bluuebunny/crossref_metadata_2025_split huggingface dataset:
Energy Performance Analysis of Insulating Windows
Authors: Iordache Florin , Clita Iulian , Klepş Arthur-Sebastian 
Published: July 2013

Abstract
The present paper thematically fits in the current concern for reducing energy consumption to ensure normal thermal comfort in residential and tertiary building heated spaces. Windows are an important area of the building envelope through which heat dissipates from the interior space to the exterior. As it is known the new insulating window types significantly reduce energy dissipation by both transmission and infiltration. This paper aims to establish the theoretical correlations that exist between different constructive functional parameters of insulating windows, such as gas or gases located between two or three window sheets and low-ε films to be applied on interior faces of the transparent elements. The theoretical work procedures as well as the tabulated and graphical results regarding the thermal resistances for various insulated window structures are presented. The results are analyzed in comparison with the values contained in the C107 regulation for building heat calculations.
Is it Possible to Generate Development Starting from Communication?
Authors: Alfaro Moreno Rosa María 
Published: July 2013

Abstract
Communication, both intra-sector and among sectors, can generate dialogues and reciprocity and render development a public matter, i.e. a matter that pertains to all, including the media sector. However, it is still the case that we are faced with scattered social forces, unclear about their role in promoting inclusive, equitable and plural development. Those forces sometimes lack in democratic convictions or in significant social bonds among similarly minded groups. This article condenses years of reflection on our work at the Association of Social Communicators “Calandria”, a Peruvian civil society institution created in 1983 as the point of departure to argue that citizens should be the protagonists of development in a relationship with other key players, from government, the business community and organized civil society.
The Growing Pains of Community Radio in Africa
Authors: Costa Peter da 
Published: July 2013

Abstract
Community radio is considered as an intervention strategy of choice for deepening participation and community ownership. Donors have funded a proliferation of community radio projects in the Global South, prompted by stories attesting to the power of radio as a tool for social change. The evidence suggests that beyond empowering communities, community radio can catalyse behaviour change and impact positively on wider development outcomes. In practice, the record has been mixed, with sustainability a critical challenge. A recent evaluation found that radio stations created through top-down initiatives tend not to survive when external funding dries up. Where such stations do survive, their purpose often becomes different from what was originally intended. Only in a handful of cases have previously aid-dependent radio stations become sustainable. Informed by insights from practitioners, and evaluation reports and scholarly literature, this article draws some emerging lessons.
ComDev in the Mediatized World
Authors: Hemer Oscar , Tufte Thomas 
Published: July 2013

Abstract
In late 2011 we are in the beginning of a revolution that may or may not turn out to be more far-reaching than the one unleashed in 1989. A common denominator in this resurging revolution is the mobilizing power of the so-called social media. Even if labels such as the Twitter or Facebook revolution are rightfully refuted, the on-going Arab Spring is a clear-cut example of an unprecedented communication power, largely out of the authorities’ control.
While the crucial role of media and communication in processes of social change at last becomes evident, it is however not associated with the field of communication for development and social change. While that field historically has been about developing prescriptive recipes of communication for some development, it is time attention is refocused to the deliberative, non-institutional change processes that are emerging from a citizens’ profound and often desperate reaction to the global now.
Successful Images of Successful Ageing?
Authors: Wallander Kristina 
Published: July 2013

Abstract
The dominant discourse concerning older people used to be one of decline and loss. Lately, however, representations of old age have tended to be more diverse and two paradigms have been introduced - one framing enfeeblement and one framing new, positive roles for older people, conceptualized as successful ageing. The present article demonstrates how representations of vigorous elderly people are construed in the programme VeteranTV, produced by UR, Swedish educational television. Part of the aim of VeteranTV was to enhance the image of life after 65 in an anti-ageist spirit. The article discusses the images of vigorous elderly people with respect to their emphasis on sameness or difference, their age-coding, the discourses and subject positions emphasized in them, and not least, their possible ageism.
Ubiquitous Absence
Authors: Pötzsch Holger 
Published: July 2013

