Miracle-dz/UniFAR-FTUs huggingface dataset:
A Throughput-Oriented NVMe Storage Virtualization With Workload-Aware Management

Storage virtualization is an important component of large-scale online services in multi-tenant clouds. It typically shares the physical storage among guest machines and performs transactional operations for high-performance data processing. However, even with the recent mediated pass-through virtualization optimization, the operations of multi-tenant storage I/O meet the bottleneck, and thus degrade the throughput performance of the cloud storage services. We observe that the root cause of the problem is the unawareness of varying and imbalanced workload inefficiency of resource management in the multi-tenant cloud storage setting. In this paper, we present FinNVMe, a new throughput-oriented NVMe storage virtualization management mechanism, that (1) passes-through I/O performance-critical resources and emulates privileged resources to provide high throughput in a workload-aware manner among multi-tenant VMs, (2) enables fine-grained scheduling for I/O resources to achieve promising flexibility and scalability with respective to virtualization, and (3) adopts the queue binding and the queue shuffling to reduce the virtualization and management overhead, and involves active polling for further I/O acceleration. This article subsequently evaluates FinNVMe with micro benchmarks on two typical scenarios (both balanced and imbalanced workload) and the real-world storage workloads to show its high throughput performance, along with the flexibility and scalability of virtualization and resource management. For example, FinNVMe achieves up to 20 percent throughput improvement with more stable latency in the varying and imbalanced workload.
Modified method for measuring acid phosphatase activities in forest soils with high organic matter content

Abstract The acid phosphatase activity (APA) is a key factor in phosphorus (P), mineralization, P nutrition of plants, and P cycling. However, the widely used method of Tabatabai and Bremner for APA determinations is seriously restricted in soils with high organic matter contents, owing to interference in photometric detection by dissolved organic matter. The objectives of this study were: A) to modify the procedure of Tabatabai and Bremner with a view to its application to forest soils rich in organic carbon, b) to determine APA contents in forest soils of the Sierra de Gata mountains, and c) to establish relationships between the APA with different soil parameters. The modified procedure was well adapted to forest soils with high organic matter contents and had good reproducibility, while maintaining the relative simplicity and accuracy of the original Tabatabai and Bremner procedure. APA in the forest soils studied was high but did not correlate with labile P. The APA in the soils studied depended principally on availability of readily degradable energy sources and soil nitrogen (N).
Synthesis and Derivatization of the Bis(amido)‐λ3‐cyclodiphosphazanes cis‐[R′(H)NP(μ‐NR)]2, Including a Rare Example, trans‐[tBu(H)N(Se)P(μ‐NCy)]2, Showing Intermolecular Se···H–O Hydrogen Bonding

The reaction of PCl3 with CyNH2 in a 1:3 ratio affordedthe dichloro-λ3-cyclodiphosphazane, cis-[ClP(μ-NCy)]2 (2), whereas the corresponding 1:5 reaction gave the bis(amido)-λ3-cyclodiphosphazane cis-[Cy(H)NP(μ-NCy)]2 (3) in quantitative yield. The dichloro derivative 2 was converted into 3 by reacting 2 with four equivalents of CyNH2. The mixed (amido)derivatives cis-[tBu(H)NP(μ-NCy)]2 (4) and cis-[Cy(H)NP(μ-NtBu)]2 (5) were prepared from the reaction of cis-[ClP(μ-NCy)]2 (2) and cis-[ClP(μ-NtBu)]2 (1a) with a fourfold excess of the respective primary amines. The oxidation of the bis(amido)-λ3-cyclodiphosphazanes 3–5 with two equivalents of H2O2/H2O, S8, and Se8 produced the bis(oxo) [R′(H)N(O)P(μ-NR)]2 [R = R′ = Cy (6); R = tBu, R′ = Cy (7); R = Cy, R′ = tBu (8)], bis(sulfide) [R′(H)N(S)P(μ-NR)]2 [R = R′ = Cy (9); R = tBu, R′ = Cy (10); R = Cy, R′ = tBu (11)], and bis(selenide) [R′(H)N(Se)P(μ-NR)]2 [R = R′ = Cy (12); R = tBu, R′ = Cy (13); R = Cy, R′ = tBu (14)] derivatives, respectively. The reaction of cis-[R(H)NP(μ-NtBu)]2 with two equivalents of phosphoryl azide, [N3P(O)(OPh)2], afforded the corresponding bis(iminophosphoryl) derivatives, cis-{R(H)N[(OPh)2P(O)N]P(μ-NtBu)}2 [R = tBu (15), R = Ph (16), R = Cy (17)]. The solid-state structures for 11, 12, 13, and 15 were determined by single-crystal X-ray diffraction studies. Interestingly, the bis(selenide) derivative [tBu(H)N(Se)P(μ-NCy)]213 turned out be a trans isomer in the solid state, whereas the other cyclodiphosphazane derivatives exhibited the cis geometry. Compounds 13 and 15 crystallized along with a water molecule that facilitated the intermolecular Se···H–O and N···H–O hydrogen bonding, respectively, to form a linear 1D hydrogen bonding network.
Evaluation of Genetic Diversity in Iranian Violet (Viola spp) Populations Using Morphological and RAPD Molecular Markers

