Browsing by Issue Date, starting with "2015"

Now showing 1 - 20 of 502

Access status: Open Access ,
European perpetrator programmes: a survey on day-to-day outcome measurement
(Wydawnictwa AGH, 2015) Ginés Canales, Oriol; Geldschläger, Heinrich; Nax, David; Ponce, Álvaro
Evaluating the results of programmes for perpetrators of domestic violence is essential for both policy makers and practitioners, and a growing number of studies have addressed this issue. However, few studies have described the ongoing, day-to-day outcome measurements routinely undertaken by perpetrator programmes to monitor their results. As part of the <i>IMPACT Evaluation of European Perpetrator Programmes</i> project, in the present study 134 domestic violence perpetrator programmes from 22 European countries answered a survey on the designs, methods and instruments they use in their current day-to-day outcome monitoring practice and on the obstacles to and need for improvements in this practice. The main results include the findings that 20% of programmes do not measure outcomes at all, that there is a great diversity in methods and instruments used, and a low percentage of programmes make use of data from the victims/survivors and from follow-ups.
Access status: Open Access ,
An assessment of the influence of the main oil industry technological processes on the environment
(2015) Mandrik, Oleg Mikolajovič; Pukìš, Arsen Volodimirovič; Mihajlûk, Ûliâ Dmitrìvna
This article discusses the main dangerous ecological factors of influence of each individual technological process element of oil production on the environment, namely: preparation of the ground for well construction, oil production, transportation of well production, its storage in reservoirs, and storage of the oil industry wastes. There was developed a primary classification of the characteristic influences of the main oil industry technological processes onto the environment.
Access status: Open Access ,
Linear Swelling Test (LST) of clay formation under the influence of newly developed drilling fluids with the addition of cationic polymers
(2015) Wysocki, Sławomir; Wiśniowski, Rafał; Ryznar, Dawid; Gaczoł, Magdalena
This paper shows research of Linear Swelling Test (LST) of shale rocks under the influence of three drilling muds with different cationic polymers. Tested polymers have been synthetized at the Drilling, Oil and Gas Faculty of AGH UST Krakow. Research findings indicate that synthesized polymers as well as developed on its base drilling fluids effectively inhibit hydration and prevent the disintegration of clay formation.
Access status: Metadata only ,
Vademecum inżyniera chemika
(2015) Grabowska, Ewelina
Wydział Inżynierii Materiałowej i Ceramiki; Centrum e-Learningu i Innowacyjnej Dydaktyki
Strona poświęcona jest wybranym działom chemii (zakładka „Wykłady”) oraz ubogacona w oznaczenia z analizy chemicznej cementu, do samodzielnego wykonania (zakładka „Laboratorium”). Każdy może sprawdzić swoje umiejętności poprzez rozwiązanie testów (zakładka „Testy”). Dla ułatwienia w tej samej zakładce do pobrania przykłady nazewnictwa związków organicznych, instrukcje do sporządzania roztworów wraz z obliczeniami i mini-tablice chemiczne. Dla bardziej dociekliwych w zakładce „Wykłady” znajdują się pliki dotyczące sprzętu laboratoryjnego, angielskiej terminologii związków chemicznych oraz słowniczek pojęć. <br><br>Zakładka wykłady – tematyka: <ul><li>chemia ogólna i nieorganiczna,</li><li>chemia fizyczna,</li><li>chemia ciała stałego,</li><li>chemia organiczna, </li><li>chemia analityczna, </li><li>analiza instrumentalna.</li></ul>Strona w 2015 r. brała udział w konkursie <a href="https://notatki.cel.agh.edu.pl/">„Notatki w Internecie”.</a>
Access status: Open Access ,
High-temperature rheometry of blast furnace synthetic slags doped with TiO₂ and TiN
(2015) Migas, Piotr; Ślęzak, Marta
Development has been conducted regarding the methodology of rotational measurements with a high temperature rheometer using Searle's method. The rheological analysis of liquid systems CaO-SiO2-Al2O3-MgO-TiO2 slags, and solid particles of titanium nitride TiN are presented (within a range of 0.1-0.7 of the volume fraction of TiN). The measurements were conducted at a range between 1310°C and 1500°C, which is typical for high-temperature zones in a blast furnace. The main objective of the study was to analyze the possibilities of viscosity measurements in homogenise and heterogenic systems (not standard systems within the industrial practice). The measurements were conducted for totally liquid blast furnace slags which show similarity to ideally viscous Newtonian bodies and also for heterogenic systems.
