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https://www.readbyqxmd.com/read/29218352/an-ultra-low-frictional-interface-combining-fdts-sams-with-molybdenum-disulfide
#1
Xing'an Cao, Xuehui Gan, Yitian Peng, Yongxia Wang, Xingzhong Zeng, Haojie Lang, Jinan Deng, Kun Zou
Interfacial friction is of crucial importance to ensure the friction-reducing and anti-wear properties of mechanical microstructures in micro/nanoelectromechanical systems (MEMS/NEMS). An ultra-low frictional interface combining hydrophobic 1H,1H,2H,2H-perfluorodecyltrichlorosilane (FDTS) self-assembled monolayers (SAMs) coated on an AFM tip with mechanically exfoliated molybdenum disulfide (MoS2) nanosheets deposited on a planar Si/SiO2 substrate was achieved. The FDTS SAMs/MoS2 interface between the FDTS SAMs and the MoS2 nanosheets exhibits an ultra-low friction force that is independent of the relative humidity...
December 8, 2017: Nanoscale
https://www.readbyqxmd.com/read/29217080/mems-gyroscope-control-using-a-novel-compound-robust-control
#2
Mehran Rahmani
This paper proposes a new compound fractional order integral terminal sliding mode control (FOITSMC) and proportional-derivative control (PD-FOITSMC) for the control of a MEMS gyroscope. In order to improve the robustness of the conventional integral terminal sliding mode control (ITSMC), a fractional integral terminal sliding mode surface is applied. The chattering problem in FOITSMC, which is usually generated by the excitation of fast un-modelled dynamic is the main drawback. A PD controller is employed in order to eliminate chattering phenomenon...
December 4, 2017: ISA Transactions
https://www.readbyqxmd.com/read/29216329/characterization-of-fusobacterium-varium-fv113-g1-isolated-from-a-patient-with-ulcerative-colitis-based-on-complete-genome-sequence-and-transcriptome-analysis
#3
Tsuyoshi Sekizuka, Yumiko Ogasawara, Toshifumi Ohkusa, Makoto Kuroda
Fusobacterium spp. present in the oral and gut flora is carcinogenic and is associated with the risk of pancreatic and colorectal cancers. Fusobacterium spp. is also implicated in a broad spectrum of human pathologies, including Crohn's disease and ulcerative colitis (UC). Here we report the complete genome sequence of Fusobacterium varium Fv113-g1 (genome size, 3.96 Mb) isolated from a patient with UC. Comparative genome analyses totally suggested that Fv113-g1 is basically assigned as F. varium, in particular, it could be reclassified as notable F...
2017: PloS One
https://www.readbyqxmd.com/read/29215699/lncrna-linc00880-promotes-cell-proliferation-migration-and-invasion-while-inhibiting-apoptosis-by-targeting-cacng5-through-the-mapk-signaling-pathway-in-spinal-cord-ependymoma
#4
Dong-Mei Wu, Yong-Jian Wang, Xin-Rui Han, Xin Wen, Shan Wang, Min Shen, Shao-Hua Fan, Juan Zhuang, Zi-Feng Zhang, Qun Shan, Meng-Qiu Li, Bin Hu, Chun-Hui Sun, Jun Lu, Yuan-Lin Zheng
The present study was to investigate the effect of lncRNA LINC00880 targeting CACNG5 on cell proliferation, migration, invasion and apoptosis in spinal cord ependymoma (SCE) through the MAPK signaling pathway. GEO database was used to download gene expression data related with SCE (GSE50161 and GSE66354) and annotation file. LncRNA with differential expression was predicted by Multi Experiment Matrix website (MEM). The target gene was analyzed by KEGG pathway enrichment analysis. SCE tissues and adjacent tissues were collected...
December 7, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29215564/piezoelectric-potential-in-single-crystalline-zno-nanohelices-based-on-finite-element-analysis
#5
Huimin Hao, Kory Jenkins, Xiaowen Huang, Yiqian Xu, Jiahai Huang, Rusen Yang
Electric potential produced in deformed piezoelectric nanostructures is of significance for both fundamental study and practical applications. To reveal the piezoelectric property of ZnO nanohelices, the piezoelectric potential in single-crystal nanohelices was simulated by finite element method calculations. For a nanohelix with a length of 1200 nm, a mean coil radius of 150 nm, five active coils, and a hexagonal coiled wire with a side length 100 nm, a compressing force of 100 nN results in a potential of 1...