Abstract
The present article provides an analysis of the narrative and technical devices through which contemporary war films frame audience engagement with characters. It compiles and systematizes a wide set of empirical findings and exemplifies these through brief, illustrative readings of a selection of films. Combining Smith’s approach to film reception with insights from Laclau and Mouffe’s theory of discourse, the article argues for the significance of the identified audio-visual rhetoric for political discourse and practice.
Peripheral challenge by Small and Medium Sized Ports (SMPs) in Multi-Port Gateway Regions: the case study of northeast of China
Authors: Feng Lin , Notteboom Theo 
Published: July 2013

Abstract
This paper focuses on the role of small and medium-sized ports (SMPs) in enhancing the competitiveness and logistics performance of multi-port gateway regions and associated inland logistics systems. The concepts developed will be applied to the ports in the northeast of China, a multi-port gateway region around the Bohai Sea Economic Rim (BER). Port competition is analyzed by multi-variable methodology and generalized common characteristics of SMPs compared to gateway ports, and the similarities of SMPs and SMEs are also compared. Later in this paper, we analyze the role of a SMP in such region in different variables: (a) cargo volume and market share; (b) international connectivity; (c) relative cluster position; (d) port city and hinterland connection; and (e) logistics and distribution function. The five-dimension analysis combined with in-depth cases study of typical Yingkou port describes a profile of SMPs in the BER and provides future study possibility for more SMPs cases worldwide.
Percutaneous mechanical thrombectomy of superior mesenteric artery embolism
Authors: Kuhelj Dimitrij , Kavcic Pavel , Popovic Peter 
Published: July 2013

Abstract
Background. The present series present three consecutive cases of successful percutaneous mechanical embolectomy in acute superior mesenteric artery ischemia. Superior mesenteric artery embolism is a rare abdominal emergency that commonly leads to bowel infarction and has a very high mortality rate. Prompt recognition and treatment are crucial for successful outcome. Endovascular therapeutic approach in patients with acute SMA embolism in median portion of its stem is proposed.
Case reports. Three male patients had experienced a sudden abdominal pain and acute superior mesenteric artery embolism in median portion of its stem was revealed on computed tomography angiography. No signs of intestinal infarction were present. The decision for endovascular treatment was made in concordance with the surgeons. In one patient 6 French gauge Rotarex® device was used while in others 6 French gauge Aspirex® device were used. All patients experienced sudden relief of pain after the procedure with no signs of intestinal infarction. Minor procedural complication - rupture of a smaller branch of SMA during Aspirex® treatment was successfully managed by coiling while transient paralytic ileus presented in one patient resolved spontaneously. All three patients remained symptom-free with patent superior mesenteric artery during the follow-up period.
Conclusions. Percutaneous mechanical thrombectomy seems to be a rapid and effective treatment of acute superior mesenteric artery embolism in median portion of its stem in absence of bowel necrosis. Follow-up of our patients showed excellent short- and long-term results.
The potential value of the neutral comet assay and γH2AX foci assay in assessing the radiosensitivity of carbon beam in human tumor cell lines
Authors: Zhao Jin , Guo Zhong , Zhang Hong , Wang Zhenhua , Song Lei , Ma Jianxiu , Pei Shuyan , Wang Chenjing 
Published: July 2013

