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https://www.readbyqxmd.com/read/29609301/new-on-orbit-geometric-interior-parameters-self-calibration-approach-based-on-three-view-stereoscopic-images-from-high-resolution-multi-tdi-ccd-optical-satellites
#1
Yufeng Cheng, Mi Wang, Shuying Jin, Luxiao He, Yuan Tian
To increase the field of view (FOV), combining multiple time-delayed and integrated charge-coupled devices (TDI-CCD) into the camera and the pushbroom imaging modality are traditionally used with high-resolution optical satellites. It is becoming increasingly labor- and cost-intensive to build and maintain a calibration field with high resolution and broad coverage. This paper introduces a simple and feasible on-orbit geometric self-calibration approach for high-resolution multi-TDI-CCD optical satellites based on three-view stereoscopic images...
March 19, 2018: Optics Express
https://www.readbyqxmd.com/read/29593827/preparation-and-applications-of-guard-cell-protoplasts-from-the-leaf-epidermis-of-solanum-lycopersicum
#2
Xuehui Yao, Wenchao Zhao, Rui Yang, Jianli Wang, Fukuan Zhao, Shaohui Wang
Background: Guard cell protoplasts (GCPs) isolated from various plants have proven to be especially useful for studies of signal transduction pathways and plant development. But it is not easy to isolate highly purified preparations of large numbers of GCPs from plants. In this research, our focus is on a method to isolate large numbers of guard cells from tomato leaves. The protocols described yield millions of highly purified, viable GCPs, which are also suitable for studies on guard cell physiology...
2018: Plant Methods
https://www.readbyqxmd.com/read/29538458/tis21-gene-therapy-inhibits-medulloblastoma-growth-in-a-murine-allograft-model
#3
Dario Presutti, Manuela Ceccarelli, Laura Micheli, Giuliana Papoff, Simonetta Santini, Simone Samperna, Cristiana Lalli, Lorena Zentilin, Giovina Ruberti, Felice Tirone
Medulloblastoma (MB), the tumor of the cerebellum, is the most frequent brain cancer in childhood and a major cause of pediatric mortality. Based on gene profiling, four MB subgroups have been identified, i.e., Wnt or Sonic Hedgehog (Shh) types, and subgroup 3 or 4. The Shh-type MB has been shown to arise from the cerebellar precursors of granule neurons (GCPs), where a hyperactivation of the Shh pathway leads to their neoplastic transformation. We have previously shown that the gene Tis21 (PC3/Btg2) inhibits the proliferation and promotes the differentiation and migration of GCPs...
2018: PloS One
https://www.readbyqxmd.com/read/29531057/lateral-cerebellum-is-preferentially-sensitive-to-high-sonic-hedgehog-signaling-and-medulloblastoma-formation
#4
I-Li Tan, Alexandre Wojcinski, Harikrishna Rallapalli, Zhimin Lao, Reeti M Sanghrajka, Daniel Stephen, Eugenia Volkova, Andrey Korshunov, Marc Remke, Michael D Taylor, Daniel H Turnbull, Alexandra L Joyner
The main cell of origin of the Sonic hedgehog (SHH) subgroup of medulloblastoma (MB) is granule cell precursors (GCPs), a SHH-dependent transient amplifying population in the developing cerebellum. SHH-MBs can be further subdivided based on molecular and clinical parameters, as well as location because SHH-MBs occur preferentially in the lateral cerebellum (hemispheres). Our analysis of adult patient data suggests that tumors with Smoothened ( SMO ) mutations form more specifically in the hemispheres than those with Patched 1 ( PTCH1 ) mutations...
March 12, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29506641/comparing-australian-gay-and-bisexual-men-with-undiagnosed-and-recently-diagnosed-hiv-infection-to-those-in-the-national-hiv-registry
#5
Ian Down, Garrett Prestage, Graham Brown, Jeanne Ellard, Rebecca Guy, Margaret Hellard, David Wilson, John de Wit, Mark Stoové, Martin Holt
Background: Gay and bisexual men (GBM) with recent HIV infection are a key population to inform HIV-prevention. The National HIV Registry (NHR) provides details about all individuals diagnosed with HIV, but it is unclear how. Methods: Basic sociodemographic characteristics of GBM in the NHR who were diagnosed between 2010 and 2014 were compared with three samples of GBM: men with undiagnosed HIV infection from the Community-Based Study of Undiagnosed HIV and Testing (COUNT) study of HIV prevalence and undiagnosed infection that was conducted during 2013-14; men in the Australian Gay Community Periodic Surveys (GCPS) who were diagnosed with HIV between 2010 and 2014; and men in the HIV Seroconversion Study (SCS) who were also diagnosed in those years...
