bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chronic headache among general practice out patients in a tertiary care hospital, Eastern Nepal
Authors: Bhandari Rabin , Bhandari R , Shakya DR , Maskey R , Paudel M , Giri R , Gupta PP 
Published: June 2017

Background: The term chronic headache is commonly taken as headache lasting for more than three months. It is common in general practice with minimal research on the topic in Nepal. Objective: To sort out the common diagnoses of chronic headache and to study the clinical features and demographic profile of patients presenting with chronic headache.Method: A descriptive cross sectional study was conducted (2012 August to 2013 August) at General Practice outpatients in BP Koirala Institute of Health Sciences, a medical university in eastern Nepal. Approval and ethical clearance was taken from Research Committee and Institutional Ethical Review Board. Descriptive statistical analysis was done.Result: 168 patients constituting 1% of outpatient visits presented due to chronic headache. Mean age was 29.57 years (SD 10.53) and female to male ratio was 3.67. Mean number of days of headache was 19.46 days (SD 4.62). Numerical pain score was reported at 7.1/10 (SD 1.85). The mean duration of presentation was 22 months (SD 11). 40% reported impaired activity of more than one week. Headache was classified as chronic migraine in 20.2%, chronic tension type headache in 16.7%, and chronic daily persistent headache in 11.9%. The diagnosis did not fit into any diagnostic criteria in 51.2% cases. Conclusion: Chronic headache is common in females and young age group. Patients present late despite significant pain scores. Significant proportion is still unclassified.Health Renaissance 2015;13(2): 22-29
Methods used and reasons for deliberate self harm: A cross-sectional study in acute care setting of Eastern Nepal
Authors: Yadav Ajay Kumar , Rai B K , Bhandari R , Shakya DR , Gupta PP , Moore M , Budhathoki SS 
Published: June 2017

Background: Deliberate self-harm (DSH) is a widespread yet often hidden problem in adolescents and young adults though most DSH can be classified as “non-suicidal self-cutting”, some do go on to commit suicide. DSH present in acute settings of hospitals while limited information are found on reasons and methods for DSH in eastern Nepal. This study aimed at exploring the reasons and methods for deliberate self harm among patients presenting in acute setting of BPKIHS.Objective: To study the methods used and reasons for deliberate self harm in the patients presenting in emergency department and psychiatry outpatient clinics of BPKIHS.Method: Mix method (quantitative and qualitative) was used to conduct cross-sectional study using a pretested semi-structured questionnaire among 400 patients presenting in emergency department and out-patient clinic of Psychiatry department. In-depth interview was conducted among 12 respondents. Result: Four fifth of the patients, used poison as the method for DSH followed by hanging among less than a tenth of the patients. Majority (88%) of the patients did not have any planning before committing act of DSH. Interpersonal conflict (48%), financial reasons (20%) and broken love affairs (16%) are common events triggering DSH. Two-third of patients who presented with DSH were impulsive and almost two-fifth of them had depression.Conclusion: DSH was more common among the younger population. Advocacy to regulate the availability of pesticides for agricultural use may be needed to prevent the at risk population for accessing and using it for self harm. More community based studies to further explore the social aspects for the act of DSH and further researches is needed to design interventions to prevent the act of DSH at community level.Health Renaissance 2015;13(2): 92-104
Stability of Finite Difference Schemes for Hyperbolic Initial Boundary Value Problems: Numerical Boundary Layers
Authors: Boutin Benjamin , Coulombel Jean-François 
Published: June 2017

AbstractIn this article, we give a unified theory for constructing boundary layer expansions for discretized transport equations with homogeneous Dirichlet boundary conditions. We exhibit a natural assumption on the discretization under which the numerical solution can be written approximately as a two-scale boundary layer expansion. In particular, this expansion yields discrete semigroup estimates that are compatible with the continuous semigroup estimates in the limit where the space and time steps tend to zero. The novelty of our approach is to cover numerical schemes with arbitrarily many time levels.
A Numerical Approximation Structured by Mixed Finite Element and Upwind Fractional Step Difference for Semiconductor Device with Heat Conduction and Its Numerical Analysis
Authors: Yuan Yirang , Yang Qing , Li Changfeng , Sun Tongjun 
Published: June 2017

