bluuebunny/crossref_metadata_2025 huggingface dataset:
Learning Maths The Fun Way With Magic Maths
Authors: A/l Munandy Selvaraju
Published: February 2017

Mathemagics or ‘Magic Maths’ consists of a series of non-conventional maths formulas that turn Mathematics into a fun subject and create innovative minds. The magical system could help steer the country towards a knowledge economy. The magic formulas, based on Ancient Indian Scriptures, were in use by the United States National Aeronautics and Space Administration (NASA), Intel Corporation, Microsoft, IBM and India, for its competitive exams preparations. The high speed mental mathematics could speed up math calculation by up to 1500 % and turn students into human bio-calculators. Mathemagics presents varieties of methods which can be used according to one’s needs in solving even the most difficult math problems. This is unlike the conventional system consisting of rigid, sometimes monotonous, procedures that are uniformly applied to all problems of a given type. The conventional method of calculation was not user – friendly with hardly any room for choice and experimentation. A seemingly difficult calculation like 998 x 997 can be solved in less than five seconds and even mentally. There is also a unique method to check the accuracy of answers to addition, subtraction, multiplication and division, in keeping with the basic needs of students for faster calculations with 100 % accuracy. Innovation of the formula would make students become more confident and gain self – esteem while cultivating an interest for numbers and help eliminate math – phobia in them. The system also opens a new horizon for mathematics lovers as it presents a wider platform for experimentation in the subject. Besides, it promotes development of the right brain which governs the ability to solve complex calculations that require the use of visualization, photographic memory, speed reading and sub-conscious learning together with the left – brain that is employed by students for 90 % of subjects taught at school.
Impact of Informal Workplace Learning on Job Satisfaction
Authors: Mohd Sukor Mohammad Saipol , Mad Shah Ishak , Sam Ruai Malissa Koammapat
Published: February 2017

In order to remain competitive in the global economy, many employers emphasized lifelong learning on their workers. But most of them focused on formal learning and tend to overlook the informal learning in the workplace. Current evidence suggests that informal learning is far more important for skill development and predict employees’ behavior in the workplace. Therefore, this study takes into account the impact of informal workplace learning on employees’ job satisfaction. Samples of the study were 197 property executives. Instruments used in this study were Small Business Workplace Learning Survey (SBWLS) and Job Satisfaction Survey (JSS). Result shows that there was a significant positive impact of informal workplace learning on the job satisfaction. Further analysis concluded that all three components of informal workplace learning such as past episode, current experience and future behavior were positively significant predictors of job satisfaction among property executives. Some limitations and recommendations for future research were discussed in this article. For overall, this study provided full support for the predictive role of informal workplace learning towards employees’ job satisfaction especially in property consulting firms.
Haematological and electrophoretic characterisation of β-thalassaemia in Yunnan province of Southwestern China
Authors: Zhang Jie , He Jing , Mao Xiaoqin , Zeng Xiaohong , Chen Hong , Su Jie , Zhu Baosheng
Published: February 2017

Objectives

β-Thalassaemia is widely found in Southwestern China. Characterisation of β-thalassaemia can improve screening and prenatal diagnosis for at-risk populations.

Design

A retrospective study.

Methods

In this study, the levels of haemoglobin alpha 2 (HbA2) and haemoglobin alpha (HbA) were analysed by gender for a total of 15 067 subjects screened by capillary electrophoresis. The cut-off value with the highest accuracy was established to identify β-thalassaemia in 723 patients suspected to have this disease. Haematological and electrophoretic characterisation of eight common types of β-thalassaemia were analysed in 486 β-thalassaemia subjects.

Results

HbA levels were significantly higher in men than in women, but there was no significant difference on HbA2levels. A new cut-off value for the diagnosis of β-thalassaemia (HbA2≥4.0%) with the highest accuracy was proposed for the studied populations. Haemoglobin (Hb) was significantly higher in men compared with women (p<0.05), whereas no statistically significant differences were found for mean cell volume (MCV), mean cell haemoglobin (MCH), HbA and HbA2. The haemoglobin E (HbE) group showed comparatively higher values for haematological indices (Hb, MCV and MCH) than the other genotypes in heterozygous β-thalassaemia groups (p<0.05), and −28 (A>G) (HBB (β-globin):c.−78A>C) had signiﬁcantly higher HbA2values compared with other β-thalassaemia.

Conclusions

Ethnic groups have diversified β-globin gene mutations and considerable haematological variations. Our study will lay the foundation for screening programmes and clinical management of thalassaemia in Southwestern China.
A multicenter study of the safety and effectiveness of mechanical thrombectomy for patients with acute ischemic stroke not meeting top-tier evidence criteria
Authors: Goyal Nitin , Tsivgoulis Georgios , Frei Donald , Turk Aquilla , Baxter Blaise , Froehler Michael T , Mocco J , Vachhani Jay , Hoit Daniel , Elijovich Lucas , Loy David , Turner Raymond D , Mascitelli Justin , Espaillat Kiersten , Alexandrov Andrei V , Alexandrov Anne W , Arthur Adam S
Published: February 2017

Background

While mechanical thrombectomy (MT) has become the standard of care for patients with acute ischemic stroke (AIS) with emergent large-vessel occlusions (ELVO), recently published guidelines appropriately award top-tier evidence to the same selective criteria that were employed in completed clinical trials. We sought to evaluate the safety and effectiveness of MT in patients with AIS with ELVO who do not meet top-tier evidence criteria (TTEC).

