bluuebunny/crossref_metadata_2025 huggingface dataset:
Simultaneous Detection of Different Zika Virus Lineages via Molecular Computation in a Point-of-Care Assay
Authors: Bhadra Sanchita , Saldaña Miguel A. , Han Hannah Grace , Hughes Grant L. , Ellington Andrew D.
Published: December 2018

We have developed a generalizable “smart molecular diagnostic” capable of accurate point-of-care (POC) detection of variable nucleic acid targets. Our isothermal assay relies on multiplex execution of four loop-mediated isothermal amplification reactions, with primers that are degenerate and redundant, thereby increasing the breadth of targets while reducing the probability of amplification failure. An easy-to-read visual answer is computed directly by a multi-input Boolean OR logic gate (gate output is true if either one or more gate inputs is true) signal transducer that uses degenerate strand exchange probes to assess any combination of amplicons. We demonstrate our methodology by using the same assay to detect divergent Asian and African lineages of the evolving Zika virus (ZIKV), while maintaining selectivity against non-target viruses. Direct analysis of biological specimens proved possible, with crudely macerated ZIKV-infected Aedes aegypti mosquitoes being identified with 100% specificity and sensitivity. The ease-of-use with minimal instrumentation, broad programmability, and built-in fail-safe reliability make our smart molecular diagnostic attractive for POC use.
Seasonality Drives Microbial Community Structure, Shaping both Eukaryotic and Prokaryotic Host–Viral Relationships in an Arctic Marine Ecosystem
Authors: Sandaa Ruth-Anne , E. Storesund Julia , Olesin Emily , Lund Paulsen Maria , Larsen Aud , Bratbak Gunnar , Ray Jessica Louise
Published: December 2018

The Arctic marine environment experiences dramatic seasonal changes in light and nutrient availability. To investigate the influence of seasonality on Arctic marine virus communities, five research cruises to the west and north of Svalbard were conducted across one calendar year, collecting water from the surface to 1000 m in depth. We employed metabarcoding analysis of major capsid protein g23 and mcp genes in order to investigate T4-like myoviruses and large dsDNA viruses infecting prokaryotic and eukaryotic picophytoplankton, respectively. Microbial abundances were assessed using flow cytometry. Metabarcoding results demonstrated that seasonality was the key mediator shaping virus communities, whereas depth exerted a diversifying effect within seasonal virus assemblages. Viral diversity and virus-to-prokaryote ratios (VPRs) dropped sharply at the commencement of the spring bloom but increased across the season, ultimately achieving the highest levels during the winter season. These findings suggest that viral lysis may be an important process during the polar winter, when productivity is low. Furthermore, winter viral communities consisted of Operational Taxonomic Units (OTUs) distinct from those present during the spring-summer season. Our data provided a first insight into the diversity of viruses in a hitherto undescribed marine habitat characterized by extremes in light and productivity.
Human Respiratory Syncytial Virus NS 1 Targets TRIM25 to Suppress RIG-I Ubiquitination and Subsequent RIG-I-Mediated Antiviral Signaling
Authors: Ban Junsu , Lee Na-Rae , Lee Noh-Jin , Lee Jong Kil , Quan Fu-Shi , Inn Kyung-Soo
Published: December 2018

Respiratory syncytial virus (RSV) causes severe acute lower respiratory tract disease. Retinoic acid-inducible gene-I (RIG-I) serves as an innate immune sensor and triggers antiviral responses upon recognizing viral infections including RSV. Since tripartite motif-containing protein 25 (TRIM25)-mediated K63-polyubiquitination is crucial for RIG-I activation, several viruses target initial RIG-I activation through ubiquitination. RSV NS1 and NS2 have been shown to interfere with RIG-I-mediated antiviral signaling. In this study, we explored the possibility that NS1 suppresses RIG-I-mediated antiviral signaling by targeting TRIM25. Ubiquitination of ectopically expressed RIG-I-2Cards domain was decreased by RSV infection, indicating that RSV possesses ability to inhibit TRIM25-mediated RIG-I ubiquitination. Similarly, ectopic expression of NS1 sufficiently suppressed TRIM25-mediated RIG-I ubiquitination. Furthermore, interaction between NS1 and TRIM25 was detected by a co-immunoprecipitation assay. Further biochemical assays showed that the SPRY domain of TRIM25, which is responsible for interaction with RIG-I, interacted sufficiently with NS1. Suppression of RIG-I ubiquitination by NS1 resulted in decreased interaction between RIG-I and its downstream molecule, MAVS. The suppressive effect of NS1 on RIG-I signaling could be abrogated by overexpression of TRIM25. Collectively, this study suggests that RSV NS1 interacts with TRIM25 and interferes with RIG-I ubiquitination to suppress type-I interferon signaling.
Assessing Fish Species Tolerance in the Huntai River Basin, China: Biological Traits versus Weighted Averaging Approaches
Authors: Wang Xiao-Ning , Ding Hai-Yu , He Xu-Gang , Dai Yang , Zhang Yuan , Ding Sen
Published: December 2018

