bluuebunny/crossref_metadata_2025 huggingface dataset:
Directly imaging excited state-resolved transient structures of water induced by valence and inner-shell ionisation
Authors: Wang Zhenzhen , Hu Xiaoqing , Xue Xiaorui , Zhou Shengpeng , Li Xiaokai , Yang Yizhang , Zhou Jiaqi , Shu Zheng , Zhao Banchi , Yu Xitao , Gong Maomao , Wang Zhenpeng , Ma Pan , Wu Yong , Chen Xiangjun , Wang Jianguo , Ren Xueguang , Wang Chuncheng , Ding Dajun
Published: September 2023

Real-time imaging of transient structure of the electronic excited state is fundamentally critical to understand and control ultrafast molecular dynamics. The ejection of electrons from the inner-shell and valence level can lead to the population of different excited states, which trigger manifold ultrafast relaxation processes, however, the accurate imaging of such electronic state-dependent structural evolutions is still lacking. Here, by developing the laser-induced electron recollision-assisted Coulomb explosion imaging approach and molecular dynamics simulations, snapshots of the vibrational wave-packets of the excited (A) and ground states (X) of D2O+ are captured simultaneously with sub-10 picometre and few-femtosecond precision. We visualise that θDOD and ROD are significantly increased by around 50∘ and 10 pm, respectively, within approximately 8 fs after initial ionisation for the A state, and the ROD further extends 9 pm within 2 fs along the ground state of the dication in the present condition. Moreover, the ROD can stretch more than 50 pm within 5 fs along autoionisation state of dication. The accuracies of the results are limited by the simulations. These results provide comprehensive structural information for studying the fascinating molecular dynamics of water, and pave the way towards to make a movie of excited state-resolved ultrafast molecular dynamics and light-induced chemical reaction.
Placental growth factor exerts a dual function for cardiomyogenesis and vasculogenesis during heart development
Authors: Witman Nevin , Zhou Chikai , Häneke Timm , Xiao Yao , Huang Xiaoting , Rohner Eduarde , Sohlmér Jesper , Grote Beverborg Niels , Lehtinen Miia L. , Chien Kenneth R. , Sahara Makoto
Published: September 2023

Cardiogenic growth factors play important roles in heart development. Placental growth factor (PLGF) has previously been reported to have angiogenic effects; however, its potential role in cardiogenesis has not yet been determined. We analyze single-cell RNA-sequencing data derived from human and primate embryonic hearts and find PLGF shows a biphasic expression pattern, as it is expressed specifically on ISL1+ second heart field progenitors at an earlier stage and on vascular smooth muscle cells (SMCs) and endothelial cells (ECs) at later stages. Using chemically modified mRNAs (modRNAs), we generate a panel of cardiogenic growth factors and test their effects on enhancing cardiomyocyte (CM) and EC induction during different stages of human embryonic stem cell (hESC) differentiations. We discover that only the application of PLGF modRNA at early time points of hESC-CM differentiation can increase both CM and EC production. Conversely, genetic deletion of PLGF reduces generation of CMs, SMCs and ECs in vitro. We also confirm in vivo beneficial effects of PLGF modRNA for development of human heart progenitor-derived cardiac muscle grafts on murine kidney capsules. Further, we identify the previously unrecognized PLGF-related transcriptional networks driven by EOMES and SOX17. These results shed light on the dual cardiomyogenic and vasculogenic effects of PLGF during heart development.
An artificial intelligence algorithm for automated blastocyst morphometric parameters demonstrates a positive association with implantation potential
Authors: Fruchter-Goldmeier Yael , Kantor Ben , Ben-Meir Assaf , Wainstock Tamar , Erlich Itay , Levitas Eliahu , Shufaro Yoel , Sapir Onit , Har-Vardi Iris
Published: September 2023

Blastocyst selection is primarily based on morphological scoring systems and morphokinetic data. These methods involve subjective grading and time-consuming techniques. Artificial intelligence allows for objective and quick blastocyst selection. In this study, 608 blastocysts were selected for transfer using morphokinetics and Gardner criteria. Retrospectively, morphometric parameters of blastocyst size, inner cell mass (ICM) size, ICM-to-blastocyst size ratio, and ICM shape were automatically measured by a semantic segmentation neural network model. The model was trained on 1506 videos with 102 videos for validation with no overlap between the ICM and trophectoderm models. Univariable logistic analysis found blastocyst size and ICM-to-blastocyst size ratio to be significantly associated with implantation potential. Multivariable regression analysis, adjusted for woman age, found blastocyst size to be significantly associated with implantation potential. The odds of implantation increased by 1.74 for embryos with a blastocyst size greater than the mean (147 ± 19.1 μm). The performance of the algorithm was represented by an area under the curve of 0.70 (p < 0.01). In conclusion, this study supports the association of a large blastocyst size with higher implantation potential and suggests that automatically measured blastocyst morphometrics can be used as a precise, consistent, and time-saving tool for improving blastocyst selection.
HMGCS2 serves as a potential biomarker for inhibition of renal clear cell carcinoma growth
Authors: Mao Huajie , Wang Runzhi , Shao Fengling , Zhao Ming , Tian Dayu , Xia Hua , Zhao Ya
Published: September 2023

