinner was associated with body weight status and body weight perceptio

Procjena životnog stila mladih žena smanjene, normalne i prekomjerne tjelesne težine

The aim of this study was to compare eating and lifestyle habits between underweight, normal weight and overweight young women. Data obtained from a survey of 1129 students of the three higher education institutions in Kielce, Kraków and Opole (Southern Poland) were analysed. BMI was used to define underweight, overweight and obesity. Eating and lifestyle habits were assessed based on the information received from surveyed students. The study group consisted of women of childbearing-age and a special attention was paid to analyse habits correlated with the risk factor for pregnant women (low consumption of dairy products, meat, fish, fruits and vegetables, cigarette smoking, alcohol and caffeine intake). In the studied group, the prevalence of underweight was higher than the prevalence of overweight and obesity (11.1% vs. 7.0%). There were no significant differences in nutritional habits between the three weight groups. The responding students, regardless their weight status, presented numerous unhealthy eating habits. Underweight students more frequently took multivitamin supplements, less frequently followed an alternative diet, smoked cigarettes or drank larger amounts of coffee than normal weight and overweight women. Underweight and normal weight women more frequently participated in sports activities than overweight and obese women. However, 39.2 percent of the surveyed women declared that they seldom or never perform any sport activities. The results show that majority of young women present numerous unhealthy behaviours. Unhealthy habits occur with the same frequency among underweight students as among normal weight students or overweight ones.Cilj je ovog istraživanja usporediti navike u hranjenju i životnom stilu izmedu mladih žena smanjene, normalne i prekomjerne tjelesne težine. Analizirani su podaci prikupljeni istraživanjem 1129 studentica u tri ustanove visokog obrazovanja u Kielce, Kraków i Opole (južna Poljska). BMI se rabio za definiciju smanjene, normalne te prekomjerne tjelesne težine te pretilosti. Navike u hranjenju i životnom stilu procijenjene su na temelju podataka dobivenih od istraživanih studentica. Posebna pažnja posvečena je navikama koje su povezane s faktorima rizika za trudne žene (smanjena konzumacija mliječnih proizvoda, mesa, ribe, voča i povrča, pušenje, konzumacija alkohola i kofeina). U istraživanojskupini prevalencija smanjene težine bila je veča od povečane težine ili pretilosti (11.1% vs. 7.0%). Nije bilo značajnih razlika u navikama hranjenja izmedu tri kategorije težine. Studentice su bez obzira na svoju težinu pokazale brojne nezdrave navike u hranjenju. Studentice smanjene težine češče su uzimale multivitaminske preparate, rijede su slijedile alternativnu dijetu, pušile ili pile velike količine kave nego one normalne ili prekomjerne težine. Žene smanjene i normalne težine češče su se bavile sportskim aktivnostima od pretilih ili onih s prekomjernom težinom. 39.2 % ispitanih žena izjavilo je da se rijetko ili nikad ne bave nikakvim sportskim aktivnostima. Rezultati pokazuju da večina žena pokazuje nezdrava ponašanja. Nezdrave navike jednako su učestale medu studenticama sa smanjenom kao i u onih s normalnom i prekomjernom težinom

Distinctive nuclear signatures of low-energy atmospheric neutrinos

New probes of neutrino mixing are needed to advance precision studies. One promising direction is via the detection of low-energy atmospheric neutrinos (below a few hundred MeV), to which a variety of near-term experiments will have much-improved sensitivity. Here we focus on probing these neutrinos through distinctive nuclear signatures of exclusive neutrino-carbon interactions -- those that lead to detectable nuclear-decay signals with low backgrounds -- in both neutral-current and charged-current channels. The neutral-current signature is a line at 15.11 MeV and the charged-current signatures are two- or three-fold coincidences with delayed decays. We calculate the prospects for identifying such events in the Jiangmen Underground Neutrino Observatory (JUNO), a large-scale liquid-scintillator detector. A five-year exposure would yield about 16 neutral-current events (all flavors) and about 16 charged-current events (mostly from $\nu_e + \bar{\nu}_e$, with some from $\nu_\mu + \bar{\nu}_\mu$), and thus roughly 25\% uncertainties on each of their rates. Our results show the potential of JUNO to make the first identified measurement of sub-100 MeV atmospheric neutrinos. They also are a step towards multi-detector studies of low-energy atmospheric neutrinos, with the goal of identifying additional distinctive nuclear signatures for carbon and other targets.Comment: 13 pages, 7 figures, 1 appendix. Minor changes, matches version published in Phys. Rev.