bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic characterization of drug resistance and heterogeneity of the gastric cancer cell BGC823 using single-cell Raman spectroscopy
Authors: Zhang Yong , Jin Ludi , Xu Jingjing , Yu Yuezhou , Shen Lin , Gao Jing , Ye Anpei
Published: November 2017

Drug resistance and heterogeneous characteristics of human gastric carcinoma cells (BGC823) under the treatment of paclitaxel (PTX) were investigated using single-cell Raman spectroscopy (RS).
Gram-scale synthesis of monodisperse sulfonated polystyrene nanospheres for rapid and efficient sequestration of heavy metal ions
Authors: Gong Bin , Peng Yaotian , Pan Ziyan , Chen Weiming , Shen Yi , Xiao Kaijun , Zhang Ling
Published: November 2017

Large-scale monodisperse sulfonated polystyrene nanospheres are synthesized for the removal of lead, copper and zinc ions from aqueous solutions.
Evidence for heterolytic cleavage of a cyclic oxonium ylide: implications for the mechanism of the Stevens [1,2]-shift
Authors: Hosseini Seyedeh Nargess , Johnston Jeffrey R. , West F. G.
Published: November 2017

In contrast to prior evidence for a homolytic mechanism, a cyclopropylcarbinyl-substituted oxonium ylide furnished cleavage products consistent with a zwitterionic intermediate.
Discovery of nicoyamycin A, an inhibitor of uropathogenic Escherichia coli growth in low iron environments
Authors: Mike Laura A. , Tripathi Ashootosh , Blankenship Connor M. , Saluk Alyssa , Schultz Pamela J. , Tamayo-Castillo Giselle , Sherman David H. , Mobley Harry L. T.
Published: November 2017

High-throughput screening and activity-guided purification resulted in the identification of a novel natural product that inhibits uropathogenic Escherichia coli growth.
Hexameric assembly of 5,17-di-substituted calix[4]arene in the solid state
Authors: Yamasaki Yutaro , Sekiya Ryo , Haino Takeharu
Published: November 2017

Chiral 5,17-difunctionalized-25,26,27,28-tetrapropyloxycalix[4]arene possessing (S)-mandelamide arms ((S,S)-1) afforded cocrystals (S,S)-1·(solvent) (solvent = MeOH, EtOH, 1-PrOH, 2-PrOH, and CH3CN). Four of the five cocrystals contain unusual hexameric assembly of the calix[4]arene host.
Optical–magnetic bifunctional properties and mechanistic insights on upconversion of NaYF4:Yb,Ho,Tm@NaGdF4 with a tunable nanodumbbell morphology
Authors: Yu Zhichao , Zhou Haifeng , Zhou Guangjun , Zhou Juan , Wu Yaqiang , Zhang Xingshuang , Wang Tao , Huang Dapeng , Wang Xinqiang , Hu Jifan
Published: November 2017

Optical–magnetic bifunctional upconversion of core–shell particles of NaYF4:Yb,Ho,Tm@NaGdF4 with a nanodumbbell-shaped morphology.
Exploration of cell division times during bacterial cytokinesis
Authors: He Zi , Guo Kunkun
Published: November 2017

The cell division time obtained was about 72 s, and the dependence of the division time on various parameters is discussed in the study.
Photoinduced dynamics in cycloparaphenylenes: planarization, electron–phonon coupling, localization and intra-ring migration of the electronic excitation
Authors: Oldani N. , Doorn S. K. , Tretiak S. , Fernandez-Alberti S.
Published: November 2017

Cycloparaphenylenes represent the smallest possible fragments of armchair carbon nanotubes.
Elucidating electrolyte decomposition under electron-rich environments at the lithium-metal anode
Authors: Camacho-Forero Luis E. , Balbuena Perla B.
Published: November 2017

The lithium metal anode is one of the key components of the lithium–sulfur (Li–S) batteries, which are considered one of the most promising candidates for the next generation of battery systems.
A new scaling for the rotational diffusion of molecular probes in polymer solutions
Authors: Qing Jing , Chen Anpu , Zhao Nanrong
Published: November 2017

In the present work, we propose a new scaling form for the rotational diffusion coefficient of molecular probes in semi-dilute polymer solutions, based on a theoretical study.
Ligands for f-element extraction used in the nuclear fuel cycle
Authors: Leoncini Andrea , Huskens Jurriaan , Verboom Willem
Published: November 2017

This review describes the latest advances regarding the development, modification and application of suitable ligands for the liquid–liquid extraction of actinides and lanthanides from nuclear waste.
Metal–organic frameworks based membranes for liquid separation
Authors: Li Xin , Liu Yuxin , Wang Jing , Gascon Jorge , Li Jiansheng , Van der Bruggen Bart
Published: November 2017

This Tutorial Review highlights the achievements in the rational design and the latest applications of MOF-based membranes in liquid separation.
Nanocrystalline LaOx/NiO composite as high performance electrodes for supercapacitors
Authors: Du Guo , Zeng Zifan , Xiao Bangqing , Wang Dengzhi , Yuan Yuan , Zhu Xiaohong , Zhu Jiliang
Published: November 2017

Nanocrystalline LaOx/NiO composite electrodes were synthesized via two types of facile cathodic electrodeposition methods onto nickel foam followed by thermal annealing without any binders.
Photochemical relaxation pathways of S6-methylthioinosine and O6-methylguanosine in solution
Authors: Ashwood Brennan , Ortiz-Rodríguez Luis A. , Crespo-Hernández Carlos E.
Published: November 2017

