bluuebunny/crossref_metadata_2025 huggingface dataset:
Body Weight at Birth: The Only Risk Factor Associated with Contralateral Clavicular Fracture in Patients with Congenital Muscular Torticollis
Authors: Lee Zeeihn , Cho Joo Young , Lee Byung Joo , Kim Jong Min , Park Donghwi
Published: September 2019

To date and to the best of our knowledge, there have been limited studies on the risk factor of clavicle fracture combined with congenital muscular torticollis (CMT), despite it being the most common fracture in newborns. So, the aim of this study was to investigate the risk factors associated with clavicular fracture combined with CMT, and its effect on prognosis. In this study, a total of 134 infants with CMT were included. The risk factors associated with clavicular fracture combined with CMT were analyzed. To analyze the correlation between the clinical parameters and the clavicular fracture in patients with CMT, demographic data, such as body weight at birth, maternal age, gender, gestational age, delivery method, sternocleidomastoid (SCM) thickness of ipsilateral side, its ratio between the ipsilateral and contralateral side, and the first visitation date after birth were evaluated. In the results of this study, the clavicular fracture was found in 15 of 134 patients with CMT (19%). In multivariate logistic analysis, the body weight at birth was the only significant parameter for predicting clavicular fracture in patients with CMT (p-value < 0.05). However, there was no significant difference of treatment duration between CMT infants with or without clavicular fracture. In infants with CMT, the area under the ROC curve of the body weight at birth for predicting clavicular fracture was 0.659 (95% CI, 0.564–0.745.; p < 0.05). The optimal cut-off value obtained from the maximum Youden index J was 3470 g (sensitivity: 57.14%, specificity: 75.76%), and the odd ratio of clavicular fracture in patients with CMT increased by 1.244 times for every 100 g of body weight at birth. In conclusion, birth weight appears to be a clinical predictor of clavicular fracture in infants with CMT. More studies and discussions are needed on whether any screening should be recommended for detecting the concurrent clavicular fracture in subjects with CMT.
Tuning the matrix metalloproteinase-1 degradability of peptide amphiphile nanofibers through supramolecular engineering
Authors: Shi Yejiao , Ferreira Daniela S. , Banerjee Jayati , Pickford Andrew R. , Azevedo Helena S.
Published: September 2019

Rationally designed peptide amphiphiles containing MMP-1 cleavable substrate self-assemble into nanofibers with different structural hydrogen bonding that regulates their MMP-1 degradability.
A new strategy to hydrothermally synthesize olivine phosphates
Authors: Li Lingmeng , Lu Xiaopeng , Chen Wei , Fang Haisheng
Published: September 2019

A new strategy based on the P-excess reaction system is innovated to hydrothermally synthesize olivine phosphates (LiMPO4).
Electrochemically triggered upconverted luminescence for light-emitting devices
Authors: Minami Haruki , Ichikawa Takuya , Nakamura Kazuki , Kobayashi Norihisa
Published: September 2019

Electrochemically triggered upconverted luminescence through triplet–triplet energy transfer (TTET) and subsequent triplet–triplet annihilation upconversion (TTA-UC) is observed for the first time.
Dual gold catalysis – an update
Authors: Zhao Ximei , Rudolph Matthias , Hashmi A. Stephen K.
Published: September 2019

This feature article focuses on the highly exciting new developments in the field of dual gold activation chemistry reported from 2014 to 2019.
Fluorescent molecular spring that visualizes the extension and contraction motions of a double-stranded helicate bearing terminal pyrene units triggered by release and binding of alkali metal ions
Authors: Taura Daisuke , Shimizu Kaori , Yokota Chiaki , Ikeda Riho , Suzuki Yoshimasa , Iida Hiroki , Ousaka Naoki , Yashima Eiji
Published: September 2019

A unique springlike motion of a fluorescent pyrene-terminated double-stranded helicate is visualized by the catch and release of alkali metal ions.
Rh(iii)-catalyzed alkynylation: synthesis of functionalized quinolines from aminohydrazones
Authors: Kumar Pradeep , Garg Vineeta , Kumar Manoj , Verma Akhilesh K.
Published: September 2019

Rhodium-catalyzed, chemo- and regioselective synthesis of functionalized quinolines using 2-aminohydrazones and terminal alkynes has been described.
Self-sorting in dynamic disulfide assembly: new biphenyl-bridged “nanohoops” and unsymmetrical cyclophanes
Authors: Phan Ngoc-Minh , Choy Emma P. K. L. , Zakharov Lev N. , Johnson Darren W.
Published: September 2019

From at least 21 possible macrocycles, self-sorting and DCC strategies provide a high-yield route to two new unsymmetrical, trimeric nanohoops.
Optical deformation potential and self-trapped excitons in 2D hybrid perovskites
Authors: Yu Zhi-Gang
Published: September 2019

Optical deformation potential induces self-trapped excitons in 2D perovskites.
Heteroleptic ruthenium bis-terpyridine complexes bearing a 4-(dimethylamino)phenyl donor and free coordination sites for hydrogen photo-evolution
Authors: Auvray Thomas , Sahoo Rakesh , Deschênes Denis , Hanan Garry S.
Published: September 2019

Three new ruthenium bis-terpyridine complexes bearing both an internal electron donor and peripheral coordination site(s) are used as photosensitisers in H2 photo-evolution under blue and green light with sustained activity for at least two days.
Coumarin alleviates ovalbumin-induced food anaphylaxis in a mouse model by affecting mast cell function
Authors: Liu Qing-Mei , Zhang Ya-Fen , Gao Yuan-Yuan , Liu Hong , Cao Min-Jie , Yang Xian-Wen , Su Wen-Jin , Liu Guang-Ming
Published: September 2019

