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https://www.readbyqxmd.com/read/29652388/megahertz-resolution-programmable-microwave-shaper
#1
Jilong Li, Yitang Dai, Feifei Yin, Wei Li, Ming Li, Hongwei Chen, Kun Xu
A novel microwave shaper is proposed and demonstrated, of which the microwave spectral transfer function could be fully programmable with high resolution. We achieve this by bandwidth-compressed mapping a programmable optical wave-shaper, which has a lower frequency resolution of tens of gigahertz, to a microwave one with resolution of tens of megahertz. This is based on a novel technology of "bandwidth scaling," which employs bandwidth-stretched electronic-to-optical conversion and bandwidth-compressed optical-to-electronic conversion...
April 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29643581/hypervigilance-to-pain-affects-activities-of-daily-living-an-examination-using-the-japanese-version-of-the-pain-vigilance-awareness-questionnaire
#2
Hayato Shigetoh
[Purpose] Hypervigilance to pain is an important aspect of the fear-avoidance model of pain that may be associated with disability more than other psychological factors examined. The aim of the study was to investigate how hypervigilance to pain influences disability compared with other psychological factors examined. [Subjects and Methods] The subjects of this study were 50 elderly patients with chronic pain (7 men and 43 women, 80.3 ± 7.8 years). To assess the pain level, the Numerical Rating Scale (NRS) was used...
December 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29643522/-three-dimensional-architecture-of-intraosseous-vascular-anatomy-of-the-hamate-a-micro-computed-tomography-study
#3
D Y Wang, X Li, Z C Shen, P L Gu, Y R Pei, G Zeng, H J Leng, W G Zhang
OBJECTIVE: To obtain three-dimensional intraosseous artery of the hamate and to provide the vascular anatomy basis of hamate fracture fixation. METHODS: PbO (lead monoxide, Sinopharm Chemical Reagent Beijing Co. Ltd) was ground into particles less than 40 μm and suspended in turpentine oil (Chemical Reagent Beijing Co. Ltd) at ratios of 1 g : 1.5 mL, 1 g : 1 mL and 1 g : 0.5 mL. Three specimens were investigated. Brachial arteries were cannulated and perfused with lead-based contrast agent...
April 18, 2018: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/29642495/visual-servoing-based-nanorobotic-system-for-automated-electrical-characterization-of-nanotubes-inside-sem
#4
Huiyang Ding, Chaoyang Shi, Li Ma, Zhan Yang, Mingyu Wang, Yaqiong Wang, Tao Chen, Lining Sun, Fukuda Toshio
The maneuvering and electrical characterization of nanotubes inside a scanning electron microscope (SEM) has historically been time-consuming and laborious for operators. Before the development of automated nanomanipulation-enabled techniques for the performance of pick-and-place and characterization of nanoobjects, these functions were still incomplete and largely operated manually. In this paper, a dual-probe nanomanipulation system vision-based feedback was demonstrated to automatically perform 3D nanomanipulation tasks, to investigate the electrical characterization of nanotubes...
April 8, 2018: Sensors
https://www.readbyqxmd.com/read/29629330/an-evaluation-of-shear-bond-strength-of-admira-ormocer-as-an-alternative-material-for-bonding-orthodontic-brackets-an-in-vitro-study
#5
Altaf Hussian Thekiya, K R Aileni, Madhukar Reddy Rachala, Sathun Dharmender Reddy, K Sena Devi, Md Yaser Ahmed Khan
Objective: To evaluate shear bond strength (SBS) of Ormocer-bonded orthodontic brackets with self-etching primer (SEP) and conventional adhesive system and also to assess the amount of adhesive remaining on the tooth surface after debonding using adhesive remnant index (ARI). Materials and Methods: The study was done on 90 extracted human upper first permanent maxillary premolars. The study sample was categorized into three groups of 30 each to assess the SBS using three adhesives, Ormocer, SEP, and conventional adhesive system...
January 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29627208/influence-of-repeated-firings-on-marginal-axial-axio-occlusal-and-occlusal-fit-of-metal-ceramic-restorations-fabricated-with-different-techniques
#6
Özay Önöral, Mutahhar Ulusoy, Emre Seker, İlker Etikan
STATEMENT OF PROBLEM: Ill-fitting restorations can jeopardize dental, periodontal, and systemic health. Repeated ceramic firing may influence the fitting accuracy of restorations, but scientific information regarding this issue is lacking. PURPOSE: The purpose of this in vitro study was to assess and compare the influence of repeated firings on the marginal, axial, axio-occlusal, and occlusal fit of metal-ceramic 3-unit fixed partial dentures (FPDs) manufactured with different framework methods, including casting, fully sintered hard alloy milling (FHAM), presintered soft alloy milling (PSAM), and selective laser sintering (SLS)...