Methods

We conducted an observational study on consecutive patients with AIS with ELVO who underwent MT at six high-volume endovascular centers. Standard safety outcomes (3-month mortality, symptomatic intracranial hemorrhage) and effectiveness outcomes (3-month functional independence: modified Rankin Scale scores of 0–2) were compared between patients meeting and failing TTEC.

Results

The sample consisted of 349 (60%) controls fulfilling TTEC and 234 (40%) non-TTEC patients. Control patients meeting TTEC for MT tended to have higher functional independence rates at 3 months (47% vs 39%; p=0.055), while the rates of symptomatic intracerebral hemorrhage (sICH) were similar (9%) in both groups (p=0.983). In multivariable logistic regression models, adherence to TTEC for MT was not independently related to any safety outcome (sICH: OR 0.71, 95% CI 0.30 to 1.68, p=0.434; 3-month mortality: OR 1.27, 95% CI 0.69 to 2.33, p=0.448) or effectiveness outcome (3-month functional independence: OR 0.81, 95% CI 0.48 to 1.37, p=0.434; 3-month functional improvement: OR 0.73, 95% CI 0.48 to 1.11, p=0.138) after adjusting for potential confounders.

Conclusions

Approximately 40% of patients with AIS with ELVO offered MT do not fulfill TTEC for MT. Patients who did not meet TTEC had high rates of good clinical outcome and low complication rates.
Dijkgraaf–Witten type invariants of Seifert surfaces in 3-manifolds
Authors: Lee I. J. , Yetter D. N.
Published: February 2017

We introduce defects, with internal gauge symmetries, on a knot and Seifert surface to a knot into the combinatorial construction of finite gauge-group Dijkgraaf–Witten theory. The appropriate initial data for the construction are certain three object categories, with coefficients satisfying a partially degenerate cocycle condition.
A Logical Approach to Experience-Based Reasoning
Authors: Sun Zhaohao
Published: February 2017

Experience-based reasoning (EBR) is a paradigm used in almost every human activity as a part of human reasoning. However, EBR has not been seriously studied from a logical viewpoint. This paper will attempt to fill this gap by providing a unified logical approach to EBR. More specifically, this paper first examines EBR and inference rules. Then it proposes eight different rules of inference for EBR, which cover all possible EBRs from a logical viewpoint. These eight different rules of inference constitute the fundamentals for all EBR paradigms, and therefore will be the theoretical foundation for EBR. The proposed approach will facilitate research and development of EBR, human reasoning, and common sense reasoning.
SWARM: A 32 GHz Correlator and VLBI Beamformer for the Submillimeter Array
Authors: Primiani Rurik A. , Young Kenneth H. , Young André , Patel Nimesh , Wilson Robert W. , Vertatschitsch Laura , Chitwood Billie B. , Srinivasan Ranjani , MacMahon David , Weintroub Jonathan
Published: February 2017

A 32[Formula: see text]GHz bandwidth VLBI capable correlator and phased array has been designed and deployed a at the Smithsonian Astrophysical Observatory’s Submillimeter Array (SMA). The SMA Wideband Astronomical ROACH2 Machine (SWARM) integrates two instruments: a correlator with 140[Formula: see text]kHz spectral resolution across its full 32[Formula: see text]GHz band, used for connected interferometric observations, and a phased array summer used when the SMA participates as a station in the Event Horizon Telescope (EHT) very long baseline interferometry (VLBI) array. For each SWARM quadrant, Reconfigurable Open Architecture Computing Hardware (ROACH2) units shared under open-source from the Collaboration for Astronomy Signal Processing and Electronics Research (CASPER) are equipped with a pair of ultra-fast analog-to-digital converters (ADCs), a field programmable gate array (FPGA) processor, and eight 10 Gigabit Ethernet (GbE) ports. A VLBI data recorder interface designated the SWARM digital back end, or SDBE, is implemented with a ninth ROACH2 per quadrant, feeding four Mark6 VLBI recorders with an aggregate recording rate of 64 Gbps. This paper describes the design and implementation of SWARM, as well as its deployment at SMA with reference to verification and science data.
Multi-Level Pre-Correlation RFI Flagging for Real-Time Implementation on UniBoard
Authors: Dumez-Viou Cédric , Weber Rodolphe , Ravier Philippe
Published: February 2017

Because of the denser active use of the spectrum, and because of radio telescopes higher sensitivity, radio frequency interference (RFI) mitigation has become a sensitive topic for current and future radio telescope designs. Even if quite sophisticated approaches have been proposed in the recent years, the majority of RFI mitigation operational procedures are based on post-correlation corrupted data flagging. Moreover, given the huge amount of data delivered by current and next generation radio telescopes, all these RFI detection procedures have to be at least automatic and, if possible, real-time. In this paper, the implementation of a real-time pre-correlation RFI detection and flagging procedure into generic high-performance computing platforms based on field programmable gate arrays (FPGA) is described, simulated and tested. One of these boards, UniBoard, developed under a Joint Research Activity in the RadioNet FP7 European programme is based on eight FPGAs interconnected by a high speed transceiver mesh. It provides up to 4 TMACs with ®Altera Stratix IV FPGA and 160 Gbps data rate for the input data stream. The proposed concept is to continuously monitor the data quality at different stages in the digital preprocessing pipeline between the antennas and the correlator, at the station level and the core level. In this way, the detectors are applied at stages where different time–frequency resolutions can be achieved and where the interference-to-noise ratio (INR) is maximum right before any dilution of RFI characteristics by subsequent channelizations or signal recombinations. The detection decisions could be linked to a RFI statistics database or could be attached to the data for later stage flagging. Considering the high in–out data rate in the pre-correlation stages, only real-time and go-through detectors (i.e. no iterative processing) can be implemented. In this paper, a real-time and adaptive detection scheme is described. An ongoing case study has been set up with the Electronic Multi-Beam Radio Astronomy Concept (EMBRACE) radio telescope facility at Nançay Observatory. The objective is to evaluate the performances of this concept in term of hardware complexity, detection efficiency and additional RFI metadata rate cost. The UniBoard implementation scheme is described.
Iris
Authors: Papagiannis Anastasios , Saloustros Giorgos , Marazakis Manolis , Bilas Angelos
Published: February 2017