Fish species tolerance used as a component of fish-index of biological integrity (F-IBI) can be problematic as it is usually classified using the historical data, data from literature or expert judgments. In this study, fish assemblages, water quality parameters and physical habitat factors from 206 sampling sites in the Huntai River Basin were analyzed to develop tolerance indicator values (TIVs) of fish based on a (Fb-TIVs) and the weighted averaging (WA) method (FW-TIVs). The two quantitative methods for fish tolerance were then compared. The FW-TIVs and Fb-TIVs of fish species were calculated separately using a WA inference model based on ten water quality parameters (WT, pH, DO, SC, TDS, NH3, NO2−, NO3−, TP, Cl−, and SO42−), and six biological traits (lithophilic spawning, benthic invertivores, cold water species, equilibrium or periodic life history strategies, families of Cottidae, and species distribution range). Fish species were then classified into biological traits approach three categories (tolerant species, moderately tolerant species, and sensitive species). The results indicated that only 30.3% fish species have the same classification based on FW-TIVs and Fb-TIVs. However, the proportion of tolerant species based on two methods had a similar response to environmental stress, and these tolerant species were correlated with PCA axes 1 site scores obtained by (FW-TIVs, p < 0.05, R2 = 0.434; Fb-TIVs, p < 0.05, R2 = 0.334) and not correlated with PCA axis 2 site scores (FW-TIVs, p > 0.05, R2 = 0.001; Fb-TIVs, p > 0.05, R2 = 0.012) and PCA axis 3 site scores (FW-TIVs, p > 0.05, R2 = 0.000; Fb-TIVs, p > 0.05, R2 = 0.013). The results of linear regression analyses indicated that Fb-TIVs can be used for the study of fish tolerance. Fish tolerance assessments based on FW-TIVs requires long-term monitoring of fish assemblages and water quality parameters to provide sufficient data for quantitative studies. The Fb-TIV method relies on the accurate identification of fish traits by an ichthyologist. The two methods used in this study can provide methodological references for quantitative studies of fish tolerance in other regions, and are of great significance for the development of biological assessment tools.
Variations in Soil Water Content, Infiltration and Potential Recharge at Three Sites in a Mediterranean Mountainous Region of Baja California, Mexico
Authors: Del Toro-Guerrero Francisco José , Vivoni Enrique R. , Kretzschmar Thomas , Bullock Runquist Stephen Holmes , Vázquez-González Rogelio
Published: December 2018

In this research, we examined temporal variations in soil water content (θ), infiltration patterns, and potential recharge at three sites with different mountain block positions in a semiarid Mediterranean climate in Baja California, Mexico: two located on opposing aspects (south- (SFS) and north-facing slopes (NFS)) and one located in a flat valley. At each site, we measured daily θ between 0.1 and 1 m depths from May 2014 to September 2016 in four hydrological seasons: wet season (winter), dry season (summer) and two transition seasons. The temporal evolution of θ and soil water storage (SWS) shows a strong variability that is associated mainly with high precipitation (P) pulses and soil profile depth at hillslope sites. Results shows that during high-intensity P events sites with opposing aspects reveal an increase of θ at the soil–bedrock interface suggesting lateral subsurface fluxes, while vertical soil infiltration decreases noticeably, signifying the production of surface runoff. We found that the dry soil conditions are reset annually at hillslope sites, and water is not available until the next wet season. Potential recharge occurred only in the winter season with P events greater than 50 mm/month at the SFS site and greater than 120 mm/month at the NFS site, indicating that soil depth and lack of vegetation cover play a critical role in the transport water towards the soil–bedrock interface. We also calculate that, on average, around 9.5% (~34.5 mm) of the accumulated precipitation may contribute to the recharge of the aquifer at the hillslope sites. Information about θ in a mountain block is essential for describing the dynamics and movement of water into the thin soil profile and its relation to potential groundwater recharge.
Hydro-Geochemical Assessment of Groundwater Quality in Aseer Region, Saudi Arabia
Authors: Mallick Javed , Singh Chander Kumar , AlMesfer Mohammed Khaloofah , Kumar Anand , Khan Roohul Abad , Islam Saiful , Rahman Atiqur
Published: December 2018

Saudi Arabia is an arid country with very limited water resources. The absence of surface water bodies along with erratic rainfall renders groundwater as the most reliable source of potable water in arid and semi-arid regions globally. Groundwater quality is determined by aquifer characteristics regional geology and it is extensively influenced by both natural and anthropogenic activities. In the recent past, several methodologies have been adopted to analyze the quality of groundwater and associated hydro-geochemical process i.e., multivariate statistical analysis, geochemical modelling, stable isotopes, a redox indicator, structural equation modelling. In the current study, statistical methods combined with geochemical modelling and conventional plots have been used to investigate groundwater and related geochemical processes in the Aseer region of Saudi Arabia. A total of 62 groundwater samples has been collected and analyzed in laboratory for major cations and anions. Groundwater in the study region is mostly alkaline with electrical conductivity ranging from 285–3796 μS/cm. The hydro-geochemical characteristics of groundwater are highly influenced by extreme evaporation. Climatic conditions combined with low rainfall and high temperature have resulted in a highly alkaline aquifer environment. Principal component analysis (PCA) yielded principal components explaining 79.9% of the variance in the dataset. PCA indicates ion exchange, soil mineralization, dissolution of carbonates and halite are the major processes governing the groundwater geochemistry. Groundwater in this region is oversaturated with calcite and dolomite while undersaturated with gypsum and halite which suggests dissolution of gypsum and halite as major process resulting into high chloride in groundwater. The study concludes that the combined approach of a multivariate statistical technique, conventional plots and geochemical modelling is effective in determining the factors controlling the groundwater quality.
Flow Analysis through Collector Well Laterals: A Case Study from Sonoma County Water Agency, California
Authors: D’Alessio Matteo , Lucio John , Williams Ernest , Warner James , Seymour Donald , Jasperse Jay , Ray Chittaranjan
Published: December 2018