March 6, 2018: Sexual Health
https://www.readbyqxmd.com/read/29499229/%C3%AE-tubulin-has-a-conserved-intrinsic-property-of-self-polymerization-into-double-stranded-filaments-and-fibrillar-networks
#6
Jana Chumová, Lucie Trögelová, Hana Kourová, Jindřich Volc, Vadym Sulimenko, Petr Halada, Ondřej Kučera, Oldřich Benada, Anna Kuchařová, Anastasiya Klebanovych, Pavel Dráber, Geoffrey Daniel, Pavla Binarová
γ-Tubulin is essential for microtubule nucleation and also plays less understood roles in nuclear and cell-cycle-related functions. High abundancy of γ-tubulin in acentrosomal Arabidopsis cells facilitated purification and biochemical characterization of large molecular species of γ-tubulin. TEM, fluorescence, and atomic force microscopy of purified high molecular γ-tubulin forms revealed the presence of linear filaments with a double protofilament substructure, filament bundles and aggregates. Filament formation from highly purified γ-tubulin free of γ-tubulin complex proteins (GCPs) was demonstrated for both plant and human γ-tubulin...
February 27, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29457522/a-high-prevalence-of-tmd-is-related-to-somatic-awareness-and-pain-intensity-among-healthy-dental-students
#7
Anna Lövgren, Catharina Österlund, Aurelija Ilgunas, Ewa Lampa, Fredrik Hellström
OBJECTIVE: Dental students have been identified as a group with high risks of developing both temporomandibular disorders (TMD) and psychosocial conditions. Our primary aim was to evaluate the cross-sectional prevalence of TMD diagnoses, as defined in the Diagnostic Criteria (DC)/TMD, among dental students. The secondary aim was to evaluate the prevalence and association of behavioural and psychosocial factors in relation to DC/TMD diagnoses. MATERIALS AND METHODS: The study was conducted among undergraduate dental students during the second semester of their third year at the Department of Odontology, Medical Faculty, Umeå University, Sweden...
February 18, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29368652/novel-gli3-variant-causing-overlapped-greig-cephalopolysyndactyly-syndrome-gcps-and-pallister-hall-syndrome-phs-phenotype-with-agenesis-of-gallbladder-and-pancreas
#8
Saki Ito, Riko Kitazawa, Ryuma Haraguchi, Takeshi Kondo, Ayaka Ouchi, Yasuo Ueda, Sohei Kitazawa
BACKGROUND: A proper balance between the activator and the repressor form of GLI3, a zinc-finger transcription factor downstream of hedgehog signaling, is essential for proper development of various organs during development. Mutations in different domains of the GLI3 gene underlie several congenital diseases including Greig cephalopolysyndactyly syndrome (GCPS) and Pallister-Hall syndrome (PHS). CASE PRESENTATION: Here, we describe the case of an overlapped phenotype of these syndromes with agenesis of the gallbladder and the pancreas, bearing a c...
January 3, 2018: Diagnostic Pathology
https://www.readbyqxmd.com/read/29337885/research-on-geometric-calibration-of-spaceborne-linear-array-whiskbroom-camera
#9
Qinghong Sheng, Qi Wang, Hui Xiao, Qing Wang
The geometric calibration of a spaceborne thermal-infrared camera with a high spatial resolution and wide coverage can set benchmarks for providing an accurate geographical coordinate for the retrieval of land surface temperature. The practice of using linear array whiskbroom Charge-Coupled Device (CCD) arrays to image the Earth can help get thermal-infrared images of a large breadth with high spatial resolutions. Focusing on the whiskbroom characteristics of equal time intervals and unequal angles, the present study proposes a spaceborne linear-array-scanning imaging geometric model, whilst calibrating temporal system parameters and whiskbroom angle parameters...
