bluuebunny/crossref_metadata_2025_split huggingface dataset:
EXPLAINING COORDINATION BETWEEN NATIONAL REGULATORS IN EU AGENCIES: THE ROLE OF FORMAL AND INFORMAL SOCIAL ORGANIZATION
Authors: HEIMS EVA M. 
Published: November 2015

Coordination between national regulators inEUagencies is based on a variety of mechanisms – such as mutual exchange and hierarchy – which the existing literature has extensively documented. However, it has paid less attention to explaining such variation. This article suggests that cultural theory can systematically integrate the observation of varied coordination mechanisms into one framework. More crucially, cultural theory also provides a coherent theoretical explanation for variation of coordination mechanisms by pointing to the importance of formal and informal social organization: the grid and group boundedness of national regulators, namely the constraints exercised on them byEUbodies and by the shared norms of their professional communities, can account for the emergence of different types of coordination across policy sectors. The article demonstrates this by presenting original empirical research on three cases, namely coordination between national regulators in theEUagencies responsible for food and maritime safety, as well as banking regulation.
How Exclusive is Assembly Democracy? Citizens' Assembly and Ballot Participation Compared
Authors: Stadelmann‐Steffen Isabelle , Dermont Clau 
Published: November 2015

AbstractThis paper analyses the difference between two specific forms of citizens’ involvements, namely whether a vote is cast by ballot or in a citizens’ assembly in which people gather in town halls to decide legislative questions in a deliberative manner. We show both theoretically and empirically how citizens’ assemblies and decisions at the ballot box substantially differ not only in terms of their underlying model of democracy, but also in their structural conditions and, thus, with respect to the social inequality of participation. We test our hypotheses in a Bayesian multilevel framework using real participation data collected from 15 political decisions made in a Swiss commune. Our results show that citizens’ assemblies are not only characterised by lower participation rates, but also by a particular composition of the electorate. While citizens’ assemblies are more equal regarding income groups, ballots favour a more equitable participation in terms of gender and age.
Intra‐Metropolitan Agglomeration of Formal and Informal Manufacturing Activity: Evidence from Cali, Colombia
Authors: Moreno‐Monroy Ana Isabel , Cruz Gustavo Adolfo García 
Published: November 2015

AbstractThis paper compares the agglomeration patterns of formal versus informal manufacturing activity within a metropolitan area of an emergent economy. We use census manufacturing enterprise‐level data for the metropolitan area of Cali for 2005 to calculate the degree of spatial agglomeration and co‐agglomeration by means of M‐functions. We also conduct spatial analysis on the distribution of formal and informal enterprises by means of kernel density mapping of selected industries. We find that although for the industrial sector as a whole informal enterprises display higher agglomeration intensity than formal enterprises of similar size, this is not the case for each individual industry. We also find that significant agglomeration of both formal and informal enterprises of similar size in the same industry does not necessarily imply that they agglomerate in the same areas of the city.
The free delivery and caesarean policy in Morocco: how much do households still pay?
Authors: Boukhalfa C. , Abouchadi S. , Cunden N. , Witter S. 
Published: November 2015

AbstractBackgroundThe Free Deliveries and Caesarean Policy (FDCP) entitles all women in Morocco to deliver free of charge within public hospitals. This study assesses the policy's effectiveness by analysing household expenditures related to childbirth, by delivery type and quintile.MethodsStructured exit survey of 973 women in six provinces at five provincial hospitals, two regional hospitals, two university hospitals and three primary health centres with maternity units.ResultsHouseholds reported spending a median of US$ 59 in total for costs inside and outside of hospitals. Women requiring caesareans payed more than women with uncomplicated deliveries (P < 0.0001). The median cost was US$45 for a uncomplicated delivery, US$50 for a complicated delivery and US$65 for a caesarean section. The prescription given upon exiting the hospital comprised 62% of the total costs. Eighty‐eight per cent of women from the poorest quintiles faced catastrophic expenditures. The women's perception of their hospital stay and the FDCP policy was overwhelmingly positive, but differences were noted at the various sites.ConclusionThe policy has been largely but not fully effective in removing financial barriers for delivery care in Morocco. More progress should also be made on increasing awareness of the policy and on easing the financial burden, which is still borne by households with lower incomes.
Prediction of systolic blood pressure using peripheral pulse palpation in cats
Authors: Reineke Erica L. , Rees Colleen , Drobatz Kenneth J. 
Published: November 2015