System software overheads in the I/O path, including VFS and file system code, become more pronounced with emerging low-latency storage devices. Currently, these overheads constitute the main bottleneck in the I/O path and they limit efficiency of modern storage systems. In this paper we present a taxonomy of the current state-of-the-art systems on accelerating accesses to fast storage devices. Furthermore, we present Iris, a new I/O path for applications, that minimizes overheads from system software in the common I/O path. The main idea is the separation of the control and data planes. The control plane consists of an unmodified Linux kernel and is responsible for handling data plane initialization and the normal processing path through the kernel for non-file related operations. The data plane is a lightweight mechanism to provide direct access to storage devices with minimum overheads and without sacrificing strong protection semantics. Iris requires neither hardware support from the storage devices nor changes in user applications. We evaluate our early prototype and we find that it achieves on a single core up to 1:7x and 2:2x better read and write random IOPS, respectively, compared to the XFS and EXT4 file systems. It also scales with the number of cores; using 4 cores Iris achieves 1:84x and 1:96x better read and write random IOPS, respectively. In sequential reads we provide similar performance and in sequential writes we are about 20% better compared to other file systems.
Hybrid Method for Optimal Placement of Multiple SPV Based Multiple RDGs in Microgrid System
Authors: M. Dawoud Samir , Lin Xiangning , M. F. Flaih Firas , Kamil Mohsin Qasim
Published: February 2017

A hybrid method has been suggested for optimal placement of multiple renewable distribution generations (RDGs) in microgrid system. The analytical approaches have not been appropriated for optimal placements of multiple solar photovoltaic (SPV) based on RDGs alone. In this work, hybridization of a fuzzy method and particle swarm optimization (PSO) search for the optimal placement of multiple RDGs in microgrid systems for decreasing the active power loss has been proposed. In this approach, the sizes of RDGs are evaluated at every bus by PSO method while the locations are determined by fuzzy based technique. The objective function (OBF) has been minimized under operating constraints. The improvements in nodal voltage profile have been observed. To confirm the proposed hybrid approach, results have been compared with bat algorithm (BA) technique and existing fast improved analytical (IA) method results. The suggested technique has been tested on 33-bus and 69-bus microgrid system.
Clustering Techniques for Software Engineering
Authors: Barman Shohag , Gope Hira Lal , Manjurul Islam M M , Hasan Md Mehedi , Salma Umme
Published: February 2017

Software industries face a common problem which is the maintenance cost of industrial software systems. There are lots of reasons behind this problem. One of the possible reasons is the high maintenance cost due to lack of knowledge about understanding the software systems that are too large, and complex. Software clustering is an efficient technique to deal with such kind of problems that arise from the sheer size and complexity of large software systems. Day by day the size and complexity of industrial software systems are rapidly increasing. So, it will be a challenging task for managing software systems. Software clustering can be very helpful to understand the larger software system, decompose them into smaller and easy to maintenance. In this paper, we want to give research direction in the area of software clustering in order to develop efficient clustering techniques for software engineering. Besides, we want to describe the most recent clustering techniques and their strength as well as weakness. In addition, we propose genetic algorithm based software modularization clustering method. The result section demonstrated that proposed method can effectively produce good module structure and it outperforms the state of the art methods. 
Two Ways to Transfer a Bodily Right
Authors: Liberto Hallie
Published: February 2017

There are two ways to transfer a bodily right. One might transfer a bodily right in a detaching way – that is, without transferring jurisdiction over one’s future bodily choices. Alternately, one might transfer a bodily right in an attaching way – that is, in a way that transfers such jurisdiction. For instance, A might sell his kidney to B for money paid at the time of the transplant. Alternately, A might accept money now, agreeing to give up his kidney some time down the road. In the latter case and not the former, B acquires normative jurisdiction over A’s future bodily choices. In this paper I will argue that the distinction between attaching and detaching transfers of bodily rights has implications regarding whether certain contracts and agreements should be legally enforced – and whether problems arise when the moral and legal transferability of these rights comes apart.
The sedimentology of the modern lagoons in the Western Peloponnesus
Authors: Kontopoulos N. , Bouzos N.
Published: February 2017