The excited-state dynamics of two byproducts resulting from enzymatic reactions of prodrugs in cells and from the interaction of alkylating agents with cellular DNA have been investigated.
Vasorelaxant activity of twenty-one physiologically relevant (poly)phenolic metabolites on isolated mouse arteries
Authors: Van Rymenant E. , Grootaert C. , Beerens K. , Needs P. W. , Kroon P. A. , Kerimi A. , Williamson G. , García-Villalba R. , González-Sarrías A. , Tomas-Barberan F. , Van Camp J. , Van de Voorde J.
Published: November 2017

Polyphenols are beneficial for health, but are metabolised after consumption.
Visible-light-driven conversion of CO2 from air to CO using an ionic liquid and a conjugated polymer
Authors: Chen Yu , Ji Guipeng , Guo Shien , Yu Bo , Zhao Yanfei , Wu Yunyan , Zhang Hongye , Liu Zhenghui , Han Buxing , Liu Zhimin
Published: November 2017

A task-specific ionic liquid in combination with a pyrene-based conjugated polymer realizes the direct capture of CO2 and H2O from air and further conversion to CO under visible-light irradiation.
A new approach to the effects of isocyanide (CN-R) ligands on the luminescence properties of cycloplatinated(ii) complexes
Authors: Shahsavari Hamid R. , Babadi Aghakhanpour Reza , Hossein-Abadi Mojdeh , Golbon Haghighi Mohsen , Notash Behrouz , Fereidoonnezhad Masood
Published: November 2017

Cycloplatinated complexes bearing isocyanides were prepared and characterized. The complexes exhibited strong luminescence while the nature of R substituents in isocyanides affected the luminescence characteristics.
Photocatalytic hydrogen evolution performance of NiS cocatalyst modified LaFeO3/g-C3N4 heterojunctions
Authors: Xu Ke , Xu Hong , Feng Guangwei , Feng Jian
Published: November 2017

NiS cocatalyst modified LaFeO3/g-C3N4 heterostructures were prepared and their enhanced photocatalytic hydrogen evolution performance under visible light irradiation was presented.
A flexible magnesium silicate coated electrospun fiber adsorbent for high-efficiency removal of a toxic cationic herbicide
Authors: Li Y. , Zhao R. , Chao S. , Sun B. , Zhang N. , Qiu J. , Wang C. , Li X.
Published: November 2017

A novel magnesium silicate/PAN composite electrospun fiber adsorbent was prepared and systematically investigated for the removal of the cationic herbicide diquat.
A curcumin derived probe for colorimetric detection of azide ions in water
Authors: Adhikari Susanta , Guria Subhajit , Ghosh Avijit , Pal Abhishek , Das Debasis
Published: November 2017

A curcumin based probe (CUC-P) having an active alkyne moiety has been synthesised for selective detection of azide (N3−) ions in aqueous medium.
CTAB-assisted growth of self-supported Zn2GeO4 nanosheet network on a conductive foam as a binder-free electrode for long-life lithium-ion batteries
Authors: Gao Guoxin , Xiang Yang , Lu Shiyao , Dong Bitao , Chen Sheng , Shi Lei , Wang Yuankun , Wu Hu , Li Zhaoyang , Abdelkader Amr , Xi Kai , Ding Shujiang
Published: November 2017

Ultrathin ZnGe2O4 NSs are fabricated on a nickel foam via a CTAB-assisted hydrothermal process.
Single nanoparticles magnetization curves by controlled tip magnetization magnetic force microscopy
Authors: Angeloni Livia , Passeri Daniele , Corsetti Stella , Peddis Davide , Mantovani Diego , Rossi Marco
Published: November 2017

Controlled magnetization-magnetic force microscopy technique allows the quantitative measurement of the magnetization curve of single magnetic nanoparticles.
Self-assembled monolayer field-effect transistors based on oligo-9,9′-dioctylfluorene phosphonic acids
Authors: Gothe Bastian , de Roo Tjaard , Will Johannes , Unruh Tobias , Mecking Stefan , Halik Marcus
Published: November 2017

A fluorene oligomer is employed in a new type of multiple π-system self-assembled monolayer to optimize charge transport.
MXene: a potential candidate for yarn supercapacitors
Authors: Zhang Jizhen , Seyedin Shayan , Gu Zhoujie , Yang Wenrong , Wang Xungai , Razal Joselito M.
Published: November 2017

By using MXene as active material and PEDOT-PSS as conductive binder, this work achieves yarn supercapacitors with excellent length capacitance.
Comment on “Lewis acidic ionic liquids of crown ether complex cations: preparation and applications in organic reactions” by Y. Liang, J. Wang, C. Cheng and H. Jing, RSC Adv., 2016, 6, 93546
Authors: Swadźba-Kwaśny Małgorzata
Published: November 2017

In the recently published paper by Liang et al., chlorozincate(ii) anion was identified as [ZnCl3]− based on Raman spectroscopy. According to every textbook and numerous papers, this band corresponds to [ZnCl4]2−.
Modulating the electronic and magnetic properties of graphene
Authors: Nigar Salma , Zhou Zhongfu , Wang Hao , Imtiaz Muhammad
Published: November 2017

Graphene, an sp2hybridized single sheet of carbon atoms organized in a honeycomb lattice, is a zero band gap semiconductor or semimetal.
Low-voltage-driven and highly-diffractive holographic polymer dispersed liquid crystals with spherical morphology
Authors: Peng Haiyan , Yu Lei , Chen Guannan , Bohl Trent William , Ye Yunsheng , Zhou Xingping , Xue Zhigang , Roy V. A. L. , Xie Xiaolin
Published: November 2017