Access status: Open Access ,
Numerical simulation of drilling fluid flow in annular the space of the borehole
(2015) Kowalska-Kubsik, Iwona
This paper presents the numerical results of a numerical analys is of drilling fluid flow through annular space in the borehole. The analysis used the Herschel–Bulkley rheological fluid model. The obtained results of the analysis for three cases with variable geometry. Variable geometry is associated with a larger diameter drill in the joints of drill pipes, and consequently, with reduced flow cross-section. A comparison of pressure values at the end of the analyzed examples showed that in the example of a simple drill pipe with out joints, pressure values were 30% higher than in the case, which takes into account changes in the geometry of the joints.
Access status: Open Access ,
Hyperbolicity of systems describing value functions in differential games which model duopoly problems
(2015) Zwierzchowska, Joanna
Based on the Bressan and Shen approach (Bressan and Shen, 2004; Shen, 2009), we present an extension of the class of non-zero sum differential games for which value functions are described by a weakly hyperbolic Hamilton–Jacobi system. The considered value functions are determined by a Pareto optimality condition for instantaneous gain functions, for which we compare two methods of the unique choice Pareto optimal strategies. We present the procedure of applying this approach for duopoly.
Access status: Open Access ,
Problem of water supply in the Ostra and Zawadka catchements in Dębica area (Poland)
(Wydawnictwa AGH, 2015) Andrychowicz, Anna; Kawa, Krystian
Constantly growing demand of water makes it necessary to search for new perspective areas in terms of gain groundwater.
Access status: Open Access ,
A geotouristic valuation of the Marsyangdi Valley in the Annapurna Himal region and its potential for the development of geotourist attractions
(2015) Łach, Janusz Stanisław
The Marsyangdi Valley in the Annapurna Himal region is one of the most popular tourist-trekking attractions in Nepal. The performed evaluation of geotourist (geomorphological and hydrographic) objects and phenomena demonstrated a wide range of forms and, correspondingly, a huge potential for the development of geotourist attractions. The structure of The Marsyangdi Valley, which is a representative of a valley region of the High Himalaya, situated on metamorphic rocks, shows the co-existence of three major geomorphic processes: glacial, fluvial and slope, which determine specific landscape forms. Since the late 20th century, the landscape has been heavily affected by anthropogenic factors (grazing, land cultivation, settlement), reaching as far as 3500 meters above sea level, as well as by the dynamic growth and development of tourism. Expanding tourist infrastructure contributes to, inter alia, the degradation of the narrow valley bottom (tourist accommodation) and to increased mass movement on tourist trails. Despite its negative effects, tourism also exerts a positive influence on the preservation of the cultural heritage (sacred sites), which largely dominate the landscape and are a significant tourist attraction. The research was instrumental in defining the Marsyangdi Valley, characteristic of a geomorphological trail, as an excellent and qualified attraction in geotourist-exploratory tourism.
Access status: Open Access ,
The methods of pressures prediction based on geophysical data
(2015) Wiśniowski, Rafał; Toczek, Przemysław
Prediction of reservoir pressure and so its values at an early stage of wellbore designing significantly increases the profitability of exploration and production wells design. The prediction of rock mass pressures can be performed in a number of ways. The prediction methods have been reviewed since the 1950s. The methods of empirical forecasting of pressures proposed by Eaton B.A. as well as Hottman and Johnson were described in the paper. The paper also refers to the prediction of rock mass pressures on the basis of seismic well log results obtained from works performed on the same geologic unit. A relation between basic parameters of rocks along the wellbore profile is shown. The Eaton method was used for empirical determining pressure for a planned well based on seismic data form the existing well.