The Gulfs across of the western Peloponnese are characterized by lagoons. These are located between promontories, in coastal areas where the tidal range is very low. The studied lagoons are very shallow and the sandy mud lithology is the dominant type of the lagoonal bottom sediments. The main hydraulic mechanism for the distribution of the bottom sediments is the winnowing effect by wind action. Further, the studied sediments are characterized as very poorly to extremely poorly sorted and, therefore, the lagoonal environment is one of a very low energy. In this environment the velocity of the depositional agent either fluctuates wide or presents greater consistency. In the bottom sediments, the carbonate and organic material are mostly clastic with an average value of about 35% and 3% respectively. The presence of an abundant clay fraction in the lagoonal sediments allows the precipitation of organic carbon. The latter should be always evaluated when solution to environmental problems is required.
Μετάφραση και κουλτούρα: η πολιτισμική στροφή στη μεταφρασεολογία και ο ρόλος των νέων τεχνολογιών
Authors: Δημητρούλια Τιτίκα
Published: February 2017

Δεν διατίθεται περίληψη.
Η προβληματική του θεάτρου στη λογοτεχνία: Πιραντέλλο, Μπαλζάκ, Χόφμαν
Authors: Βερβεροπούλου Ζωή
Published: February 2017

Δε διατίθεται περίληψη
Νίκος Καζαντζάκης, Ο φτωχούλης του Θεού
Authors: Cappellaro Elena
Published: February 2017

[Δε διατίθεται περίληψη]
RESEARCH OF INFLUENCE OF TECHNOLOGY OF IMMERSION OF SHELLS OF SUNK WELLS IN THEIR MODE OF DEFORMATION
Authors: Кочерженко  , Kocherzhenko Vladimir , Погорелова  , Pogorelova Inna
Published: February 2017

оболочка опускного колодца, технология погружения, усилия, напряженно-деформированное состояние, свая, момент, радиус.
Influence of January 2009 stratospheric warming on HF radio wave propagation in the low-latitude ionosphere
Authors: Котова Дарья , Kotova Daria , Клименко Максим , Klimenko Maksim , Клименко Владимир , Klimenko Vladimir , Захаров Вениамин , Zakharov Veniamin , Бессараб Федор , Bessarab Fedor , Кореньков Юрий , Korenkov Yuriy
Published: February 2017

We have considered the influence of the January 23–27, 2009 sudden stratospheric warming (SSW) event on HF radio wave propagation in the equatorial ionosphere. This event took place during extremely low solar and geomagnetic activity. We use the simulation results obtained with the Global Self-consistent Model of the Thermosphere, Ionosphere and Protonosphere (GSM TIP) for simulating environmental changes during the SSW event. We both qualitatively and quantitatively reproduced total electron content disturbances obtained from global ground network receiver observations of GPS navigation satellite signals, by setting an additional electric potential and TIME-GCM model output at a height of 80 km. In order to study the influence of this SSW event on HF radio wave propagation and attenuation, we used the numerical model of radio wave propagation based on geometrical optics approximation. It is shown that the sudden stratospheric warming leads to radio signal attenuation and deterioration of radio communication in the daytime equatorial ionosphere.
Meta-analysis of gap balancingversusmeasured resection techniques in total knee arthroplasty
Authors: Huang T. , Long Y. , George D. , Wang W.
Published: February 2017

Aims

There are two techniques widely used to determine the rotational alignment of the components in total knee arthroplasty (TKA); gap balancing (GB) and measured resection (MR). Which technique is the best remains controversial. We aimed to investigate this in a systematic review and meta-analysis.

Materials and Methods

In accordance with the methods of Cochrane, databases were searched for all randomised controlled trials in the literature between January 1986 and June 2015 comparing radiographic and clinical outcomes between the use of these two tecniques. Meta-analysis involved the use of the Revman5.3 software provided by Cochrane collaboration.

Results

A total of 1464 papers were initially identified, and after the application of rigourous inclusion and exclusion critera, eight were included in the study. In total they inolved 980 TKAs. The meta-analysis showed that GB techniques resulted in statistically significant improvements in the restoration of mechanical and rotational alignment and mean Knee Society Scores and Knee Society Function scores two years post-operatively, but resulted in greater elevation of the position of the joint line. There is no significant difference in the other radiographic data.

Conclusion

This study suggests that GB may provide better radiographic and clinical outcomes than MR when used to determine mechanical rotation in TKAs. Cite this article: Bone Joint J 2017;99-B:151–8.
Long-term outcomes of transtrochanteric rotational osteotomy for non-traumatic osteonecrosis of the femoral head
Authors: Morita D. , Hasegawa Y. , Okura T. , Osawa Y. , Ishiguro N.
Published: February 2017

Aims

Transtrochanteric rotational osteotomy (TRO) is performed for young patients with non-traumatic osteonecrosis of the femoral head (ONFH) to preserve the hip. We aimed to investigate the long-term outcomes and the risk factors for failure 15 years after this procedure.

Patients and Methods

This study included 95 patients (111 hips) with a mean age of 40 years (21 to 64) who underwent TRO for ONFH. The mean follow-up was 18.2 years (3 to 26). Kaplan–Meier survivorship analyses were performed with conversion to total hip arthroplasty (THA) and radiological failure due to secondary collapse of the femoral head or osteoarthritic changes as the endpoint. Multivariate analyses were performed to assess risk factors for each outcome.

Results

Survival rates at 15 years with conversion to THA and radiological failure as the endpoint were 59% (95% confidence interval (CI) 49 to 67) and 30% (95% CI 22 to 39), respectively. Necrotic type C2 ONFH (lesions extending laterally to the acetabular edge) (hazards ratio (HR) 3.9) and age > 40 years (HR 2.5) were risk factors for conversion to THA. Stage > 3a ONFH (HR 2.0) and age > 40 years (HR 1.9) were risk factors for radiological failure.