3-Hydroxymethylglutaryl-CoA synthase 2 (HMGCS2) is the rate-limiting enzyme for ketone body synthesis, and most current studies focus on mitochondrial maturation and metabolic reprogramming. The role of HMGCS2 was evaluated in a pan-cancer multi-database using R language, and HMGCS2 was lowly expressed or not differentially expressed in all tumor tissues compared with normal tissues. Correlation analysis of clinical case characteristics, genomic heterogeneity, tumor stemness, and overall survival revealed that HMGCS2 is closely related to clear cell renal cell carcinoma (KIRC). Single-cell sequencing data from normal human kidneys revealed that HMGCS2 is specifically expressed in proximal tubular cells of normal adults. In addition, HMGCS2 is associated with tumor immune infiltration and microenvironment, and KIRC patients with low expression of HMGCS2 have worse prognosis. Finally, the results of cell counting kit 8 assays, colony formation assays, flow cytometry, and Western blot analysis suggested that upregulation of HMGCS2 increased the expression of key tumor suppressor proteins, inhibited the proliferation of clear cell renal cell carcinoma cells and promoted cell apoptosis. In conclusion, HMGCS2 is abnormally expressed in pan-cancer, may play an important role in anti-tumor immunity, and is expected to be a potential tumor prognostic marker, especially in clear cell renal cell carcinoma.
Association of clot ultrastructure with clot perviousness in stroke patients
Authors: Kim Young Dae , Kwon Il , Park Youngseon , Lee Hyungwoo , Lee Il Hyung , Lim In Hwan , Hong Soon-Ho , Lee Hye Sun , Nam Hyo Suk , Heo Ji Hoe
Published: September 2023

Clot perviousness on computerized tomography (CT) is predictive of response to reperfusion therapy. This study aimed to determine the association of clot perviousness with ultrastructural features of clot in stroke patients undergoing endovascular thrombectomy. We quantitatively analyzed the ultrastructural components identified using scanning electron microscopy. The clot components were determined in the inner portions of the clots. Clot perviousness was assessed as thrombus attenuation increase (TAI) using noncontrast CT and CT angiography. We compared the association between the identified ultrastructural components and clot perviousness. The proportion of pores consisted of 3.5% on scanning electron microscopy images. The proportion of porosity in the inner portion was 2.5%. Among the ultrastructural components, polyhedrocytes were most commonly observed. The mean TAI was 9.3 ± 10.0 (median 5.6, interquartile range 1.1–14.3) Hounsfield units. TAI correlated positively with inner porosity (r = 0.422, p = 0.020). Among the ultrastructural clot components, TAI was independently associated with polyhedrocytes (B = − 0.134, SE = 0.051, p = 0.008). Clot perviousness is associated with porosity and the proportion of polyhdrocytes of clots.
Interaction of dietary patterns with rs28362491 on severity of coronary artery stenosis in patients undergoing coronary angiography
Authors: Darabi Zahra , Seyed Hosseini Seyed Mostafa , Sarebanhassanabadi Mohammadtaghi , Jambarsang Sara , Vahidi Mehrjardi Mohammad Yahya , Hosseinzadeh Mahdieh , Beigrezaei Sara , Vasmehjani Azam Ahmadi , Taftian Marzieh , Arabi Vahid , Motallaei Maryam , Yazdi Faezeh Golvardi , Salehi-Abargouei Amin , Nadjarzadeh Azadeh
Published: September 2023

Coronary artery disease (CAD) is one of the most important cardiovascular diseases. Lifestyle and genetic factors play important roles in the development of CAD. The aim of the study is to examine the interaction of dietary patterns and genes on the likelihood of abnormal lipid profile and coronary artery stenosis in Iranians undergoing coronary angiography. This cross-sectional study was performed on 440 patients who underwent coronary angiography. The factor analysis method was used to extract dietary patterns. Commercial kits have been used to assess biochemical parameters. The detection of the rs28362491 genotype was carried out by the method of restriction fragment length polymorphism. Traditional (TDP) and western dietary pattern (WDP) were extracted. We observed an interaction of adherence to TDP and rs28362491 on the odds of having a high Gensini score. These interactions indicated that higher adherence to TDP was associated with higher odds of having a high Gensini score for patients with DD genotype than for those with II genotype. (OR 2.33, 95%CI 1.00–5.44; P = 0.05). These interactions remained statistically significant even after confounder variables. We observed an interaction between higher adherence to TDP and rs28362491 variants on the odds of high low-density lipoprotein cholesterol levels (P = 0.04) in the unadjusted model. We found a significant interaction of this polymorphism and higher adherence to WDP on the odds of having a high Gensini score in the unadjusted model (P = 0.04). This study provides a basis for future research on NF-KB1 gene and diet interaction. More large-scale longitudinal studies are needed to validate these findings.
Influence of azacycle donor moieties on the photovoltaic properties of benzo[c][1,2,5]thiadiazole based organic systems: a DFT study
Authors: Shafiq Iqra , Khalid Muhammad , Asghar Muhammad Adnan , Baby Rabia , Braga Ataualpa A. C. , Alshehri Saad M. , Ahmed Sarfraz
Published: September 2023