Access status: Open Access ,
Phase equilibria for liquefied natural gas (LNG) as a multicomponent mixture
(2015) Włodek, Tomasz
Liquefied natural gas (LNG) has an increasingly important role in the global natural gas market. Global demand for natural gas will grow over the coming years. LNG is transported by ships to unloading points on the storage terminals. During the LNG unloading and storage processes some part of LNG evaporates into gas phase and causes changes in the composition of stored LNG. The main component of LNG is methane, the remaining components are primarily ethane, propane, butane and nitrogen. Depending on the participation of these components the basic thermodynamic parameters of LNG can significantly change. LNG is also product sensitive to changes of temperature. In order to better prediction of changes of individual parameters of stored LNG caused by changes of temperature and LNG composition vapor-liquid equilibrium (VLE) calculations are performed for cryogenic conditions using equations of state.
Access status: Open Access ,
The modified Dräger probe to the geochemical research of the soil gases composition
(2015) Fąfara, Zbigniew; Ilkiv, Igor; Solecki, Tadeusz
The Dräger probe in the measurement set to the geochemical research of the soil gases composition is inconvenient to use. It's heavy, which are reąuired to operate at least two people. Cumbersome and time-consuming is to place it into the soil by impact method, and often there is fail to reach the planned measurement depth. For this reason, there was designed and made the new modified Dräger probe. The new probe has significantly lower mass and outer diameter. In principle it should be possible to introduce it into the soil by pushing, which will greatly facilitate and accelerate conducting the geochemical research of the soil gases composition.In the autumn of 2014 has been tested the modified Drager probe. The purpose of this study is to assess it suitability to conduct the geochemical research of the soil gases composition. In total there were performed 374 measurements of the soil gases composition at different depths in the 247 measurement points. In 99 cases (26.5%) there was failed to perform the measurement because the soil gases flow rate through the meter was too little. Pulling probe usually allowed to perform the research - in only 6 measurement points (2.4%), it was impossible. The average depth of the measurement point is equal to 0.78 m.
Access status: Open Access ,
O (nie)zbędności opowiadania. Refleksje teoretyczno-krytyczne na temat badań narracyjnych i perspektywy storytelling
(Wydawnictwa AGH, 2015) Rancew-Sikora, Dorota; Skowronek, Katarzyna
Access status: Open Access ,
Positive solutions with specific asymptotic behavior for a polyharmonic problem on Rn
(2015) Dhifli, Abdelwaheb
This paper is concerned with positive solutions of the semilinear polyharmonic equation $(-\Delta)^{m} u = a(x){u}^{\alpha}$ on $\mathbb{R}^{n}$, where $m$ and $n$ are positive integers with $n\gt 2m$, $\alpha\in (-1,1)$. The coefficient a is assumed to satisfy $a(x)\approx{(1+|x|)}^{-\lambda}L(1+|x|)\quad \text{for}\quad x\in \mathbb{R}^{n},$ where $\lambda\in [2m,\infty)$ and $L\in C^{1}([1,\infty))$ is positive with $\frac{tL'(t)}{L(t)}\longrightarrow 0$ as $t\longrightarrow \infty$; if $\lambda=2m$, one also assumes that $\int_{1}^{\infty}t^{-1}L(t)dt\lt \infty$. We prove the existence of a positive solution $u$ such that $u(x)\approx{(1+|x|)}^{-\widetilde{\lambda}}\widetilde{L}(1+|x|) \quad\text{for}\quad x\in \mathbb{R}^{n},$ with $\widetilde{\lambda}:=\min(n-2m,\frac{\lambda-2m}{1-\alpha})$ and a function $\widetilde{L}$, given explicitly in terms of $L$ and satisfying the same condition at infinity. (Given positive functions $f$ and $g$ on $\mathbb{R}^{n}$, $f\approx g$ means that $c^{-1}g\leq f\leq cg$ for some constant $c\gt 1$.)
Access status: Open Access ,
Towards data integration and analysis in the detection of terrain surface deformation in the case of the Inowrocław salt dome
(2015) Szczerbowski, Zbigniew; Piątkowska, Anna
Długookresowe obserwacje przemieszczeń powierzchni terenu pozwoliły na wyznaczenie lokalnego trendu zarówno w dźwiganiu, jak i osiadaniu terenu na skutek eksploatacji górniczej oraz geologicznych procesów związanych ze strukturą solną Inowrocławia. Pomiary geodezyjne objęły dużą liczbę punktów sieci geodezyjnej, co dostarczyło wprawdzie szczegółowych, lecz ograniczonych do niewielkiej powierzchni terenu informacji o przemieszczeniach pionowych. Zastosowanie satelitarnej interferometrii radarowej (InSAR) pozwoliło na poszerzenie zakresu przestrzennego badanych przemieszczeń (wyznaczonych również z zastosowaniem precyzyjnej niwelacji geometrycznej), co umożliwiło wyznaczenie deformacji w wymiarze regionalnym. Zaprezentowano połączenie wyników wyznaczonych przy zastosowaniu niwelacji oraz techniki PS InSAR, które umożliwiły zamodelowanie badanych przemieszczeń. Ze względu na możliwości obu narzędzi pomiarowych podejście to okazało się właściwe.