Low-voltage driven and highly diffractive HPDLC gratings were formed by dialing the phase separated microphology through simple LC mixing.
Synergic effect of copper-based metal–organic frameworks for highly efficient C–H activation of amidines
Authors: Xu Fen , Kang Wei-Fen , Wang Xiao-Ning , Kou Hao-Dong , Jin Zhen , Liu Chun-Sen
Published: November 2017

A Cu–MOF-catalyzed C–H functionalization of substituted amidines was developed for the facile and efficient synthesis of benzimidazoles.
Simultaneous sensitive detection of multiple DNA glycosylases from lung cancer cells at the single-molecule level
Authors: Hu Juan , Liu Ming-hao , Li Ying , Tang Bo , Zhang Chun-yang
Published: November 2017

We demonstrate the simultaneous detection of human 8-oxoguanine DNA glycosylase 1 and human alkyladenine DNA glycosylase at the single-molecule level.
Silver bismuth iodides in various compositions as potential Pb-free light absorbers for hybrid solar cells
Authors: Jung Ki Woo , Sohn Mi Rae , Lee Hye Min , Yang In Seok , Sung Sang Do , Kim Jeongho , Wei-Guang Diau Eric , Lee Wan In
Published: November 2017

Among the silver bismuth iodides (SBI) in the compositions of Ag : Bi = 2 : 1–1 : 1, SBI-55 : 45 (Ag : Bi = 55 : 45) appears to be the most efficient light absorber providing a PCE of 2.31%.
Microstructural metrology of tobacco mosaic virus nanorods during radial compression and heating
Authors: Riekel C. , Burghammer M. , Snigirev I. , Rosenthal M.
Published: November 2017

We determined stress-induced deformations and the thermal stability of nanorod-shaped tobacco mosaic virus (TMV) capsids in coffee-ring structures by X-ray nanodiffraction.
Shrinking microbubbles with microfluidics: mathematical modelling to control microbubble sizes
Authors: Salari A. , Gnyawali V. , Griffiths I. M. , Karshafian R. , Kolios M. C. , Tsai S. S. H.
Published: November 2017

A mathematical model is developed to predict the size of microbubbles generated in a microfluidic bubble shrinkage platform.
Effects of ionic liquids on the nanoscopic dynamics and phase behaviour of a phosphatidylcholine membrane
Authors: Sharma V. K. , Ghosh S. K. , Mandal P. , Yamada T. , Shibata K. , Mitra S. , Mukhopadhyay R.
Published: November 2017

Ionic liquids (ILs) are potential candidates for new antimicrobials due to their tunable antibacterial properties. Effects of ILs on lipid membranes are investigated to address the growing challenge of bacterial resistance.
A polymer transistor array with a pressure-sensitive elastomer for electronic skin
Authors: Kyaw Aung Ko Ko , Loh Hiok Huang Clara , Yan Fei , Xu Jianwei
Published: November 2017

A pressure-sensitive elastomer was employed as a dielectric layer of a polymer transistor for electronic skin.
Pressure-induced irreversible amorphization and metallization with a structural phase transition in arsenic telluride
Authors: Dai Lidong , Zhuang Yukai , Li Heping , Wu Lei , Hu Haiying , Liu Kaixiang , Yang Linfei , Pu Chang
Published: November 2017

A crystalline to amorphous and metallic transition was demonstrated by impedance spectroscopy, Raman spectroscopy, AFM and HRTEM in DAC.
Personalized medicine—a modern approach for the diagnosis and management of hypertension
Authors: Savoia Carmine , Volpe Massimo , Grassi Guido , Borghi Claudio , Agabiti Rosei Enrico , Touyz Rhian M.
Published: November 2017

The main goal of treating hypertension is to reduce blood pressure to physiological levels and thereby prevent risk of cardiovascular disease and hypertension-associated target organ damage. Despite reductions in major risk factors and the availability of a plethora of effective antihypertensive drugs, the control of blood pressure to target values is still poor due to multiple factors including apparent drug resistance and lack of adherence. An explanation for this problem is related to the current reductionist and ‘trial-and-error’ approach in the management of hypertension, as we may oversimplify the complex nature of the disease and not pay enough attention to the heterogeneity of the pathophysiology and clinical presentation of the disorder. Taking into account specific risk factors, genetic phenotype, pharmacokinetic characteristics, and other particular features unique to each patient, would allow a personalized approach to managing the disease. Personalized medicine therefore represents the tailoring of medical approach and treatment to the individual characteristics of each patient and is expected to become the paradigm of future healthcare. The advancement of systems biology research and the rapid development of high-throughput technologies, as well as the characterization of different –omics, have contributed to a shift in modern biological and medical research from traditional hypothesis-driven designs toward data-driven studies and have facilitated the evolution of personalized or precision medicine for chronic diseases such as hypertension.
The shifted balance between circulating follicular regulatory T cells and follicular helper T cells in patients with ulcerative colitis
Authors: Wang Xinrui , Zhu Yonggang , Zhang Manli , Hou Jie , Wang Hongjuan , Jiang Yanfang , Wang Haifeng , Gao Pujun
Published: November 2017