Abstract
Background. Carbon ions (12C6+) are high linear energy transfer (LET) radiation characterized by higher relative biological effectiveness than low LET radiation. The assessment of tumour radiosensitivity would be particularly useful in optimizing the radiation dose during radiotherapy. The aim of the current study was to evaluate the potential value of the neutral comet assay and γH2AX foci assay in assessing 12C6+ radiosensitivity of tumour cells.
Materials and methods. The doses of 12C6+ and X-rays used in the present study were 2 and 4 Gy. The survival fraction, DNA double-strand breaks (DSB) and repair kinetics of DSB were assayed with clonogenic survival, neutral comet assay and γH2AX foci assay in human cervical carcinoma HeLa cells, hepatoma HepG2 cells, and mucoepidermoid carcinoma MEC-1 cells at the time points of 0.5, 4, 16 and 24 h after 12C6+ and X-rays irradiation.
Results. The survival fraction for 12C6+ irradiation was much more inhibited than for X-rays (p < 0.05) in all three tumour cell lines tested. Substantial amounts of residual damage, assessed by the neutral comet assay, were present after irradiation (p < 0.05). The highest residual damage was observed at 0.5 or 4 h, both for 12C6+ and X-ray irradiation. However, the residual damage in HeLa and MEC-1 cells was higher for 12C6+ than X-rays (p < 0.05). The strongest induction of γH2AX foci was observed after 30 min, for all three tumour cell lines (p < 0.01). The franction of γH2AX foci persisted for at least 24 h after 12C6+ irradiation; in HeLa cells and MEC-1 was higher than after X-ray irradiation (p < 0.05). The correlation coefficients between the clonogenic survival, neutral comet assay and γH2AX foci assay were not statistically significant, except for some tumour cells at individual irradiation doses and types.
Conclusions. Our study demonstrated that the neutral comet assay and γ-H2AX foci assay could be used to assess the radiosensitivity of 12C6+ in human tumour cells.
Compressive response of some agricultural soils influenced by the mineralogy and moisture
Authors: Ajayi A.E. , Dias Junior M.S. , Curi N. , Oladipo I. 
Published: July 2013

Abstract
This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture retention by the core samples was typically low with pre-compression stress values ranging from50 to 300 kPa at both sites. Analyses of the shape of the compression curves highlight the influence of soil moisture in shifts from the bi-linear to S-shaped models. Statistical homogeneity test of the load bearing capacity parameters showed that the soil mineralogy influences the response to loading by these soils. These observations provide a physical basis for the previous classification series of the soils in the studied area. We showed that the internal strength attributes of the soil could be inferred from the mineralogical properties and stress history. This could assist in decisions on sustainable mechanization in a datapoor environment.
Estimation of soil water evaporative loss after tillage operation using the stable isotope technique
Authors: Busari M.A. , Salako F.K. , Tuniz C. , Zuppi G.M. , Stenni B. , Adetunji M.T. , Arowolo T.A. 
Published: July 2013

Abstract
Application of stable isotopes in soil studies has improved quantitative evaluation of evaporation and other hydrological processes in soil. This study was carried out to determine the effect of tillage on evaporative loss of water from the soil. Zero tillage and conventional tillage were compared. Suction tubes were installed for soil water collection at the depths 0.15, 0.50, and 1.0 m by pumping soil water with a peristaltic pump. Soil water evaporation was estimated using stable isotopes of water. The mean isotopic composition of the soil water at 0.15 m soil depth were -1.15‰ (δ18O) and -0.75‰ (δD) and were highly enriched compared with the isotopic compositions of the site precipitation. Soil water stable isotopes (δ18O and δD) were more enriched near the surface under zero tillage while they were less negative down the profile under zero tillage. This suggests an occurrence of more evaporation and infiltration under conventional then zero tillage, respectively, because evaporative fractionation contributes to escape of lighter isotopes from liquid into the vapour phase leading to enrichment in heavy isotopes in the liquid phase. The annual evaporation estimated using the vapour diffusion equation ranges from 46-70 and 54-84 mm year-1 under zero and conventional tillage, respectively, indicating more evaporation under conventional tillage compared with zero tillage. Therefore, to reduce soil water loss, adoption of conservation tillage practices such as zero tillage is encouraged.
Measurements of methane emission from a temperate wetland by the eddy covariance method
Authors: Kowalska N. , Chojnicki B.H. , Rinne J. , Haapanala S. , Siedlecki P. , Urbaniak M. , Juszczak R. , Olejnik J. 
Published: July 2013

