bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prediction of penetration rate of rotary-percussive drilling using artificial neural networks – a case study / Prognozowanie postępu wiercenia przy użyciu wiertła udarowo-obrotowego przy wykorzystaniu sztucznych sieci neuronowych – studium przypadku
Authors: Aalizad Seyed Ali , Rashidinejad Farshad 
Published: February 2013

Abstract
Penetration rate in rocks is one of the most important parameters of determination of drilling economics. Total drilling costs can be determined by predicting the penetration rate and utilized for mine planning. The factors which affect penetration rate are exceedingly numerous and certainly are not completely understood. For the prediction of penetration rate in rotary-percussive drilling, four types of rocks in Sangan mine have been chosen. Sangan is situated in Khorasan-Razavi province in Northeastern Iran. The selected parameters affect penetration rate is divided in three categories: rock properties, drilling condition and drilling pattern. The rock properties are: density, rock quality designation (RQD), uni-axial compressive strength, Brazilian tensile strength, porosity, Mohs hardness, Young modulus, P-wave velocity. Drilling condition parameters are: percussion, rotation, feed (thrust load) and flushing pressure; and parameters for drilling pattern are: blasthole diameter and length. Rock properties were determined in the laboratory, and drilling condition and drilling pattern were determined in the field. For create a correlation between penetration rate and rock properties, drilling condition and drilling pattern, artificial neural networks (ANN) were used. For this purpose, 102 blastholes were observed and drilling condition, drilling pattern and time of drilling in each blasthole were recorded. To obtain a correlation between this data and prediction of penetration rate, MATLAB software was used. To train the pattern of ANN, 77 data has been used and 25 of them found for testing the pattern. Performance of ANN models was assessed through the root mean square error (RMSE) and correlation coefficient (R2). For optimized model (14-14-10-1) RMSE and R2 is 0.1865 and 86%, respectively, and its sensitivity analysis showed that there is a strong correlation between penetration rate and RQD, rotation and blasthole diameter. High correlation coefficient and low root mean square error of these models showed that the ANN is a suitable tool for penetration rate prediction.
Influence of the Field of Aerodynamic Potentials and Surroundings of Goaf on Methane Hazard in Longwall N-12 In Seam 329/1, 329/1-2 in “Krupiński” Coal Mine / Wpływ Pola Potencjałów Aerodynamicznych Oraz Otoczenia Zrobów Na Zagrożenie Metanowe W Ścianie N-12 W Pokładzie 329/1, 329/1-2 W Kwk „Krupiński”
Authors: Dziurzyński Wacław , Krause Eugeniusz 
Published: February 2013

Abstract
Designing exploitation in seams in surroundings of strongly methane bearing seam assumes particular importance in conditions of the growing concentration of output. While planning exploitation, calculations results of predictions of methane emission to longwalls form a basis for selection of a mode of ventilation scope of utilized prevention, including methane drainage, as well as planned volume of coal output.
Performed in the article, systematic analysis of methane hazard in longwall N-12 in seam 329/1, 329/1-2 in ‘Krupiński’ Coal Mine, in which on 5.05.2011 took place methane ignition, allowed to determine factors forming methane hazard in this longwall while taking into consideration location of longwall parcel relative to previous mining in this seam. Occurring discrepancies between total amount of methane emitted to longwall N-12 and forecast value indicate circumstances of additional inflow of methane from outside of its environment. Confirmation of such methane flow are results of calculations of distribution of the field of aerodynamic potentials in workings contouring mined out longwall N-14 and mining of longwall N-12, as well as, being a relevant particularity, results of methane bearing determination on coal pillar separating post-exploitation goaf of both longwalls. The article emphasizes the necessity of taking into account, at the stage of designing longwalls, ventilation conditions and the influence of the field of aerodynamic potentials on the possibility of goaf gases flow which may contribute to the increase of methane hazard.
Reflective Practise at Prague College
Authors: Buehler Jeffrey 
Published: February 2013