Fullerene free organic chromophores are widely utilized to improve the efficacy of photovoltaic materials. Herein, we designed D-π-A-π-D form chromophores (TAZD1-TAZD5) via end-capped redistribution of donor moieties by keeping the same π-bridge and central acceptor unit for organic solar cells (OSCs). To analyze the photovoltaic characteristics of these derivatives, DFT estimations were accomplished at B3LYP/6–311 G (d,p) functional. Different investigations like frontier molecular orbital (FMO), absorption spectra (UV–Vis), density of states (DOS), binding energy (Eb), open circuit voltage (Voc), and transition density matrix (TDMs) were performed to examine the optical, photophysical and electronic characteristics of afore-mentioned chromophores. A suitable band gap (∆E = 2.723–2.659 eV) with larger bathochromic shift (λmax = 554.218–543.261 nm in acetonitrile) was seen in TAZD1-TAZD5. An effective charge transference from donor to acceptor via spacer was observed by FMO analysis which further supported by DOS and TDM. Further, lower binding energy values also supported the higher exciton dissociation and greater CT in TAZD1-TAZD5. Among all the designed chromophores, TAZD5 exhibited the narrowest Egap (2.659 eV) and maximum red-shifted absorption in solvent as well as gas phase i.e. 554.218 nm and 533.219 nm, respectively which perhaps as a result of the phenothiazine-based donor group (MPT). In a nutshell, all the tailored chromophores can be considered as efficient compounds for promising OSCs with a good Voc response, interestingly, TAZD5 is found to be excellent chromophores as compared to all these designed compounds.
Magnetic signature reproduction of ferromagnetic ships at arbitrary geographical position, direction and depth using a multi-dipole model
Authors: Woloszyn Miroslaw , Tarnawski Jarosław
Published: September 2023

The reproduction of magnetic signatures is an important issue concerning the safety of ship traffic, as well as the identification and classification of vessels. Moreover, military applications of magnetic signatures and their reproduction refer to the activation or protection against activation of magnetic naval mines. Previous works on this subject focused on recording and replicating the signatures under the same conditions as those under which they were measured, e.g., on the same ship courses. In this article, much greater capabilities of the multi-dipole model are presented, including simultaneous identification of permanent and induced magnetism. Determining the dipole values using the data from cardinal directions gives the possibility of determining the magnetic field density at any trajectory (position), direction, or depth, with further reconstruction of the entire magnetic field on the basis of residual measurements. For the purpose of this article, a numerical test model of a corvette-type ship has been modelled in Opera simulation software for different geographical positions. The synthetic data from the simulator served as the data source for determining the parameters of the multi-dipole model and the reference data for the verification of the signatures reconstructed for other positions, directions, and depths than those used to determine the model parameters. To determine all permanent magnetization components, data sets were used for two different values of the external magnetic field vertical component. Finally, as a culmination of the demonstration of model universality, the entire magnetic field around the ship was reproduced for different control points on Earth, and for different courses and depths. Investigating the possibility of reconstructing the magnetic signature at a different geographic location than the place where the measurement was made for model synthesis is the main original issue considered in this paper.
Elucidation of N-/O-glycosylation and site-specific mapping of sialic acid linkage isomers of SARS-CoV-2 human receptor angiotensin-converting enzyme 2
Authors: Wei Liming , Chen Yuning , Feng Xiaoxiao , Yao Jun , Zhang Lei , Zhou Xinwen , Yan Guoquan , Qiu Hong , Wang Chunhe , Lu Haojie
Published: September 2023

The N-/O-glycosylation and site-specific mapping of sialic acid linkage isomers of hACE2 were characterized, and which might give the clue for illustrating of the interaction between host cell and infection virus.
Recent progress in quantitative technologies for the analysis of cancer-related exosome proteins
Authors: Ma Zhongwen , Xu Huiying , Ye Bang-Ce
Published: September 2023

In this review, we summarize the recent advances in quantitative technologies for the analysis of cancer-related exosome proteins according to probe and sensing strategies and discuss the challenges and prospects of exosome protein detection methods.
Rapid probing of glucose influx into cancer cell metabolism: using adjuvant and a pH-dependent collection of central metabolites to improve in-cell D-DNP NMR
Authors: Sannelli Francesca , Wang Ke-Chuan , Jensen Pernille Rose , Meier Sebastian
Published: September 2023

Using an NMR assay with hyperpolarized glucose and NMR silent additive, we find that a recently proposed effect of pyruvate in the tumor environment is paralleled by a rerouting of cancer cell metabolism towards producing building blocks.
Mechanical milling processed highly luminescent Cs–Pb–Br perovskite emitters
Authors: Zhang Teng , Bai Youru , Feng Shaohuan , Xue Qifan , Hu Xiaotian , Xu Xueqing , Liu Heyuan , Luponosov Yuriy N. , Niazi Muhammad Bilal Khan , Li Xiyou
Published: September 2023

We report well-dispersed highly emitting perovskite emitters synthesized via the surfactant-assisted ball-milling method.
The electrochemically enabled α-C(sp3)–H azolation of ketones
Authors: Fang Songlin , Zhong Kaihui , Zeng Shaogao , Hu Xinwei , Sun Pinghua , Ruan Zhixiong
Published: September 2023

We herein reported an electrochemical synthesis of α-tetrazolyl ketones by C–H/N–H cross-coupling with excellent yields and broad substrate scope, encompassing various aryl ketones, heterocycles, and alkyl ketone drugs.
Post-synthetic modifications of covalent organic frameworks (COFs) for diverse applications
Authors: Rejali Narges Abdolhossein , Dinari Mohammad , Wang Yong
Published: September 2023