The Sonoma County Water Agency (SWCA) uses six radial collector wells along the Russian River west of Santa Rosa, to provide water for several municipalities and water districts in north-western California. Three collector wells (1, 2, and 6) are located in the Wohler area, and three collector wells (3, 4, and 5) are located in the Mirabel area. The objective of this paper is to highlight the performance of the three collector wells located in the Mirabel area since their construction. The 2015 investigation showed a lower performance of Collectors 3 and 4 compared to their original performances after construction in 1975, while the performance of Collector 5 was relatively stable since 1982. The potential change in capacity could be due to the increase in encrustation observed during the visual inspection of laterals in all three collector wells. Overall, the three collectors are still within the optimal design parameters (screen entrance velocity < 0.305 m min−1 and axial flow velocity of lateral screens < 1.524 m s−1).
How Ångström–Prescott Coefficients Alter the Estimation of Agricultural Water Demand in South Korea
Authors: Jeong Hanseok , Bhattarai Rabin , Hwang Syewoon , Son Jae-Gwon , Jang Taeil
Published: December 2018

The Food and Agriculture Organization (FAO) Penman–Monteith equation, recognized as the standard method for the estimation of reference crop evapotranspiration ( ET 0 ), requires many meteorological inputs. The Ångström–Prescott (A-P) formula containing parameters (i.e., a and b) is recommended to determine global solar radiation, one of the essential meteorological inputs, but may result in a considerable difference in ET 0 estimation. This study explored the effects of A-P coefficients not only on the estimation of ET 0 , but also on the irrigation water requirement (IWR) and design water requirement (DWR) for paddy rice cultivation, which is the largest consumer of agricultural water in South Korea. We compared and analyzed the estimates of ET 0 , IWR, and DWR using the recommended (a = 0.25 and b = 0.5) and locally calibrated A-P coefficients in 16 locations of South Korea. The estimation of ET 0 using the recommended A-P coefficients produced significant overestimation. The overestimation ranged from 3.8% to 14.0% across the 16 locations as compared to the estimates using the locally calibrated A-P coefficients, and the average overestimation was 10.0%. The overestimation of ET 0 corresponded to a variation of 1.7% to 7.2% in the overestimation of the mean annual IWR, and the average overestimation of the IWR was 5.1%. On average, the overestimation was slightly reduced to 4.8% in DWR estimation, since the effect of A-P coefficients on the IWR estimation decreased as the IWR increased. This study demonstrates how the use of A-P coefficients can alter the estimation of ET 0 , IWR, and DWR in South Korea, which underscores the importance of their proper consideration in agricultural water management.
PPCP Monitoring in Drinking Water Supply Systems: The Example of Káraný Waterworks in Central Bohemia
Authors: Hrkal Zbyněk , Eckhardt Pavel , Hrabánková Anna , Novotná Eva , Rozman David
Published: December 2018

The Káraný waterworks supplies drinking water to about one-third of Prague, the capital city of the Czech Republic with a population of more than 1 million. The combination of two technologies—bank infiltration and artificial recharge—are used for production of drinking water. The two-year monitoring of PPCPs (pharmaceuticals and personal care products) at monthly intervals observed temporal changes in 81 substances in the source river and groundwater, and the efficacy of contamination removal depended on the treatment technology used. The results showed a very wide range of PPCPs discharged from the waste water treatment plant at Mladá Boleslav into the Jizera River at concentrations ranging from ng/L to μg/L. Acesulfame and oxypurinol in concentrations exceeding 100 ng/L systematically occurred, and then a few tens of ng/L of carbamazepine, sulfamethoxazole, primidone, and lamotrigine were regularly detected at the water outlet using the artificial recharge for production of drinking water. Bank infiltration was found more efficient in removing PPCP substances at the Káraný locality where none of the monitored substances was systematically detected in the mixed sample.
Addressing Gaps in Environmental Water Policy Issues across Five Mediterranean Freshwater Protected Areas
Authors: Latinopoulos Dionissis , Sidiropoulos Pantelis , Kagalou Ifigenia
Published: December 2018

The increasing pressure on water resources in Europe’s broader area led member states to take measures and adopt a common legislative “umbrella” of directives to protect them. The aim of this research is to investigate practicing deficiencies, information lacks and distances from optimal status as set by the Water Framework Directive and supporting water uses. This contributes to the improvement of the efficiency and harmonization of all environmental goals especially when management of Protected Areas is addressed. Gap analysis, an approach that reveals the distance between current and desired level, was carried out, targeting five Mediterranean hydro-ecosystems, covering three major water policy pillars “Monitoring Practices”, “Management Practices” and “Water Quality and Pressures”. Data for such analyses was collected by literature research supported by a query matrix. The findings revealed a lack in compliance with the Water Framework Directive regarding the “Monitoring Practices” and several deficiencies in sites burdened by eutrophication and human pressures on “Water Quality and Pressures” field. As for “Management Practices”, extra effort should be applied in all hydro-ecosystems to reach the desirable state. We suggest that gap analysis, as a harmonization tool, can unify apparently different areas under the same goals to reveal the extra necessary “investment”.
Combining Chemical Flocculation and Disc Filtration with Managed Aquifer Recharge
Authors: Hägg Kristofer , Cimbritz Michael , Persson Kenneth M.
Published: December 2018