Recognition of genetic reserves and desirable genes is the basis of breeding programs. So far, in Iran, due to the lack of recognition of genetic resources, a considerable breeding program has not been done on native plants. The study of the genetic diversity of violets as a native plant with ornamental and medicinal uses is the great importance in advancing the breeding goals of this plant. So, in the present study, nine populations of Viola spp . from different regions of Iran were used for evaluation of inter and intra-population genetic diversity with RAPD marker, and eight populations of them were used to evaluate morphological, vegetative, and reproductive characteristics. From 11 used primers, 145 bands which showed high resolution and their length was between 250 to 3000 base pairs, were counted and used for RAPD analysis. According to the cluster analysis using the JACCARD similarity coefficient and UPGMA method, significant differences were found among populations. Molecular analysis of variance showed 77 and 23% inter and intra population genetic diversity, respectively. Principal component analysis classified effective characteristics in 6 groups which justified 89.62% of total changes and in the cluster analysis of morphological traits, populations were classified into three groups in distance 10. The results of our molecular and morphological analysis showed considerable diversity among violet populations in Iran, which can be used in future breeding programs.
F-CENTRES OF TWO TYPES IN BaFCl CRYSTALS.

F-centres in X-irradiated and additively coloured tetragonal BaFCl single crystals have been studied. An F-centre at a fluorine site absorbs light polarized parallel to the crystallographic c-axis in a band at 438 nm and light polarized perpendicular to c in a band at 550 nm. A chlorine F-centre has a band at 532 nm (E ‖ c) and a double band at 440 nm (E ‖ c). This dichroism arises from the tetragonal surroundings of the F-centres. The splitting of the double bands is probably due to a dynamic Jahn-Teller effect. In an X-irradiated crystal there is a partial transformation of fluorine into chlorine F-centres. In additively coloured BaFCl predominantly fluorine type F-centres are formed above 300 °C in thermal equilibrium. F-Zentren in gerontgten und additiv verfarbten tetragonalen BaFCl-Einkristallen wurden untersucht. Ein F-Zentrum auf einem F-Platz absorbiert parallel zur kristallographischen c-Achse polarisiertes Licht in einer Bande bei 438 nm und senkrecht dazu polarisiertes Licht in einer Doppelbande bei 550 nm. Ein F-Zentrum auf einem Cl− Platz hat eine Bande bei 532 nm (E ‖ c) und eine Doppelbande bei 440 nm (E ‖ c). Dieser Dichroismus wird durch die tetragonale Gitterumgebung bewirkt. Die Aufspaltung der Doppelbande ist wahrscheinlich die Folge eines dynamischen Jahn-Teller-Effektes. In einem gerontgten Kristall wird eine teilweise Umwandlung von F(F−)- in F(Cl−)-Zentren beobachtet. In additiv verfarbtem BaFCl werden im thermischen Gleichgewicht oberhalb 300 °C fast ausschlieslich F(F−)-Zentren gefunden.
An Enhanced IEEE 33 Bus Benchmark Test System for Distribution System Studies