AbstractObjectiveTo evaluate the ability of peripheral pulse palpation to predict systolic blood pressure (SBP) in cats presenting as emergencies.DesignProspective observational study performed over an 8‐month period.SettingUniversity veterinary teaching hospital.AnimalsOne hundred two cats presenting to the emergency service. Eligibility for inclusion in the study included a physical examination and a SBP via Doppler technique performed prior to treatment.InterventionsNone.Measurements and Main ResultsFemoral and metatarsal pulses were digitally palpated and the quality of the pulses was assessed as either strong, moderate, poor, or absent. A concurrent SBP was also recorded. The median SBP for all cats was 92.5 mm Hg (range, 30–240 mm Hg). Femoral pulse quality was found to strongly correlate with the admission SBP (P< 0.001, rho = 0.6755). The median SBP for each femoral pulse quality category (strong, moderate, poor, or absent) was significantly different (P< 0.05). For metatarsal pulses, the median SBP for cats with either absent or strong pulses was significantly different (P< 0.001). Cats with absent metatarsal and femoral pulses had a median SBP of 30 mm Hg (range, 30–105 mm Hg), whereas cats with strong metatarsal pulses had a median SBP of 135 mm Hg (range, 58–210 mm Hg). Absent metatarsal pulses correctly identified cats with a blood pressure of 75 mm Hg or less 84% the time (area under the curve: 0.89, confidence interval 0.81, 0.97).ConclusionsIn cats, peripheral pulse quality assessment by emergency room veterinarians correlates with SBP. With progressive decreases in blood pressure, metatarsal pulses will disappear and it is only with severe hypotension that femoral pulses are absent. An assessment of both dorsal metatarsal pulse and femoral pulse quality during triage may be useful in identifying abnormalities in blood pressure.
Hydrologic design aid for urban grass filter strips
Authors: Akan A. Osman , Atabay Serter 
Published: November 2015

AbstractA set of generalised charts are presented in this article as a design aid for hydrologic sizing of grass filter strips. The charts express the volume of runoff and the peak flow rate from a grass strip and the residence time in terms of the size and surface and subsurface characteristics of the grass strip as well as the size and surface characteristics of the area draining to the filter strip. These charts are developed by using a mathematical model based on a kinematic‐wave formulation of overland flow and Green‐and‐Ampt formulation for infiltration. The results are obtained in terms of dimensionless parameters and generalised through the principle of hydrologic similarity. An example is included to demonstrate the use of the charts in a practical design problem.
Off Design Performance Map Similarity Study of Radial Type Turbomachinery in Supercritical CO2 Brayton Cycle
Authors: Cho Seong Kuk , Lee Jekyoung , Lee Jeong Ik 
Published: November 2015

A supercritical carbon dioxide (S-CO2) Brayton cycle has received attention as one of the future power conversion systems because of its high thermal efficiency at relatively low turbine inlet temperature. However, the design process of the S-CO2 compressor is known to be difficult because the fluid properties vary significantly near the critical point. This paper discusses about the design methodology of a S-CO2 compressor on the basis of the existing design practice and performance map of Sandia National Laboratory, which is the only reported experimental data for the S-CO2 compressor. Five parameters are mainly used for verifying the turbomachinery similarity. When all of 5 parameters coincide with the prototype and the conceptually designed turbomachinery, similar performance can be assumed.
As a result, the data of SNL are insufficient to design a single stage compressor which is able to compress from near critical point to 20MPa. The optimum cycle pressure ratio is reported to be around 2.6∼2.7 in the previous S-CO2 Brayton cycle research works. The minimum number of stages is required at least two to utilize the existing data in the compressor design. So this study focuses on two main purposes. The first is to check whether the SNL data can be extended for the larger scale S-CO2 system. Second, the performance map obtained from KAIST_TMD, which is from an in-house code developed by the Korea Advanced Institute of Science and Technology (KAIST) research team, was compared to the SNL data, so that KAIST_TMD can be used as a design tool for a larger scale S-CO2 power conversion system in the future.
Consideration for Running Data Center at High Temperatures and Using Free Air Cooling
Authors: He Yongzhan , Chen Guofeng , Zhang Jiajun , Zhou Tianyu , Liu Tao , Zhu Pinyan , Liu Chao , Ahuja Nishi 
Published: November 2015