Coumarin could inhibit OVA-induced food allergic response by suppressing the expression of c-KIT and improving the apoptosis of IgE-activated BMMCs.
Lycopene alleviates H2O2-induced oxidative stress, inflammation and apoptosis in bovine mammary epithelial cellsviathe NFE2L2 signaling pathway
Authors: Sun Xudong , Jia Hongdou , Xu Qiushi , Zhao Chenxu , Xu Chuang
Published: September 2019

LYC against H2O2-induced oxidative damage in bMEC at least partly depended on activation of the NFE2L2 signaling pathway.
Photoinduced cycloaddition of biomass derivatives to obtain high-performance spiro-fuel
Authors: Xie Junjian , Pan Lun , Nie Genkuo , Xie Jiawei , Liu Yakun , Ma Chi , Zhang Xiangwen , Zou Ji-Jun
Published: September 2019

A self-sensitized [2 + 2] cycloaddition process is developed to convert biomass-derived β-pinene and isophorone to high-performance spiro-fuel, which possesses high density and excellent cryogenic properties.
Microfluidic impedance cytometry device with N-shaped electrodes for lateral position measurement of single cells/particles
Authors: Yang Dahou , Ai Ye
Published: September 2019

In this paper, we present an N-shaped electrode-based microfluidic impedance cytometry for the measurement of the lateral position of single cells and particles in continuous flows.
A focused structure–activity relationship study of psoralen-based immunoproteasome inhibitors
Authors: Schiffrer Eva Shannon , Sosič Izidor , Šterman Andrej , Mravljak Janez , Raščan Irena Mlinarič , Gobec Stanislav , Gobec Martina
Published: September 2019

SAR exploration at a single position of the psoralen ring led to improved selectivity to the chymotrypsin-like (β5i) subunit of the immunoproteasome.
Cyclosiloxane polymer bearing dynamic boronic acid: synthesis and bottom-up nanocoating
Authors: Kim Soyeon , Zhu Huie , Demirci Ali , Yamamoto Shunsuke , Miyashita Tokuji , Mitsuishi Masaya
Published: September 2019

Boronic acid-containing polycyclosiloxane showed unique self-assembly nanofilm formation (6 nm film thickness) on various substrates and provided film-based metal ion sensor capability through dynamic covalent bonding.
Effect of a conjugated/elastic block sequence on the morphology and electronic properties of polythiophene based stretchable block copolymers
Authors: Chiang Yun-Chi , Kobayashi Saburo , Isono Takuya , Shih Chien-Chung , Shingu Tomoki , Hung Chih-Chien , Hsieh Hui-Ching , Tung Shih-Huang , Satoh Toshifumi , Chen Wen-Chang
Published: September 2019

We report the synthesis, morphology, and electronic properties of intrinsically stretchable AB-type, ABA-type, and BAB-type block copolymers (BCPs) of poly(3-hexylthiophene) (P3HT: A block) and elastic poly(octylene oxide) (POO: B block).
Large exchange bias and enhanced coercivity in strongly-coupled Ni/NiO binary nanoparticles
Authors: He Xuemin , Xu Yingru , Yao Xiujuan , Zhang Chuangwei , Pu Yong , Wang Xingfu , Mao Weiwei , Du Youwei , Zhong Wei
Published: September 2019

Large exchange bias was obtained and the temperature dependence of the exchange bias was analyzed in detail.
Micellization, surface activities and thermodynamics study of pyridinium-based ionic liquid surfactants in aqueous solution
Authors: Fu Dong , Gao Xiaoru , Huang Bo , Wang Jue , Sun Yao , Zhang Weijun , Kan Kan , Zhang Xiaochen , Xie Yang , Sui Xin
Published: September 2019

This paper contains details on the micellization, surface activity properties, thermodynamics and effects of additives of [Cnmpy][Br].
Facile one-pot synthesis of Mg-doped g-C3N4 for photocatalytic reduction of CO2
Authors: Dong Xinyue , Zhang Suicai , Wu Hualin , Kang Zhuo , Wang Li
Published: September 2019

Graphitic carbon nitride (g-C3N4) has attracted wide attention due to its potential in solving energy and environmental issues.
Star-poly(ε-caprolactone) as the stationary phase for capillary gas chromatographic separation
Authors: Sun Tao , Jiang Xingxing , Song Qianqian , Shuai Xiaomin , Chen Yujie , Zhao Xinyu , Cai Zhiqiang , Li Ke , Qiao Xiaoguang , Hu Shaoqiang
Published: September 2019

This work presents the separation performance of star-poly(ε-caprolactone) (star-PCL) as the stationary phase for capillary gas chromatography (GC).
Nanoparticles in an antibiotic-loaded nanomesh for drug delivery
Authors: Fuller Melanie A. , Carey Ashley , Whiley Harriet , Kurimoto Rio , Ebara Mitsuhiro , Köper Ingo
Published: September 2019

The addition of gold nanoparticles to an antibiotic embedded nanomesh altered the amount of antibiotics released over 14 days.
Tip-enhanced Raman spectroscopy for structural analysis of two-dimensional covalent monolayers synthesized on water and on Au (111)
Authors: Zheng Li-Qing , Servalli Marco , Schlüter A. Dieter , Zenobi Renato
Published: September 2019

