bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamic instability response of smart composite material
Authors: Roslan S.A.H. , Yusof Z. , Rasid Z.A. , Yahaya M.H. , Hassan M.Z. , Mahmud J. 
Published: March 2019

AbstractLaminated composite is common to replace traditional metals in today's industries due to its high specific strength. Shape memory alloy has been used to improve structural behaviours such as buckling, vibration and fatigue through its well‐ known property of shape memory effect. This ability of shape memory alloy to improve the parametric instability behaviour of laminated composite plate has not been studied in the past and as such, this study is conducted. Here, shape memory alloy wires are embedded within the outer layers of the laminated composite plates. The Mathieu‐Hill equation for the parametric instability of the shape memory alloy composite plate has been developed using finite element method based on the first order shear deformation theory. The formulation is validated and parametric studies have been conducted to investigate the effect of shape memory alloy on the dynamic instability behaviour of the composite that corresponds to factors such as static load factor, thickness of the plate and boundary conditions. The study shows that shape memory alloy improves significantly the dynamic instability behaviour of the laminated composite plate by shifting the instability chart to the right. The effect of shape memory alloy can increase the frequency centre of the instability chart by more than 100 %.
Influence of powder loading on densification and microstructure of injection molded Fe‐50Ni soft magnetic alloys
Authors: Ali M. , Ahmad F. , Melor P.S. , Yasir M. , Yahya N. , Aslam M. , Malik M.R.R. 
Published: March 2019

AbstractMetal injection molding (MIM) is a well‐known technique capable to produce micro size electromagnetic components with intricate shape features. Powder loading is a crucial parameter in the metal injection molding process which controls the densification and microstructure of the sintered parts. The lower powder loading leads to various defects and lower densification whereas higher loading results in failure of parts during injection molding. Therefore, it is important to engineer an appropriate powder loading to achieve defect‐free parts along with higher densification and improved microstructure. In this contest, three feedstocks of Fe‐50Ni alloys are prepared with powder loadings of 52 vol.%, 54 vol.% and 57 vol.% and injection molded. After debinding, the parts are sintered at 1325 °C for 2 h. The main objective of this study is to investigate the effect of powder loading on injection molding, densification, and microstructure. In addition, scanning electron microscopy and x‐ray diffraction analysis are performed during the study. The defect‐free green parts are produced successfully from the 52 % and 54 % loading. It has been found that the optimal powder loading of 54 % is the best from the perspective of enhanced densification and improved microstructure to assure the quality parts of Fe‐50Ni alloys via metal injection molding.
Force‐deflection behaviour of NiTi archwires in a polytetrafluoroethylene (Teflon) bracket system
Authors: Ahmad M.N. , Mahmud A.S. , Razali M.F. , Mokhtar N. 
Published: March 2019

AbstractIn orthodontic treatment, archwire forces for tooth movement is influenced by the magnitude of friction encountered during the sliding motion of archwire along the bracket slot. Friction will reduce the archwire force, and subsequently modify the constant force delivery trend into a slope. The aim of this work is to investigate the force‐deflection behaviour of nickel‐titanium (NiTi) shape memory alloy archwire on polytetrafluoroethylene (Teflon) as the bracket. Sliding tests was performed to determine the coefficient of friction of polytetrafluoroethylene‐NiTi material combinations. The force‐deflection behaviour was evaluated from a modified bending tests, at two different configurations; commercial stainless‐steel bracket and hand‐made polytetrafluoroethylene bracket. During test, wires were deflected into different deflections (2 mm, 3 mm and 4 mm) by using four commercial NiTi archwires at different sizes and geometry. From the test; coefficient of friction for polytetrafluoroethylene‐NiTi wire was recorded as small as 0.07. On force‐deflection graphs, bending load on 3 mm and 4 mm deflection were observed higher on stainless steel (SS) bracket compared with polytetrafluoroethylene bracket. Due to small coefficient of friction on polytetrafluoroethylene‐NiTi configuration, the NiTi archwire exhibited the activation and deactivation force within the plateau limit. Greater friction on stainless steel‐nickel‐titanium bracket configuration causes wire to release force in a slope trend. This finding highlights the potential of polytetrafluoroethylene as a material in the bracket slot to minimize friction during orthodontic treatment.
Effect of amorphous silica by rice husk ash on physical properties and microstructures of recycled aluminium chip AA7075
Authors: Mohd Joharudin N.F. , Abdul Latif N. , Mustapa M.S. , Mansor M.N. , Siswanto W.A. , Murugesan J. , Yusof F. 
Published: March 2019