January 16, 2018: Sensors
https://www.readbyqxmd.com/read/29317485/meis1-coordinates-cerebellar-granule-cell-development-by-regulating-pax6-transcription-bmp-signaling-and-atoh1-degradation
#10
Tomoo Owa, Shinichiro Taya, Satoshi Miyashita, Mariko Yamashita, Toma Adachi, Koyo Yamada, Miwa Yokoyama, Shogo Aida, Tomoki Nishioka, Yukiko U Inoue, Ryo Goitsuka, Takuro Nakamura, Takayoshi Inoue, Kozo Kaibuchi, Mikio Hoshino
Cerebellar granule cell precursors (GCPs) and granule cells (GCs) represent good models to study neuronal development. Here, we report that the transcription factor myeloid ectopic viral integration site 1 homolog (Meis1) plays pivotal roles in the regulation of mouse GC development. We found that Meis1 is expressed in GC lineage cells and astrocytes in the cerebellum during development. Targeted disruption of the Meis1 gene specifically in the GC lineage resulted in smaller cerebella with disorganized lobules...
January 31, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29225022/the-mitotic-function-of-augmin-is-dependent-on-its-microtubule-associated-protein-subunit-ede1-in-arabidopsis-thaliana
#11
Yuh-Ru Julie Lee, Yuji Hiwatashi, Takashi Hotta, Tingting Xie, John H Doonan, Bo Liu
The augmin complex plays an essential role in microtubule (MT)-dependent MT nucleation by recruiting the γ-tubulin complex to MT walls to generate new MTs [1]. The complex contains eight subunits (designated AUG) including AUG8, which is an MT-associated protein (MAP). When this complex is isolated from etiolated seedlings consisting of primarily interphase cells in Arabidopsis thaliana, AUG8 is an integral component [2]. EDE1 (Endosperm DEfective 1) is homologous to AUG8 [3]. Here, we demonstrate that EDE1, but not AUG8, is associated with acentrosomal spindle and phragmoplast MT arrays in patterns indistinguishable from those of the AUG1-7 subunits and the γ-tubulin complex proteins (GCPs) that exhibit biased localization toward MT minus ends...
December 18, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29079783/nanog-driven-cell-reprogramming-and-self-renewal-maintenance-in-ptch1-granule-cell-precursors-after-radiation-injury
#12
Barbara Tanno, Simona Leonardi, Gabriele Babini, Paola Giardullo, Ilaria De Stefano, Emanuela Pasquali, Anna Saran, Mariateresa Mancuso
Medulloblastoma (MB) is the most common pediatric brain tumor, comprising four distinct molecular variants, one of which characterized by activation of the Sonic Hedgehog (SHH) pathway, driving 25-30% of sporadic MB. SHH-dependent MBs arise from granule cell precursors (GCPs), are fatal in 40-70% of cases and radioresistance strongly contributes to poor prognosis and tumor recurrence. Patched1 heterozygous (Ptch1+/- ) mice, carrying a germ-line heterozygous inactivating mutation in the Ptch1 gene, the Shh receptor and negative regulator of the pathway, are uniquely susceptible to MB development after radiation damage in neonatal cerebellum...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29079345/postoperative-respiratory-effects-of-intravenous-fentanyl-compared-to-intravenous-methadone-in-dogs-following-spinal-surgery
#13
Maria Amengual, Hannah Leigh, Eva Rioja
OBJECTIVE: To evaluate the 24-hour postoperative respiratory effects of either intravenous fentanyl administered as a constant rate infusion or boluses of methadone, in dogs following spinal surgery, assessed by serial arterial blood gas analyses. STUDY DESIGN: Prospective, randomized clinical study. ANIMALS: Thirty-two healthy dogs (American Society of Anesthesiologists I/II) anaesthetized for elective caudal thoracic and/or lumbar decompression spinal surgery...
September 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29019477/comparing-axis-ii-scores-according-to-the-rdc-tmd-and-dc-tmd-in-israeli-patients
#14
Shoshana Reiter, Ilana Eli, Pessia Friedman-Rubin, Alona Emodi-Perlman, Tomer Ziv-Baran, Ephraim Winocur
AIMS: To use the Symptom Checklist-90-Revised (SCL-90-R)-based instruments of the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) and the Primary Care Evaluation of Mental Disorders (PRIME-MD)-based instruments of the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD) in order to compare these Axis II scores in temporomandibular disorder (TMD) patients. METHODS: Demographic and socioeconomic data, Axis I diagnoses, and Axis II evaluations (depression, nonspecific physical symptoms, anxiety, and Graded Chronic Pain Scale [GCPS]) were compared between two groups of patients-142 TMD patients diagnosed according to the RDC/TMD (RDC group) and 157 TMD patients diagnosed according to the DC/TMD (DC group)...