Natural organic matter (NOM) is a growing concern for artificial recharge plants. In the future, it is predicted that warmer climates and more precipitation will cause higher NOM production in lakes and more NOM transport to lakes. This, coupled with increasing drinking water demand due to the population increase, is pushing operators of water treatment plants (WTPs) to find new ways to treat water. In this study, the possibility of reducing the organic load in infiltration basins through a compact pre-treatment technique utilizing microsieves, or disc filters, instead of bulky sedimentation basins and rapid sand filters after chemical flocculation to separate flocs, was investigated. The experiments were conducted using a laboratory-scale flocculator, bench-scale disc filters (10 µm and 40 µm), FeCl3, an anionic synthetic polymer, and water from Lake Vomb, a lake in southern Sweden. Raw water was flocculated using FeCl3 and the polymer, and the filtrated samples were analyzed by measuring UV–VIS absorbance, total organic carbon (TOC), and permeate volume. The results when using 10-µm and 40-µm disc filters demonstrate that it is possible to reduce NOM (by approximately 50%) and separate flocs from raw water. The experiments also highlight the importance of sufficient flocculation times and the use of appropriate polymer dosage to achieve higher permeate volumes and avoid residual polymers in the effluent. In this paper, the possibility of using this technique as a standalone treatment step or as a pre-treatment step in order to manage the aquifer recharge is demonstrated.
Effect of Different Thresholds of Drip Irrigation Using Saline Water on Soil Salt Transportation and Maize Yield
Authors: Li Jingang , Qu Zhongyi , Chen Jin , Wang Fan , Jin Qiu
Published: December 2018

Sustainable development of saline water irrigation was restricted in HID (Hetao Irrigation District) by serious yield reduction and severe salt accumulation without an effective irrigation schedule. Field experiments were carried out to study the effects of drip irrigation thresholds on soil salt transportation and maize yield with shallow saline ground water in 2015 and 2016 in HID. The irrigation was triggered by four soil matric potential (SMP) treatments which measured 20 cm beneath the drip emitter. Results indicate that the shape of the wetting body approximated a one-fourth ellipse on the vertical profile perpendicular to the drip line, while the horizontal radius increased with the increase of SMP. Moreover, salt accumulation decreased with the increasing thresholds in the 0–40-cm layer, while the soil salt in the 40–100 cm layer was hardly affected by SMP thresholds under a drip irrigation quota of 22.5 mm. Maize yield showed a quadratic relationship with the SMP threshold, and the irrigation water use efficiency (IWUE) showed a linear increase in response to the decrease in SMP threshold. Taking into account the salt accumulation, yield and IWUE, a SMP threshold higher than −30 kPa is suggested as the appropriate indicator for maize mulched-drip irrigation with shallow saline groundwater in HID.
Hydrochemical Changes and Influencing Factors in the Dongkemadi Region, Tanggula Range, China
Authors: Han Tianding , Li Yuping , Qin Jia , Li Xiangying , Yang Qin , He Xiaobo
Published: December 2018

In order to detect the source and controlling factors of hydrochemical ions in glacier meltwater-recharged rivers, the chemical characteristics of the river water, precipitation, and meltwater of the Dongkemadi River Basin, China, in 2014 (from May to October) were systematically analyzed, and combined with the hydrological and meteorological data. The results show that the hydrochemical pattern of the typical river was HCO3−-Ca2+. The most cations were Ca2+ and Mg2+, and the predominant anions were HCO3− and SO42−, in the river. The concentration of major ions and total dissolved solids (TDS) in the river water were much larger than that in the precipitation and meltwater. The TDS concentration was ordered: River water > precipitation > meltwater. The water-rock interaction and the dilution effect of the precipitation and meltwater on the runoff ions resulted in a negative correlation between the ion concentration of the river water and the river flow. The chemical ions of the river runoff mainly originated from rock weathering and the erosion (abrasion) caused by glacier movement. In addition, the contributions of different sources to the dissolved components of the Dongkemadi River were ordered: Carbonate (75.8%) > silicate (15.5%) > hydatogenic rock (5.7%) > atmospheric precipitation (3%), calculated by a forward geochemical model. And the hydrochemical weathering rates of carbonate and silicate minerals were 12.30 t·km−2·a−1 and 1.98 t·km−2·a−1, respectively. The CO2 fluxes, consumed by the chemical weathering of carbonate and silicate, were 3.28 × 105 mol·km−2·a−1 and 0.91 × 105 mol·km−2·a−1, respectively.
Vortex Cascade Features of Turbulent Flow in Hydro-Turbine Blade Passage with Complex Geometry
Authors: Hu Xiucheng , Zhang Lixiang
Published: December 2018