Conclusion

The 15 year outcomes after TRO for ONFH are unfavorable because osteoarthritic changes occur after five years post-operatively. Cite this article: Bone Joint J 2017;99-B:175–83.
Discriminación genotípica de serovariedades del serogrupo Icterohaemorrhagiae pertenecientes a Leptospira interrogans (Spirochaetales: Leptospiraceae) y el análisis de distancias génicas mediante coordenadas principales
Authors: GRUNE LOFFLER Sylvia , MARTINEZ Mara L , ROMERO Graciela , BRIHUEGA Bibiana F.
Published: February 2017

La leptospirosis es una zoonosis de amplia distribución mundial y de importancia en salud pública y veterinaria. El serogrupo Icterohaemorrhagiae toma importancia, ya que ha sido aislado con frecuencia en roedores y en casos clínicos de humanos, caninos, bovinos y porcinos; y se ha logrado aislar a partir de agua del rio Reconquista, provincia de Buenos Aires, Argentina.  El objetivo de este estudio fue discriminar molecularmente entre las serovariedades Copenhageni e Icterohaemorrhagiae del serogrupo Icterohaemorrhagiae de importancia en Argentina,  utilizando  la técnica del análisis de repeticiones en tándem en múltiples locus (MLVA) y analizar las distancias génicas entre los genotipos determinados a partir de cepas aisladas de animales. Para ello, geno-tipificamos las 4 cepas referenciales del serogrupo Icterohaemorrhagiae de la especie Leptospira interrogans serovariedad Copenhageni cepa M20 y cepa Ictero I y  de la serovariedad Copenhageni cepa RGA y cepa Fiocruz L1-130. Para este estudio se incluyeron 24 cepas aisladas de animales domésticos como silvestres. Logramos mediante esta técnica determinar un código numérico para cada serovariedad y así pudimos discriminar entre las  serovariedades de este serogrupo. El análisis de coordenadas principales (PCoA) demostró la variabilidad génica existente entre las 4 cepas referenciales pertenecientes al serogrupo Icterohaemorrhagiae, el genotipo con mayor representación fue el serovar Copenhageni cepa Fiocruz L1-130 con un total de 13 cepas aisladas con ese perfil genético. Discriminar las serovariedades de este importante serogrupo nos permitirá en un futuro investigar si existen diferencias entre la sintomatología clínica y/o respuesta al tratamiento en los casos clínicos producidos por las distintas serovariedades del serogrupo Icterohaemorrhagiae discriminadas en este trabajo.
Responsabilidad civil en las relaciones de familia según el Código Civil y Comercial de la Nación
Authors: Gianfelici Florencia Romina
Published: February 2017

Responsabilidad civil en las relaciones de familiasegún el Código Civil y Comercial de la Nación
Distribution and conservation status of fishes reported from muntjibpur pond of Allahabad (U.P.)
Authors: Verma Ashok Kumar
Published: February 2017

Muntjibpur pond was studied to find out the conservation status of the fishes naturally occurring in it. The survey was conducted from July 2014 to June 2015. During exploration, a total of 13 species of fishes belonging to 12 genera, 8 families and 5 orders were identified. As per latest version of IUCN Red List, out of 13 species of fishes identified, 1 species comes under UV (vulnerable), 1 under NT (near threatened), 8 under LC (least concern) and 3 species are NE (not evaluated) so far. No fish species identified here comes under EN (endangered) category.
Solving the problem of two viscous
incompressible fluid media in the case of constant
phase saturations
Authors: Baishemirov Zharasbek , Tang Jian-Gang , Imomnazarov Kholmatzhon , Mamatqulov Musajon
Published: February 2017

The solution to equations of two viscous homogeneous
incompressible fluid media with the pressure
phase equilibrium in the case of a constant phase is obtained.
The influence of the physical phase densities, saturation,
volume and viscosity of substances constituting a
two-phase continuum in the flow velocity and pressure is
shown. Also, the solution admitting a limiting transition
to the known solution of the problem of a flow of a viscous
incompressible single-phase medium is constructed.
Uncertainty assessment based on scenarios derived from static connectivity metrics
Authors: Jakab Noémi
Published: February 2017

The approach presented in this paper characterises the uncertainty related to the outputs of a sequential Gaussian simulation. The input data set was a random subset of a complete CT slice. To outline possible, characteristically different groups of realisations within the outputs, we performed a distance-based classification of the realisations based on their derived connectivity features. Global metrics of connectivity also called geo-body or geoobject connectivity is derivative properties related to the overall structure of the simulated field. Based on these attributes stochastic images, which show the same characteristics from a statistical point of view become distinguishable. The scenarios generated this way are able to bridge the gap of information content between the individual stochastic images and the entirety of the pooled realisations. Scenarios are also capable of highlighting the groups of most probable outcomes from the realisations while screening the effect of ergodic fluctuations of the individual stochastic images. They yield a more realistic representation of the smaller scale heterogeneities than the individual stochastic images. In this sense, our approach is able to resolve the question of how many realisations to choose for the assessment of uncertainty. Besides, it eliminates subjectivity and supports reproducible decision-making when the task is to select stochastic images for dynamic simulation.
Melting Features and Viscosity of TiO2-Containing Primary Slag in a Blast Furnace
Authors: Jiao Kexin , Zhang Jianliang , Wang Zhiyu , Liu Yanxiang , Xu RenZe
Published: February 2017