The transformation of passive distribution systems to more active ones thanks to the increased penetration of distributed energy resources, such as dispersed generators, flexible demand, distributed storage, and electric vehicles, creates the necessity of an enhanced test system for distribution systems planning and operation studies. The value of the proposed test system, is that it provides an appropriate and comprehensive benchmark for future researches concerning distribution systems. The proposed test system is developed by modifying and updating the well-known 33 bus distribution system from Baran & Wu. It comprises both forms of balanced and unbalanced three-phase power systems, including new details on the integration of distributed and renewable generation units, reactive power compensation assets, reconfiguration infrastructures and appropriate datasets of load and renewable generation profiles for different case studies.
Entrepreneurial Orientation and Family Firm Performance: The Moderating Role of TMT Identity-Based and Knowledge-Based Faultlines

Research has shown that entrepreneurial orientation (EO) is positively associated with performance, but several context-specific features and contingencies affect this relationship. Accordingly, this article focuses on the specific context of family firms (FFs) and introduces top management team (TMT) faultlines as moderators. The main findings, obtained on a sample of 111 medium- and large-sized FFs, suggest that strong identity-based faultlines (IBFs) negatively moderate the EO–FF performance relationship, even within TMTs that are comprised only of family members, which are often viewed as homogeneous teams. Conversely, strong knowledge-based faultlines (KBFs) amplify the positive effect of EO on FF performance.
Brownian simulations of a network of reptating primitive chains

A new model for Brownian dynamics simulations of entangled polymeric liquids is proposed here. Chains are coarse grained at the level of segments between consecutive entanglements; hence, the system is in fact a network of primitive chains. The model incorporates not only the “individual” mechanisms of reptation and tube length fluctuation, but also collective contributions arising from the 3D network structure of the entangled system, such as constraint release. Chain coupling is achieved by fulfilling force balance on the entanglement nodes. The Langevin equation for the nodes contains both the tension in the chain segments emanating from the node and an osmotic force arising from density fluctuations. Entanglements are modeled as slip links, each connecting two chain strands. The motion of monomers through slip links, which ultimately generates reptation as well as tube length fluctuations, is also described by a suitable Langevin equation. Creation and release of entanglements is controlled by the num.
Effect of two neem-derived pesticides on Colorado potato beetle (Leptinotarsa decemlineata Say) (Coleoptera: Chrysomelidae) under laboratory conditions

Mortality and antifeedant activity of two different neem-derived pesticides were investigated on larvae of Colorado potato beetle (Leptinotarsa decemlineata Say). In no-choice tests, mortality of larvae increased with increase in time period, meanwhile the feeding damage decreased with the increase of neem leaf extract concentration in contrast to NeemAzal T/S (1% azadirachtin) in which neither there was any significant difference in mortality nor on feeding damage. In the choice test, none of the treatments were lethal to the larvae tested. The larvae fed on the leaves irrespective of the treatment.
Wideband Channel Tracking and Hybrid Precoding for mmWave MIMO Systems

A major source of difficulty when operating with large arrays at millimeter wave (mmWave) frequencies is to estimate the wideband channel, since the use of hybrid architectures acts as a compression stage for the received signal. Moreover, the channel has to be tracked and the antenna arrays regularly reconfigured to obtain appropriate beamforming gains when a mobile setting is considered. In this paper, we focus on the problem of channel tracking for frequency-selective mmWave channels, and propose two novel channel tracking algorithms. One of them exploits the sparsity of the mmWave channel, while the other one leverages prior statistical information about the channel parameters. We also propose a hybrid precoder and combiner design method to increase the received signal-to-noise ratio (SNR) during channel tracking, such that near-optimum data rates can be obtained with low-overhead. In our numerical results, we analyze the performance of our proposed algorithms for different system parameters. Simulation results show that our proposed channel tracking algorithms are able to achieve near-optimum data rates outperforming state-of-the-art methods.
Rapid thermal chemical vapor deposition of zirconium oxide for metal-oxide-semiconductor field effect transistor application