Post-synthetic modification of COFs are helpful strategies for introducing functionalities into them when the direct synthetic approach cannot be employed for diverse application.
Polarization-tunable interfacial properties in monolayer-MoS2 transistors integrated with ferroelectric BiAlO3(0001) polar surfaces
Authors: Yuan Jin , Dai Jian-Qing , Liu Yu-Zhu , Zhao Miao-Wei
Published: September 2023

Our work has instructive implications for developing energy-efficient and high-performance in-memory computing electronics based on 2D TMD materials integrated with ferroelectric polar surfaces.
Hydrogen-migration governed dynamic magnetic coupling characteristics in nitrogen-vacancy-hydrogen nanodiamonds
Authors: Song Yamin , Lin Xuexing , Yu Shaofen , Bu Yuxiang , Song Xinyu
Published: September 2023

Hydrogen-migration mobility enables hydrogen-doped nitrogen-vacancy nanodiamonds to exhibit rich dynamic magnetic coupling characteristics.
Glass-like behavior of intercalated organic solvents in graphite oxide detected by spin-probe EPR
Authors: Syryamina Victoria N. , Astvatsaturov Dmitry A. , Dzuba Sergei A. , Chumakova Natalia A.
Published: September 2023

Membranes based on graphite oxide (GO) are promising materials for the separation of polar liquids and gases.
Insights into the synergistic catalytic mechanism on the customized dual sites of an efficient ORR catalyst
Authors: Zhao Jinyu , Chen Xu , Lian Jie , Gao Yu , Zhang Yixing , Wang Xiaomin
Published: September 2023

A compelling PtCo/PC-2 catalyst has been developed and proved to be in double active sites to promote the ORR process along the associative pathway.
Effects of lipid extract from blue mussel (Mytilus edulis) on gut microbiota, and its relationship with glycemic traits in type 2 diabetes mellitus patients: a double-blind randomized controlled trial
Authors: Liu Shiyi , Kuang Xiaotong , Song Xiaolei , Li Huiying , Shao Xianfeng , Gao Tianlin , Guo Xiaofei , Li Shan , Liu Run , Li Kelei , Li Duo
Published: September 2023

Blue mussel lipid extract improved glycemic traits by decreasing the abundance of Erysipelotrichaceae and Turicibacter.
Organoborane-catalysed reductive depolymerisation of catechyl lignin under ambient conditions
Authors: Su Shihao , Cao Fan-shu , Wang Shuizhong , Shen Qingru , Luo Gen , Lu Qiang , Song Guoyong
Published: September 2023

C-lignin biopolymers can be efficiently depolymerized into catechol derivatives with 85% yield and 91% selectivity at room temperature and ambient pressure in highly concentrated form (300 mg mL−1) over an organoborane catalyst.
Feedstock agnostic upcycling of industrial mixed plastic from shredder residue pragmatically through a composite approach
Authors: Singkronart Kanjanawadee , Gaduan Andre , Shamsuddin Siti Rosminah , Ward Keeran , Lee Koon-Yang
Published: September 2023

We have developed a feedstock agnostic composite approach to upgrade the properties of industiral mixed plastic from shredder residue, reducing our reliance on fossil-derived virgin polymers for advanced engineering applications.
The effect of resonance-assisted hydrogen bond on the second-order nonlinear optical properties of pyridine hydrazone photoswitches: a quantum chemistry investigation
Authors: Hannachi Douniazed , Khelfaoui Noureddine , Zaidi Meriem , Yahiaoui Diha , Lakehal Salima , Morell Christophe , Chermette Henry
Published: September 2023

The combination between photochromic, NLO responses, and RAHB.
1,2,3-Triazole-containing flex-nucleoside analogs and sulfonamido-ribofuranoside conjugates: design, synthesis, and antiproliferative potential
Authors: Saftić Dijana Pavlović , Ban Željka , Špoljarić Katarina Mišković , Glavaš-Obrovac Ljubica , Žinić Biserka
Published: September 2023

The design and synthesis of new C5-[1,2,3]triazolyl-uracil/uridine fleximers and 1,2,3-triazolyl-sulfonamido-ribofuranoside conjugates useful as versatile building blocks for the preparation of more complex molecules is described.
CdTe magic-size cluster synthesis via a cation exchange method and conversion mechanism
Authors: Lin Zhuohan , Zhang Xin , Zhang Xue , Song Qianqian , Li Yan
Published: September 2023

The single-ensemble CdTe magic-size clusters (MSCs) were synthesized for the first time by cation exchange at room temperature using ZnTe MSCs as templates. The conversion from ZnTe MSCs into CdTe MSCs is assisted by precursor compounds.
Chiral lanthanide–silver(i) cluster-based metal–organic frameworks exhibiting solvent stability, and tunable photoluminescence
Authors: He Sheng-Rong , Xu Han , Chen Cheng , Wang Xue-Tao , Lu Tian-Qi , Cao Lingyun , Zheng Jun , Zheng Xiu-Ying
Published: September 2023