Two-dimensional covalent monolayers synthesized at an air/water interface were structurally analyzed by tip-enhanced Raman spectroscopy (TERS). Finally, on-metal surface synthesis of a 2D polymer was demonstrated under ambient conditions.
The effects of mechanical constriction on the operation of sulfide based solid-state batteries
Authors: Fitzhugh William , Ye Luhan , Li Xin
Published: September 2019

This review explores the effects of mechanical constriction on the phase stability of ceramic-sulfide solid-electrolytes.
Polypyrrole-coated cellulose nanofibers: influence of orientation, coverage and electrical stimulation on SH-SY5Y behavior
Authors: Elashnikov R. , Rimpelová S. , Děkanovský L. , Švorčík V. , Lyutakov O.
Published: September 2019

The combined effect of the surface morphology and electrical stimulation of the conducive randomly- and uniaxially-aligned polypyrrole-coated cellulose acetate butyrate nanofibers on SH-SY5Y cell behavior and growth was shown.
Tuning the molecular packing and energy levels of fullerene acceptors for polymer solar cells
Authors: Tian Chengbo , Chen Miaomiao , Tian Hanrui , Nan Ziang , Liang Yuming , Wei Zhanhua
Published: September 2019

Two novel fullerene acceptors were synthesized and applied in polymer solar cells, and the importance of functional groups in tuning the molecular packing and energy levels for the design of fullerene acceptors was demonstrated.
Near-infrared polymer light-emitting diodes based on an inverted device structure
Authors: Xu Jin , Peng Feng , Sun Zhenzhong , Yu Lei , Yang Wei , Cao Yong
Published: September 2019

Micro-cavity effects were applied to acquire near-infrared emission using normal red-emitting materials through an inverted device structure.
Evaluating the Contribution of Executive Functions to Language Tasks in Cognitively Demanding Contexts
Authors: Obermeyer Jessica , Schlesinger Julie , Martin Nadine
Published: September 2019

Purpose

The purpose of this study was to determine the degree to which the executive functions of attention switching and inhibition predicted performance on language subtests from the Temple Assessment of Language and (Verbal) Short-Term Memory in Aphasia (TALSA;
N. Martin, Minkina, Kohen, &Kalinyak-Fliszar, 2018
) across 3 interval conditions (no delay, 5-s delay, and 5-s filled delay), which was designed to add a memory and executive load to language tasks.

Method

This study was a post hoc experimental design. Participants included 27 people with aphasia who were administered 5 subtests from the TALSA (Naming, Word Repetition, Nonword Repetition, Category Judgment, and Rhyming Judgment), which were selected to evaluate input and output levels of processing in the 3 interval conditions listed above. Three executive tasks were administered to evaluate inhibition (Simon and Flanker tasks) and attention switching (number–letter shifting).

Results

Independent variables were proportion correct on each TALSA task in 3 separate time conditions, and predictor variables were efficiency on the Simon task and number–letter shifting task. Linear regression modeling was completed, which revealed that inhibition was a significant predictor of proportion correct for Word Repetition and Category Judgment in the 5-s filled interval condition.

Conclusions

Our findings indicate that inhibition plays a role in completing tasks that require lexical and/or semantic processing in cognitively demanding conditions. Attention switching was not a significant predictor for any task. These results are an important step toward creating methods to evaluate executive skills in the context of language production.

Supplemental Material

https://doi.org/10.23641/asha.9765107
Voice Function in Gender-Diverse People Assigned Female at Birth: Results From a Participant-Centered Mixed-Methods Study and Implications for Clinical Practice
Authors: Azul David , Neuschaefer-Rube Christiane
Published: September 2019

Purpose

The purpose of this study was to investigate whether there were indications of restrictions to voice function in our group of gender-diverse people assigned female at birth (GD people
AFAB
) and whether the participants would benefit from professional voice support.

Method

We conducted a descriptive, cross-sectional, mixed-methods study combining qualitative content analyses of semistructured interviews, phoniatric examinations, and acoustical voice analyses. Fourteen German-speaking GD people
AFAB
participated. The data were examined for indications of restrictions to voice function according to the results of participant self-evaluation, auditory-perceptual analyses, laryngostroboscopic examinations, and acoustical measurements.

Results

All participants presented with indications of restrictions to voice function, with vocal power, voice quality, singing voice, laryngeal function, pitch range/variability, and vocal control having found to be most frequently affected (in over 60% of participants). Sixty-four percent of participants expressed an interest in professional voice support, with clinicians and researchers recommending professional voice support for 67% and 71%, respectively.

Conclusions

GD people
AFAB
may experience restrictions to a range of domains of voice function and request or be recommended to participate in professional voice support. Research into this area needs to be intensified so that a more in-depth understanding of the potential voice problems GD people
AFAB
might experience can be produced and members of this group can be provided with more comprehensive, evidence-based, and high-quality professional support if and when they need it.
IC 4665 DANCe
Authors: Miret-Roig N. , Bouy H. , Olivares J. , Sarro L. M. , Tamura M. , Allen L. , Bertin E. , Serre S. , Berihuete A. , Beletsky Y. , Barrado D. , Huélamo N. , Cuillandre J.-C. , Moraux E. , Bouvier J.
Published: September 2019

Context.The study of star formation is extremely challenging, due to the lack of complete and clean samples of young nearby clusters and star-forming regions. The recentGaiaDR2 catalogue complemented with the deep ground-based COSMIC DANCe catalogue offers a new database of unprecedented accuracy to revisit the membership of clusters and star-forming regions. The 30 Myr open cluster IC 4665 is one of the few well-known clusters of this age and it is an excellent target where evolutionary models can be tested and planetary formation studied.