AbstractHigh strength to weight ratio of aluminium reinforced as metal matrix composites is a well known material used in automotive application. The effects of recycled aluminium chips AA7075 with amorphous silica by rice husk ash on the physical properties and microstructure were investigated. Recycled aluminium chip AA7075 was reinforced with agro waste of amorphous silica rice husk ash i. e., 2.5 %, 5 %, 7.5 %, 10 % and 12.5 %. Samples of these metal matrix composites were prepared by cold compaction method due to the lower energies consumption and operating cost compared to conventional recycling by casting. Physical testing of density, apparent porosity, water absorption and hardness tests of the metal matrix composites samples were examined in the current study. The density of metal matrix composites was increased up to 5 % of amorphous silica, and then decreased with increasing mass fraction of amorphous silica. Porosity and water absorption of metal matrix composites were significantly consistent at increasing mass fraction of amorphous silica, while the hardness of metal matrix composites was increased at increasing amorphous silica. Consequently, the microstructures of metal matrix composites were observed via optical microscope to analyze the dispersion of the reinforced composites. The microstructures of metal matrix composites were found non‐homogeneous and random distribution of amorphous silica and aluminium chip AA7075 compared to 100 % recycled aluminium chip AA7075. Based on investigation to aluminium reinforced rice husk ash composites, it has good potential to improve the material behavior of metal matrix composites by appropriate composition amorphous silica to composite.
Pallidal thermolesion unleashes gamma oscillations in the motor cortex in Parkinson's disease
Authors: de Hemptinne Coralie , Wang Doris D. , Miocinovic Svjetlana , Chen Witney , Ostrem Jill L. , Starr Philip A. 
Published: March 2019

AbstractBackgroundIn Parkinson's disease, the emergence of motor dysfunction is thought to be related to an imbalance between “antikinetic” and “prokinetic” patterns of oscillatory activity in the motor network. Invasive recordings from the basal ganglia and cortex in surgical patients have suggested that levodopa and therapeutic deep brain stimulation can suppress antikinetic beta band (13‐30 Hz) rhythms while promoting prokinetic gamma band (60‐90 Hz) rhythms. Surgical ablation of the globus pallidus internus is one of the oldest effective therapies for Parkinson's disease and produces remarkably immediate relief of rigidity and bradykinesia, but its effects on oscillatory activity in the motor network have not been studied.ObjectivesWe characterize the effects of pallidotomy on cortical oscillatory activity in Parkinson's patients.MethodsUsing a temporary 6‐contact lead placed over the sensorimotor cortex in the subdural space, we recorded acute changes in cortical oscillatory activities in 3 Parkinson's disease patients undergoing pallidotomy and compared the results to that of 3 essential tremor patients undergoing thalamotomy.ResultsIn all 3 Parkinson's disease patients, we observed the emergence of a ~70‐80 Hz narrowband oscillation with effective thermolesion of the pallidum. This gamma oscillatory activity was spatially localized over the primary motor cortex, was minimally affected by voluntary movements, and was not found in the motor cortex of essential tremor patients undergoing thalamotomy.ConclusionsOur finding suggests that acute lesioning of the pallidum promotes cortical gamma band oscillations. This may represent an important mechanism for alleviating bradykinesia in Parkinson's disease. © 2019 International Parkinson and Movement Disorder Society
Preparation and study magnetic properties of the spinal ferrite Mg1 − XZnXFe2O4
Authors: Kadhim Kadhim J. , Mezher Sabah J. , Yasin Nabil J. , Ismael Zeyad T. 
Published: March 2019