Three pairs of chiral Ln-Ag(I) cluster-based MOFs showed the desired tunable photoluminescence from {Ag5S6} to Ln3+ by introducing Ln3+ ions with different emission band and controlling different excitation wavelengths.
Expression of concern: Synthesis of MA POSS–PMMA as an intraocular lens material with high light transmittance and good cytocompatibility
Authors: Wang Bailiang , Lin Quankui , Shen Chenghui , Han Yuemei , Tang Junmei , Chen Hao
Published: September 2023

Expression of concern for ‘Synthesis of MA POSS–PMMA as an intraocular lens material with high light transmittance and good cytocompatibility’ by Bailiang Wang et al., RSC Adv., 2014, 4, 52959–52966, https://doi.org/10.1039/C4RA08060B.
Improvement of DERA activity and stability in the synthesis of statin precursors by immobilization on magnetic nanoparticles
Authors: Skendrović Dino , Švarc Anera , Rezić Tonči , Chernev Andrey , Rađenović Aleksandra , Vrsalović Presečki Ana
Published: September 2023

Higher stability and hyperactivation of the DERA enzyme were achieved by covalent bonding to magnetic nanoparticles with succinic anhydride as an activating agent.
Multifrequency Analysis of Masseter Vestibular Evoked Myogenic Potentials in Young Adults
Authors: Arkadi Mugdha , Neupane Anuj Kumar
Published: September 2023

Purpose:

The purpose of this study was to explore the dynamics of multifrequency tone bursts on the masseter vestibular evoked myogenic potential (mVEMP) parameters. Furthermore, it sought to determine the optimal frequency tuning of mVEMP responses.

Method:

Twenty young adults with normal hearing sensitivity participated in the study. Bilateral tone burst evoked mVEMPs were obtained using the zygomatic montage at 250-, 500-, 750-, 1000-, 1500-, and 2000-Hz stimulation frequencies. Self-monitoring biofeedback was given during the procedure to confirm the tension of the masseter muscle between 49.9 and 150.6 rms. Furthermore, the electromyography (EMG) scaling was done to avoid any muscle-related irregularities.

Results:

Tone burst evoked mVEMPs were found to be 100% present at the stimulation frequencies of 250, 500, 750, and 1000 Hz. There were no ear and gender effects seen for any of the frequencies. Significant shortening of the P1 and N1 latencies with increasing stimulation frequencies was observed. The peak-to-peak amplitude was the highest at 500 Hz and lowest at 2000 Hz tone bursts under both EMG scaled and unscaled conditions.

Conclusion:

The present revealed higher response rates and larger amplitudes study of mVEMP at lower frequencies, and, therefore, the frequency tuning was seen for the stimulation frequency at 500 Hz.
The Introduction of a Protocol for Esophageal Screening in Videofluoroscopic Swallowing Studies: Exploring Clinical Impacts and Barriers
Authors: McCarthy Kellie , Finch Emma , Miles Anna
Published: September 2023

Purpose:

Esophageal screening is a valuable inclusion in videofluoroscopic swallowing studies (VFSSs). However, routine standardized esophageal screening does not always occur in clinical practice. This study introduced and evaluated an esophageal screening protocol at one Australian hospital.

Method:

Radiology, gastroenterology, and speech-language pathology endorsed an esophageal screening protocol, which followed a timed 20-ml International Dysphagia Diet Standardisation Initiative Level 0 bolus from mouth to stomach in an upright anterior–posterior position. Measures exploring clinical impacts and barriers were recorded. Participants were compared with 100 consecutive VFSS patients prior to the introduction of the esophageal screening protocol.

Results:

During the esophageal screening protocol trial, 163 VFSSs were conducted with recruited patients. Aspiration risk (29%,
n
= 47/163) and positioning limitation (3%,
n
= 5/163) were barriers to esophageal screening. Rates of esophageal screening significantly increased with the esophageal screening protocol (χ
2
= 63.462,
p
< .001). There was no difference in radiation dose for patients who had esophageal screening and those who did not in the esophageal screening protocol group (
U
= 1689.000,
p
= .237). The VFSS team breached the esophageal screening protocol for some patients, when evaluating esophageal transit time (
n
= 28) and recommending gastroenterology referral (
n
= 6). There was no difference between groups for rates of gastroenterology consults (χ
2
= 1.805,
p
= .188) or dysphagia procedures (χ
2
= 1.951,
p
= .209).

Conclusions:

This study confirms that routine esophageal screening provides additional clinical information to assist holistic dysphagia management without adverse operational impacts. Further research with the multidisciplinary dysphagia team has commenced to continue to optimize and refine esophageal screening practice.
What Works in Collaboration? Identifying Key Ingredients to Improve Service Delivery in Schools
Authors: DeLuca Tim , Komesidou Rouzana , Pelletier Richard , Hogan Tiffany
Published: September 2023

Purpose:

This survey study examined factors that may influence interprofessional collaboration in schools to support children with oral and written language impairments, namely, knowledge, collaborative beliefs and practices, and resources.

Method:

A survey was conducted across 319 school-based professionals, in a partnering public school district, to examine these constructs within the context of each individual participant's professional role.