ZrO2 is investigated in this work to replace SiO2 as the gate dielectric material in metal-oxide-semiconductor devices for its high dielectric constant, good thermal stability on silicon, and large band gap. ZrO2 films were deposited on p-Si(100) wafers by a rapid thermal chemical vapor deposition process using a zirconium (IV) t-butoxide Zr(OC4H9)4 precursor and oxygen. At temperatures between 300 and 400 °C, the reaction was thermally activated with an activation energy of 29 kcal/mol, consistent with a β-hydride elimination mechanism leading to ZrO2 deposition. In this regime at substrate temperatures below 350 °C, one atomic layer of ZrO2 can be deposited after each alternating exposure to the precursor and oxygen, ideal for achieving conformal coverage of ZrO2 over high aspect ratio features. Stoichiometric, uniform, and amorphous ZrO2 was obtained, and highly conformal step coverage of the deposited ZrO2 was observed on 300 nm features with an aspect ratio of 4. The dielectric constant of ZrO2 achie.
Persistence of the herbicide butachlor in soil after repeated applications and its effects on soil microbial functional diversity

Effects of repeated applications of the herbicide butachlor (N-(butoxymethyl)-2-chloro -N-2′,6′-dimethyl acetanilide) in soil on its persistence and soil microbial functional diversity were investigated under laboratory conditions. The degradation half-lives of butachlor at the recommended dosage in soil were calculated to be 12.5, 4.5, and 3.2 days for the first, second, and third applications, respectively. Throughout this study, no significant inhibition of the Shannon-Wiener index H′ was observed. However, the Simpson index 1/D and McIntosh index U were significantly reduced (P ≤ 0.05) during the initial 3 days after the first application of butachlor, and thereafter gradually recovered to a similar level to that of the control soil. A similar variation but faster recovery in 1/D and U was observed after the second and third Butachlor applications. Therefore, repeated applications of butachlor led to more rapid degradation of the herbicide, and more rapid recovery of soil microorganisms. It is concluded that repeated butachlor applications in soil had a temporary or short-term inhibitory effect on soil microbial communities.
Cylindrical Hardy inequalities on half-spaces

We study some versions of the cylindrical Hardy identities and inequalities in the style of Badiale-Tarantello [2]. We show that the best constants of the cylindrical Hardy inequalities can be improved when we consider functions on half-spaces. For more information see https://ejde.math.txstate.edu/Volumes/2020/75/abstr.html
Standardized Patients in Communication Sciences and DIsorders: Past, Present and Future Directions

Standardized patients (SPs) are increasingly being used with students in the field of communication sciences and disorders (CSD). The purpose of this paper is to describe the use of SPs with CSD students. Challenges to the clinical education of students are described, and a call is made to expand the use of SPs to facilitate student learning of clinical skills and to assess students’ clinical competency.
Effects of Watershed Land Use and Lake Morphometry on the Trophic State of Chinese Lakes: Implications for Eutrophication Control

Water quality in lakes is influenced by a large number of watershed and lake characteristics. In this study, we examined the relative effects of watershed land use and lake morphology on the trophic state of 19 lakes in the Yunnan plateau and lower Yangtze floodplain, the two most eutrophic regions in China. Trophic state parameters consisted of total nitrogen, total phosphorus, chemical oxygen demand, chlorophyll-a, Secchi depth, and trophic state index, while lake morphometric variables included area, maximum depth, mean depth, water residence time (WRT), volume, and length to width ratio. Percentages of forest, grassland, cropland, unused land, built-up land, and water body in each lake's watershed were extracted from a land use map interpreted from Landsat TM images. A t-test indicated that lower Yangtze floodplain lakes were shallower and had higher percentages of cropland and built-up land in watersheds than Yunnan plateau lakes. Pearson's correlation analysis indicated that both watershed land use and lake morphometric variables were significantly related to most of the trophic state parameters. However, stepwise regression analyses demonstrated that the trophic state of the lower Yangtze floodplain lakes was mainly controlled by the percentages of cropland and built-up land in watersheds, while that of Yunnan plateau lakes was mostly determined by the lake depth and WRT. These results suggest that the relative effects of watershed land use and lake morphology on lake trophic state are dependent on the lake's location. This study can provide some useful information in watershed land use management for controlling eutrophication in Chinese lakes.
Kinetic theory of reactive pair dynamics in liquids