AbstractA coupled mathematical system of four quasi-linear partial differential equations and the initial-boundary value conditions is presented to interpret transient behavior of three dimensional semiconductor device with heat conduction. The electric potential is defined by an elliptic equation, the electron and hole concentrations are determined by convection-dominated diffusion equations and the temperature is interpreted by a heat conduction equation. A mixed finite element approximation is used to get the electric field potential and one order of computational accuracy is improved. Two concentration equations and the heat conduction equation are solved by a fractional step scheme modified by a second-order upwind difference method, which can overcome numerical oscillation, dispersion and computational complexity. This changes the computation of a three dimensional problem into three successive computations of one-dimensional problem where the method of speedup is used and the computational work is greatly shortened. An optimal second-order error estimate in L2 norm is derived by prior estimate theory and other special techniques of partial differential equations. This type of parallel method is important in numerical analysis and is most valuable in numerical application of semiconductor device and it can successfully solve this international famous problem.
Lattice Boltzmann Method for Simulating Phase Separation of Sheared Binary Fluids with Reversible Chemical Reaction
Authors: Wang Xiaoyu , Ouyang Jie , Yang Heng , Liu Jianwei 
Published: June 2017

AbstractA lattice Boltzmann method is utilized for governing equations which control phase separation of binary fluids with reversible chemical reaction in presence of a shear flow in this paper. We first present the morphology modeling of sheared binary fluids with reversible chemical reaction. We then validate the model by taking the unsheared binary fluids as an example. It is found that the results fit well with the references. The paper shows structures of the sheared system and gives the detailed analysis for the morphology of sheared binary fluids with reversible chemical reaction. The phase separation of the domain structures with different chemical reaction rates is discussed. Through simulations of the sheared binary fluids, two interesting phenomena are observed, which do not exist in a binary mixture without reversible chemical reaction. One is that the same results appear in both low and high viscosity, and the other is that the domain growth exponent with both low and high viscosities presents wave due to the competition of the viscosity and phase separation. In addition, we find that the finite size effects resulting in the growth exponent decreasing appear faster than that of the unsheared blend at a large time when the size of domains is comparable with the lattice size.
Fully Discrete Galerkin Finite Element Method for the Cubic Nonlinear Schrödinger Equation
Authors: Wang Jianyun , Huang Yunqing 
Published: June 2017

AbstractThis paper is concerned with numerical method for a two-dimensional time-dependent cubic nonlinear Schrödinger equation. The approximations are obtained by the Galerkin finite element method in space in conjunction with the backward Euler method and the Crank-Nicolson method in time, respectively. We prove optimalL2error estimates for two fully discrete schemes by using elliptic projection operator. Finally, a numerical example is provided to verify our theoretical results.
Redesigning Systems Thinking
Authors: Sevaldson Birger 
Published: June 2017

The resent movement of Systemic Design seeks for new synergies between Design and Systems. While the usefulness of systems approaches in design has been fairly obvious, this paper argues that many core concepts in design are beneficial in systems thinking. This seems reasonable when it comes to the concept of Design Thinking. However, as this paper argues, the more practical core concepts of design are equally important. Designerly skills have been regarded as belonging mainly in the realm of traditional commercial design, whereas design thinking has been regarded as useful in strategic management settings. This paper argues against the idea of separating design thinking from design action. The skills and competences of design, such as the composition of the shape and form that are obvious in product design, are central to Systems Oriented Design (SOD). SOD is a version in the emerging pluralistic field of Systemic Design. The Systemic Design movement should recognise the core values of design and integrate them in systems thinking. This integration would contribute to innovation in both Systemic Design and systems thinking. Among the core competences of design discussed in the paper are composition, choreography, orchestration, the notion of the Gesamtkunstwerk and open-ended multi-scalar design strategies that allow for both structural and organic development. The paper provides examples to support its proposal for the use of concrete aesthetic principles to guide Systemic Design processes. This paper expands the working paper entitled “Holistic and dynamic concepts in design: What design brings to systems thinking”, which was presented at the RSD3 symposium (2014).
On the cooccurrence of wintertime temperature anomalies over eastern Asia and eastern North America
Authors: Chen Ruyan , Huang Wenyu , Wang Bin , Yang Zifan , Wright Jonathon S. , Ma Wenqian 
Published: June 2017