Access status: Open Access ,
Notes on the nonlinear dependence of a multiscale coupled system with respect to the interface
(2015) Morales, Fernando A.
This work studies the dependence of the solution with respect to interface geometric perturbations, in a multiscaled coupled Darcy flow system in direct variational formulation. A set of admissible perturbation functions and a sense of convergence is presented, as well as sufficient conditions on the forcing terms, in order to conclude strong convergence statements. For the rate of convergence of the solutions we start solving completely the one dimensional case, using orthogonal decompositions on the appropriate subspaces. Finally, the rate of convergence question is analyzed in a simple multi dimensional setting, by studying the nonlinear operators introduced due to the geometric perturbations.
Access status: Open Access ,
Preparation and characterization of azobenzene-smectite photoactive mineral nanomaterials
(Wydawnictwa AGH, 2015) Koteja, Anna; Matusik, Jakub
Smectites are 2:1 layered minerals built of one octahedral sheet located between two tetrahedral sheets. The layer charge derived from the isomorphic substitutions in the mineral structure is compensated by the interlayer cations.
Access status: Open Access ,
The paired-domination and the upper paired-domination numbers of graphs
(2015) Ulatowski, Włodzimierz
In this paper we continue the study of paired-domination in graphs. A paired–dominating set, abbreviated PDS, of a graph $G$ with no isolated vertex is a dominating set of vertices whose induced subgraph has a perfect matching. The paired–domination number of $G$, denoted by $\gamma_{p}(G)$, is the minimum cardinality of a PDS of $G$. The upper paired–domination number of $G$, denoted by $\Gamma_{p}(G)$, is the maximum cardinality of a minimal PDS of $G$. Let $G$ be a connected graph of order $n\geq 3$. Haynes and Slater in [Paired-domination in graphs, Networks 32 (1998), 199–206], showed that $\gamma_{p}(G)\leq n-1$ and they determine the extremal graphs $G$ achieving this bound. In this paper we obtain analogous results for $\Gamma_{p}(G)$. Dorbec, Henning and McCoy in [Upper total domination versus upper paired-domination, Questiones Mathematicae 30 (2007), 1–12] determine $\Gamma_{p}(P_n)$, instead in this paper we determine $\Gamma_{p}(C_n)$. Moreover, we describe some families of graphs $G$ for which the equality $\gamma_{p}(G)=\Gamma_{p}(G)$ holds.
Access status: Open Access ,
A note on M2-edge colorings of graphs
(2015) Czap, Július
An edge coloring $\varphi$ of a graph $G$ is called an $M_2$-edge coloring if $|\varphi(v)|\le2$ for every vertex $v$ of $G$, where $\varphi(v)$ is the set of colors of edges incident with $v$. Let $K_{2}(G)$ denote the maximum number of colors used in an $M_2$-edge coloring of $G$. Let $G_1$, $G_2$ and $G_3$ be graphs such that $G_1\subseteq G_2\subseteq G_3$. In this paper we deal with the following question: Assuming that $K_2(G_1)=K_2(G_3)$, does it hold $K_2(G_1)=K_2(G_2)=K_2(G_3)$?
Access status: Open Access ,
Optimal consumption problem in the Vasicek model
(2015) Trybuła, Jakub
We consider the problem of an optimal consumption strategy on the infinite time horizon based on the hyperbolic absolute risk aversion utility when the interest rate is an Ornstein-Uhlenbeck process. Using the method of subsolution and supersolution we obtain the existence of solutions of the dynamic programming equation. We illustrate the paper with a numerical example of the optimal consumption strategy and the value function.