B-cell immunity participates in the pathogenesis of ulcerative colitis (UC). The immune balance between follicular regulatory T (TFR) cells and follicular helper T (TFH) cells is important in regulating B-cell responses. However, the alteration of TFR/TFH balance in UC remains unclear. Peripheral blood from 25 UC patients and 15 healthy controls was examined for the frequencies of circulating TFR, TFH, and regulatory T (Treg) cells by flow cytometry. Levels of serum cytokines were measured using cytometric bead array (CBA). Disease activity was evaluated by the Mayo Clinic Score. Compared with controls, UC patients exhibited significant reductions in circulating Foxp3+CXCR5+ TFR cells, the subset interleukin (IL)-10+Foxp3+CXCR5+ cells, and Treg cells, but significant expansions in Foxp3−CXCR5+ TFH cells and IL-21+Foxp3−CXCR5+ cells. UC patients also had reduced levels of serum IL-10 and elevated levels of serum IL-21. The values of Mayo Clinic Score, C-reactive protein (CRP), or erythrocyte sedimentation rate (ESR) in UC patients were negatively correlated with circulating TFR cells, serum IL-10 level, and TFR/TFH ratio, while positively correlated with circulating TFH cells and serum IL-21 level. Alterations in circulating TFR and TFH cells shift the balance from immune tolerance to immune responsive state, contributing to dysregulated B-cell immunity and the pathogenesis of UC.
The Impact of Expiratory Muscle Strength Training on Speech Breathing in Individuals With Parkinson's Disease: A Preliminary Study
Authors: Darling-White Meghan , Huber Jessica E.
Published: November 2017

Purpose

The purpose of this study was to examine the impact of expiratory muscle strength training on speech breathing and functional speech outcomes in individuals with Parkinson's disease (PD).

Method

Twelve individuals with PD were seen once a week for 8 weeks: 4 pretraining (baseline) sessions followed by a 4-week training period. Posttraining data were collected at the end of the 4th week of training. Maximum expiratory pressure, an indicator of expiratory muscle strength, and lung volume at speech initiation were the primary outcome measures. Secondary outcomes included lung volume at speech termination, lung volume excursion, utterance length, and vocal intensity. Data were collected during a spontaneous speech sample. Individual effect sizes > 1 were considered significant.

Results

Maximum expiratory pressure increased in a majority of participants after training. Training resulted in 2 main respiratory patterns: increasing or decreasing lung volume initiation. Lung volume termination and excursion, utterance length, and vocal loudness were not consistently altered by training.

Conclusions

Preliminary evidence suggests that the direct physiologic intervention of the respiratory system via expiratory muscle strength training improves speech breathing in individuals with PD, with participants using more typical lung volumes for speech following treatment.
Not All Pacifiers Are Created Equal: A Mechanical Examination of Pacifiers and Their Influence on Suck Patterning
Authors: Zimmerman Emily , Forlano Jaclene , Gouldstone Andrew
Published: November 2017

Purpose

Many pacifier companies advertise that their product is the “best choice” to support proper sucking, feeding, and dental development; however, very little evidence exists to support these claims. As the primary differences across pacifiers are structural and mechanical, the goals of this study were to measure such properties of commercially available pacifiers and to examine how these properties alter suck patterning in healthy, full-term infants.

Method

Seven commonly utilized pacifiers were mechanically tested for pull and compression stiffness levels and categorized into nipple shape types based on their aspect ratio. Next, 3 pacifiers (Soothie, GumDrop, and Freeflow) with the most salient differences in pull stiffness levels with 2 different pacifier nipple types were tested clinically on 16 full-term infants (≤ 6 months old) while measuring non-nutritive suck (NNS).

Results

A repeated measures analysis of variance revealed significant differences between NNS burst duration (p= .002), NNS cycles per burst (p= .002), and NNS cycles per minute (p= .006) and pacifier type. With each significant dependent measure, pairwise comparisons showed that the GumDrop and Freeflow pacifiers differed significantly on these measures.

Conclusions

Pacifier compression, pull stiffness, and nipple shape type yield different NNS dynamics. These findings motivate further investigation into pacifier properties and suck patterning in young infants.
Intensive Treatment for Persisting Rhotic Distortions: A Case Series
Authors: Preston Jonathan L. , Leece Megan C.
Published: November 2017

Purpose

The study explored changes in accuracy of American English rhotics as a result of an intensive 1-week therapy program for adolescents and young adults with residual speech sound errors that had not resolved with previous therapy.

Method

Four case reports are presented of individuals aged 13, 17, 21, and 22 years with residual /ɹ/ distortions. Each participant attended a 1-week intensive program consisting of pretreatment assessments, 14 hr of therapy, and posttreatment assessment. Treatment sessions included structured motor-based practice, ultrasound visual feedback of the tongue, and auditory speech perception training. To assess generalization, untreated words and sentences with rhotics were recorded before and after therapy; these were rated by listeners who were blind to when the recordings were taken.

Results

All participants showed measurable and statistically significant improvement in speech sound accuracy. Averaged across the 4 participants, rhotic accuracy at the word level improved from 35% to 83%. At the sentence level, rhotic accuracy increased from 11% pretreatment to 66% posttreatment in 1 week.

Conclusion

The promise of an intensive treatment program that includes motor-based practice, biofeedback, and auditory perception training is illustrated by the case presentations in which substantial improvements in speech sound accuracy were observed.

Supplemental Materials

https://doi.org/10.23641/asha.5561254
Infant-Directed Speech Enhances Attention to Speech in Deaf Infants With Cochlear Implants
Authors: Wang Yuanyuan , Bergeson Tonya R. , Houston Derek M.
Published: November 2017

Purpose

Both theoretical models of infant language acquisition and empirical studies posit important roles for attention to speech in early language development. However, deaf infants with cochlear implants (CIs) show reduced attention to speech as compared with their peers with normal hearing (NH; Horn, Davis, Pisoni, & Miyamoto, 2005; Houston, Pisoni, Kirk, Ying, & Miyamoto, 2003), which may affect their acquisition of spoken language. The main purpose of this study was to determine (a) whether infant-directed speech (IDS) enhances attention to speech in infants with CIs, as compared with adult-directed speech (ADS), and (b) whether the degree to which infants with CIs pay attention to IDS is associated with later language outcomes.