December 7, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29201139/structural-properties-of-starch-chitosan-gelatin-foams-and-the-impact-of-gelatin-on-mc3t3-mouse-osteoblast-cell-viability
#6
Gregory E Risser, Brittany L Banik, Justin L Brown, Jeffrey M Catchmark
Background: This study examines the effects of adding gelatin to a starch-chitosan composite foam, focusing on the altered structural and biological properties. The compressive modulus of foams containing different gelatin concentrations was tested in dry, wet, and lyophilized states. MC3T3 mouse osteoblast cells were used to test the composite's ability to support cell growth. The stability of the foams in α-MEM culture media with and without cells was also examined. Results: It was found that for dry foams, the compressive modulus increased with increasing gelatin content...
2017: Journal of Biological Engineering
https://www.readbyqxmd.com/read/29200843/eosinophilic-and-non-eosinophilic-copd-patients-with-chronic-respiratory-failure-neutrophil-to-lymphocyte-ratio-as-an-exacerbation-marker
#7
Eylem Acartürk Tunçay, Zuhal Karakurt, Emine Aksoy, Cuneyt Saltürk, Sinem Gungor, Nezihe Ciftaslan, İlim Irmak, Dilek Yavuz, Birsen Ocakli, Nalan Adıgüzel
Aim: Increased dyspnea, sputum volume, and purulence are subjective symptoms in COPD patients. To diagnose COPD exacerbations with chronic respiratory failure (CRF) and to assess the requirement for antibiotic treatment, physicians require more objective criteria. We aimed to investigate whether neutrophil-to-lymphocyte ratio (NLR) can be used as an infectious exacerbation marker in COPD patients with CRF. Patients and methods: This retrospective cross-sectional study was performed in the intensive care outpatient clinic of a tertiary training hospital between 2014 and 2015...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29198878/medication-adherence-among-patients-with-gout-a-systematic-review-and-meta-analysis
#8
REVIEW
Lieke E J M Scheepers, Marloes van Onna, Coen D A Stehouwer, Jasvinder A Singh, Ilja C W Arts, Annelies Boonen
OBJECTIVE: In the management of chronic gout, a large proportion of patients need long-term management with urate lowering therapy (ULT). This study reviews medication adherence to ULT and summarizes factors associated with adherence. METHODS: We performed a systematic literature search for studies on adherence to ULT among gout patients in PubMed, Embase, CINAHL, and PsycINFO. We conducted meta-analysis, with a random effect model, for the studies reporting the proportion of patients considered adherent to at least 80% of prescribed medication or time taken...
October 7, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/29174035/effects-of-standard-ethanolic-extract-from-erythrina-velutina-in-acute-cerebral-ischemia-in-mice
#9
Francisca Taciana Rodrigues de Sousa, Caren Nádia Soares de Sousa, Naiara Coelho Ximenes, Anália Barbosa Almeida, Lucas Moraes Cabral, Cláudio Felipe Vasconcelos Patrocínio, Aline Holanda Silva, Luzia Kalyne Almeida Moreira Leal, José Eduardo Ribeiro Honório Júnior, Danielle Macedo, Silvânia Maria Mendes Vasconcelos
The objective of this study was to verify a possible neuroprotective effect of the ethanolic extract of Erythrina velutina (EEEV). Male Swiss mice were submitted to transient cerebral ischemia by occlusion of both carotid arteries for 30 min and treated for 5 days with EEEV (200 or 400 mg/kg) or Memantine (MEM) 10 mg/kg, with initiation of treatment 2 or 24 h after Ischemia. On the 6th day after the induction of ischemia, the animals were submitted to evaluation of locomotor activity and memory and then sacrificed...
November 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29172714/heroes-or-health-victims-exploring-how-the-elite-media-frames-veterans-on-veterans-day
#10
Kayla B Rhidenour, Ashley K Barrett, Kate G Blackburn
We examine the frames the elite news media uses to portray veterans on and surrounding Veterans Day 2012, 2013, 2014, and 2015. We use mental health illness and media framing literature to explore how, why, and to what extent Veterans Day news coverage uses different media frames across the four consecutive years. We compiled a Media Coverage Corpora for each year, which contains the quotes and paraphrased remarks used in all veterans news stories for that year. In our primary study, we applied the meaning extraction method (MEM) to extract emergent media frames for Veterans Day 2014 and compiled a word frequency list, which captures the words most commonly used within the corpora...