Results:

Between-groups comparisons were made between special educators, general educators, paraprofessionals, and indirect educators (i.e., those whose roles do not explicitly include language-based instruction). Special educators had significantly higher levels of learning experiences and knowledge about language disorders compared to other groups. Those who engaged in the most independent learning (i.e., learning outside of pre- or in-service learning) exhibited the highest levels of knowledge. Collaborative beliefs among professionals were best predicted by access to resources and overall professional learning experiences. More positive collaborative beliefs, in turn, predicted higher rates of collaborative behaviors. Resources were predicted by a small negative relationship with years of experience and by working in specific school buildings within the district. Those with less experience in specific buildings reported more resources.

Conclusion:

Individuals with higher levels of individual learning and positive attitudes toward collaboration may enhance the interprofessional collaborative practices of teams supporting children with language disorders.

Supplemental Material:

https://doi.org/10.23641/asha.24059178
Diagnosis of subarray‐structured base station antennas in a compact setup based on solving linear equations
Authors: Li Mengting , Zhang Fengchun , Fan Wei
Published: September 2023

Since the total number of the antenna elements can be up to hundreds in a massive multiple‐input multiple‐output (MIMO) system, subarray‐structured base station (BS) array configurations are widely adopted to achieve a good cell coverage and to reduce the required number of radio frequency chains at the same time. It is crucial for any BS product to ensure that the antenna elements perform correctly as expected. Therefore, the necessity of array diagnosis is evident, especially for large BS arrays. Furthermore, it is essential that the diagnosis can be achieved in a compact and cost‐effective setup with high measurement efficiency (i.e. only a few measurement samples are required). The principle of the diagnosis method presented in this article is to obtain the S‐parameters between the subarrays and the probe via solving linear equations. In the simulation, a BS array composed of 16 subarrays with each containing 3 elements is used to validate the diagnosis method at 3.5 GHz. An array composed of 4 subarrays with each containing 3 elements was used in the measurements to verify the diagnosis method with two different phase tuning matrices at 3 GHz. Successful diagnosis results have been achieved in both the simulations and the measurements.
On preinvex interval-valued functions and unconstrained interval-valued optimization problems
Authors: Shi Fangfang , Ye Guoju , Liu Wei , Zhao Dafang
Published: September 2023

The main objective of this paper is to investigate the generalized convexity of interval-valued functions under the total order relation and apply it to a class of unconstrained interval-valued optimization problems. For this purpose, we present the new definition of preinvex interval-valued functions and obtain its several fascinating characterizations. Then, we introduce the ⪯cw-semicontinuity and discuss its relationship with preinvex interval-valued functions. As applications related to preinvex interval-valued functions, we study a class of unconstrained interval-valued optimization problems and discuss the existence theorem of its optimal solution.
Polynomial time algorithms for the token swapping problem on cographs
Authors: Tonetti Caio Henrique Segawa , dos Santos Vinicius Fernandes , Urrutia Sebastián
Published: September 2023

The reconfiguration framework models the concept of transformation of combinatorial objects under a variety of operations and constraints. When it comes to reconfiguration challenges, the questions of importance are connectivity, diameter and distance, which can be considered and restrained in many ways. This work focuses on the Token Swap problem, a reconfiguration problem with variations that even precede the systematic study of the reconfiguration framework. In this problem, the goal is to convert an initial token placement on the vertices of a graph into a target token placement with the minimum number of swap operations. The main result of this paper is the construction of a polynomial algorithm for threshold graphs and subsequently cographs.
‘Turn-Over’ Flap for Pressure Sores
Authors: Patil D. L.
Published: September 2023

This paper describes the use of deepithelialized ‘Turn-over’ flaps to cover pressure sores in paraplegic patients. Four patients have been treated successfully using this technique. The possible advantages of this flap are mentioned.
Craniofacial Morphology in Unoperated Cleft Lip and Palate
Authors: Deshpande Sanjeev N. , Sharma L. K.
Published: September 2023

Cleft lip and palate patients have normal growth potential. Inadvertent surgery done in early childhood results in maxillary hypoplasia, which manifests in later life. Unoperated cleft lip and palate patients have normal craniofacial morphology when compared to controls of same age and sex, irrespective of the type of cleft. Lateral cephalometric analysis of craniofacial morphology in 22 cases of cleft lip and palate has been studied whose results are being presented.
Pierre Robin Syndrome with Osteoarthropathy
Authors: Singh V. S. , Dubey A. S. , Dubey A.
Published: September 2023

A case of Pierre Robin syndrome with osteoarthropathy affecting the superior and the inferior extremity and the spinal column is being presented.
Orthodontic Management Of Cleft Palate Patient—A Case Report
Authors: Tandon Pradeep , Tandon Ragni
Published: September 2023

The details of the Orthodontic management of cleft lip and palate patients as practiced in our department is being presented here.
Forging ahead for fault-tolerant quantum computing
Authors: Ikenson Ben
Published: September 2023

Qubit active reset method showcases speed and efficiency.
Polarization and properties of low-frequency waves in warm magnetized two-fluid plasma
Authors: Choi Cheong R. , Woo M.-H. , Ryu Kwangsun , Lee D.-Y. , Yoon P. H.
Published: September 2023