Aims.We provide a comprehensive membership analysis of IC 4665 and study the following properties: empirical isochrones, distance, magnitude distribution, present-day system mass function, and spatial distribution.

Methods.We used theGaiaDR2 catalogue together with the DANCe catalogue to look for members via a probabilistic model of the distribution of the observable quantities in both the cluster and background populations.

Results.We obtained a final list of 819 candidate members that cover a 12.4 magnitude range (7 <  J <  19.4). We find that 50% are new candidates, and we estimate a conservative contamination rate of 20%. This unique sample of members allows us to obtain a present-day system mass function in the range of 0.02–6M⊙, which reveals a number of details not seen in previous studies. In addition, we find that a spherically symmetric spatial distribution is favoured by our final list of members for this young open cluster.

Conclusions.Our membership analysis represents a significant increase in the quantity and quality (low contamination) with respect to previous studies. It offers an excellent opportunity to revisit other fundamental parameters such as age.
Height variation of magnetic field and plasma flows in isolated bright points
Authors: Kuckein Christoph
Published: September 2019

Aims. The expansion with height of the solar photospheric magnetic field and the plasma flows is investigated for three isolated bright points (BPs).

Methods. The BPs were observed simultaneously with three different instruments attached to the 1.5 m GREGOR telescope: (1) filtergrams of Ca II H and blue continuum (4505 Å) with the HiFI, (2) imaging spectroscopy of the Na I D2 line at 5890 Å with the GFPI, and (3) slit spectropolarimetry in the 1 μm spectral range with the GRIS. Spectral-line inversions were carried out for the Si I 10827 Å Stokes profiles.

Results. Bright points are identified in the Ca II H and blue continuum filtergrams. Moreover, they are also detected in the blue wing of the Na I D2 and Si I 10827 Å lines, as well as in the Ca I 10839 Å line-core images. We carried out two studies to validate the expansion of the magnetic field with height. On the one hand, we compare the photospheric Stokes V signals of two different spectral lines that are sensitive to different optical depths (Ca I vs. Si I). The area at which the Stokes V signal is significantly large is almost three times larger for the Si I line – sensitive to higher layers – than for the Ca I one. On the other hand, the inferred line-of-sight (LOS) magnetic fields at two optical depths (log τ = −1.0 vs. −2.5) from the Si I line reveal spatially broader fields in the higher layer, up to 51% more extensive in one of the BPs. The dynamics of BPs are tracked along the Na I D2 and Si I lines. The inferred flows from Na I D2 Doppler shifts are rather slow in BPs (≲1 km s−1). However, the Si I line shows intriguing Stokes profiles with important asymmetries. The analysis of these profiles unveils the presence of two components, a fast and a slow one, within the same resolution element. The faster one, with a smaller filling factor of ∼0.3, exhibits LOS velocities of about 6 km s−1. The slower component is slightly blueshifted.

Conclusions. The present work provides observational evidence for the expansion of the magnetic field with height. Moreover, fast flows are likely present in BPs but are sometimes hidden because of observational limitations.
The HST/ACS star formation history of the Tucana dwarf spheroidal galaxy: clues from the horizontal branch
Authors: Savino A. , Tolstoy E. , Salaris M. , Monelli M. , de Boer T. J. L.
Published: September 2019

We report a new star formation history for the Tucana dwarf spheroidal galaxy, obtained from a new look at a deep HST/ACS colour-magnitude diagram. We combined information from the main sequence turn-off and the horizontal branch to resolve the ancient star formation rates on a finer temporal scale than previously possible. We show that Tucana experienced three major phases of star formation, two very close together at ancient times and the last one ending between 6 and 8 Gyr ago. We show that the three discrete clumps of stars on the horizontal branch are linked to the distinct episodes of star formation in Tucana. The spatial distribution of the clumps reveals that each generation of stars presents a higher concentration than the previous one. The simultaneous modelling of the horizontal branch and the main sequence turn-off also allows us to measure the amount of mass lost by red giant branch stars in Tucana with unprecedented precision, confirming dwarf spheroidals to be excellent laboratories to study the advanced evolution of low-mass stars.
Multiple isotope tracers from Permian-Triassic hydrated sulfates: Implications for fluid-mineral interaction
Authors: Bojar Ana-Voica , Hałas Stanislaw , Bojar Hans-Peter , Trembaczowski Andrzej
Published: September 2019

Isotopic compositions of water of crystallization and sulfate anionic group in gypsum and polyhalite were used as tracers for events related to their formation and subsequent evolution, as for example origin of crystallization water and extent of thermal overprint. For this purpose, gypsum and polyhalite from the Permo-Triassic evaporites of the Eastern Alps, were analysed for isotope composition of sulfate anionic group (δ34S and δ18OSO4) and water of crystallization (δD and δ18O). For comparison, water of crystallisation of polyhalite samples of similar age from New Mexico (USA), Kłodawa (Poland) and Hattberg, Hesse (Germany) were also investigated. Estimated δ18O and δD values of polyhalite formation brines vary from 14.4 to 3.4‰ and 42.5 to −6.1‰, respectively. Gypsum formation brines show different δ18O and δD values, from −5.7 to −15‰ and −30.9 to −88.8‰, respectively. The measured δ18OSO4values of sulfate group are compatible with a thermal overprint at 100°–200°C for both minerals. The thermal overprint documented for the Eastern Alps led to gypsum but not to polyhalite dehydration. The isotopic composition of water of crystallization suggests that polyhalite is preserving the isotopic signature of an enriched brine. During a subsequent event, anhydrite rehydrated to gypsum, with the isotopic composition of water of crystallisation indicating lower (δD and δ18O) values than the present-day meteoric water ones. Due to their distinct mineral structure and, as a result, different temperature of dehydratation, gypsum and polyhalite record different histories following precipitation in an evaporative system.
Renewable energy sources for gas preheating
Authors: Englart Sebastian , Jedlikowski Andrzej , Cepiński Wojciech , Badura Marek
Published: September 2019