Abstract
Methane emission from a wetland was measured with the eddy covariance system. The location of the system allowed observation of methane efflux from areas that were covered by different vegetation types. The data presented in this paper were collected in the period between the13th of June and the 31st of August 2012. During the warmest months of the summer, there was no strong correlation between methane emissions and either the water table depth or peat temperature. The presence of reed and cattail contributed to a pronounced diurnal pattern of the flux and lower methane emission, while areas covered by sedges emitted higher amounts more with no clear diurnal pattern.
Peach response to water deficit in a semi-arid region
Authors: Paltineanu C. , Septar L. , Moale C. , Nicolae S. , Nicola C. 
Published: July 2013

Abstract
During three years a deficit irrigation experiment was performed on peach response under the semi-arid conditions of south-eastern Romania. Three sprinkler-irrigated treatments were investigated: fully irrigated, deficit irrigation treatment, and non-irrigated control treatment. Soil water content ranged between 60 and 76% of the plant available soil water capacity in fully irrigated, between 40 and 62% in deficit irrigation treatment, and between 30 and 45% in control. There were significant differences in fruit yield between the treatments. Irrigation water use efficiency was maximum in deficit irrigation treatment. Fruit yield correlated significantly with irrigation application. Total dry matter content, total solids content and titrable acidity of fruit were significantly different in the irrigated treatments vs. the control. Significant correlation coefficients were found between some fruit chemical components. For the possible future global warming conditions, when water use becomes increasingly restrictive, deficit irrigation will be a reasonable solution for water conservation in regions with similar soil and climate conditions.
Acquisition and Tracking of Galileo IOV E5 Signals: Experimental Results and Performance Evaluation
Authors: Margaria Davide , Fantino Maurizio , Musumeci Luciano 
Published: July 2013

Abstract
An assessment of the Galileo In-Orbit Validation (IOV) signals on the E5 band is presented in this paper, investigating the signal features compared with the expected characteristics as described in the Galileo Interface Control Document (ICD) specifications. In detail, the results in terms of signal acquisition and tracking during multiple satellite passes are discussed, providing also a description of the experimental setup used in order to separately receive and process E5a and E5b signals. The analysis covers the received signal strength versus the satellite elevation, the modulation format, and the presence of navigation data and secondary code chips. Since at time of writing both the two Galileo IOV satellites (PFM and FM2) are broadcasting E5 signals, the results obtained processing their E5a and E5b signals are discussed. In addition, these signals are also compared with those currently transmitted by the two experimental Galileo satellites, GIOVE-A and GIOVE-B.
Understanding of Navigational Information Systems
Authors: Pleskacz Krzysztof , Uriasz Janusz 
Published: July 2013

Abstract
Navigational information systems became one of the main devices on ship’s bridge supporting navigators in evaluation of navigational situation and undertaking decisions. For instance ECIDS supports navigation by gathering information and automating some process like plotting of position of own ship and other objects on the scene. Any navigational information system has got advantages and limitations. Their understanding should help navigators to perform watches in a safer way. This article presents a discussion on some deficiencies of navigational information systems. Discussion is underlined by three accidents, which show when misunderstanding or overreliance may lead to catastrophic consequences
On the Monitoring System of Collision Risks Among Multiple Ships
Authors: Son Nam-Sun , Kim Sun-Yonug , Lee Chan-Soo 
Published: July 2013