This paper presents the derivation of a general wave dispersion relation for warm magnetized plasma under the two-fluid formalism. The discussion is quite general except for the assumption of low frequency and slow phase speed, for which the displacement current is negligible, under the implicit assumption that the plasma is sufficiently dense to satisfy the condition ωpe>ωce, where ωpe and ωce denote the plasma oscillation frequency and electron gyro frequency, respectively. The present discussion does not invoke charge neutrality associated with the fluctuations although it is implicitly satisfied. The resulting dispersion relation that includes the fluid thermal effects shows that there are three eigen modes, which include those corresponding to ideal MHD, namely, fast, slow, and kinetic Alfvén waves, as well as higher-frequency modes including the ion and electron cyclotron and lower-hybrid resonances. The fluid effects in the ideal MHD wave branches are influenced by the finite Larmor radius scales, and when the wave number in the cross field direction is comparable to these values, the fluid effects become significant. It is found that the Larmor radius should be interpreted in the sense as ion-acoustic gyro-radius instead of ion thermal gyro radius only. That is, it is found that the electrons also contribute to the non-ideal effect associated with the kinetic Alfvén wave. A comprehensive explanation of the polarization of each mode is also presented. The present findings indicate that the polarity may change its sign only for the kinetic Alfvén mode branch and that such a transition is based on the propagation angle. When such a change does take place, it is found that the kinetic Alfvén wave transits to an ion-acoustic mode. For each branch, it is also found that the electric field along the ambient magnetic field is purely transverse.
Rheological behavior of polyvinylidene fluoride/dimethylacetamide solutions: Experimental investigation and machine learning modeling
Authors: Kikhavani T. , Tavakolmoghadam M. , Hosseini S. H. , Moradkhani M. A.
Published: September 2023

This study aimed to investigate the rheological properties of polyvinylidene fluoride/dimethylacetamide solutions. The influences of shear rate, temperature, and additives fractions on solution viscosity were experimentally studied. The results indicated that the viscosity is noticeably reduced by increasing the temperature at low shear rates, while the temperature dependence of viscosity was diminished at high levels of shear rate. On the other hand, adding water to the solution tended the viscosity to increase, especially at lower shear rates and temperatures. Furthermore, an exponential enhancement was observed in the viscosity by growing the inorganic/organic additive ratio. The measured data were employed to design predictive methods for solution viscosity by defining six factors including temperature, shear rate, and the fractions of solvent and additives as input variables. The modeling phase was carried out by implementing three computer-aided approaches, among which the radial basis functions (RBF) method overcame the others from the standpoint of accuracy and reliability with total average absolute relative errors and R2 values of 1.29% and 99.86%, respectively, for 1064 measured data. Also, a visual description through the contour diagram affirmed that the RBF model performs excellently in the suit of describing the rheological behavior of the polymeric solution under various operating conditions. Eventually, the factors with the greatest influences on solution viscosity were designated through a sensitivity analysis based on the recently proposed model.
Importance of spectrally invariant broadband attenuation of light in indoor photovoltaic characterization
Authors: Zeiske Stefan , Meredith Paul , Armin Ardalan , Burwell Gregory
Published: September 2023

Indoor photovoltaic (IPV) devices are poised to make a significant contribution to the proliferation of the “Internet of Things” (IoT). For the accurate intercomparison of IPVs (and, hence, to advance the rational development of the technology), lighting conditions representative of those in typical indoor settings must be created reproducibly. As indoor lighting is invariably broadband, this will typically require the use of optical attenuation to achieve varying irradiance conditions at the device under test location. However, most forms of optical attenuation will suffer from some degree of spectral dispersion, creating sources of uncertainty for key figures of merit, such as power conversion efficiency. In this work, we examine the contribution of the mode of optical attenuation to the accurate characterization of IPV systems. We discuss requirements for broadband light source attenuation for the accurate characterization of photovoltaic devices under indoor illumination and consider the importance of using suitable reference devices for light intensity calibration. Furthermore, we experimentally verify attenuation methods typically used, including power control of the light source itself, use of neutral density filters, and advanced attenuation based on tandem prism attenuators. Finally, spectral shape alteration-induced uncertainties in performance parameter determination of photovoltaic cells under indoor illumination are quantified for three common broadband light attenuation methods, where we found ∼2%, ∼6%, and up to ∼15% ambiguity in photovoltaic device efficiency when using LED power control, prism attenuators, and neutral density filter-based broadband light attenuation, respectively.
Interaction mechanism between incoming vortex and tip leakage vortex breakdown of a compressor cascade
Authors: Cao Zhiyuan , Gao Xi , Yang Jing , Wang Chuxuan , Liu Bo
Published: September 2023

Tip leakage vortex breakdown (TVB) is an important flow character that affects the performance of axial compressors. In this study, the interaction mechanism between incoming vortex (IV) and TVB is investigated to improve the performance of compressor cascade. First, the pitchwise location effect, swirling direction effect, and intensity effect are investigated under steady condition; then, an unsteady investigation is conducted based on the steady results. Under steady condition, TVB can be completely removed by the incoming vortex near the suction surface with different swirling directions, and the normalized circulation at the edge of incoming vortex is 0.7. The loss coefficient caused by TVB is also reduced; however, a new loss is induced by IV. The flow mechanism is that the interaction between the incoming vortex and tip leakage vortex (TLV) can increase the chordwise momentum at the vortex core and the stability of the TLV. For TLV and IV, the two vortices have a tendency to combine downstream of the compressor cascade if they have the same swirling directions. However, when the swirling directions are different, TLV and IV propagate separately, and the intensity and stability of TLV are much higher. The loss of TLV is higher for the anticlockwise IV scheme because the intensity of the TLV is greater due to the interaction between TLV and IV. By utilizing the incoming vortex under unsteady condition, the TVB can also be reduced. The unsteadiness of the compressor cascade with the incoming vortex is significantly reduced by reducing the TVB.
Beyond the Maxwell Garnett approximation for interacting plasmonic nanoparticles: An analytical and numerical study
Authors: Maurice M. S. , Barros N. , Kachkachi H.
Published: September 2023