November 27, 2017: Health Communication
https://www.readbyqxmd.com/read/29170730/improving-low-cost-inertial-measurement-unit-imu-based-motion-tracking-accuracy-for-a-biomorphic-hyper-redundant-snake-robot
#11
Weixin Yang, Alexandr Bajenov, Yantao Shen
This paper develops and experimentally validates a 3D-printed snake robot prototype. Its structure is designed to allocate limited room for each functional module (including an external power module, battery power module, the wireless control and transmission module and some detective sensors), so as to ensure the snake robot works in different environments. In order to control and track the snake robot, a low-cost MEMS-IMU (micro-electro-mechanical systems inertial measurement unit)-based snake robot motion tracking system is developed...
2017: Robotics and Biomimetics
https://www.readbyqxmd.com/read/29165377/a-novel-3d-pedestrian-navigation-method-for-a-multiple-sensors-based-foot-mounted-inertial-system
#12
Wei Yang, Chundi Xiu, Jianmin Zhang, Dongkai Yang
In this paper, we present a novel method for 3D pedestrian navigation of foot-mounted inertial systems by integrating a MEMS-IMU, barometer, and permanent magnet. Zero-velocity update (ZUPT) is a well-known algorithm to eliminate the accumulated error of foot-mounted inertial systems. However, the ZUPT stance phase detector using acceleration and angular rate is threshold-based, which may cause incorrect stance phase estimation in the running gait pattern. A permanent magnet-based ZUPT detector is introduced to solve this problem...
November 22, 2017: Sensors
https://www.readbyqxmd.com/read/29164848/static-capacitive-pressure-sensing-using-a-single-graphene-drum
#13
Dejan Davidovikj, Paul H Scheepers, Herre S J van der Zant, Peter Gerard Steeneken
To realize nanomechanical graphene-based pressure sensors, it is beneficial to have a method to electrically readout the static displacement of a suspended graphene membrane. Capacitive readout, typical in micro-electro-mechanical systems (MEMS), gets increasingly challenging as one starts shrinking the dimensions of these devices, since the expected responsivity of such devices is below 0.1 aF/Pa. To overcome the challenges of detecting small capacitance changes, we design an electrical readout device fabricated on top of an insulating quartz substrate, maximizing the contribution of the suspended membrane to the total capacitance of the device...
November 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29164737/reproducibility-of-eeg-meg-fusion-source-analysis-of-interictal-spikes-relevance-in-presurgical-evaluation-of-epilepsy
#14
Rasheda Arman Chowdhury, Giovanni Pellegrino, Ümit Aydin, Jean-Marc Lina, François Dubeau, Eliane Kobayashi, Christophe Grova
Fusion of electroencephalography (EEG) and magnetoencephalography (MEG) data using maximum entropy on the mean method (MEM-fusion) takes advantage of the complementarities between EEG and MEG to improve localization accuracy. Simulation studies demonstrated MEM-fusion to be robust especially in noisy conditions such as single spike source localizations (SSSL). Our objective was to assess the reliability of SSSL using MEM-fusion on clinical data. We proposed to cluster SSSL results to find the most reliable and consistent source map from the reconstructed sources, the so-called consensus map...
November 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29160394/effect-of-milk-renewal-on-cell-viability-in-vitro-at-different-time-frames
#15
Beatriz Dulcineia Mendes de Souza, Ana Maria Hecke Alves, Dayane Machado Ribeiro, Luciane Geanini Pena Dos Santos, Claudia Maria de Oliveira Simões, Wilson Tadeu Felippe, Mara Cristina Santos Felippe
The purpose of this study was to evaluate if the renewal of milk as a storage medium, every 12, 24 and 48 h, is able to increase its ability to maintain human periodontal ligament fibroblasts (PDLF) viability over time. PDLF were soaked in Minimum Essential Medium at 37 °C (MEM-37) (positive control), tap water (Water) (negative control) and in skimmed milk (44 wells) at 5 °C and 20 °C. The skimmed milk was renewed every 12 h (Milk-12), 24 h (Milk-24) and 48 h (Milk-48) in 11 wells of each plate, and the milk in the remaining 11 wells of each plate was maintained in situ (not renewed milk) (NRM)...