AbstractThe ceramic techniques were used to prepare spinal ferrite (Mg‐Zn) to evaluate and investigate the microwaves absorption at X‐band and Ku‐band with formula (Mg1 − X Zn
X Fe2O4) at x = (0.0, 0.1, 0.3, 0.4, 0.5, 0.6) where x is percentage of zinc in the ferrite. The dimension of samples was used according to the cavity of Network Analyzer System which were 22.6 × 10 × 10 mm to the X‐band cavity, then refine them to 15.5 × 10 × 10 mm within in the Ku‐band. The resonance peaks appeared at the frequencies 9, 10, 11, 14, 15, 16, and 17 GHz. It was found that the effect of increase sintering temperature increases the values of attenuation and absorbance with best result in behavior of absorbance for the sample Mg0.6Zn0.4Fe2O4 at the range of X‐band. X‐ray diffraction results showed that the structure was polycrystalline.
Outcome and complications of adjustable continence therapy (ProACTTM) in the treatment of urinary incontinence after transurethral resection of the prostate: A multicenter study
Authors: Noordhoff Toscane C. , Finazzi‐Agrò Enrico , Scheepe Jeroen R. , Blok Bertil F. M. 
Published: March 2019

AbstractAimTo evaluate the outcome of adjustable continence balloons in the treatment of stress urinary incontinence (SUI) after transurethral resection of the prostate (TURP).MethodsIn two tertiary centers, adjustable continence balloons were implanted in 29 patients with post‐TURP SUI between 2007 and 2018. Endpoints of this retrospective multicenter study were patient‐reported changes in pad count and complications. Dry was defined as no pad or one security pad.ResultsPreoperative urinary incontinence was mild in 7 (24%), moderate in 12 (41%), and severe in 10 (35%) patients. The median follow‐up duration was 21 (interquartile range [IQR], 11‐43) months. Within 30 days postoperatively, a Clavien‐Dindo grade less than or equal to II complication occurred in 24% of the patients. Reintervention rate was 24%. Six and 12 months after implantation, the International Prostate Symptom Score (IPSS) quality‐of‐life item improved significantly from 5 (IQR, 5‐6) preoperatively to 3 (IQR, 1‐4.5) and 1 (IQR, 0‐3), respectively. At last visit (median 21 months after implantation), the outcome on continence had improved in 76% of the patients, including, 45% dry patients. After a median follow‐up of 28 months (IQR, 13‐63; N = 23), all but one patient reported improvement on the Patient Global Impression of Improvement (PGI‐I) scale. In detail, 10 patients reported “very much better” condition compared with before the implantation, 10 patients “much better,” two patients “a little better,” and one patient “no change.” Daily pad use decreased from three (IQR, 2‐5) to one (IQR, 0‐2) pads/day (P < 0.001).ConclusionsThis is hitherto, the first study reporting results of adjustable continence balloons in the treatment of post‐TURP SUI. The therapy was found to be safe and efficient. The majority of our study population reported improvement on their condition and greater than or equal to 50% reduction in daily pad use.
Vaginal axis after abdominal sacrocolpopexy versus vaginal sacrospinous fixation—a randomized trial
Authors: Juliato Cassia Raquel Teatin , Santos‐Junior Luiz Carlos , de Castro Edilson Benedito , Dertkigil Sergio Sanjuan , Brito Luiz Gustavo Oliveira 
Published: March 2019