To ensure proper gas supply parameters, to the polish natural gas distribution network, which includes about 900 pressure reduction stations (PRS), requires high energy consumption for gas heating, that amounts to approx. 700 TJ/year. This value can be significantly reduced by using renewable energy sources (e.g. ground heat exchangers, heat pumps) in polish gas preheating PRS. This paper presents the analysis of some applications for gas preheating by using gas absorption heat pump and combination of heat pump and ground heat exchanger. The results confirm a noticeable heat energy savings at the PRS by 44%.
Analysis and simulation of the circulation pump operation
Authors: Fijewski Michał , Polarczyk Iwona , Paduchowska Joanna
Published: September 2019

The operation of the circulation installation has a significant impact on the energy efficiency of the building and it contributes to its reduction. The article refers to the actual measurement data obtained from the measurements of the domestic hot water (DHW) preparation system in a multi-family residential building in Wroclaw. On their basis, various possibilities of controlling the operation of the circulation installation without reducing the comfort of DHW operation system were presented and simulated. The results are illustrated in the form of measurable savings in energy consumption and related costs.
Radiant waste heat recovery from steelmaking and glass industry
Authors: Iturralde Jon , Gómez de Arteche Mercedes , Aguirre Patricio , Bárcena Jorge , López Susana , Ubieta Eduardo , Fernandez Arroiabe Peru , Bou-Ali M. Mounir , Unamuno Iñigo
Published: September 2019

This paper tackles the problem of industrial waste heat recovery through an unexploited heat transfer mechanism: thermal radiation. Energy intensive industries have a considerable potential of unused radiant heat, which cannot be recovered through existing methods. That potential energy is quantified for the main identified industries: steel and glassmaking. Then, a radiant heat capturing device allowing high temperature heat capture is designed according to process requirements. Finally, recoverable heat is estimated and potential uses are proposed.
Seasonal coefficient of performance of air-to-air heat pump and energy performance of a building in Poland
Authors: Kowalski Piotr , Szałański Paweł
Published: September 2019

The article discusses the problem of determining for air heat pumps the seasonal efficiency of energy production necessary to determine the energy performance of a building. On the example of selected Polish cities (Suwalki, Bialystok, Warsaw, Wroclaw, Zielona Gora, Resko, Szczecinek, Koszalin) the influence of climatic conditions on the SCOP of an exemplary air-to-air heat pump and on the result of building energy performance calculations was analysed. SCOPs for each location were determined according to the method of EN 14825. The difference between SCOP for average (A) and colder (C) climates according to EN 14825 was 35.6%. It has been shown that the climate of Polish cities may be similar to both the average climate (A) and the colder climate (C), or they significantly differ from both climates. The most significant difference in SCOP between the analysed cities was obtained for Suwalki and Szczecinek. It was 31.9% and 31.4% for the assumed heating season length as for climate (A) and (C) respectively. For the exemplary building in Suwalki, taking SCOP for the average climate (A) and not based on climatic data of Suwalki gives an error of 39.3% in the calculation of primary energy for heating. For the same locations, the differences in SCOP and EP resulting from the assumption of the heating season length as for the average climate (A) or as for the colder climate (C) were respectively from 2.4% to 3.3% and from -3.4% to -2.2%. In diversified Polish climate, assuming the same SCOP values of air heat pumps regardless of location does not allow for their full comparison with devices whose efficiency does not depend on climatic conditions. The authors suggest that when calculating the energy performance of the building, the SCOP should be always determined on the basis of the local climate and the length of the heating season.
Numerical investigation on the performance of a small counter-rotating wind turbine
Authors: Pacholczyk Michał , Blecharz Krzysztof , Karkosiński Dariusz
Published: September 2019

The article presents results of the investigation on the performance of a small counter-rotating wind turbine. Wind turbine has been simulated using Computational Fluid Dynamics methods. Actuator Line Model has been successfully used to represent rotors in computational domain. Parametric study has been carried out, taking into account changes in the tip speed ratio of the rotors while maintaining a constant distance between upwind and downwind rotor. Study results revealed noticeable increase in power coefficient for optimal configuration. Dynamic interaction between rotors has been investigated exposing no significant interference in both torque and power.
Utilization and recycling of municipal solid waste in a subarctic zone
Authors: Savenkova Elena V. , Sayegh Marderos Ara , Bystryakov Alexandr Y. , Blokhina Tatiana K. , Karpenko Oksana A.
Published: September 2019

Municipal solid waste (MSW) collection and disposal is one of the major problems of urban environment in most countries worldwide today. The problem of utilization of solid waste in the Northern Europe on the Kola Peninsula was raised in this article, where the ground arrangement in a subarctic zone is very special and the weather conditions are severe. The paper main goal is to verify long-term impact of the Mezhdurechie municipal landfill on the atmosphere in Kola Peninsula. The paper also aims to establish the holding actions for recycling and utilization of worn-out tires for mentioned municipal landfill. The ground concentrations of pollutants from the operational sources were presented. The proposed recycling development in this paper has a positive impact on the ecoindustry and ensures environmental safety and municipal economy.
The influence of thermal load profile of building on the air/water heat pump efficiency simulation
Authors: Szulgowska-Zgrzywa Małgorzata , Piechurski Krzysztof
Published: September 2019