The performance of the primary slag in the cohesive zone of blast furnace is critical for smooth operation of blast furnace ironmaking process. In the present work, the CaO–SiO2–MgO–TiO2–Al2O3–FeO slag system was studied to identify the influence of the FeO and the TiO2 on the melting features and viscosity. The temperatures of melting features are found to decrease with increasing FeO from 5 wt% to 20 wt% and increase with increasing TiO2 from 5 wt% to 15 wt%. The viscosities of the slag change with TiO2 can be divided into four periods, which are slow period, rapid period, slow down period and dramatically rise period. The introduction of TiO2 into silicate network performs as network modifier at high temperature and network former at a relative low temperature. FeO can decrease the effect of Ti2O6
4– chain units and decrease the precipitation temperature of the solid phase.
Russian Nationalists Fight Ukrainian War
Authors: Yudina Natalia
Published: February 2017

In this article, I am going to focus on how the radical nationalist movement in Russia fares in the current situation, given the political consolidation of the current regime, and the war in Ukraine1and the government’s reaction to it. The article describes the situation as it stood at the end of 2014, which makes it predictably incomprehensive because new updates on the conflict still arrive every day, and there has also been more news about Russian ultra-right forces over the past few months.
Asylum Seekers Crisis in Europe 2015: Debating Spaces of Fear and Security in Latvia
Authors: Lulle Aija , Ungure Elza
Published: February 2017

In this paper we analyse emerging discourses of fear on the one hand and safety and security on the other. In the context of rupture - sudden, unprecedented asylum flows as well as the historical context of the fear and experience of losing the state’s freedom, we pose the following research question: Where do insecurities and fear come from and how are spaces of security and safety carved out through public discourses? We argue that, instead of singling out political discourses in Eastern European as filled with hatred towards other ethnicities and races or an inability to show solidarity with human suffering, we have to open up a far more deep reaching debate on the interplay of fear and the willingness to create safer, more secure futures. We illustrate this with examples from media debates in Latvia, in late 2015.
Russian Information Operations Against the Ukrainian State and Defence Forces: April-December 2014 in Online News
Authors: Müür Kristiina , Mölder Holger , Sazonov Vladimir , Pruulmann-Vengerfeldt Pille
Published: February 2017

The aim of the current article is to provide analysis of information operations of the Russian Federation performed against the Ukrainian state and defence forces from 1 April until 31 December 2014. Russia uses ideological, historical, political symbols and narratives for justifying and supporting their military, economic and political campaigns not only in Donbass but in the whole of Ukraine. The article concentrates on the various means of meaning-making carried out by Russian information operations regarding the Ukrainian state and military structures.
Risk assessment in transportation systems
Authors: Młyńczak Marek
Published: February 2017

The paper presents problems of hazard identification in transportation systems, where not only field of action is large but also cause-consequences relations between failure causes and losses are distant in time and space. It is observed in transportation systems of goods and passengers, systems of water, gas, oil distribution and electro-energetic nets. Proposed systemic approach based on system elements classification on active (casual) and passive ones (affected). There are described concepts of vulnerability (damageability), resilience (ability of recovering and risk controlling by introducing safety measures to undesired event chain.
State Policies toward Islam in Twenty Countries in Western Europe: The Accommodation of Islam Index
Authors: Kaya Serdar
Published: February 2017

This study creates an index that reveals the extent to which Western European countries accommodate Islamic traditions and practices. The index covers six realms in which Muslim communities seek accommodation: (1) education, (2) chaplaincy services, (3) mosques, (4) cemeteries, (5) Islamic attire, and (6) halal food. The study examines and quantifies the state policies in twenty Western European countries on both national and municipal levels with a particular focus on actual implementation. Results indicate that Western European countries vary widely in terms of their accommodation of Islam. There are also notable within-country differences, due in part to regional governments, as they also make and/or implement policy decisions. Both between- and within-country variations in the accommodation of Islam reveal a variety of nuances, and blur dual categories, such as ethnic-civic and assimilationist-integrationist.
The Television Industry as a Market of Attention
Authors: Nilssen Tore
Published: February 2017

In this article, I present an economist’s perspective on the TV industry and view it as a so-called two-sided market, with advertisers on the one side benefiting from the presence of TV viewers and TV viewers on the other side having a dislike for advertising on TV. I use this framework to discuss the likely future development of pay TV, in particular how a future increase in competition in the TV industry will affect the prevalence of pay TV over advertising-financed TV.
High Risk, Strong Belief
Authors: Fagerjord Anders , Maasø Arnt , Storsul Tanja , Syvertsen Trine
Published: February 2017

When planning for the future, media managers must balance realism with the need to foresee unexpected changes. This article investigates images of the future in the Norwegian media industry in the early years of the 21stcentury and identifies five key trends that media managers envisioned:personalized content, user-generated content, rich media, cross-platform media, andmobility. We argue that increased reflection on such visions and how they are formed may put managers (and researchers) in a better position to meet the future. We therefore ask to what degree they were influenced by actual developments at the time, or anchored in more classical imagery of the future. The analysis illustrates how new technologies become focal points for articulating old dreams about the future. At the latest turn of the century, the mobile phone served as such a focal technology.
Profiling Suspensions in Natural Water by a Simplified Dynamic Light Scattering Procedure and Sedimentation
Authors: Chicea Dan , Chicea Liana-Maria
Published: February 2017