2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/28974424/lkb1-regulates-granule-cell-migration-and-cortical-folding-of-the-cerebellar-cortex
#15
Kaitlyn E Ryan, Patrick S Kim, Jonathan T Fleming, Emily Brignola, Frances Y Cheng, Ying Litingtung, Chin Chiang
Cerebellar growth and foliation require the Hedgehog-driven proliferation of granule cell precursors (GCPs) in the external granule layer (EGL). However, that increased or extended GCP proliferation generally does not elicit ectopic folds suggests that additional determinants control cortical expansion and foliation during cerebellar development. Here, we find that genetic loss of the serine-threonine kinase Liver Kinase B1 (Lkb1) in GCPs increased cerebellar cortical size and foliation independent of changes in proliferation or Hedgehog signaling...
December 1, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28910763/feature-augmentation-for-learning-confidence-measure-in-stereo-matching
#16
Sunok Kim, Dongbo Min, Seungryong Kim, Kwanghoon Sohn
Confidence estimation is essential for refining stereo matching results through a post-processing step. This problem has recently been studied using a learning-based approach, which demonstrates a substantial improvement on conventional simple non-learning based methods. However, the formulation of learning-based methods that individually estimates the confidence of each pixel disregards spatial coherency that might exist in the confidence map, thus providing a limited performance under challenging conditions...
September 8, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28862658/multi-mode-gf-3-satellite-image-geometric-accuracy-verification-using-the-rpc-model
#17
Taoyang Wang, Guo Zhang, Lei Yu, Ruishan Zhao, Mingjun Deng, Kai Xu
The GaoFen-3 (GF-3) satellite is the first C-band multi-polarization synthetic aperture radar (SAR) imaging satellite with a resolution up to 1 m in China. It is also the only SAR satellite of the High-Resolution Earth Observation System designed for civilian use. There are 12 different imaging models to meet the needs of different industry users. However, to use SAR satellite images for related applications, they must possess high geometric accuracy. In order to verify the geometric accuracy achieved by the different modes of GF-3 images, we analyze the SAR geometric error source and perform geometric correction tests based on the RPC model with and without ground control points (GCPs) for five imaging modes...
September 1, 2017: Sensors
https://www.readbyqxmd.com/read/28844293/the-effect-of-maropitant-on-intraoperative-isoflurane-requirements-and-postoperative-nausea-and-vomiting-in-dogs-a-randomized-clinical-trial
#18
Adam Swallow, Eva Rioja, Tim Elmer, Alex Dugdale
OBJECTIVE: To establish if preoperative maropitant significantly reduced intraoperative isoflurane requirements and reduced clinical signs associated with postoperative nausea and vomiting (PONV) in dogs. STUDY DESIGN: Randomized clinical trial. ANIMALS: Twenty-four healthy, client-owned dogs undergoing routine ovariohysterectomy. METHODS: Premedication involved acepromazine (0.03 mg kg(-1)) combined with methadone (0...
April 12, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28828310/role-of-accreditation-in-quality-improvement-of-institutional-review-board
#19
Abhidnya Vasant Desai, Rohini W Hawaldar, Jigeeshu V Divatia
AIM: The aim of this study was to evaluate the process of accreditation resulting in improvement of the Institutional Review Board (IRB) functioning. METHODOLOGY: Randomly selected projects from years 2007 (before accreditation), 2010 (after accreditation), and 2013 (after reaccreditation) were evaluated to assess parameters, namely, submission of good clinical practices (GCPs), completeness of IRB submission form, fulfillment of quorum, documentation of the declaration of conflict of interests, and submission of the status reports...
July 2017: Perspectives in Clinical Research
https://www.readbyqxmd.com/read/28771185/accuracy-analysis-of-a-dam-model-from-drone-surveys
#20
Elena Ridolfi, Giulia Buffi, Sara Venturi, Piergiorgio Manciola
This paper investigates the accuracy of models obtained by drone surveys. To this end, this work analyzes how the placement of ground control points (GCPs) used to georeference the dense point cloud of a dam affects the resulting three-dimensional (3D) model. Images of a double arch masonry dam upstream face are acquired from drone survey and used to build the 3D model of the dam for vulnerability analysis purposes. However, there still remained the issue of understanding the real impact of a correct GCPs location choice to properly georeference the images and thus, the model...
August 3, 2017: Sensors
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