In this paper the authors analysed the impact of the calculation method of the partial load conditions and the accuracy of the energy demand profile on the simulation results of the air/water heat pump operation supplying the heating system. All the analyses results were compared to the results acquired for the real installation of the air/water heat pump located in Poland. The authors assessed the inaccuracy of the unit’s efficiency estimation resulting from the simplified thermal load profile of the air/water heat pump. It has been showed that using the monthly energy demand as the input data gives satisfactory results. Inaccuracy of the monthly simulation results in relation to simulations carried out on the actual hourly energy demand by no more than 7% is acceptable. On average, this deterioration did not exceed 3%.
Biogas production in the methane fermentation of excess sludge oxidized with Fenton’s reagent
Authors: Zawieja Iwona , Brzeska Kinga
Published: September 2019

The advanced oxidation processes (AOPs) play an important role in the degradation of hardly decomposable organic pollutants. AOPs methods rely on the production of highly reactive hydroxyl OH• radicals. The aim of the conducted research was to intensify biogas production in the methane fermentation process of excess sludge subjected to the process of deep oxidation with Fenton's reagent. In the process of oxidation of sewage sludge with the Fenton reagent, doses of iron ions in the range 0.02–0.14 g Fe2+/g TS (total solids) were used Hydrogen peroxide was measured in the proportions 1: 1–1:10 in relation to the mass of iron ions. The basic substrate of the study was excess sludge. In the case of excess sludge oxidation with the use of Fenton's reagent, the most favorable process conditions were considered to be the dose of iron ions 0.08 g Fe2+/g d.m. and a Fe2+: H2O2 ratio of 1:5. As a result of subjecting the excess sludge to disintegration with the Fenton reagent in the above-mentioned dose, with respect to the fermentation process of unprocessed sludge, about two-fold increase in the digestion degree of excess sludge and about 35% increase of the biogas yield was obtained.
Reconstruction of air-shower measurements with AERA in the presence of pulsed radio-frequency interference
Authors: Huege Tim , Welling Christoph B.
Published: September 2019

Auger Engineering Radio Array (AERA) is situated in the Argentinian Pampa Amarilla, a location far away from large human settlements. Nevertheless, a strong background of pulsed radio-frequency interference (RFI) exists on site, which not only makes radio self-triggering challenging but also poses a problem for an effcient and pure reconstruction of air-shower measurements. We present how our standard event reconstruction exploi s several strategies to identify and suppress pulsed noise, and quantify the effciency and purity of our algorithms. These strategies can be employed by any experiment taking radio data in the presence of pulsed RFI.
Experimental and Numerical Testing of Possibilities and Limits for Applications of Phase Changed Materials in Buildings
Authors: Charvátová Hana , Zálešák Martin , Kolácˇek Martin , Sehnálek Stanislav
Published: September 2019

The paper is aimed atto a study of a possibility to use PCM (Phase Change Materials) to increase the thermal storage properties of buildings. For this purpose, both the experimental testing and computer modelling were performed. The PCM DuPont Energain panel was used for the study of its thermal technical parameters under laboratory conditions. Laboratory testing of the effect of PCM surface treatment showed a double increase in the heat transfer coefficient, but also a decrease of 17 % in the time constant under given conditions. The computer modelling was used for the study of the influence of walls sheathing on the temperature comfort inside the tested room of the wooden house by its passive cooling in summer. Results of the numerical simulations proved influence of the PCM covering. But in the presented model, the PCM covering caused only a slight improvement in the thermal comfort inside the room.
Design and development of a process-economic mathematical model of a lupine hydrolysis unit
Authors: Pecha Jiří , Šánek Lubomír , Jelínek Miloš , Husár Jakub , Kolomazník Karel
Published: September 2019

Lupine is considered as a source of protein with a high level of valuable amino acids, what can have in a human diet significant impact on the prevention of various diseases. This paper deals with the process modelling and computer simulation of the lupine flour hydrolysis, particularly focusing on calculations and comparisons of different process variants. Suggested process-economic mathematical model of the production process is a very effective tool for achieving optimal operating conditions under which the specific costs of preparing the final hydrolyzed product are minimal. Simultaneously, the proposed mathematical model of the production node of the hydrolysis unit includes the key processes for the preparation of the resulting hydrolyzate, i.e. the chemical reaction itself, filtration of the reaction mixture and concentration of the filtrate, which is the final desired product – the lupine hydrolysate.
Use of Virtual Reality for the Therapy of Children with Attention Deficit Hyperactivity Disorder
Authors: Musalek Miroslav , Kovar Ivan , Sysala Tomas
Published: September 2019

The subject of this article is to find out if there is any possibility that virtual reality (VR) can help to heal the people with attention deficit hyperactivity disorder (ADHD). The aim of the suggested and realized pre-research was to find out if it is possible to help children to deal with ADHD. We organized a pre-research with the use of Samsung Gear VR device on a small sample of examined respondents with ADHD. Initial results are obtained from questionnaire method of a specialized test SNAP-IV. Table shows improvement of mental state of respondents in case of use new modern VR methods. Treatment of ADHD is often difficult, take a lot of time and it is performed mostly with pharmaceuticals or hypnotic sleep medications. This pre-research presents a method that could speed up therapy and also reduce the use of pills which is very important. Discussion and evaluation of the pre-research are included.
On the Mechanism of the Stevens Rearrangement
Authors: Baidilov Daler
Published: September 2019

The reaction mechanism for the Stevens rearrangement is one of the most controversial reaction mechanisms in organic chemistry. This account will address that controversy reviewing the experimental as well as some computational results.