Method

We tested 46 infants—12 prelingually deaf infants who received CIs before 24 months of age and had 12 months of hearing experience (CI group), 22 hearing experience–matched infants with NH (NH-HEM group), and 12 chronological age–matched infants with NH (NH-CAM group)—on their listening preference in 3 randomized blocks: IDS versus silence, ADS versus silence, and IDS versus ADS. We administered the Preschool Language Scale–Fourth Edition (PLS-4; Zimmerman, Steiner, & Pond, 2002) approximately 18 months after implantation to assess receptive and expressive language skills of infants with CIs.

Results

In the IDS versus silence block, all 3 groups looked significantly longer to IDS than to silence. In the ADS versus silence block, both the NH-HEM and NH-CAM groups looked significantly longer to ADS relative to silence; however, the CI group did not show any preference. In the IDS versus ADS block, whereas both the CI and NH-HEM groups preferred IDS over ADS, the NH-CAM group looked equally long to IDS and ADS. IDS preference quotient among infants with CIs in the IDS versus ADS block was associated with PLS-4 Auditory Comprehension and PLS-4 Expressive Communication measures.

Conclusions

Two major findings emerge: (a) IDS enhances attention to speech in deaf infants with CIs; (b) the degree of IDS preference over ADS relates to language development in infants with CIs. These results support a focus on input in developing intervention strategies to mitigate the effects of hearing loss on language development in infants with hearing loss.
Distributional Learning in College Students With Developmental Language Disorder
Authors: Hall Jessica , Owen Van Horne Amanda , McGregor Karla K. , Farmer Thomas
Published: November 2017

Purpose

This study examined whether college students with developmental language disorder (DLD) could use distributional information in an artificial language to learn about grammatical category membership in a way similar to their typically developing (TD) peers.

Method

Seventeen college students with DLD and 17 TD college students participated in this task. We used an artificial grammar in which certain combinations of words never occurred during training. At test, participants had to use knowledge of category membership to determine which combinations were allowable in the grammar, even though they had not been heard.

Results

College students with DLD performed similarly to TD peers in distinguishing grammatical from ungrammatical combinations.

Conclusion

Differences in ratings between grammatical and ungrammatical items in this task suggest that college students with DLD can form grammatical categories from novel input and more broadly use distributional information.
Academic Vocabulary Learning in First Through Third Grade in Low-Income Schools: Effects of Automated Supplemental Instruction
Authors: Goldstein Howard , Ziolkowski Robyn A. , Bojczyk Kathryn E. , Marty Ana , Schneider Naomi , Harpring Jayme , Haring Christa D.
Published: November 2017

Purpose

This study investigated cumulative effects of language learning, specifically whether prior vocabulary knowledge or special education status moderated the effects of academic vocabulary instruction in high-poverty schools.

Method

Effects of a supplemental intervention targeting academic vocabulary in first through third grades were evaluated with 241 students (6–9 years old) from low-income families, 48% of whom were retained for the 3-year study duration. Students were randomly assigned to vocabulary instruction or comparison groups.

Results

Curriculum-based measures of word recognition, receptive identification, expressive labeling, and decontextualized definitions showed large effects for multiple levels of word learning. Hierarchical linear modeling revealed that students with higher initial Peabody Picture Vocabulary Test–Fourth Edition scores (Dunn & Dunn, 2007) demonstrated greater word learning, whereas students with special needs demonstrated less growth in vocabulary.

Conclusion

This model of vocabulary instruction can be applied efficiently in high-poverty schools through an automated, easily implemented adjunct to reading instruction in the early grades and holds promise for reducing gaps in vocabulary development.
Synthesis of uniformly excited sparse planar array with multiple constraints
Authors: Dai Dingcheng , Yao Minli , Jin Wei , Zhang Fenggan
Published: November 2017

To obtain low peak sidelobe level of the uniformly excited sparse planar array, a modified matrix mapping method is proposed to transform the multi‐constraints optimisation problem to the unconstraint. The multiple constraints include the elements quantities, the aperture sizes and the minimum inter‐elements spacing. A proportion compression function is established to meet all the constraints. Thus, the infeasible solutions can be excluded from the solutions set during the optimisation process. The simulation results show the effectiveness of the proposed method.
Investigating effect of temperature on barrier height of PWB diodes
Authors: Akura M. , Dunn G.M.
Published: November 2017

The effect of temperature on the barrier height of a gallium arsenide (GaAs)/aluminium GaAs (AlGaAs) potential‐well barrier (PWB) diodes is investigated and reported in this Letter. It was found that more electrons diffuse from the doped AlGaAs(silicon) into the undoped layers with increasing temperature, this modifies the electric field along these layers and hence the barrier height. The barrier height increases with increasing temperature at an increasing rate of – in the temperature range of 200–380 K in a similar way to the planar‐doped barrier (PDB) diode. The result of the computer simulations, however, shows that the PWB diode is less sensitive than the PDB diode due to the active nature of the charge in the well.
Low overhead channel tracking strategy for millimetre wave multiple‐input multiple‐output system
Authors: Li Gaosi , Wei Zaixue , Zhang Xin , Yang Dacheng
Published: November 2017