The advent of the big data era, the rapid development of mobile internet, and the rising demand of cloud computing services require increasingly more compute capability from their data center. This compute increase will most likely come from higher rack and room power densities or even construction of new Internet data centers. But an increase in a data center’s business-critical IT equipment (servers, hubs, routers, wiring patch panels, and other network appliances), not to mention the infrastructure needed to keep these devices alive and protected, encroaches on another IT goal: to reduce long-term energy usage. Large Internet Data Centers are looking at every possible way to reduce the cooling cost and improve efficiency. One of the emerging trends in the industry is to move to higher ambient data center operation and use air side economizers. However, these two trends can have significant implications for corrosion risk in data centers.
The prevailing practice surrounding the data centers has often been “The colder, the better.” However, some leading server manufacturers and data center efficiency experts share the opinion that data centers can run far hotter than they do today without sacrificing uptime, and with a huge savings in both cooling related costs and CO2 emissions. Why do we need to increase the temperatures? To cool data center requires huge refrigeration system which is energy hog and also cost of cooling infrastructure, maintenance cost and operation cost are heavy cost burden.
Ahuja et al [1] studied cooling path management in data center at typical operating temperature as well as higher ambient operating temperatures. High Temperatures and Corrosion Resistance technology will reduce the refrigeration output and how this innovation will open up new direction in data centers.
Note that, HTA is not to say that the higher the better. Before embracing HTA two keys points need to be addressed and understood. Firstly, server stability along with optimal temperature from data center perspective. Secondly, corrosion resistant technology. With Fresh air cooling the server has to bear with the seasons and diurnal variation of temperatures and these can be over 35 degree C, therefore to some extent, we have to say, HTA design is the premise of corrosion resistant design.
In this paper, we present methods to realize precise HTA operation along with corrosive resistant technology. This is achieved through an orchestrated collaboration between the IT and cooling infrastructures.
Experimentally Validated Numerical Model of a Fully-Enclosed Hybrid Cooled Server Cabinet
Authors: Nemati Kourosh , Alissa Husam A. , Murray Bruce T. , Sammakia Bahgat , Seymour Mark 
Published: November 2015

Because of the rapid growth in the number of data centers combined with the high density heat dissipation in the IT and telecommunications equipment, energy efficient thermal management of data centers has become a key research focus in the electronics packaging community. Traditional legacy data centers still rely largely on chilled air flow delivered to the IT equipment racks through perforated tiles from the raised floor plenum. When there is large variation in the amount of heat dissipated by the racks in a given aisle, the standard air cooling approach requires over-provisioning.
Localized hybrid air-water cooling is one approach to more effectively control the cooling when there is wide variation in the amount of dissipation in neighboring racks. In a closed hybrid air-water cooled server cabinet, the generated heat is removed by a self-contained system that does not interact with the room level air cooling system. In this study, a comprehensive procedure for CFD validation in a close coupled hybrid cooled enclosed cabinet is described. The commercial enclosure has been characterized experimentally in an earlier study, where the effectiveness values were applied as boundary conditions to the compact heat exchanger model.
Here, the previously obtained experimental data are used to validate the results from computational modeling. Two cases with different air flow rates are compared. Very good agreement is achieved, with the maximum overall average error less than 4%. Due to relatively high pressure inside the cabinet, it is possible that air leakage from the cabinet may be responsible for the discrepancy between the model and experimental results. A sensitivity study was applied to the validated model to investigate the effect leakage had on the cabinet’s performance.
Thermal and Optical Performance of Eco-Friendly Silk Fibroin Proteins as a Cavity Encapsulation Over LED Systems
Authors: Yuruker Sevket Umut , Arik Mehmet , Tamdogan Enes , Melikov Rustamjon , Nizamoglu Sedat , Press Daniel Aaron , Durak Ilkem 
Published: November 2015

The demand for high power LEDs for illumination applications is increasing. LED package encapsulation is one of most critical materials that affect the optical path of the generated light by LEDs, and may result in lumen degradation. A typical encapsulation material is a mixture of phosphor and a polymer based binder such as silicone. After LED chips are placed at the base of a cavity, phosphor particles are mixed with silicone and carefully placed into the cavity. One of the important technical challenges is to ensure a better thermal conductivity than 0.2 W/m-K of current materials for most of the traditional polymers in SSL applications.
In this study, we investigated an unconventional material of the silk fibroin proteins for LED applications, and showed that this biomaterial provides thermal advantages leading to an order of magnitude higher thermal performance than conventional silicones. Silk fibroin is a natural protein and directly extracted from silk cocoons produced by Bombyx mori silkworm. Therefore, it presents a “green” material for photonic applications with its superior properties of biocompatibility and high optical transparency with a minimal absorption. Combining these properties with high thermal performance makes this biomaterial promising for future LED applications.
An experimental and computational study to understand the optical and thermal performance is performed. A computational fluid dynamics study with a commercial CFD software was performed and an experimental set-up was developed to validate the computational findings to determine the thermal conductivity of the proposed material.
Benchmarking Study on the Thermal Management Landscape for 3D ICs: From Back-Side to Volumetric Heat Removal
Authors: Brunschwiler Thomas , Sridhar Arvind , Ong Chin Lee , Schlottig Gerd 
Published: November 2015