A large-eddy simulation of three-dimensional turbulent flow for a hydro-turbine in the transitional process of decreasing load from rated power to no-load has been implemented by using ANSYS-Fluent in this paper. The survival space occupied by different scale flow structures for the different guide vane opening degrees was well captured. The flow characteristics in the transitional process were obtained. Different forms of the channel vortex were studied. The features of the vortex cascade and dissipation of the turbulent energy in blade passage were analyzed. The results show that the scales of the vortex structures have a large change in the transitional process of rejecting load, and the vortex distributions in the blade passage are significantly distinguished. The survival space of the different scale eddies in the blade passage is closely related to the scales of the vortex. The survival volume ratio of the adjacent scale vortex in the runner is about 1.2–1.6. The turbulent kinetic energy and eddy viscosity increase rapidly along the blade passage with the small-scale eddies going up, which implies that a dissipating path for the energy in the blade passage is formed.
Water Demand Framework and Water Development: The Case of China
Authors: Wang Yahua , Wan Tingting , Tortajada Cecilia
Published: December 2018

Water resources management is increasingly important for sustainable economic and social development. A coherent division of the development stages is of primary importance for selecting and implementing related water resource management strategies. Using evolving supply–demand relationships, this paper proposes a framework that considers water development stages to present a series of dynamic relationships between water demand changes and overall economic development. The framework is applied to China to advance the understanding of how demand evolves at different stages of water resources development under specific socioeconomic circumstances, and of strategic choices in general. The case of China explains how water resources management has gradually improved during distinct socioeconomic development stages. It illustrates the varieties and effectiveness of water policies made to adapt to changing demand over the course of socioeconomic development. The framework can be potentially applied to other countries or regions to identify the development stage in order to select proper water management strategies.
Behavior of Organic Micropollutants During River Bank Filtration in Budapest, Hungary
Authors: Nagy-Kovács Zsuzsanna , László Balázs , Fleit Ernő , Czichat-Mártonné Katalin , Till Gábor , Börnick Hilmar , Adomat Yasmin , Grischek Thomas
Published: December 2018

This paper summarizes results from a half-year sampling campaign in Budapest, when Danube River water and bank filtrate were analyzed for 36 emerging micropollutants. Twelve micropollutants were detected regularly in both river water and bank filtrate. Bisphenol A, carbamazepine, and sulfamethoxazole showed low removal (<20%) during bank filtration on Szentendre Island and Csepel island, whereas 1H-benzotriazole, tolyltriazole, diclofenac, cefepime, iomeprol, metazachlor, and acesulfame showed medium to high removal rates of up to 78%. The concentration range in bank filtrate was much lower compared to river water, proving the equilibration effect of bank filtration for water quality.
A new bioinspired method for pressure and flow sensing based on the underwater air-retaining surface of the backswimmer Notonecta
Authors: Mail Matthias , Klein Adrian , Bleckmann Horst , Schmitz Anke , Scherer Torsten , Rühr Peter T , Lovric Goran , Fröhlingsdorf Robin , Gorb Stanislav N , Barthlott Wilhelm
Published: December 2018

In technical systems, static pressure and pressure changes are usually measured with piezoelectric materials or solid membranes. In this paper, we suggest a new biomimetic principle based on thin air layers that can be used to measure underwater pressure changes. Submerged backswimmers (Notonecta sp.) are well known for their ability to retain air layers on the surface of their forewings (hemelytra). While analyzing the hemelytra of Notonecta, we found that the air layer on the hemelytra, in combination with various types of mechanosensitive hairs (clubs and pins), most likely serve a sensory function. We suggest that this predatory aquatic insect can detect pressure changes and water movements by sensing volume changes of the air layer under water. In the present study, we used a variety of microscopy techniques to investigate the fine structure of the hemelytra. Furthermore, we provide a biomimetic proof of principle to validate our hypothesis. The suggested sensory principle has never been documented before and is not only of interest for sensory biologists but can also be used for the development of highly sensitive underwater acoustic or seismographic sensory systems.
ANALYSING LOCATION ATTRIBUTES WITH A HEDONIC MODEL FOR APARTMENT PRICES IN DONETSK, UKRAINE
Authors: Kryvobokov Marko , Wilhelmsson Mats
Published: December 2018

A hedonic model is specified for asking prices for apartments in Donetsk (Ukraine). This model is used to determine statistically significant location attributes. These attributes can be used for land assessment in a city where data on the land market are lacking. Distance gradients for CBD accessibility are investigated in different geographical directions. Separate models are created for sub‐samples located inside and outside the city centre. A spatial weight matrix is used to detect spatial autocorrelation. The regression results are compared with the valuation of experts.

Vietos atributų analizė su hedonistiniu modeliu siekiant nustatyti butų kainas Donceke (Ukraina)

Santrauka

Apibrėžtas hedonistinis modelis, leidžiantis nustatyti butu kainas Donecke (Ukraina). Pagal ši modeli nustatomi statistiškai reikšmingi vietos atributai. Šiuos atributus galima naudoti vertinant sklypus mieste, kur trūksta duomenų apie žemes rinka. Nagrinėjami atstumo gradientai siekiant įvertinti prieiga prie centriniu verslo rajonu įvairiomis geografinėmis kryptimis. Sukurti modeliai bandomiesiems objektams, esantiems miesto centre ir už jo. Remiantis erdves svorine matrica, nustatoma erdves autokoreliacija. Regresijos rezultatai lyginami su ekspertu vertinimais.
PROBLEMS OF ADAPTING ENTERPRISES IN THE STRATEGY IMPLEMENTATION PROCESS. CASE OF POLAND
Authors: Noga Gracjana
Published: December 2018

Purpose – The purpose of the article was to analyse the impact of the enterprise adaptation stage on implemented strategy effectiveness.