In this, study, a new channel tracking algorithm for time‐varying millimetre wave (mmWave) system is proposed. The transmitter employs hybrid beamforming architecture which is generally adopted in mmWave system and the receiver is assumed to have perfect channel knowledge. Due to the short feedback interval in mmWave system, the authors propose a low overhead channel tracking algorithm in which the receivers feedback the channel state information every several channel indices. Obviously, the proposed channel tracking algorithm can reduce feedback times and improve feedback efficiency. Based on the mutual information analysis and 3 dB criterion on signal‐to‐noise ratio, the upper bound of the loss on system capacity and the maximum gap of discrete channel tracking, together with the desired number of data steam are given. Simulation results are presented to verify the analysis above and demonstrate the performance in discrete channel tracking.
Proportional‐type performance recovery current tracking control algorithm for PMSM
Authors: Kim Seok‐Kyoon
Published: November 2017

This study presents a proportional‐type non‐linear current control algorithm for permanent magnet synchronous motors (PMSMs) with performance recovery and offset‐free properties. The contribution falls into two parts. First, the disturbances from the model‐plant mismatch are exponentially estimated by the proposed first‐order convergent disturbance observers. Second, it is proven that the proposed algorithm guarantees the performance recovery and offset‐free properties, also stabilises the first‐order internal dynamics that arise from the PMSM speed dynamics. The closed‐loop performance was shown by the simulations and experiments by using a 5 kW interior PMSM.
Pole‐to‐ground fault ride through strategy for half‐/full‐bridge hybrid MMC‐based radial multi‐terminal HVDC systems with low‐impedance grounded
Authors: Lin Lei , He Zhen , Hu Jiabing , He Zhiyuan , Xu Kecheng
Published: November 2017

Pole‐to‐ground (PTG) fault is one of the most common DC‐side faults in multi‐terminal high‐voltage direct‐current (HVDC) systems. During the PTG fault, the loss of system transmission power is a challenging issue. This study proposes a PTG fault ride through strategy for low‐impedance grounded radial multi‐terminal HVDC systems. It is realised by the coordinated operation between half‐/full‐bridge hybrid modular multilevel converters and mechanical DC switches. The mechanical DC switch is utilised to isolate the fault and a ground return path is formed to transmit the active power during PTG fault. If the fault is located at the sending terminal, half of the rated transmission power can be kept at the entire fault duration. If the fault is located at the receiving terminal, the successfully restarted active power regulator stations can further return to normal operation after the isolation of the PTG fault. With the proposed strategy, the loss of transmission power during PTG fault is minimised, which can improve the transient angle stability of the AC grid. PSCAD/EMTDC simulation is performed to verify the proposed strategy.
Fuzzy logic gain‐tuned adaptive second‐order GI‐based multi‐objective control for reliable operation of grid‐interfaced photovoltaic system
Authors: Vedantham Srinivas , Kumar Shailendra , Singh Bhim , Mishra Sukumar
Published: November 2017

This study presents the fuzzy logic integrator gain‐tuned improved second‐order generalized integrator (GI) for a double‐stage grid‐interfaced photovoltaic (PV) system. The proposed system includes the functionalities of feeding active power to the grid, power factor correction, grid currents balancing and system isolation under grid side faults. Moreover, the smooth system operation is ensured under weak distribution grids where grid voltage is subject to huge diversions. Furthermore, automatic protection scheme for the system under grid‐side faults is also established with the proposed algorithm for increased reliability. The fuzzy‐tuned GI provides advantages of efficient and effective extraction of load current fundamental component under steady‐state and dynamic grid conditions. The non‐linear frequency error variation is compensated here using fuzzy logic‐based self‐tuning integrator gain of the controller. The controller is improved to mitigate the possible DC component in the load current. The neutral current in the loads is nullified by using a four wire system. The adaptive DC bus voltage helps to minimize the switching losses and prevents unexpected tripping of the PV inverter. The system is experimentally verified using a prototype built in the laboratory.
Perceptual video quality metric for compression artefacts: from two‐dimensional to omnidirectional
Authors: Zou Wenjie , Yang Fuzheng , Wan Shuai
Published: November 2017

In this study, the perceptual video quality (PVQ) for the vogue 360‐degree video with compression artefacts viewed on the visual reality (VR) head‐mounted display (HMD) is obtained for the first time by an elaborately designed subjective experiment. The characteristic of the PVQ of omnidirectional (360‐degree) video on the VR HMD and PC monitor is then investigated. The PVQ on the HMD is found to be linearly related to the video coding quality (VCQ) on the PC monitor. A quality evaluation model is then proposed based on the mapping formula and a new assessment parameter, where the impact of the video resolution and display device is involved. In this way, the traditional video quality assessment metrics for two‐dimensional video can be extended to assess the PVQ of the 360‐degree video viewed on the HMD. At last, the video structural similarity metric is taken as an example to predict the input of the proposed model, i.e. the VCQ of the 360‐degree video. Experimental results demonstrate that the proposed model can effectively and conveniently solve the challenge of PVQ assessment for the 360‐degree video with compression distortions on the HMD.
Pattern controlled and frequency tunable microstrip antenna loaded with multiple split ring resonators
Authors: Patel Shobhit Kumar , Argyropoulos Christos , Kosta Yogeshwar P.
Published: November 2017

We propose a reconfigurable design of a metamaterial‐inspired microstrip patch antenna, capable of tuning the frequency spectrum and beam radiation. The metamaterial component is composed of a three‐ring square split ring resonator (SRR) loaded in the antenna's substrate. Radiofrequency (RF) micro‐electro‐mechanical‐system (MEMS) switches are added in the gap of the proposed SRR to achieve frequency and radiation tuning in the performance of the microstrip patch antenna. The proposed reconfigurable antenna can be tuned to different frequencies depending on the operation states (no switching, one switch on, two switches on, and three switches on) of the SRR RF MEMS switches. The beam radiation can also be changed by setting in the ‘on’ state the SRR switches. Beam width and beam angle can be independently tuned depending on the four different switching states. The proposed pattern controlled and frequency tunable metamaterial antenna demonstrates efficient reconfigurable reflection coefficient, radiation pattern, and current density performance. The designed antenna will be applicable to C‐band long‐distance radio telecommunications.
Single‐phase hybrid cascaded H‐bridge and diode‐clamped multilevel inverter with capacitor voltage balancing
Authors: Castillo Richard , Diong Bill , Biggers Preston
Published: November 2017