AbstractAimsTo compare postoperative vaginal axis (VA) following vaginal sacrospinous fixation (VSF) or abdominal sacrocolpopexy (ASC) using magnetic resonance imaging (MRI) at postoperative period, in a randomized sample.MethodsSeventy‐one patients randomized to VSF with an anterior mesh or ASC were recruited with a mean 27‐month follow‐up for pelvic MRI; 40 patients underwent the examination. VA was calculated in relation to the pelvic inclination correction line. All patients were submitted to physical examination according to the pelvic organ prolapse quantification system, subjective impression questionnaires and quality of life (QoL) questionnaires (International Consultation on Incontinence Questionnaire, ICIQ). Objective failure was defined as points Ba, Bp, or C > 0. Subjective cure was defined as questions 5a and 6a from the ICIQ‐VS questionnaire equal to zero.ResultsVA exhibited two portions (inferior and medium). Mean medium axis was equally more obtuse in VSF (85.9° ± 9.9°; P < 0.001) and ASC (87.1° ± 14.7°; P < 0.001) groups, with no difference between them. Mean inferior axis was more acute for both groups (VSF, 72.5° ± 19.1°, P < 0.001; ASC, 75.7° ± 15.5°, P < 0.001). All women had normal medium axes and 47.5% had inferior axis values above the 95th or below the fifth percentile, without differences regarding type of surgery performed. Women with abnormal vs normal VA did not present any difference regarding pre or postoperative physical examination, demographic characteristics, objective or subjective cure, patient satisfaction, QoL scores, or sexuality.ConclusionsBoth VSF and ASC deviate the physiological VA, both in its medium and inferior portions, where values fall outside normality percentiles. However, this alteration was not associated with worse objective, subjective, QoL, or sexual outcomes.
Diagnostic accuracy of neuroimaging in pediatric optic chiasm/sellar/suprasellar tumors
Authors: Norris Gregory A. , Garcia Jacquelyn , Hankinson Todd C. , Handler Michael , Foreman Nicholas , Mirsky David , Stence Nicholas , Dorris Kathleen , Green Adam L. 
Published: March 2019

AbstractPreoperative diagnosis for tumors arising in the optic chiasm/sellar/suprasellar region in children is helpful to determine surgical necessity and approach, given the high operative risk in this area. We evaluated the ability to differentiate tumor type by preoperative neuroimaging. Thirty‐eight of 53 tumors were correctly diagnosed by neuroimaging based on final pathologic diagnosis (prediction accuracy 72%). Prediction accuracies were 87% (20/23) for craniopharyngioma, 79% (11/14) for optic pathway glioma, 64% (7/11) for germ cell tumor, and 0% (0/5) for Langerhans cell histiocytosis. Diagnosis of optic chiasm/sellar/suprasellar tumors in children by imaging alone should be considered when biopsy is considered high risk.
Cover Image, Volume 75, Issue 3
Authors: Borowski Zbigniew , Bałazy Radomir , Ciesielski Mariusz , Korzeniewski Krzysztof 
Published: March 2019

The front cover image is based on the Research Article Does winter supplementary feeding affect deer damage in a forest ecosystem? A field test in areas with different levels of deer pressure by Zbigniew Borowski et al., DOI: 10.1002/ps.5131. Image Credit: Karol Zub.
image
Trial analysis of drug profiling by liquid chromatography/mass spectrometry and inductively coupled plasma mass spectrometry to establish the origin of ephedrines used as precursors for illicit production of methamphetamine
Authors: Makino Yukiko , Urano Yasuteru , Kaneko Kiyoko 
Published: March 2019

RationaleWe investigated whether chemical information on the origin of ephedrine and pseudoephedrine (ephedrines) can be acquired by liquid chromatography/mass spectrometry (LC/MS) as a substitute method for stable isotope ratio mass spectrometry (IRMS), which is not routinely available in forensic laboratories. We examined the characteristic inorganic elemental contaminants of ephedrines as a preliminary study.MethodsThe stable isotope ratios measured by IRMS analysis are expressed relative to the stable isotope ratios of conventional standards. Referring to the method using validated standard samples in IRMS, we selected a standard sample for acquiring stable isotopic ratio by LC/MS. The abundance ratio of the [M + 2H]+ ion to the [M + H]+ ion was measured by means of selected ion monitoring. We carried out qualitative analysis of inorganic elements contained in ephedrines produced by different manufacturing methods with ICPMS.ResultsWe found that the ratio of stable isotope ion to molecular ion (stable isotope ratio) of ephedrines could be measured with LC/MS. The stable isotope ratio of ephedrines determined by LC/MS were confirmed to show relatively good correlations with the carbon and hydrogen stable isotope ratios found by IR‐MS. We identified strontium as a characteristic inorganic element contained in ephedrines prepared by the semisynthetic method from molasses, or in the biosynthetic method from ephedra plants.ConclusionsOur results suggest that useful chemical information can be obtained by LC/MS, which is easy to carry out, and is generally available in forensic laboratories. It would be worthwhile to investigate the usefulness of stable isotope ratio measurements of Sr in the future.
Multimodal obstacle detection in unstructured environments with conditional random fields
Authors: Kragh Mikkel , Underwood James 
Published: March 2019