Research methodology – In the theoretical part the method of analysis and critical review of the literature was used. The technique used in the empirical study was paper-and-pencil interviewing (PAPI). In order to investigate relationships, the χ2 Pearson test and the Yule’s Coefficient of Association ϕ were employed.

Findings – The article resulting underline the importance of the stage of adapting the enterprise in the strategy implementation process. The organisational structure, skills and knowledge, as well as organisational culture, have a particularly strong impact on the effectiveness of the strategy. Research has not confirmed any relationship between management style and resources.

Research limitations – The empirical research was carried out on business organisations from a ranking of 500 innovative businesses of the Institute of Economics of the Polish Academy of Sciences list, what does not ensure that the indicated problems are characteristic for the average companies active in Poland.

Practical implications – The obtained results became the basis for defining recommendations, which are practical guidelines for those trying to implement a strategy. It should be noted that the presented practical guidelines are not static research indications and will develop as the organisation and its environment change.

Originality/Value – There is a lack of research in Poland, which is focused on the problem of adjusting enterprise in the strategy implementation.
Gravitational-wave Geodesy: A New Tool for Validating Detection of the Stochastic Gravitational-wave Background
Authors: Callister T. A. , Coughlin M. W. , Kanner J. B.
Published: December 2018

A valuable target for advanced gravitational-wave detectors is the stochastic gravitational-wave background. The stochastic background imparts a weak correlated signal into networks of gravitational-wave detectors, and so standard searches for the gravitational-wave background rely on measuring cross-correlations between pairs of widely separated detectors. Stochastic searches, however, can be affected by any other correlated effects that may also be present, including correlated frequency combs and magnetic Schumann resonances. As stochastic searches become sensitive to ever-weaker signals, it is increasingly important to develop methods to separate a true astrophysical signal from other spurious and/or terrestrial signals. Here, we describe a novel method to achieve this goal—gravitational-wave geodesy. Just as radio geodesy allows for the localization of radio telescopes, so too can observations of the gravitational-wave background be used to infer the positions and orientations of gravitational-wave detectors. By demanding that a true observation of the gravitational-wave background yield constraints that are consistent with the baseline’s known geometry, we demonstrate that we can successfully validate true observations of the gravitational-wave background while rejecting spurious signals due to correlated terrestrial effects.
Calibrating the James Webb Space Telescope Filters as Star Formation Rate Indicators
Authors: Senarath Madhooshi R. , Brown Michael J. I. , Cluver Michelle E. , Moustakas John , Armus Lee , Jarrett Thomas H.
Published: December 2018

We have calibrated the 6.5 m James Webb Space Telescope (JWST) mid-infrared (MIR) filters as star formation rate (SFR) indicators, using JWST photometry synthesized from Spitzer spectra of 49 low-redshift galaxies, which cover a wider luminosity range than most previous studies. We use Balmer-decrement-corrected Hα luminosity and synthesized MIR photometry to empirically calibrate the Spitzer, WISE, and JWST filters as SFR indicators. Our Spitzer and WISE calibrations are in good agreement with recent calibrations from the literature. While MIR luminosity may be directly proportional to SFR for high-luminosity galaxies, we find a power-law relationship between MIR luminosity and SFR for low-luminosity galaxies (

). We find that for galaxies with an Hα luminosity of

(corresponding to an SFR of

), the corresponding JWST MIR ν L

ν
luminosity is between 1040.50 and

. Power-law fits of JWST luminosity as a function of Hα luminosity have indices between 1.17 and 1.32. We find that the scatter in the JWST filter calibrations decreases with increasing wavelength from 0.39 to 0.20 dex, although F1000W is an exception where the scatter is just 0.24 dex.
Santiago en Santiago. Desde una devoción religioso-militar hacia una celebración cortesano-cívica
Authors: Sanfuentes Olaya
Published: December 2018

El artículo despliega las principales características y el itinerario de la más importante fiesta de la época virreinal en Santiago de Nueva Extremadura: la de Santiago Apóstol, patrono de la ciudad. Como una continuación del espíritu de la conquista peninsular, la imagen de Santiago ecuestre y las prácticas rituales de corte militar se instalan en este territorio donde tienen que compartir protagonismo —en el espacio festivo— con los símbolos y prácticas asociadas a la figura del rey. A lo largo del tiempo, las prácticas van modificándose acordes a los cambios sociales y a los mandatos desde el poder. Finalmente, la devoción decae hasta prácticamente desaparecer.
La lucha de Álvar Núñez Cabeza de Vaca por un discurso validador que confirme su «estatus de cristiano verdadero» como esclavo/cautivo en La Relación (1542)
Authors: Sánchez Ramón
Published: December 2018

Basado en el manuscrito La Relación (1542) de Cabeza de Vaca, este artículo analiza cómo su discurso, durante el contexto en el que se encuentra cautivo, construye dos clases de cristianos: los falsos y los verdaderos. El trabajo utiliza el concepto de superaddressee de Mikhail Bakhtin, que en un diálogo subordina todo a su definición contextual.
Cotidianidad en el Caribe colonial, 1590-1620
Authors: Burset Flores Luis Rafael
Published: December 2018