Abstract
To reduce crewmembers’ error and increase the safety of ships’ navigation, a recognition system of collision risks among multiple ships is newly-developed. By using ships’ navigational information such as AIS data, an algorithm to calculate collision risks among multiple ships is newly-designed. Collision risks of multiple ships can be estimated considering ships’ position and course of now and future by using fuzzy algorithm. To evaluate the performance of new system, replay simulation is carried out by using actual AIS data of actual collision accident in Korea. In this paper, main features of the monitoring system of collision risks and the results of replay simulation are discussed.
Low-Cost Navigation and Guidance Systems for Unmanned Aerial Vehicles — Part 1: Vision-Based and Integrated Sensors
Authors: Sabatini Roberto , Bartel Celia , Kaharkar Anish , Shaid Tesheen , Rodriguez Leopoldo , Zammit-Mangion David , Jia Huamin 
Published: July 2013

Abstract
In this paper we present a new low-cost navigation system designed for small size Unmanned Aerial Vehicles (UAVs) based on Vision-Based Navigation (VBN) and other avionics sensors. The main objective of our research was to design a compact, light and relatively inexpensive system capable of providing the Required Navigation Performance (RNP) in all phases of flight of a small UAV, with a special focus on precision approach and landing, where Vision Based Navigation (VBN) techniques can be fully exploited in a multisensor integrated architecture. Various existing techniques for VBN were compared and the Appearance-Based Approach (ABA) was selected for implementation. Feature extraction and optical flow techniques were employed to estimate flight parameters such as roll angle, pitch angle, deviation from the runway and body rates. Additionally, we addressed the possible synergies between VBN, Global Navigation Satellite System (GNSS) and MEMS-IMU (Micro-Electromechanical System Inertial Measurement Unit) sensors, as well as the aiding from Aircraft Dynamics Models (ADMs). In particular, by employing these sensors/models, we aimed to compensate for the shortcomings of VBN and MEMS-IMU sensors in high-dynamics attitude determination tasks. An Extended Kalman Filter (EKF) was developed to fuse the information provided by the different sensors and to provide estimates of position, velocity and attitude of the UAV platform in real-time. Two different integrated navigation system architectures were implemented. The first used VBN at 20 Hz and GPS at 1 Hz to augment the MEMS-IMU running at 100 Hz. The second mode also included the ADM (computations performed at 100 Hz) to provide augmentation of the attitude channel. Simulation of these two modes was accomplished in a significant portion of the AEROSONDE UAV operational flight envelope and performing a variety of representative manoeuvres (i.e., straight climb, level turning, turning descent and climb, straight descent, etc.). Simulation of the first integrated navigation system architecture (VBN/IMU/GPS) showed that the integrated system can reach position, velocity and attitude accuracies compatible with CAT-II precision approach requirements. Simulation of the second system architecture (VBN/IMU/GPS/ADM) also showed promising results since the achieved attitude accuracy was higher using the ADM/VBS/IMU than using VBS/IMU only. However, due to rapid divergence of the ADM virtual sensor, there was a need for frequent re-initialisation of the ADM data module, which was strongly dependent on the UAV flight dynamics and the specific manoeuvring transitions performed
Simulation Analysis of ECDIS’ Route Exchange Funcionality Impact on Navigation Safety
Authors: Tomczak Arkadiusz , Zalewski Paweł , Gralak Rafał 
Published: July 2013

Abstract
Modern Integrated Navigation Systems (INS) integrate information obtained from various sensors and functions. Processed data are presented on the computer display generally with the aim to increase navigator’s situation awareness and to reduce his/her workload. The investigations described in the paper were carried out to assess the advantages of the new functionality of the test INS (e-Navigation enhanced Integrated Navigation System ee-INS), developed in the EU financed EfficienSea Project, that looks and works like a standard ECDIS. This new functionality implements ‘Exchange of Intended Route’ service. The experiment was conducted in a full mission ship simulator environment with 20 experienced mariners. The bridge layout without ECDIS ‘Exchange of Intended Route’ functionality, and bridge layout with this functionality implemented, was applied in research and its results enabled to carry out their comparison. The navigators’ workload was measured by NASA-TLX method. Navigators’ situation awareness in respect to other ship’s state and the final passing distance were utilized to evaluate safety of navigation process.