AbstractThe cooccurrence of wintertime temperature anomalies over eastern Asia and eastern North America is examined. The winter days during 1948–2014 are assigned to nine regimes by applying the self‐organizing map clustering method to the area‐averaged land surface temperature anomalies over these two regions. About half of the winter days are associated with concurrent temperature anomalies. The occurrence of the concurrent/nonconcurrent regimes is closely related to the large‐scale circulation conditions. The Eurasian teleconnection pattern and the Pacific‐North American teleconnection pattern are two dominant large‐scale circulation modes associated with the cooccurrence of the temperature anomalies, through their impacts on the intensities of the corresponding troughs. The precursor analysis reveals that the lead time of the early signals for the concurrent cold anomalies is about 4 days longer than that for the concurrent warm anomalies. In addition, the average lead time of the precursor signals for the wintertime temperature anomalies over eastern Asia is longer than that over eastern North America.
Significant impacts of irrigation water sources and methods on modeling irrigation effects in the ACMELand Model
Authors: Leng Guoyong , Leung L. Ruby , Huang Maoyi 
Published: June 2017

AbstractAn irrigation module considering irrigation water source and irrigation method has been incorporated into the ACME Land Model (ALM). Global numerical experiments were conducted to investigate irrigation effects and their sensitivity to irrigation water sources and irrigation methods. All simulations shared the same irrigation soil moisture target constrained by a global census data set of irrigation amounts. Irrigation has large impacts on terrestrial water balances especially in regions with extensive irrigation. Such effects depend on the irrigation water source: surface water‐fed irrigation decreases runoff and water table depth, while groundwater‐fed irrigation increases water table depth, and increases or decreases runoff depending on the pumping intensity. Irrigation effects also depend significantly on the irrigation method. Flood irrigation applies water in large volumes within short durations, resulting in much larger impacts on runoff and water table depth than drip and sprinkler irrigation. Differentiating the irrigation water source and method is important not only for representing the distinct pathways of how irrigation influences the terrestrial water balances, but also for estimating irrigation water use efficiency. Specifically, groundwater pumping has lower irrigation water use efficiency than irrigation relying on surface water withdrawal only due to enhanced recharge rates. Different irrigation methods also affect water use efficiency, with drip irrigation being the most efficient followed by sprinkler and flood irrigation. Our results highlight the importance of explicitly accounting for irrigation source and irrigation method, which are the least understood and constrained aspects in modeling irrigation water demand, water scarcity, and irrigation effects in Earth System Models.
Shock metamorphism of clay minerals on Mars by meteor impact
Authors: Michalski Joseph R. , Glotch Timothy D. , Friedlander Lonia R. , Darby Dyar M. , Bish David L. , Sharp Thomas G. , Carter John 
Published: June 2017

AbstractA large fraction of clay minerals detected on Mars by infrared remote sensing represent materials exhumed from the subsurface by meteor impact, begging the question of whether the infrared features used to detect the clays are affected by shock associated with the impacts. We used X‐ray diffraction and infrared and Mössbauer spectroscopy to evaluate the mineralogy of five clay minerals after experimentally shocking them to six shock pressures from ~10 to 40 GPa. The shocked clays exhibit three main relevant shock effects: (1) an overall decrease in infrared spectral contrast in the impact‐fragmented materials, (2) oxidation of Fe in ferrous clays, and (3) loss of some spectral structure in relatively well‐ordered clays such as kaolinite. Other than the widespread oxidation of ferrous clays, shock metamorphism likely has little effect on the accurate interpretation of clay mineralogy on Mars from remote sensing data. However, we are able to identify rare cases of extreme shock in some Martian clay deposits.
The role of the Southern Hemisphere semiannual oscillation in the development of a precursor to central and eastern Pacific Southern Oscillation warm events
Authors: Meehl Gerald A. , van Loon Harry , Arblaster Julie M. 
Published: June 2017