AbstractReliable obstacle detection and classification in rough and unstructured terrain such as agricultural fields or orchards remains a challenging problem. These environments involve large variations in both geometry and appearance, challenging perception systems that rely on only a single sensor modality. Geometrically, tall grass, fallen leaves, or terrain roughness can mistakenly be perceived as nontraversable or might even obscure actual obstacles. Likewise, traversable grass or dirt roads and obstacles such as trees and bushes might be visually ambiguous. In this paper, we combine appearance‐ and geometry‐based detection methods by probabilistically fusing lidar and camera sensing with semantic segmentation using a conditional random field. We apply a state‐of‐the‐art multimodal fusion algorithm from the scene analysis domain and adjust it for obstacle detection in agriculture with moving ground vehicles. This involves explicitly handling sparse point cloud data and exploiting both spatial, temporal, and multimodal links between corresponding 2D and 3D regions. The proposed method was evaluated on a diverse data set, comprising a dairy paddock and different orchards gathered with a perception research robot in Australia. Results showed that for a two‐class classification problem (ground and nonground), only the camera leveraged from information provided by the other modality with an increase in the mean classification score of 0.5%. However, as more classes were introduced (ground,
sky,
vegetation, and
object), both modalities complemented each other with improvements of 1.4% in 2D and 7.9% in 3D. Finally, introducing temporal links between successive frames resulted in improvements of 0.2% in 2D and 1.5% in 3D.
hMod: A software framework for assembling highly detailed heuristics algorithms
Authors: Urra Enrique , Cubillos Claudio , Cabrera‐Paniagua Daniel , Mellado Rafael 
Published: March 2019

SummarySoftware design and component reuse for heuristic algorithms have gained in relevance; however, further innovation is needed. In this context, hMod is presented as a software framework suited for implementing heuristic algorithms, with a focus on intensive reuse of highly cohesive operator and data components within algorithmic structures, making it possible to dynamically (re)configure and manage such a structure. Rather than a fast‐prototyping tool, hMod supports heuristic implementation in the long term, whereby complexity can escalate from simple operators to major hyperheuristic architectures. In its core resides a novel object‐oriented representation of algorithms through a pattern‐like implementation, namely, algorithm assembling (AA). Additionally, it incorporates component integration features, such as dependency injection mechanisms. hMod has been mentioned in previous research, in which hyperheuristic methods were implemented and evaluated from an optimization perspective. In this work, a description of the framework is presented from the software design perspective, including the AA model, its architecture, and a detailed presentation of the main features of the framework. Previous hMod applications have demonstrated that it supports not only the software design requirements of heuristic algorithms but performance standards as well. Available sources of the framework can be found in http://gitlab.com/eurra/hmod.
The relationship between daylight and happiness for women in residential districts of Isfahan, Iran
Authors: Javani Zahra , Madani Ramin , Hojat Isa , Zadeh Rana 
Published: March 2019

AbstractThis study explores the relationship between daylight exposure in urban residential units and the mood/happiness of nonworking female residents (housewives) in Isfahan, Iran. A growing body of evidence points to the physiological and psychological benefits of daylight, yet few studies have focused on the relationship between residential daylight and women's mental health. A cross‐sectional study was conducted using two‐stage random cluster sampling of nonworking female occupants of buildings in four residential districts. Mood/happiness was determined using the Oxford Happiness Inventory and the Fordyce Happiness Inventory. Spearman's rank correlation analysis was used to determine the relationship between the variables. A significant relationship was found between residents’ happiness and the amount of daylight in their residential units (Oxford Inventory, r = 0.68, P < 0.05; Fordyce Inventory, r = 0.53, P < 0.05). The findings suggest that features of physical residential environments, such as daylight, may be linked to the happiness of housewives. Persons belonging to various demographic groups who spend the majority of their time indoors (e.g., housewives, children, elderly individuals, and people with disabilities) are most dependent on architecture and environmental design for their well‐being, and therefore, are most affected by design decisions.