1 Introduction

2 Evolution of the Mechanistic Knowledge

2.1 Stevens (1928)

2.2 Stevens (1930)

2.3 Stevens (1932)

2.4 Campbell (1946)

2.5 Hauser (1951)

2.6 Kline (1952)

2.7 Lepley (1969)

2.8 Baldwin (1970)

3 Computational Investigations

4 [2,3]-Stevens Rearrangement?

5 Conclusion
Nitroacenaphthene as a New Photocatalyst for the Synthesis of Sulfonyl Amidines
Authors: Jian Yong , Chen Ming , Yang Chao , Xia Wujiong
Published: September 2019

A small molecule, namely nitroacenaphthene, is reported for the first time as a recyclable visible-light photocatalyst for the construction of the C=N bond from sulfonyl azides and amines. This scalable, site-selective protocol provides a convenient way to access various sulfonyl amidines under mild conditions. Two reaction pathways are proposed, according to different transformation patterns.
Experimental analysis of the particle transport in the magnetized plasma column with an application to the helicon discharge
Authors: Shesterikov I. , Crombe K. , Noterdaeme J.-M.
Published: September 2019

Different transport mechanisms in a magnetized radio frequency plasma discharge in the IShTAR device are compared. The total cross field particle transport systematically shows the best agreement with the turbulent diffusion. Also, the ion mobility dominated transport could substantially contribute to radial losses. The relative role of parallel and perpendicular losses in the overall particle confinement is also compared. The total perpendicular particle losses are comparable or even larger than the parallel ones, imposing a practical limitation on achieving high density plasma simply combining several helicon antennae sequentially arranged along the glass tube. For the same reason, reducing the diameter of a source tube, in an attempt to achieve a higher plasma density, could be not very efficient when perpendicular particle loss is dominant.
Wave attenuation in glasses: Rayleigh and generalized-Rayleigh scattering scaling
Authors: Moriel Avraham , Kapteijns Geert , Rainone Corrado , Zylberg Jacques , Lerner Edan , Bouchbinder Eran
Published: September 2019

The attenuation of long-wavelength phonons (waves) by glassy disorder plays a central role in various glass anomalies, yet it is neither fully characterized nor fully understood. Of particular importance is the scaling of the attenuation rate Γ(k) with small wavenumbers k → 0 in the thermodynamic limit of macroscopic glasses. Here, we use a combination of theory and extensive computer simulations to show that the macroscopic low-frequency behavior emerges at intermediate frequencies in finite-size glasses, above a recently identified crossover wavenumber k†, where phonons are no longer quantized into bands. For k < k†, finite-size effects dominate Γ(k), which is quantitatively described by a theory of disordered phonon bands. For k > k†, we find that Γ(k) is affected by the number of quasilocalized nonphononic excitations, a generic signature of glasses that feature a universal density of states. In particular, we show that in a frequency range in which this number is small, Γ(k) follows a Rayleigh scattering scaling ∼k¯d+1 (¯d is the spatial dimension) and that in a frequency range in which this number is sufficiently large, the recently observed generalized-Rayleigh scaling of the form ∼k¯d+1 log(k0/k) emerges (k0 > k† is a characteristic wavenumber). Our results suggest that macroscopic glasses—and, in particular, glasses generated by conventional laboratory quenches that are known to strongly suppress quasilocalized nonphononic excitations—exhibit Rayleigh scaling at the lowest wavenumbers k and a crossover to generalized-Rayleigh scaling at higher k. Some supporting experimental evidence from recent literature is presented.
Infrared vibrational spectra of CH3+ and its deuterated isotopologues
Authors: Nyman Gunnar , Yu Hua-Gen
Published: September 2019

We report a theoretical study of the infrared (IR) vibrational spectra of CH3+ and its deuterated isotopologues. We also report exothermicities for reactions of these species with HD and D2. The calculations are performed using the two-layer Lanzcos algorithm with an exact full-dimensional molecular Hamiltonian, based on a slightly adjusted potential energy surface of Yu and Sears [H.-G. Yu and T. J. Sears, J. Chem. Phys. 117, 666 (2002)]. The transition strengths are evaluated within the traditional dipole approach. The full-dimensional dipole moment surfaces are calculated at CCSD(T)/cc-pVTZ level and fitted by integrity basis functions using a bond vector method. The results should be helpful for understanding the roles of CH3+ in the interstellar medium, especially in the coma of comet Halley.
Recent developments in Earth-abundant copper-sulfide thermoelectric materials
Authors: Powell Anthony V.
Published: September 2019