A coherent light scattering experiment was carried out. The samples were aqueous natural water suspensions picked from the same river. While sedimentation occurred in the samples, they were subjected to a dynamic light scattering (DLS) experiment and the time series was recorded at certain time intervals. For each recording, a program written for this purpose, performing at least square minimisation, computed the average diameter of the particles in suspension. The variation of the average diameter in time indicates the dominant type of suspensions in water.
A guardiã das tradições: a História e o seu código curricular
Authors: Abud Katia Maria
Published: February 2017

Este trabalho estuda a permanência de conteúdos da História do Brasil nos programas escolares. Considera desde as primeiras formulações curriculares da disciplina nos programas do Colégio Pedro II até as propostas curriculares surgidas no final do século XX, para analisar a concepção da História escolar. Fundamenta-se no conceito de código curricular formulado por Raimundo Cuesta Fernández, que o entende como uma tradição social composta por ideias e princípios e por um conjunto de práticas profissionais que contribuem para fixar a História como disciplina escolar.
A mídia televisiva e a transmissão de valores na ótica de alunos do Ensino Médio
Authors: Santana Clésia Maria Hora , Mercado Luis Paulo Leopoldo
Published: February 2017

Esse estudo identifica a percepção de jovens do Ensino Médio de duas escolas públicas localizadas em um município do interior do Estado de Alagoas quanto aos valores transmitidos na mídia televisiva. Identifica o perfil desses jovens e a programação por eles preferida nessa mídia. Trata-se de uma pesquisa de campo em duas escolas da rede pública estadual, da qual participaram 87 alunos. O instrumento utilizado foi o questionário com perguntas abertas e fechadas. Conclui-se que se faz necessária a discussão da temática na escola e que o poder dessa mídia não seja ignorado pelos professores, contribuindo para a reflexão acerca dos valores por ela disseminados.
MEMORIAL SOBRE A TRAJETÓRIA ESCOLAR BÁSICA DE MARCELA SILVA GUIMARÃES
Authors: GUIMARÃES Marcela Silva
Published: February 2017

O presente texto trata do memorial sobre a trajetória escolar de Marcela Silva Guimarães, ex-integrante do Programa Conexões de Saberes. Tem como objetivo apresentar os passos percorridos desde o início da educação básica até a entrada à UFPA e quais os principais entraves de estudantes das comunidades populares adentrarem o ensino superior público. A memória foi usada como principal referência para construção do material. Em seus resultados, apresenta os esforços individual e coletivo para que de fato a educação seja uma questão de direito e não de privilégio de poucos.
Engineers Need To Learn From History Because the Industry Tends To Repeat It
Authors: Rassenfoss Stephen
Published: February 2017

In the 2 years since oil prices plunged, job cuts and retirements have changed the face of petroleum engineering. SPE’s membership mix has shifted to younger, with the biggest numbers in their 20s and 30s.

“We have seen most of the older generation wiped out. It is pretty scary seeing the people being asked to leave” who have so much knowledge, said Tom Blasingame, the technical director for reservoir description and dynamics.

There are still Baby Boomers left in the ranks, and they want to pass on what they have learned from experience. The seven SPE directors interviewed for this story began their careers during the long-lasting funk that began in the early 1980s and lingered through the 1990s. At last year’s SPE Annual Technical Conference and Exhibition (ATCE) in Dubai, they offered their perspectives in a discussion titled “The Way to Move Forward is to Look Back.”

While the oil market seems to have settled into a narrow range and the pace of layoffs slowed later in the year, these are still hard times.

“Unfortunately a lot of people are losing their jobs; that is happening across the world and across the industry, even in national oil companies,” said Hisham Saadawi, technical director for production and facilities. “The perception is prices will remain like this now.”

The pressure to cut costs remains intense, including personnel budgets. Even some top students from Texas A&M University are hearing from companies that “we do not have the budget to hire now,” said Blasingame, a petroleum engineering professor at Texas A&M, adding that for many, “the anxiety meter is off the scale.”

Fewer students are enrolling in petroleum engineering programs in the US and elsewhere because it no longer ensures a good-paying job, with some schools seeing declines of 50% or more in their incoming classes.

“There is no panic. I am sensing the biggest concern is the job situation for graduates. That is pretty tough in many places,” said Dan Hill, director for academia. For the faculty in many programs, there is a positive side to the declines in enrollment: the lowering of class sizes to more desirable levels.
Risk-Based Abandonment-Prioritization Strategy for Inactive Subsea Wells
Authors: Wilson Adam
Published: February 2017

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 181020, “Risk-Based Abandonment-Prioritization Strategy for Inactive Subsea Wells,” by Abimbola Oladipo, Maersk Oil North Sea UK, and Adrian Houlbrook, DNV GL, prepared for the 2016 SPE Intelligent Energy International Conference and Exhibition, Aberdeen, 6–8 September. The paper has not been peer reviewed.

This paper describes how an exploration-and-production company successfully developed and applied a qualitative risk-based abandonment-prioritization strategy for an inventory of inactive subsea wells. The exercise entailed a qualitative-assessment methodology using 25 well-integrity-related criteria. An aggregate of weighted scores was subsequently applied to the company’s corporate risk-assessment matrix on the basis of the escalation potential in the event of a loss of containment. The results clearly highlighted the wells with the highest risks.