1.
Prague College aspired in its first tentative steps into higher and further education to create the right conditions for learning by providing the required resources, qualified academic faculty, and sound administrative systems. Over its short existence the college did in this way achieve a certain level of stability and experience as an institution. Nevertheless, despite achieving some success at providing students with an education, it became less clear why the same problems consistently cropped up, in repeating patterns that confounded the many patchwork solutions provided.
The aim of this paper is to summarise the work done in the dissertation Assessing the Potential for Reflective practise within a College-wide Professional Development Strategy (Buehler, 2011). Based on this research, the paper will explore how the Prague College faculty, and in particular its leaders, would view reflective practise as a tool for self and organisational learning, and what its role might be within a new strategy for professional development. The research drew on both articu­lated and observed communication as it sought to answer the following questions in relation to the topic:
To what degree is reflective practise already actively present in the college systems and processes?
2. How is it currently understood and practised by faculty at the college?
3. What are the attitudes of the faculty towards the introduction of reflective practise?
4. What is most needed in terms of formal reflective practise?
5. What are the leadership and management considerations, including national cultural, that hinge on ef­fective implementation of a new professional development strategy, and how might these considerations inform the strategy?
Using Concatenated Steganography for Visual Analysis in GIS SOA
Authors: Yershov Andrew , Zabiniako Vitaly , Semenchuk Pavel 
Published: February 2013

Abstract
Geographic Information Systems (GIS) perform the computational processing of geographic data and store the geometry and the attributes of data that are geo-referenced, that is, situated on the earth surface and represented in a cartographic projection. Integral part of GIS functionality is an opportunity to make a complex analysis, which is able to integrate geo-referenced imagery as data layers or themes and link them to other data sets producing geospatial renderings of data. Based on Service-Oriented Architecture (SOA) GIS expose its capabilities as Web services with purpose to create a flexible and extensible GIS that can quickly respond to changing and future organizational needs. In that case client’s application sends specially formed requests to the GIS services and ensures visual processing of responses. But the drawback is the count of such requests, because imaginary data and data needed for analysis are received sequentially (not simultaneously). The purpose of this paper is to present the solution of decreasing the amount of geo-requests, enabling extensions to existing GIS visual analysis tools and bringing into GIS SOA synchronization mechanism designed on principles of concatenated steganography. This ensures that various geospatial data streams will be kept, transmitted and analytically processed together using concatenated steganography, strongly taking into account mutual relations between these streams.
Two-Grid Finite-Element Method for the Two-Dimensional Time-Dependent Schrödinger Equation
Authors: Zhang Hongmei , Jin Jicheng , Wang Jianyun 
Published: February 2013

AbstractIn this paper, we construct semi-discrete two-grid finite element schemes and full-discrete two-grid finite element schemes for the two-dimensional time-dependent Schrödinger equation. The semi-discrete schemes are proved to be convergent with an optimal convergence order and the full-discrete schemes, verified by a numerical example, work well and are more efficient than the standard finite element method.
Risk Factors for Falls in Adults With Rheumatoid Arthritis: A Prospective Study
Authors: Stanmore Emma K. , Oldham Jackie , Skelton Dawn A. , O'Neill Terence , Pilling Mark , Campbell A. John , Todd Chris 
Published: February 2013

ObjectiveTo investigate the association between potential risk factors and falls in community‐dwelling adults with rheumatoid arthritis (RA).MethodsWe followed patients for 1 year of followup in a prospective cohort study with monthly falls calendars and telephone calls. Lower extremity muscle strength, postural stability, number of swollen and tender joints, functional status, history of falling, fear of falling, pain, fatigue, medication, and use of steroids were assessed as risk factors for falls.ResultsA total of 386 women and 173 men with RA (n = 559) ages 18–88 years completed baseline assessments and 535 participants (96%) completed 1‐year followup. Bivariate logistic regression showed that falls risk was not associated with age or sex. Multivariate logistic regression revealed that a history of multiple falls in the previous 12 months was the most significant predictive risk factor (odds ratio [OR] 5.3, 95% confidence interval [95% CI] 2.3–12.3). The most significant modifiable risk factors were swollen and tender lower extremity joints (OR 1.7, 95% CI 1.1–2.7), psychotropic medication (OR 1.8, 95% CI 1.1–3.1), and fatigue (OR 1.13, 95% CI 1.02–1.2).ConclusionAdults with RA are at high risk of falls. In clinical practice, high‐risk fall patients with RA can be identified by asking whether patients have fallen in the past year. Important risk factors highlighted in this study include swollen and tender lower extremity joints, fatigue, and use of psychotropic medications.
Thermal Characterization of Test Techniques for FinFET and 3D Integrated Circuits
Authors: Tang Aoxiang , Jha Niraj K. 
Published: February 2013