We revisit the issue of building a precise mixing formula for the effective permittivity of interacting assemblies of plasmonic nanoparticles. More precisely, we reconsider the analytical expressions rendered by the Maxwell Garnett and Torquato et al. approximation formulas and compare them to each other and to a numerical approach based on the boundary element method applied to interacting assemblies of metallic (gold or silver) nanoparticles. For efficient numerical simulations of interacting assemblies of relatively large sizes, we set up an algorithm with adaptive surface meshing that depends on the particle’s position within the assembly. Next, we derive expressions for the resonance frequency of the assembly from the analytical formulas, which are valid for gold and silver particle assemblies embedded in matrices with large optical indices. We then compare the analytical results with our numerical findings. We find that the Maxwell Garnett approximation formula underestimates the resonance wavelength and that its validity range in terms of inclusion fraction strongly depends on the nature of the metal and the embedding matrix. In the case of silver particles embedded in high-permittivity matrices, the Maxwell Garnett formula should only be used for low particle concentrations. Torquato’s formula, on the other hand, which accounts for multipolar interactions and the assembly spatial arrangement, renders a better agreement with the numerical simulations.
Study on prediction of sustained casing pressure in tubing-casing annulus based on bubble migration experiment
Authors: Ding Liangliang , Chen Wenkang , Han Chuanjun , Li Shuai , Zhang Qiang
Published: September 2023

Sustained casing pressure (SCP) due to tubing leakage is an unwanted condition for well barrier reliability and gas well management and can affect well integrity. Therefore, studying the SCP prediction in the tubing-casing annulus to reduce the potential risk in the wellbore is critical. Almost all available research neglects the effect of the migration of the gas in the annulus on the SCP. In this research, a prediction model of the SCP is developed by integrating the gas migration. Meanwhile, a device is being experimentally developed according to the similarity principle. Based on the simulation experiments, the gas migration characteristics are investigated, and the accuracy of the prediction model of the gas migration is verified. Then, a numerical model is established for the SCP to further evaluate the validity of the SCP prediction model and the effect of the gas migration on the SCP. Finally, a case study is conducted on a high-pressure gas well of the SCP to investigate the effects of the condition parameters of the well on the SCP and the gas migration. The obtained results indicate that the position of the tubing leakage and the liquid density in the annulus has an impact on the balance value and recovery rate of the SCP. The gas migration has no effect on the balance value of the SCP, but it does alter the initial recovery rate of the SCP. The work presented provides a reliable prediction method for the accurate description of the SCP process.
Interface and oxide trap states of SiO2/GaN metal–oxide–semiconductor capacitors and their effects on electrical properties evaluated by deep level transient spectroscopy
Authors: Ogawa Shingo , Mizobata Hidetoshi , Kobayashi Takuma , Shimura Takayoshi , Watanabe Heiji
Published: September 2023

The relationship between the electrical properties and the carrier trap properties of the SiO2/GaN metal–oxide–semiconductor (MOS) capacitors was investigated using electrical measurements and deep level transient spectroscopy (DLTS). The capacitance–voltage (C–V) measurement showed that the frequency dispersion of the C–V curves became smaller after an 800 °C annealing in O2 ambient. DLTS revealed that before the annealing, the interface trap states, in a broad energy range above the midgap of GaN, were detected with the higher interface state density at around 0.3 and 0.9 eV below the conduction band minimum (EC) of GaN. Moreover, the oxide trap states were formed at around 0.1 eV below the EC of GaN, plausibly indicating a slow electron trap with a tunneling process. Although both trap states affect the electrical reliability and insulating property of the SiO2/GaN MOS capacitors, they were found to drastically decrease after the annealing, leading to the improvement of the electrical properties.
Stability analyses of secondary instability and oblique breakdown in a supersonic boundary layer under the influence of pressure gradients
Authors: Lu Yuhan , Liu Zaijie
Published: September 2023

Studied here is how pressure gradients affect nonlinear transition processes in a supersonic flat-plate boundary layer. Linear stability analysis suggests that a favorable pressure gradient stabilizes the first-mode disturbances significantly, whereas an adverse pressure gradient destabilizes them. Nonlinear stability analysis indicates that the three nonlinear mechanisms of fundamental resonance, subharmonic resonance, and oblique breakdown can induce transition. Oblique breakdown causes the earliest transition, and subharmonic resonance is stronger than fundamental resonance. An adverse pressure gradient significantly destabilizes the primary modes and enhances the nonlinear transition mechanisms. However, a favorable pressure gradient affects the different nonlinear transition processes differently. A weak favorable pressure gradient completely suppresses the transition in fundamental resonance but just delays it slightly in subharmonic resonance. For oblique breakdown, a weak favorable pressure gradient delays the transition significantly, with two high-speed streaks observed clearly. In all cases, a strong favorable pressure gradient leads to a fully laminar flow.