An overview of the thermal management landscape with focus on heat dissipation from 3D chip stacks is provided in this study. Evolutionary and revolutionary topologies, such as single-side, dual-side and, finally, volumetric heat removal, are benchmarked with respect to a high-performance three-tier chip stack with an aggregate power dissipation of 672 W. The thermal budget of 50 K can be maintained by three topologies, namely, 1) dual-side cooling, implemented by a thermally active interposer, 2) interlayer cooling with 4-port fluid delivery and drainage at 100 kPa pressure drop, and 3) a hybrid approach combining interlayer with embedded back-side cooling.
Of all the heat-removal concepts, interlayer cooling is the only approach that scales with the number of dies in the chip stack and hence, enables extreme 3D integration. However, the required size of the microchannels competes with the requirement of low TSV heights and pitches. A scaling study was performed to derive the TSV pitch that is compatible with cooling channels to dissipate 150 W/cm2 per tier. An active IC area of 4 cm2 was considered, which had to be implemented on the varying tier count in the stack. A cuboid form factor of 2 mm × 4 mm × 2.55 mm results from a die count of 50. The resulting microchannels of 2 mm length allow small hydraulic diameters and thus a very high TSV density of 1837 1/mm2. The accumulated heat flux and the volumetric power dissipation are as high as 7.5 kW/cm2 and 29kW/cm3, respectively.
Enhanced Melting for Transient Thermal Management
Authors: Rozenfeld T. , Hayat R. , Kozak Y. , Ziskind G. 
Published: November 2015

The present study deals with transient thermal management using phase change materials (PCMs). These materials can absorb large amounts of heat without significant rise of their temperature during the melting process. This effect is attractive for passive thermal management, particularly where the device is intended to operate in a periodic regime, or where the relatively short stages of high power dissipation are followed by long stand-by periods without a considerable power release. Heat transfer in PCMs, which have low thermal conductivity, can be enhanced by fins that enlarge the heat transfer area. However, when the PCM melts, a layer of liquid is growing at the fins creating an increasing thermal resistance that impedes the process.
The present work aims to demonstrate that performance of a latent-heat thermal management unit may be considerably affected by achieving a so-called close-contact melting (CCM), which occurs when the solid phase is approaching a heated surface, and only a thin liquid layer is separating between the two. Although CCM was extensively studied in the past, its possible role in finned systems has been revealed only recently by our group. In particular, it depends heavily on the specific configuration of the fins.
In the present work, close-contact melting is modeled analytically for a geometry which includes two symmetrically inclined fins. A quasi-steady approach is used for calculating the rate of melting based on the force and energy balances.
The results are expressed in terms of the time-dependent melt fraction and Nusselt number, showing their explicit dependence on the Stefan and Fourier numbers. Moreover, the approach used in the present study may be applied to other geometries in which the heated surface is not horizontal or where there are a number of heated surfaces or fins.
Characterization of Doped SAC Solder Materials and Determination of Anand Parameters
Authors: Ahmed Sudan , Basit Munshi , Suhling Jeffrey C. , Lall Pradeep 
Published: November 2015

In the electronic packaging industry, it is important to be able to make accurate predictions of board level solder joint reliability during thermal cycling exposures. The Anand viscoelastic constitutive model is often used to represent the material behavior of the solder in finite element simulations. This model is defined using nine material parameters, and the reliability prediction results are often highly sensitive to the Anand parameters.
In present work, three new doped lead free solder materials recommended for high reliability applications have been chemically analyzed and then mechanically tested in order to determine the nine Anand parameters. The alloys are referred to as Ecolloy (SAC_R), CYCLOMAX (SAC_Q), and Innolot by their vendors. The first two doped alloys (SAC_R and SAC_Q) were found to be composed of Sn, Ag, Cu, and a single X-element dopant. Such solders are commonly referred to as SAC-X in the literature. For the third material (Innolot), three different dopants are present along with Sn, Ag and Cu. The EDX method was used to determine the approximate chemical composition of the materials, and Bismuth (Bi) was found to be the X-additive for both SAC_R and SAC_Q. In addition, the SAC_R material was found to have no silver (Ag), which is the reason it is marketed as a low cost (economy) material.
The nine Anand parameters were determined for each unique solder alloy from a set of uniaxial tensile tests performed at several strain rates and temperatures. Testing conditions included strain rates of 0.001, 0.0001, and 0.00001 (sec−1), and temperatures of 25, 50, 75, 100, and 125 C. The Anand parameters were calculated from each set of stress-strain data using an established procedure that is described in detail in the paper. The mechanical properties and the values of Anand parameters for these new doped alloys were compared with those for standard SAC105 and SAC405 lead free alloys.
Although the SAC_R material does not have any silver, it was shown to have better mechanical behavior than SAC105 due to the presence of Bismuth (Bi) along with a little higher percentage of Copper (Cu). The SAC_Q and Innolot materials were shown to have significantly higher strength than SAC405. After deriving the Anand parameters for each alloy, the stress-strain curves have been calculated for various conditions, and excellent agreement was found between the predicted results and experimental stress-strain curves.