Power consumption has become a very important consideration during integrated circuit (IC) design and test. During test, it can far exceed the values reached during normal operation and, thus, lead to temperatures above the allowed threshold. Without appropriate temperature reduction, permanent damage may be caused to the IC or invalid test results may be obtained. FinFET is a double-gate field-effect transistor (DG-FET) that was introduced commercially in 2012. Due to the vertical nature of FinFETs and, hence, weaker ability to dissipate heat, this problem is likely to get worse for FinFET circuits. Another technology rapidly gaining popularity is 3D IC integration. Unfortunately, the compact nature of a multidie 3D IC is likely to aggravate the temperature-during-test problem even further. Hence, before temperature-aware test methodologies can be developed, it is important to thermally analyze both FinFET and 3D circuits under test.
In this article, we present a methodology for thermal characterization of various test techniques, such as scan and built-in self-test (BIST), for FinFET and 3D ICs. FinFET thermal characterization makes use of a FinFET standard cell library that is characterized with the help of the University of Florida double-gate (UFDG) SPICE model. Thermal profiles for circuits under test are produced by ISAC2 from University of Colorado for FinFET circuits and HotSpot from University of Virginia for 3D ICs. Experimental results indicate that high temperatures result under BIST and much less often under scan, and that both power consumption and test application time should be reduced to lower the temperature of circuits under test, just reducing the power consumption is not enough.
David Jones and the Self-Conscious Uses of Tradition
Authors: Potter Martin 
Published: February 2013

Abstract
This paper will explore the way that the poetry of David Jones, while generally recognised as being modernist, nevertheless promotes a continuation of the Western literary tradition (as opposed to more revolutionary strands of modernism), but does this while introducing a self-conscious understanding of the role and workings of tradition, an element lacking in pre-modern traditional literature. Other figures with a similar interest in the viability of a self-consciously understood practice of (literary or philosophical) tradition, in continuity with pre-modern tradition, but in modern conditions (Thomas Mann, John Henry Newman, Alasdair MacIntyre), will also be discussed.
Lichen Biota Of The Wolin Island (Poland)
Authors: Wieczorek Anetta , Łysko Andrzej 
Published: February 2013

Abstract
A list of 232 taxa of lichenized and lichenicolous fungi was recorded within the Wolin island, especially, the Wolin National Park. The findings comprise the results of field studies conducted between 1996 and 2008 and those published in earlier works. Some of them are rare in the Polish lowlands.
Plant communities of the class Charetea Fukarek ex Krausch 1964 in Ukraine: an overview
Authors: Iakushenko Dmytro , Borysova Olena 
Published: February 2013

Abstract
The paper presents the results of the first syntaxonomical survey of the submerged plant communities belonging to the class of Charetea Fukarek ex Krausch 1964 in Ukraine based on the interpretation of about 80 published and unpublished phytosociological relevEs. Fourteen associations of two alliances and one order are characterized briefly. The diversity of charophyte communities in Ukraine is also described in brief. A preliminary prodromus of charophyte communities in Ukraine is given. Associations of Charetum intermediae (Corillion 1957) Fija≥kowski 1960, Charetum rudis Dπmbska 1966, Nitelletumgracilis Corillion 1957 are indicated for Ukraine for the first time.
Genotypic Markers of Yersinia Enterocolitica O:9 Isolated from Cows Positive in Serological Examination for Bovine Brucellosis
Authors: Weiner Marcin , Szulowski Krzysztof , Iwaniak Wojciech , Złotnicka Jolanta 
Published: February 2013

Abstract
The aim of the study was to perform a molecular investigations for the presence of pathogenicity genotypic markers of Y.
enterocolitica O:9 isolated from cattle, in which initially positive serological reactions for brucellosis were observed. Almost all isolates were ail-, ystA- and myfA-positive (n=19). On the other hand, one isolate, which harboured plasmid encoding gene yadA was ail- , ystA- and myfA-negative. The plasmid encoding yadA marker was present in half of the isolates tested. None of the examined isolates was ystB-positive. The results of the investigations revealed that the Y. enterocolitica O:9 isolates, related to false positive serological results for brucellosis, may be also potentially pathogenic for humans, due to the presence of chromosomal and plasmidencoded molecular markers.
Impact of the Priobiotic on the Presence of Selected Virulence Genes and Drug-Resistance Among Campylobacter Coli Isolated from Piglets
Authors: Selwet Marek , Galbas Mariola 
Published: February 2013