AbstractThe semiannual oscillation (SAO) is a twice‐yearly northward movement (in May‐June‐July (MJJ) and November‐December‐January (NDJ)) of the circumpolar trough of sea level pressure (SLP) in the Southern Hemisphere with effects throughout the troposphere. During MJJ the second harmonic of SLP, describing the SAO, has low values of SLP north of 50°S in the subtropical South Pacific, while the first harmonic, which is dominant over the Australian sector, increases to its peak. This once‐a‐year peak in negative SLP gradients (decreasing to the east) between Australia and the ocean to its east extends to the equatorial Pacific. Southern Oscillation warm events since 1950, with an intensification of this seasonal cycle, have larger‐amplitude SST anomalies in the eastern equatorial Pacific in MJJ and during the following mature phase in NDJ. Weak amplification of the seasonal cycle in MJJ tends to be followed by larger‐amplitude SST anomalies in the central equatorial Pacific during NDJ.
Trench motion‐controlled slab morphology and stress variations: Implications for the isolated 2015 Bonin Islands deep earthquake
Authors: Yang Ting , Gurnis Michael , Zhan Zhongwen 
Published: June 2017

AbstractThe subducted old and cold Pacific Plate beneath the young Philippine Sea Plate at the Izu‐Bonin trench over the Cenozoic hosts regional deep earthquakes. We investigate slab morphology and stress regimes under different trench motion histories with mantle convection models. Viscosity, temperature, and deviatoric stress are inherently heterogeneous within the slab, which we link to the occurrence of isolated earthquakes. Models expand on previous suggestions that observed slab morphology variations along the Izu‐Bonin subduction zone, exhibited as shallow slab dip angles in the north and steeper dip angles in the south, are mainly due to variations in the rate of trench retreat from the north (where it is fast) to the south (where it is slow). Geodynamic models consistent with the regional plate tectonics, including oceanic plate age, plate convergence rate, and trench motion history, reproduce the seismologically observed principal stress direction and slab morphology. We suggest that the isolated ~680 km deep, 30 May 2015 Mw 7.9 Bonin Islands earthquake, which lies east of the well‐defined Benioff zone and has its principal compressional stress direction oriented toward the tip of the previously defined Benioff zone, can be explained by Pacific slab buckling in response to the slow trench retreat.
Reawakening of large earthquakes in south central Chile: The 2016 Mw 7.6 Chiloé event
Authors: Ruiz S. , Moreno M. , Melnick D. , del Campo F. , Poli P. , Baez J. C. , Leyton F. , Madariaga R. 
Published: June 2017

AbstractOn 25 December 2016, the Mw 7.6 Chiloé earthquake broke a plate boundary asperity in south central Chile near the center of the rupture zone of the Mw 9.5 Valdivia earthquake of 1960. To gain insight on decadal‐scale deformation trends and their relation with the Chiloé earthquake, we combine geodetic, teleseismic, and regional seismological data. GPS velocities increased at continental scale after the 2010 Maule earthquake, probably due to a readjustment in the mantle flow and an apparently abrupt end of the viscoelastic mantle relaxation following the 1960 Valdivia earthquake. It also produced an increase in the degree of plate locking. The Chiloé earthquake occurred within the region of increased locking, breaking a circular patch of ~15 km radius at ~30 km depth, located near the bottom of the seismogenic zone. We propose that the Chiloé earthquake is a first sign of the seismic reawakening of the Valdivia segment, in response to the interaction between postseismic viscoelastic relaxation and changes of interseismic locking between Nazca and South America.
Coordinated observations of postmidnight irregularities and thermospheric neutral winds and temperatures at low latitudes
Authors: Dao Tam , Otsuka Yuichi , Shiokawa Kazuo , Nishioka Michi , Yamamoto Mamoru , Buhari Suhaila M. , Abdullah Mardina , Husin Asnawi 
Published: June 2017