The kinetic theory of chemical reactions in dense fluids is extended to calculate the dynamics of a reactive pair of particles. Given an initial pair distribution, the probability that the pair of particles will remain unreacted is calculated. Explicit solutions are obtained by taking into account repeated ring events and the results are shown to be a generalization of Fick’s law calculations for this problem. Other classes of dynamical events which lead to a coupling of the diffusive motion of the pair are examined in a more formal way and their physical significance is discussed. The applicability of the theory to the analysis of recombination reactions in liquids is discussed.
Partial oxidation of methane over oxide catalysts. Comments on the reaction mechanism

A detailed investigation of the partial oxidation of methane to ethane and ethene is described. In particular a range of oxidants (O2, N2O, O3) have been reacted with a series of catalysts (MgO, Li/MgO, La2O3, Li/La2O3, Sm2O3 and Li/Sm2O3) and these studies have been utilized to investigate the reaction mechanism. Methane oxidation at conversions of ca. 1 % have indicated that ethene as well as ethane is a primary reaction product, but at higher conversions the major fraction of the ethene formed is via oxidative dehydrogenation of ethane in a secondary reaction. Based on this study a reaction mechanism is proposed and discussed. In line with previous studies the results from used of N2O as oxidant confirm that O–(s) is the oxidising species responsible for CH˙3 formation, from CH4, which on dimerisation yields ethane. In addition it is proposed that primary formation of ethene results from the interaction of methane with a different surface oxygen species (e.g. O2–2(s)). The oxides studied, which can be considered as broadly representative of the wide range of oxides utilised as catalysts, become active only at high temperatures ( 700 °C) and at such temperatures the gas phase nature of the overall reaction is dominant. The consequences of this observation are discussed with respect to the design of improved catalysts.
Guiding students to success: A systematic review of research on guided notes as an instructional strategy from 2009-2019

Guided notes were introduced decades ago, but there is still debate over their efficacy in improving student outcomes. The purpose of this study is to examine peer-reviewed research on guided notes for adult learners in general populations since 2009, understanding the effects of guided notes on student learning, the knowledge and content areas supported by guided notes, and the impact of modality. Results of the 22 included studies indicate that students perceive guided notes in a positive light, and guided notes improve results in certain knowledge domains especially with complex content. However, modality does not influence the efficacy of guided notes. Implications for practice in teaching and learning and recommendations for research were provided.
Location, Location, Location: Manufacturing and House Price Growth

Exploiting data on tens of millions of housing transactions, we show that (1) house prices grew by less in manufacturing-heavy US regions, (2) that this pattern is especially present for the lowest-value homes, and (3) that price declines coincided with worse labor market outcomes, consistent with an income channel. Counterfactual accounting exercises reveal that regional differences in the growth of these lowest-value homes are an important driver of the changes in overall house price inequality. Hence, the economic decline in manufacturing-heavy areas extends far beyond income and employment flows to house prices.
Comparative study of homogeneous solvents for the esterification crosslinking of cellulose with 1,2,3,4-butanetetracarboxylic dianhydride and water absorbency of the reaction products

Superabsorbent hydrogels were prepared via esterification crosslinking of cellulose with 1,2,3,4-butanetetracarboxylic dianhydride (BTCA) in three solvent systems: lithium chloride (LiCl)/N-methyl-2-pyrrolidinone (NMP), LiCl/N,N-dimethylacetamide (DMAc), and tetrabutylammonium fluoride/dimethyl sulfoxide (TBAF/DMSO). The absorbency of the hydrogels was strongly dependent on the BTCA feed to cellulose ratio as well as the nature of the solvent system used. The rate of cellulose esterification was enhanced in TBAF/DMSO relative to the other systems, and the highest water absorbency of the hydrogels (987 g g−1 polymer) was also achieved using this system. The hydrogels obtained in the TBAF/DMSO system had a similar degree of both crosslinking and grafting, indicating that both reactions were promoted to the same extent in this solvent, whereas crosslinking was preferentially enhanced over grafting in the LiCl/NMP and LiCl/DMAc systems. The difference in the composition of the hydrogels was attributed to the difference in the electronegativity of the fluoride and chloride anions in these solvents. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013