Abstract
The investigations comprised 100 piglets of crossbreed Polish Landrace x Large White Polish breed. Faeces samples were collected on the 2nd d of piglets’ life (control). On the 5th d of life of the piglets, probiotic paste was applied and 7 d later, faecal samples were collected again. The material included 100 isolates of Campylobacter sp. obtained from healthy piglets. All isolates were assigned to the Campylobacter coli species. The occurrence of virulence genes was determined by the PCR method. Drugresistance of the obtained isolates was determined using diffusion tests and E-test strips. All isolates deriving from the control group piglets were found to contain the cadF gene responsible for adhesion, as well as, gene flaA influencing motility of the examined bacteria. In piglets fed diets supplemented with probiotics, the cadF gene occurred in 100% isolates and gene flaA - in 99% isolates. Campylobacter coli isolates obtained from piglets from the control group exhibited the highest resistance with respect to ciprofloxacin and enrofloxacin. The similar results were recorded in the case of isolates obtained after the probiotic application. The majority of the isolates generated α type haemolysis (91%-92%). No significant differences were recorded in the capability of generating haemolysis between isolates obtained before probiotic administration and the isolates obtained after the application of the experimental probiotic.
Postwar creations of strangers and estrangement: Notes on the ways to recovery and normalization
Authors: Bańka Augustyn 
Published: February 2013

Abstract
This paper is an attempt at exploring the phenomenon of creation of strangers and estrangement as post-war trauma effects. It starts with an observation that post-war is a mental state manifesting itself in individuals as estrangement from themselves, environment, other people, and from the very meaning of life. The post-war trauma triggers a tendency for recovery and normalization of life, which, however, never ends. The paper focuses mainly on four aspects. Firstly, critical moments of the evolution of post-war periods in Europe are discussed, starting with the end of war until now. Secondly, the evolution of change in mental moral grammar in specific post-war periods is looked upon. Thirdly, paths to recovery and normalization through the creation of strangers and estrangement in consecutive, critical post-war periods are indicated. Lastly, this paper tries to present the paradoxes of all the periods of the post-war syndrome.
Digital dermoscopy analysis in the diagnosis of acral and nail melanocytic tumors / Digitalna dermoskopija u dijagnozi melanocitnih tumora noktiju i akralnih delova tela
Authors: Dobrosavljević Danijela D. , Brašanac Dimitrije , Lukić Silvana , Medenica Ljiljana 
Published: February 2013

Abstract
Digital dermoscopy (epiluminiscence microscopy) is a technology for in vivo imaging of the skin used for the differentiation of pigmented skin lesions. Melanocytic tumors and pigmentations of the nails and acral skin regions represent differential diagnostic problems that can hardly be evaluated with the naked eye, especially at an early stage. Two patients with a total of three very suspicious lesions underwent dermoscopy. Clinical diagnoses were as follows: subungual hemorrhage, plantar wart (previously treated as a plantar wart several times) and acral melanoma. Dermoscopy increased the suspicion to: subungual melanoma, acral amelanotic melanoma and acral nevus, respectively. Histologic examination has verified the following diagnoses: subungual melanoma, acral lentiginous melanoma and acral junctional nevus. Dermoscopic examination of pigmented structures on the above-mentioned sites is a very useful adjunct in establishing accurate diagnosis that can help in differentiating benign from malignant lesions.
Selection of ore transport system for a metalliferous underground mine / Dobór systemu transportu rud w kopalni podziemnej rud metalu
Authors: Gonen Alper , Malli Tahir , Kose Halil 
Published: February 2013

Abstract
The conditions of increasing competition in today’s mining industry, deepening of mines and also decreasing ore reserve and quality parameters (grade, calorie, ppm, etc.) compels to reduce unit cost for maximum benefit. In this context, optimization of machinery and equipment in technical and economical sense is required in terms of economic mining. In underground mining, as ore transport operation significantly affects profitability, optimization of the system gains importance technically and economically. In this paper, the authors studied production capacities up to 1,000,000 ton/year and orebody depths up to 1,000 m according to different haulage systems; conventional shaft hoisting, declined mine truck haulage and flexowell vertical belt applications. In model study, unit transport costs of each alternative depending on the production capacity and mine depth have been calculated.
Analiza mechaniki procesu rozdrabniania surowców mineralnych w kruszarkach i wysokociśnieniowych prasach walcowych
Authors: Bromowicz Jan , Figarska-Warchoł Beata 
Published: February 2013