En la correspondencia oficial de los funcionarios reales de la Corona española a finales del siglo XVI y principios del XVII encontramos referencias a situaciones de vida diaria y a particularidades de los habitantes de la región de lo que se conocerá como la Cuenca del Caribe. Las costumbres, actitudes o actividades diarias que se reportaban estaban recogidas en la referencia a algún evento de relevancia para el gobierno del imperio o de la colonia. Aunque se emiten desde un punto de vista oficialista, éstas nos ayudan a descubrir rasgos distintivos de estos pueblos. Otros aspectos de la cotidianidad son reportados por individuos que participaron en ellos, aunque planteados en función de una solicitud de mercedes. Este ensayo recoge algunos de esos aspectos de la vida diaria en el Caribe reflejados en las descripciones recogidas en la correspondencia con el rey y el Consejo de Indias.
Disciplinando a los curas: Inmunidad personal del clero y control real en el virreinato del Perú, 1755-1775
Authors: Huarcaya Sergio Miguel
Published: December 2018

En las últimas décadas del siglo XVIII, la corona borbónica se empeñó en socavar la inmunidad personal del clero. Examinando dos atropellamientos a autoridades reales por parte de curas doctrinarios, esta investigación analiza la capacidad de maniobra política de la Corona y la Iglesia en el virreinato del Perú, antes de la promulgación de limitaciones legales a tal exención. Una de las víctimas fue el gobernador político y militar de Tarma, quien estaba a cargo de reprimir la rebelión india de Juan Santos Atahualpa. A pesar de no lograr que el tribunal eclesiástico castigue satisfactoriamente a los curas, la Corona aprovechó la disputa para fortificar una posición regalista.
Nature Inspired Computing for Wireless Networks Applications
Authors: Hatti Daneshwari I. , Sutagundar Ashok V.
Published: December 2018

Nature inspired computing (NIC) is a computing paradigm inspired by the attractive behavior of nature. NIC has influenced the researchers to perform optimization in many approaches using physics/chemistry-based algorithms and biology-based algorithms. Physics/chemistry-based algorithms include the water cycle, a galaxy base, or gravitational-based algorithms. Biology-based algorithms, namely bio-inspired and swarm intelligence-related algorithms are discussed with their importance in the field of wireless networks. A wireless network such as MANET's, VANET, AdHoc, and IoT are playing a vital role in all sectors. Some of the issues such as finding the optimal path in routing, clustering, dynamic allocation of motes, energy and lifetime of the network pertaining to a wireless network can be solved using an NIC approach. Algorithms derived by the inspiration from nature are discussed briefly in this article.
Similarities and Differences in Learning of Metacognitive Skills
Authors: Yong Su Ting , Gates Peter , Chan Andy Tak-Yee
Published: December 2018

This article explores the potential use metacognitive skills learned in computer games to teach mathematics. This study explored the similarities and differences in the learning of metacognitive skills between computer games and mathematics education. A mixed-methods approach was employed in which a quantitative survey (students, n=174) and a qualitative interview (six mathematics teachers, eight students) were administered to concurrently at two secondary schools in Malaysia. Data collected has shown that there is no direct and explicit connection between the two learning contexts. In computer games, pupils could learn: (a) multitasking, (b) land navigation, (c) teamwork, (d) bottom-up approach to problem solving, and (e) concentration skills. However, it is understandable that a mathematics education (a) is single-tasking, e.g. solves problems step-by-step, (b) uses graphic representation, (c) involves collaborative learning, (d) follows top-down approach to problem-solving, and (e) could use multiple sensory modalities to ameliorate learning.
Game-Based Learning to Engage Students With Physics and Astronomy Using a Board Game
Authors: Cardinot Adriana , Fairfield Jessamyn A.
Published: December 2018

In this research article, the authors developed a novel astronomy board game and examined how this approach could facilitate the learning and teaching of astronomy topics covered in the new Irish Science Syllabus. A total of 119 post-primary students took part in the pilot trial across Ireland. Data was collected via feedback questionnaires, systematic observations and pre and post-test surveys. Results indicate that this astronomy board game significantly enhances students' knowledge of astronomy concepts and perceptions of scientists. Furthermore, teachers showed positive attitudes towards this approach for teaching astronomy. Additionally, the game was demonstrated as a useful learning tool and as an activity to promote social skills. The findings offer a promising basis for further exploration of the integration of game-based approaches to physics education to promote active participation and interaction, balancing the learning objectives with play.
Polish mathematicians and mathematics in World War I. Part I: Galicia (Austro-Hungarian Empire)
Authors: Domoradzki Stanisław , Stawiska Małgorzata
Published: December 2018

In this article we present diverse experiences of Polish mathematicians (in a broad sense) who during World War I fought for freedom of their homeland or conducted their research and teaching in difficult wartime circumstances. We discuss not only individual fates, but also organizational efforts of many kinds (teaching at the academic level outside traditional institutions, Polish scientific societies, publishing activities) in order to illustrate the formation of modern Polish mathematical community.In Part I we focus on mathematicians affiliated with the existing Polish institutions of higher education: Universities in Lwów in Kraków and the Polytechnical School in Lwów, within the Austro-Hungarian empire.
The works of the Institute of Metallurgy and Metallurgical Sciences at the Warsaw University of Technology, and the person of Jan Czochralski
Authors: Majewski Mariusz W.
Published: December 2018