Diode‐clamped and cascaded H‐bridge multilevel inverters are two of the main multilevel inverter topologies; each has its distinct advantages and drawbacks. Regarding the latter, cascaded H‐bridge inverters require multiple separate dc sources, whereas (semi‐active) diode‐clamped inverters contain capacitors that require a means to balance their voltages. This paper investigates a hybrid‐topology inverter, comprising a single‐phase five‐level semi‐active diode‐clamped inverter and a single‐phase cascaded H‐bridge inverter with their outputs connected in series, as one way to mitigate the drawbacks of each topology. The proposed control scheme for this inverter operates the switches at fundamental frequency to achieve capacitor voltage‐balancing while keeping the switching losses low. Moreover, the step‐angles are designed for the 13‐level and 11‐level output voltage waveform cases (as examples) for a fixed modulation index to achieve optimal total harmonic distortion. Furthermore, the scheme also achieves capacitor voltage‐balancing for modulation indices that are close to the optimal modulation index, and for a wide range of load power factors, albeit at the cost of increased output voltage distortion. Simulation results are presented to help explain the processes of capacitor recharging and voltage‐balancing, while experimental results are shown as verification of the expected behaviour of this inverter and the proposed control scheme.
Reduction of leakage inductance and AC resistance of planar transformers by optimising the current distribution
Authors: Rao Bo , Zhao Ying , Yang Yong , Gao Jun , Zhang Zhengqing , Zhou Song , Zhang Ming , Chen Zhipeng
Published: November 2017

Planar transformers (PTs) are becoming increasingly popular in high‐power density, high‐frequency SMPS in recent years due to their unique advantages including low profile structures and excellent thermal properties. This study focuses on detailed investigation of the effects of coil current distribution within each winding layer on leakage inductance and AC resistance of a PT, and an analytical derivation based on variational method is given. Then the optimal current distribution is proposed and verified through 3D finite element analysis simulation and physical experiments. The results show that the leakage inductance and AC resistance can be reduced further by optimising the current distribution. Accordingly, a practical implementation method is proposed to control the current distribution within a winding layer by adjusting the widths of conductors.
Time–frequency representation using IEVDHM–HT with application to classification of epileptic EEG signals
Authors: Sharma Rishi Raj , Pachori Ram Bilas
Published: November 2017

Time–frequency representation (TFR) is useful for non‐stationary signal analysis as it provides information about the time‐varying frequency components. This study proposes a novel TFR based on the improved eigenvalue decomposition of Hankel matrix and Hilbert transform (IEVDHM–HT). In the proposed method, first the authors decompose non‐stationary signals using the IEVDHM with suitably defined criterion for eigenvalue selection, requirement of number of iterations, and new component merging criteria. Furthermore, the HT is applied on extracted components in order to obtain the TFR of non‐stationary signals. The performance of proposed TFR has been evaluated on synthetic signals in clean and white noise environment with different signal‐to‐noise ratios. The proposed method gives good performance in terms of Rényi entropy measure in comparison with other existing methods. Application of the proposed TFR is also shown for the classification of epileptic seizure electroencephalogram (EEG) signals. The least‐square support vector machine (LS‐SVM) with radial basis function kernel is used for classification of seizure and seizure‐free EEG signals obtained from the publicly available database by the University of Bonn, Germany. The proposed method has achieved classification accuracy 100% for the studied EEG database.
The cycle shop scheduling: mathematical model, properties and solution algorithms
Authors: Naderia Bahman , Goharib Sheida
Published: November 2017

Conventionally, in scheduling problems it is assumed that each job visits each machine once. This paper studies a novel shop scheduling called cycle shop problems where jobs might return to each machine more than once. The problem is first formulated by two mixed integer linear programming models. The characteristics of the problem are analyzed, and it is realized that the problem suffers from a shortcoming called redundancy, i.e., several sequences represents the same schedule. In this regard, some properties are introduced by which the redundant sequences can be recognized before scheduling. Three constructive heuristics are developed. They are based on the shortest processing time first, insertion neighborhood search and non-delay schedules. Then, a metaheuristic based on scatter search is proposed. The algorithms are equipped with the redundancy prevention properties that greatly reduce the computational time of the algorithms. Two sets of experiments are conducted. The proposed model and algorithms are evaluated. The results show the high performance of model and algorithms.
Recent Advances in the Synthesis of β-Ketonitriles
Authors: Kiyokawa Kensuke , Minakata Satoshi , Nagata Takaya
Published: November 2017

β-Ketonitriles are an important class of compounds in the field of organic and medicinal chemistry. Over the past decades, numerous efforts have been devoted to the development of new and efficient methodologies for the synthesis of these derivatives, and a number of efficient methods to accomplish this have been developed in recent years. In this context, this short review highlights recent advances in the synthesis of β-ketonitriles.