The ability of thermoelectric devices to convert waste heat into useful electrical power has stimulated a remarkable growth in research into thermoelectric materials. There is, however, a growing recognition that limited reserves of tellurium, together with the reduction in performance that occurs at elevated temperatures, places constraints on the widespread implementation of thermoelectric technology based on the current generation of telluride-based devices. Metal sulfides have attracted considerable attention as potential tellurium-free alternatives. This perspective provides an overview of the key characteristics of sulfide thermoelectrics and the advantages they offer in the development of devices for energy recovery in the temperature range 373 ≤ T/K ≤ 773. The structures and properties of a group of synthetic materials, related to the minerals chalcocite (Cu2S), stannite (Cu2FeSnS4)/kesterite (Cu2SnS4), chalcopyrite (CuFeS2), bornite (Cu5FeS4), colusite [Cu26V2(As,Sn,Sb)6S32], and tetrahedrite [(Cu,Fe)12Sb4S13], are discussed. In addition to all being composed of Earth-abundant elements, these sulfides share a common tetrahedral CuS4 structural building block. The use of chemical substitution to manipulate electrical and thermal transport properties is described, and common features are identified. This includes the presence of low-energy vibrational modes, the onset of copper-ion mobility, and the emergence of a liquid-like sublattice, which serve to reduce thermal conductivity. Issues associated with materials' stability during synthesis, consolidation, and device operation due to sulfur volatilization and migration of mobile copper ions are also highlighted. Future prospects for sulfide thermoelectrics are discussed in the light of the performance of materials investigated to date.
Direct printing of metal contacts on 4H-SiC for radiation detection
Authors: Taylor Neil R. , Kuang W. , Saeidijavash M. , Kandlakunta Praneeth , Zhang Y. , Cao Lei R.
Published: September 2019

Additive manufacturing (AM) has created the possibility of replacing traditional manufacturing techniques with faster, versatile, and cost-effective production options. In this study, we employed AM techniques to fabricate silicon carbide (SiC) radiation detectors based on commercial 4H-SiC wafers. Platinum (Pt) nanoparticle inks were synthesized and printed onto the surface of a 4H-SiC wafer using an aerosol jet printing technique to create Schottky diodes for radiation detection. The additive printed detectors were characterized for surface morphology through a scanning electron microscope (SEM) and atomic force microscope (AFM), and electronically by current-voltage (IV), capacitance-voltage (CV), and finally by alpha spectroscopy measurements. The printed detector achieved an energy resolution of 3.24% FWHM at 5.486 MeV, compared to 0.62% FWHM of a SiC detector fabricated by conventional cleanroom technologies and 0.3% FWHM of a commercially available Si detector.
Inducing strong magnetism in Cr20Mn20Fe20Co20Ni20 high-entropy alloys by exploiting its anti-Invar property
Authors: Acet M.
Published: September 2019

The equiatomic high-entropy alloy Cr20Mn20Fe20Co20Ni20 high-entropy alloy has a valence-electron-concentration of 8 electrons/atom which is equivalent to that of Fe. The alloy being FCC is therefore electronically equivalent to FCC-Fe. We show through the thermal expansion properties that the alloy carries similar anti-Invar properties as FCC-Fe, but unlike FCC-Fe it is stable throughout its solid-state temperature-range. Therefore, by exploiting the anti-Invar property and expanding the lattice of the alloy by introducing interstitial carbon, we make Cr20Mn20Fe20Co20Ni20 ferromagnetic with a Curie temperature lying above room temperature.
Wet non-thermal integration of nano binary silicon-gold system with strong plasmonic and luminescent characteristics
Authors: Enders Brian , Kocyigit Adem , Bahceci Ersin , Elhalawany Noha , Nayfeh Ammar , Alshammari Owrad , Alsalhi Mohamad , Nayfeh Munir
Published: September 2019

We report on a wet none thermal integration of the binary silicon-gold nano system. Instead of thermally based gas-solid procedures, we use charge exchange/injection-based procedures in a chemical wet environment. SEM and TEM imaging and EDX show 0-D gold-silicon coreshell structures with diameters ranging from 6 to 500 nm in addition to a variety of silicon and gold nano structures. Optical and florescence spectroscopy show that colloids exhibit strong red luminescence and plasmonic resonance in the visible. Mie theory analysis of light scattering is in agreement with the optical observation. The results and procedures are discussed in terms of the relative electron/hole affinity, Schottky potential barrier, strength of the metal-silicon bond, as well as the surface diffusion of metal atoms or clusters on the interface of the constituent materials. Integration of gold and silicon, at the nanoscale in the form core-shell architecture affords the functionalities and attributes of plasmonic light scattering imaging and fluorescence imaging that would be useful for a wide variety of applications, including optical filters, sensing, therapeutics and tracking, and cancer therapy.
Insects: a novel animal-feed protein source for the Australian market
Authors: DiGiacomo K. , Akit H. , Leury B. J.
Published: September 2019

The increasing demands on natural resources to provide food and feed has led to increased global initiatives to improve production sustainability and efficiency. The use of insects as an alternate source of protein for human food and production-animal feed is one such avenue gaining attention. With there being a large variety of insect species endemic to each region, there is likely to be an ideal candidate for each specific production system and region. Insects require less land and water than do terrestrial animals, have high feed-conversion efficiency (FCE) and emit low levels of greenhouse gases (GHG). Insect species currently investigated for mass production include black soldier fly larvae (BSFL), mealworms and crickets. In western societies, it is less likely that wide-scale adoption of insects as a food source will occur, although speciality products with ‘hidden’ insects, such as cricket flour, are commercially available. It is likely to be more achievable for insects to be included into the diets of production and companion animals. While there has been significant investment in research and development of large-scale insect-production systems, such facilities are yet to start producing at a significant scale. The safety and efficacy of insects as a food or feed must be established in conjunction with the development of mass rearing facilities and the optimisation of insect-rearing substrates. Insects also have nutraceutical properties that may have beneficial impacts on animal health and growth, with scope for these properties to be exploited as feed or food additives. The present review will explore the following question: ‘are insects a future livestock industry for Australia?’.