Streszczenie
W artykule przeanalizowano opisy procesu rozdrabniania przy użyciu różnych teorii. Scharakteryzowano pokrótce teorię stanów granicznych, teorię sprężystości oraz teorię plastyczności dla wyjaśnienia niektórych efektów obserwowanych w procesie rozdrabniania materiałów kruchych. Bardziej szczegółowo opisano zja­wiska występujące przy rozdrabnianiu w wysokociśnieniowych prasach walcowych, przeanalizowano wpływ wybranych czynników na wyniki rozdrabniania. Ocenę przydatności różnych hipotez do interpretacji procesu rozdrabniania w wysokociśnieniowych prasach walcowych przeprowadzono na podstawie badań ekspery­mentalnych.
Przedstawiono wyniki prób ściskania wapienia w warunkach podobnych do istniejących przy rozdrabnia­niu w prasach walcowych. Kruszywo wapienne umieszczone w stalowym cylindrze poddawano ściskaniu poprzez stempel prasy hydraulicznej. Ściskano próbki o różnym uziarnieniu kruszywa i przy różnej wielkości ciśnienia. Oprócz wpływu wielkości ciśnienia prasowania stwierdzono wpływ uziarnienia nadawy na efekt rozdrabniania. Porównanie otrzymanych wyników wskazuje na duże możliwości regulacji parametrów pracy pras walcowych.
Możliwości sejsmicznej identyfikacji stref akumulacji gazu w utworach węglanowych cechsztynu monokliny przedsudeckiej
Authors: Dec Jerzy , Pietsch Kaja 
Published: February 2013

Streszczenie
Na obszarze monokliny przedsudeckiej złoża gazu występują w utworach węglanowych cyklotemów PZ1 (w wapieniu podstawowym Cal) oraz PZ2 (w dolomicie głównym Ca2). Lokalizacja złóż jest ściśle związana ze strefami sedymentacji węglanów. Złoża występują przede wszystkim w obrębie stref barierowych oraz stref podnóża platform węglanowych. Wyrzut do chodnika rozdrobnionego materiału skalnego w KGHM ZG Rudna, który miał miejsce w 2009 r. pokazał, że gaz może występować również w strefie basenowej Cal, z którą związane jest złoże miedzi.
Podstawową metodą badawczą wykorzystywaną do lokalizacji złóż węglowodorów są powierzchniowe badania sejsmiczne 2D i 3D. Ich sukcesy poszukiwawcze wynikają przede wszystkim z faktu zmniejszania się prędkości rozchodzenia się fal P oraz gęstości objętościowej pod wpływem nasycenia przestrzeni porowej gazem. Na skutek tego w rejestrowanym zapisie sejsmicznym widoczne są strefy zapisu anomalnego. Ich powiązanie ze złożami gazu, czyli złożowa interpretacja danych sejsmicznych, oparta jest na analizie DHI (Direct Hydrocarbon Indicator).
W prezentowanej pracy przedstawiono i porównano sejsmiczne odwzorowanie nasycenia gazem „pułapek” zlokalizowanych w typowej barierze węglanowej (złoże Kościan w Cal), w strefie podnóża platformy węglanowej (złoże Lubiatów w Ca2) oraz porowatej/szczelinowatej strefie dolomitu Cal w rejonie wyrzutu gazu, który miał miejsce w KGHM ZG Rudna.
Dla każdej ze stref opracowano, bazując na rejestrowanych danych geofizyki otworowej i modelowaniach 1D (sejsmogramy syntetyczne), kryteria identyfikacji stref nasyconych gazem.
Podstawowym kryterium wskazującym na nasycenie (1) bariery Kościan (Cal) jest zmiana fazy refleksu (phase change) wiązanego ze spągiem Cal przy przejściu ze strefy basenowej (refleks ujemny) do strefy barierowej (refleks dodatni), (2) złoża Lubiatów, zlokalizowanego w obszarze podnóża platformy jest występowanie w stropie strefy nasyconej silnego refleksu ujemnego (bright spot), (3) porowatej i szczelinowej strefy głębokowodnej w ZG Rudna - występowanie w spągu dolomitów Cal refleksu o amplitudzie zbliżonej do zera.
Opracowane kryteria są kryteriami lokalnymi, zbyt duża jest bowiem zmienność budowy geologicznej w różnych częściach basenu cechsztyńskiego.