1 Introduction

2 Acylation of Alkyl Nitriles

3 Electrophilic Cyanation of Ketone Enolates

4 Electrophilic Cyanation of β-Keto Carbonyl Compounds

5 Transition-Metal-Catalyzed Carbonylative Coupling Reactions

6 Miscellaneous Examples

7 Outlook
Glycosylation of Stannyl Ceramides Promoted by Modified Montmorillonite­ in Supercritical Carbon Dioxide
Authors: Morales-Serna José , Nguyen Bao , García-Ríos Eréndira , Gaviño Rubén , Cárdenas Jorge , García de la Mora Gustavo
Published: November 2017

The direct glycosylation of ceramides in supercritical carbon dioxide (scCO2) successfully proceeded to produce β-glycolipids in high yield and with full stereoselectivity. The reaction is promoted by montmorillonite modified with a superacid (CF3SO3H). The value of this protocol was demonstrated in the efficient synthesis of isoglobotrihexosylceramide (iGB3).
Improved Synthesis of Racemate and Enantiomers of Taniguchi Lactone and Conversion of Their C–C Double Bonds into Triple Bonds
Authors: Hammerschmidt Friedrich , Malová Križková Petra , Lindner Wolfgang
Published: November 2017

cis-2-Butene-1,4-diol was heated with triethyl orthoacetate and p-hydroquinone as catalyst at 170 °C to give racemic Taniguchi lactone. It was converted into diastereomeric amides with (S)-1-phenylethylamine for stereoisomer resolution. The double bonds of (±)-, (R)- and (S)-Taniguchi lactones were brominated and dehydrobrominated in two steps, using at first DBU and then LDA, to deliver the triple bonds.
Digitalisierung: Moderne Hard- und Software allein reichen nicht aus
Authors: Gocke Peter
Published: November 2017

Auch auf der diesjährigen Medica ist die Digitale Medizin als Trend-Thema verankert und hat mit dem Health IT Forum wieder einen eigenen Schwerpunkt.
Partikeltherapie: Protonen-High-Tech vor dem Aus?
Authors: König Romy
Published: November 2017

Das Protonentherapiezentrum in Thalkirchen bei München ist insolvent. Offenbar nahmen weniger Patienten die neue Art der Krebsbestrahlung, bei der hochenergetische Partikel auf den Tumor geschossen werden, in Anspruch als kalkuliert. Damit endet nicht nur das Lebenswerk eines Visionärs.
Klinik Unternehmen: Auf-/Absteiger des Monats
Authors: Schmidt Hartmut
Published: November 2017

Börsenexperte Hartmut Schmidt analysiert für kma die Jahresabschlüsse* ausgewählter Kliniken
MR-Linearbeschleuniger: Strahlentherapie der neuesten Generation
Authors: Zips Daniel , Thorwarth Daniela
Published: November 2017

Anfang September wurde an der Universitätsklinik für Radioonkologie in Tübingen mit der Installation des ersten 1.5 Tesla MR-Linearbeschleunigers Deutschlands begonnen. Das neuartige Großgerät steigert die Präzision bei der Strahlentherapie von Tumoren – und schont das gesunde Gewebe. Anfang 2018 sollen die ersten Patienten behandelt werden.
Sterilgutversorgung: Das sollten Sie zu den Kosten und Prozessen wissen
Authors: Krohn Markus , Mickley Thomas , Fleßa Steffen
Published: November 2017

In der Zentralen Sterilgutversorgungsabteilung (ZSVA) werden wiederverwendbare Medizinprodukte für die gesamte Klinik aufbereitet. Doch welche Kosten entstehen eigentlich bei der Produktion einer Sterilguteinheit? Und welche Rolle spielt die Arbeitsintensität der Mitarbeiter?
Industriekreis der WGKT: Industriekreis setzt wichtige Impulse
Authors: Kratzenberg Stefan
Published: November 2017

Mit Networking außerhalb des alltäglichen Marktdrucks möchte der Industriekreis der WGKT neue Denkanstöße geben – und dabei den wissenschaftlichen Innovationsaspekt fördern, z. B. durch Innovationspreise und die Zusammenarbeit mit Hochschulen.
Die infektiöse Hepatitis: extrahepatische Manifestationen und der Einfluss auf die antirheumatische Therapie
Authors: Ringelhan Marc , Geisler Fabian , Schmid Roland
Published: November 2017

Rheumatologische Beschwerden bei gleichzeitig vorliegender Infektion mit dem hepatotropen Hepatitis B (HBV) und Hepatitis C Virus (HCV) stellen häufig ein diagnostisches Dilemma dar, da beide Virusinfektionen neben einer Hepatitis, extrahepatische rheumatoide Manifestationen verursachen können. Beispielsweise ist das Auftreten von Arthralgien, einer Arthritis, einer Vaskulitis, als auch einer Sicca-Symptomatik möglich. Diese sprechen zumeist gut auf eine antivirale Therapie an. Als auslösende Pathomechanismen sind sowohl virusspezifische Faktoren, wie Immunkomplexe oder eine Stimulation von B-Zellen, als auch patientenspezifische Faktoren bekannt. Zugleich schließt eine HBV oder HCV Infektion eine zeitgleiche, nicht virusassoziierte rheumatische Erkrankung nicht aus, deren Diagnostik bei unspezifischer Erhöhung von Autoantikörpern im Rahmen einer HBV oder HCV Infektion häufig erschwert ist. Darüber hinaus stellen vor allem auch moderne antirheumatische Therapien im Falle einer chronischen Virushepatitis ein signifikantes Risiko für eine Reaktivierung bis hin zum fulminanten Leberversagen dar. Im Folgenden gehen wir daher auf häufige extrahepatische Manifestationen der Hepatitis B und C ein, welche eine relevante Differenzialdiagnose für die rheumatologische Praxis darstellen. Zudem werden aktuelle Empfehlungen und Risiken der Anwendung antirheumatischer Therapien bei Patienten mit rheumatologischen Erkrankungen und chronischer HBV oder HCV Infektion diskutiert.