The article discusses the issues of implementation of important achievements in the field of metallurgy (including armored weapons, fortifications and the navy), under the supervision of prof. Jan Czochralski, who played an important role in the development of the armed forces of the Second Polish Republic.At the same time, it has been noted that the activities of the institutes were conditioned by the poor development of non-ferrous metallurgy, which contributed to delays in the development of technical thinking in the field of aviation and combustion engines, an important element of the armed forces.
O teorii i filozofii prawa Leona Petrażyckiego
Authors: Woleński Jan
Published: December 2018

Leon Petrażycki był przede wszystkim teoretykiem prawa, jednym z najwybitniejszych w XX w. Wypowiadał się na wiele innych tematów, w szczególności filozoficznych, metodologicznych, psychologicznych i socjologicznych. W każdej z tych dziedzin głosił poglądy niebanalne i warte uwagi, nie tylko w świetle horyzontów poznawczych jego czasów, ale również z dzisiejszego punktu widzenia. Idea polityki prawa, tj. rozważania i przewidywania społecznych skutków prawa, ma szczególną doniosłość.
A rebuttal of recent arguments for Maragha influence on Copernicus
Authors: Blåsjö Viktor
Published: December 2018

I reply to recent arguments by Peter Barker & Tofigh Heidarzadeh, Arun Bala, and F. Jamil Ragep claiming that certain aspects Copernicus’s astronomical models where influenced by late Islamic authors connected with the Maragha school. In particular, I argue that: the deleted passage in De revolutionibus that allegedly references unspecified previous authors on the Tusi couple actually refers to a simple harmonic motion, and not the Tusi couple; the arguments based on lettering and other conventions used in Copernicus’s figure for the Tusi couple have no evidentiary merit whatever; alleged indications that Nicole Oresme was aware of the Tusi couple are much more naturally explained on other grounds; plausibility considerations regarding the status of Arabic astronomy and norms regarding novelty claims weight against the influence thesis, not for it.
Sprawozdanie Komisji Historii Nauki PAU w 2017/2018 roku
Authors: Kokowski Michał
Published: December 2018

The report discusses the activities of the Commission on the History of Science of the Polish Academy of Arts and Sciences in 2017/2018. It presents the lists of: scientific meetings, new members, new publications, and members who have died.
Bibliography of the works by Piotr Flin (1945–2018), an astronomer and exact sciences historian
Authors: Kokowski Michał
Published: December 2018

The bibliography presents the list of publications by Piotr Flin (1945–2018), an astronomer and exact sciences historian.
Espacios culturales y territorio. Propuesta de una metodología para fomentar la participación ciudadana: El caso de barrio del Carmen y el Museo de la Universidad de Murcia
Authors: Castejón Ibáñez Magdalena , Guirao Mirón Cristina
Published: December 2018

El texto que se presenta tiene como objetivo plantear una propuesta metodológica para lograr crear un vínculo entre museos y territorio a partir de la participación ciudadana. Dicho método ha sido desarrollado y experimentado con éxito como parte de una investigación dentro del Programa de Doctorado en Educación de la Universidad de Murcia, en el contexto del Museo de Bellas Artes de Murcia y su entorno. Como conclusión a los resultados obtenidos se propone la adaptación de dicho método participativo a otro territorio de la ciudad: el barrio del Carmen y el Museo de la Universidad de Murcia, en el que se emplearán distintas técnicas de recogida de información como el cuestionario cuantitativo, la entrevista semiestructurada y el grupo de discusión.
Production of particulate brown carbon during atmospheric aging of residential wood-burning emissions
Authors: Kumar Nivedita K. , Corbin Joel C. , Bruns Emily A. , Massabó Dario , Slowik Jay G. , Drinovec Luka , Močnik Griša , Prati Paolo , Vlachou Athanasia , Baltensperger Urs , Gysel Martin , El-Haddad Imad , Prévôt André S. H.
Published: December 2018

Abstract. We investigate the optical properties of light-absorbing organic carbon
(brown carbon) from domestic wood combustion as a function of simulated
atmospheric aging. At shorter wavelengths (370–470 nm), light absorption by
brown carbon from primary organic aerosol (POA) and secondary organic
aerosol (SOA) formed during aging was around 10 % and 20 %,
respectively, of the total aerosol absorption (brown carbon plus black
carbon). The mass absorption cross section (MAC) determined for black carbon
(BC, 13.7 m2 g−1 at 370 nm, with geometric standard deviation GSD =1.1) was consistent with that
recommended by Bond et al. (2006). The corresponding MAC of POA
(5.5 m2 g−1; GSD =1.2) was higher than that of SOA
(2.4 m2 g−1; GSD =1.3) at 370 nm. However, SOA presents a
substantial mass fraction, with a measured average SOA ∕ POA mass ratio
after aging of ∼5 and therefore contributes significantly to the
overall light absorption, highlighting the importance of wood-combustion SOA
as a source of atmospheric brown carbon. The wavelength dependence of POA and
SOA light absorption between 370 and 660 nm is well described with
absorption Ångström exponents of 4.6 and 5.6, respectively.
UV-visible absorbance measurements of water and methanol-extracted OA were
also performed, showing that the majority of the light-absorbing OA is water
insoluble even after aging.