AbstractWe investigated a postmidnight field‐aligned irregularity (FAI) event observed with the Equatorial Atmosphere Radar at Kototabang (0.2°S, 100.3°E, dip latitude 10.4°S) in Indonesia on the night of 9 July 2010 using a comprehensive data set of both neutral and plasma parameters. We examined the rate of total electron content change index (ROTI) obtained from GPS receivers in Southeast Asia, airglow images detected by an all‐sky imager, and thermospheric neutral winds and temperatures obtained by a Fabry‐Perot interferometer at Kototabang. Altitudes of the F layer (h′F) observed by ionosondes at Kototabang, Chiang Mai, and Chumphon were also surveyed. We found that the postmidnight FAIs occurred within plasma bubbles and coincided with kilometer‐scale plasma density irregularities. We also observed an enhancement of the magnetically equatorward thermospheric neutral wind at the same time as the increase of h′F at low‐latitude stations, but h′F at a station near the magnetic equator remained invariant. Simultaneously, a magnetically equatorward gradient of thermospheric temperature was identified at Kototabang. The convergence of equatorward neutral winds from the Northern and Southern Hemispheres could be associated with a midnight temperature maximum occurring around the magnetic equator. Equatorward neutral winds can uplift the F layer at low latitudes and increase the growth rate of Rayleigh‐Taylor instabilities, causing more rapid extension of plasma bubbles. The equatorward winds in both hemispheres also intensify the eastward Pedersen current, so a large polarization electric field generated in the plasma bubble might play an important role in the generation of postmidnight FAIs.
Energetic ion leakage from foreshock transient cores
Authors: Liu Terry Z. , Angelopoulos Vassilis , Hietala Heli 
Published: June 2017

AbstractEarth's foreshock is filled with backstreaming particles that can interact with the ambient solar wind and its discontinuities to form foreshock transients. Many foreshock transients have a core with low dynamic pressure that can significantly perturb the bow shock and the magnetosphere‐ionosphere system. Foreshock transients have also been recently recognized as sites of particle acceleration, which may be important for seeding the parent shock with energetic particles. A relevant step of this seeding would be energetic ion leakage into the surrounding foreshock environment. On the other hand, such leakage would also suppress the energetic particle flux contrast across foreshock transients' boundaries masking their perceived contribution to ion energization. To further examine this hypothesis of ion leakage, we report on multipoint case studies of three foreshock transient events selected from a large database. The cases were selected to exemplify, in increasing complexity, the nature and consequences of energetic ion leakage. Ion energy dispersion, observed upstream and/or downstream of the foreshock transients, is explained with a simple, ballistic model of ions leaking from the foreshock transients. Larger energies are required for leaked ions to reach the spacecraft as the distance between the transient and spacecraft increases. Our model, which explains well the observed ion energy dispersion and velocity distributions, can also be used to reveal the shape of the foreshock transients in three dimensions. Our results suggest that ion leakage from foreshock transient cores needs to be accounted for both in statistical studies and in global models of ion acceleration under quasi‐parallel foreshock conditions.
Renewable Molecular Flasks with NADH Models: Combination of Light‐Driven Proton Reduction and Biomimetic Hydrogenation of Benzoxazinones
Authors: Zhao Liang , Wei Jianwei , Lu Junhua , He Cheng , Duan Chunying 
Published: June 2017

AbstractUsing small molecules with defined pockets to catalyze chemical transformations resulted in attractive catalytic syntheses that echo the remarkable properties of enzymes. By modulating the active site of a nicotinamide adenine dinucleotide (NADH) model in a redox‐active molecular flask, we combined biomimetic hydrogenation with in situ regeneration of the active site in a one‐pot transformation using light as a clean energy source. This molecular flask facilitates the encapsulation of benzoxazinones for biomimetic hydrogenation of the substrates within the inner space of the flask using the active sites of the NADH models. The redox‐active metal centers provide an active hydrogen source by light‐driven proton reduction outside the pocket, allowing the in situ regeneration of the NADH models under irradiation. This new synthetic platform, which offers control over the location of the redox events, provides a regenerating system that exhibits high selectivity and efficiency and is extendable to benzoxazinone and quinoxalinone systems.