July 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29158272/combination-antibiotic-exposure-selectively-alters-the-development-of-vancomycin-intermediate-resistance-in-staphylococcus-aureus
#16
Xuting Zheng, Andrew D Berti, Sue McCrone, Melanie Roch, Adriana E Rosato, Warren E Rose, Baiyi Chen
Invasive methicillin-resistant Staphylococcus aureus (MRSA) treated with vancomycin (VAN) is associated with reduced VAN susceptibility and treatment failure. VAN combination therapy is one strategy to improve response, but comprehensive assessments of combinations to prevent resistance are limited. This study identifies optimal combinations to prevent the emergence of VAN-intermediate Staphylococcus aureus (VISA). Two standard MRSA and two heterogeneous VISA (hVISA) strains were exposed for 28 days in vitro to VAN alone, VAN with cefazolin (CFZ), fosfomycin (FOF), gentamicin (GEN), meropenem (MEM), rifampin (RIF), piperacillin-tazobactam (TZP) or trimethoprim-sulfamethoxazole (SXT)...
November 20, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29156560/system-modeling-of-a-mems-vibratory-gyroscope-and-integration-to-circuit-simulation
#17
Hyukjin J Kwon, Seyeong Seok, Geunbae Lim
Recently, consumer applications have dramatically created the demand for low-cost and compact gyroscopes. Therefore, on the basis of microelectromechanical systems (MEMS) technology, many gyroscopes have been developed and successfully commercialized. A MEMS gyroscope consists of a MEMS device and an electrical circuit for self-oscillation and angular-rate detection. Since the MEMS device and circuit are interactively related, the entire system should be analyzed together to design or test the gyroscope. In this study, a MEMS vibratory gyroscope is analyzed based on the system dynamic modeling; thus, it can be mathematically expressed and integrated into a circuit simulator...
November 18, 2017: Sensors
https://www.readbyqxmd.com/read/29156214/corrigendum-to-dynamics-of-eeg-functional-connectivity-during-statistical-learning-neurobiol-learn-mem-144-2017-216-229
#18
Brigitta Tóth, Karolina Janacsek, Ádám Takács, Andrea Kóbor, Zsófia Zavecz, Dezso Nemeth
No abstract text is available yet for this article.
November 17, 2017: Neurobiology of Learning and Memory
https://www.readbyqxmd.com/read/29154484/memantine-loaded-pegylated-biodegradable-nanoparticles-for-the-treatment-of-glaucoma
#19
Elena Sánchez-López, Maria Antonia Egea, Benjamin Michael Davis, Li Guo, Marta Espina, Amelia Maria Silva, Ana Cristina Calpena, Eliana Maria Barbosa Souto, Nivedita Ravindran, Miren Ettcheto, Antonio Camins, Maria Luisa García, Maria Francesca Cordeiro
Glaucoma is a multifactorial neurodegenerative disease associated with retinal ganglion cells (RGC) loss. Increasing reports of similarities in glaucoma and other neurodegenerative conditions have led to speculation that therapies for brain neurodegenerative disorders may also have potential as glaucoma therapies. Memantine is an N-methyl-d-aspartate (NMDA) antagonist approved for Alzheimer's disease treatment. Glutamate-induced excitotoxicity is implicated in glaucoma and NMDA receptor antagonism is advocated as a potential strategy for RGC preservation...
November 20, 2017: Small
https://www.readbyqxmd.com/read/29149050/combining-a-disturbance-observer-with-triple-loop-control-based-on-mems-accelerometers-for-line-of-sight-stabilization
#20
Yong Luo, Yongmei Huang, Chao Deng, Yao Mao, Wei Ren, Qiongyan Wu
In the CCD-based fine tracking optical system (FTOS), the whole disturbance suppression ability (DSA) is the product of the inner loop and outer position loop. Traditionally, high sampling fiber-optic gyroscopes (FOGs) are added to the platform to stabilize the line-of-sight (LOS). However, because of the FOGs' high cost and relatively big volume relative to the back narrow space of small rotating mirrors, we attempt in this work to utilize a cheaper and smaller micro-electro-mechanical system (MEMS) accelerometer to build the inner loop, replacing the FOG...
November 17, 2017: Sensors
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