Well History

The inactive subsea wells relevant to the exercise are distributed across the central North Sea in water depths ranging from 244 to 474 ft. These normal-pressure/normal-temperature subsea wells are all located in the mature UK Central North Sea offshore basin and were completed in relatively benign reservoirs with comparatively low corrosion susceptibility.

Each inactive subsea well evaluated had functioned earlier in its life as an oil producer (with gas lift capability), water injector, or aquifer well. The majority of these subsea wells were shut in and disconnected from their flowlines and hydraulic-control and data-acquisition systems. However, the wells’ physical isolation from the flowlines and great distance from the host installation meant that they presented negligible safety risks to personnel onboard the installations.

Methodology

Because degradation is not driven solely by age, and having recognized that each well behaves differently, the methodology (Fig. 1) required each well to be assessed on the basis of evidential information presented and in accordance with how closely the well followed the corporate standard ideal integrity model of its well type. A specific set of scoring guidelines was developed and reflected corporate risk-management protocols to achieve a consistent, fair, and accurate risk ranking. These guidelines were based on a number of factors, including but not limited to the technical integrity of key elements, evidential documentation, field service history, incident records, and well-integrity maintenance records.

An initial classification was applied on the basis of the available design life of key surface equipment (in this case, subsea horizontal spool trees and wellheads) and well functionality, thus enabling each well to be classified broadly into one of three preliminary-risk-assessment categories: high, medium, or low.
Corrigendum to: 'Ecological succession of zooplankton species in a temporary river in a semi arid region of Brazil' [Braz. J. Biol. Sci. (2014), vol. 1, no. 2, p. 51-58]
Authors: Crispim Maria Cristina , Paz Ronilson Jos� da , Watanabe Takako
Published: February 2017

Corrigendum
Biologiczne aspekty śródoperacyjnej radioterapii i roli płynów pooperacyjnych w terapii raka piersi
Authors: Piotrowski Igor , Kulcenty Katarzyna , Murawa Dawid , Suchorska Wiktoria Maria
Published: February 2017

W ciągu ostatniego stulecia radykalna mastektomia stanowiła główną metodę terapii pacjentów z nowotworem piersi. Dopiero pod koniec dwudziestego wieku mastektomia została zastąpiona przez zastosowanie oszczędzającego zabiegu chirurgicznego połączonego z frakcjonowaną radioterapią zewnętrzną (ang. external beam radiation therapy, EBRT), co znacznie obniżyło ryzyko wystąpienia u pacjentów wznowy miejscowej [1]. Pomimo osiągania dobrych wyników leczenia bez występowania ciężkich skutków ubocznych, czas trwania terapii EBRT stanowi poważne ograniczenie. Pacjenci mieszkający w dużej odległości od ośrodka radioterapii lub pacjenci wycieńczeni po przebytej chemioterapii często nie otrzymują radioterapii po wycięciu guza lub poddawani są zabiegowi mastektomii [2]. Rozwiązaniem tego problemu może być zastosowanie śródoperacyjnej radioterapii (ang. intraoperative radiotherapy, IORT), która podawana jest w jednej dawce w trakcie zabiegu chirurgicznego do loży po wycięciu guza. Rezultaty badań klinicznych  ELIOT  i TARGIT-A  pokazały, że zastosowanie tej metody w odpowiednio wyselekcjonowanej grupie pacjentów może przynieść lepsze wyniki niż zastosowanie techniki EBRT [3, 4]. Jednak efekty działania śródoperacyjnej radioterapii na mikrośrodowisko guza nie są dobrze poznane. Wykazano, że proces zapalny wywołany zabiegiem chirurgicznym może stymulować wzrost pozostałych po zabiegu operacyjnym komórek nowotworowych [5]. Co więcej, najnowsze wyniki badań sugeruje, że proces ten może być hamowany poprzez zastosowanie radioterapii [6]. Lepsze zrozumienie interakcji zachodzących pomiędzy komórkami nowotworu piersi i mikrośrodowiskiem guza w odpowiedzi na napromieniowanie może pozwolić na odkrycie nowych strategii terapii nowotworów piersi.
Implementation of the Predictive Current Control of Multi-Pulse Flexible Topology Thyristor Rectifier Under Unbalanced Source Voltages
Authors: Damin Zhang , Shitao Wang , Shaobo Kang , Ji Zhang
Published: February 2017

Predictive current control strategy has captured much concern recently in power converters. As for the multi-pulse flexible-topology thyristor rectifiers (m-PFTTR), the symmetry of the input line-to-line voltages has great influence upon the implementation of the control strategy. Existing literatures have mainly focused on the implementation under ideal condition, i.e., the input line-to-line voltages, being critical to the predictive current controller, were supposed to be symmetrical. In fact, the unbalance of the input line-to-line voltages usually exists in the windings of the zigzag transformer at front end and the A/D converter of the digital signal processor (DSP). This paper presents a new method to dynamically regulate the input line-to-line voltages to ensure the symmetry of each other. It is realized through the instantaneous correction of the bias values in the course of sampling, and the correction is embodied in the modified control algorithm. The paper includes analyses of the m-PFTTR as well as the control algorithm, simulation and experiments. Simulation and experimental results demonstrate the effectiveness of the presented method.