April 5, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29625719/endocytoscopy-for-in-situ-real-time-histology-of-oral-mucosal-lesions
#7
I Miyamoto, N Yada, K Osawa, I Yoshioka
This study investigated the utility of endocytoscopy, a novel emerging endoscopic system, for in situ real-time histology of oral mucosal lesions. Endocytoscopy involves the use of a contact light microscopy system with 380-fold magnification. With the development of endoscopic instruments, it has become possible to observe the abnormal microvascular and capillary patterns of tumour cells. The resolution of the endoscopic image is improved in situ, and a more detailed diagnosis is possible. In this study, endocytoscopy along with other diagnostic modalities was used in nine patients...
April 3, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29624793/electron-microscopic-observations-of-stomata-epicuticular-waxes-and-papillae-in-chamaecyparis-obtusa-reconsidering-the-traditional-concept-of-y-shaped-white-stomatal-bands
#8
Ki Woo Kim
The foliar morphological characters of hinoki (Chamaecyparis obtusa) were revisited using optical and scanning electron microscopy. In C. obtusa, typical Y-shaped white stomatal bands were evident on the abaxial leaf surfaces. Two facial leaves and two lateral leaves were observed at the same node. Waxy papillae and oval stomata were arranged in two or three rows with protuberant rims on the abaxial leaf surfaces. Higher magnifications revealed the deposition of epicuticular waxes (tubules) on the Y-shaped white stomatal bands...
April 6, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29621727/importance-of-accurate-trophic-level-determination-by-nitrogen-isotope-of-amino-acids-for-trophic-magnification-studies-a-review
#9
REVIEW
Eun-Ji Won, Bohyung Choi, Seongjin Hong, Jong Seong Khim, Kyung-Hoon Shin
During the last several decades, persistent organic pollutants and metals cause great concern for their toxicity in organisms as well as for their bioaccumulation and/or trophic transfer through the food chains in ecosystems. A large number of studies therefore have focused on the trophic levels of organisms to illustrate food web structure, as a critical component in the study of pollutant dynamics and biomagnification. The trends in biomagnification of pollutants in food webs indeed provide fundamental information about the properties and fates of pollutants in ecosystems...
April 2, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29609816/detectability-comparison-of-simulated-tumors-in-digital-breast-tomosynthesis-using-high-energy-x-ray-inline-phase-sensitive-and-commercial-imaging-systems
#10
Muhammad U Ghani, Molly D Wong, Farid H Omoumi, Bin Zheng, Laurie L Fajardo, Aimin Yan, Xizeng Wu, Hong Liu
This study compared the detectability of simulated tumors using a high-energy X-ray inline phase sensitive digital breast tomosynthesis (DBT) prototype and a commercial attenuation-based DBT system. Each system imaged a 5-cm thick modular breast phantom with 50-50 adipose-glandular percentage density containing contrast-detail (CD) test objects to simulate different tumor sizes. A commercial DBT system acquired 15 projection views over 15 degrees (15d-15p) was used to acquire the attenuation-based projection views and to reconstruct the conventional DBT slices...
March 2018: Physica Medica: PM
https://www.readbyqxmd.com/read/29608280/trophodynamics-of-emerging-brominated-flame-retardants-in-the-aquatic-food-web-of-lake-taihu-relationship-with-organism-metabolism-across-trophic-levels
#11
Guomao Zheng, Yi Wan, Sainan Shi, Haoqi Zhao, Shixiong Gao, Shiyi Zhang, Lihui An, Zhaobin Zhang
Despite the increasing use and discharge of novel brominated flame retardants, little information is available about their trophodynamics in the aquatic food web, and their subsequent relationships to compound metabolism. In this study, concentrations of 2,4,6-tribromophenyl allyl ether (ATE), 1,2-dibromo-4-(1,2-dibromoethyl)cyclohexane (TBECH), tetrabromo-o-chlorotoluene (TBCT), pentabromobenzyl acrylate (PBBA), 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), bis(2-ethylhexyl)-3,4,5,6-tetrabromo- phthalate (TBPH), and decabromodiphenyl ethane (DBDPE) were measured in 17 species, including plankton, invertebrates, and fish from Lake Taihu, South China...
April 2, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29607866/shear-bond-strength-of-a-novel-porcelain-repair-system-for-different-computer-aided-design-computer-assisted-manufacturing-ceramic-materials
#12
M Karcı, N Demir, M G Subaşı, M Gökkaya
Objectives: The purpose of this study was to compare the shear bond strength of a novel repair system, Nova Compo SF with Ceramic Repair, Ivoclar, to computer-aided design/computer-assisted manufacturing (CAD/CAM) restorative materials (IPS e.max CAD and Empress CAD). Materials and Methods: The specimens of each CAD/CAM restorative material were randomly divided into two subgroups of nine specimens, using one of two repair systems. All specimens were etched with hydrofluoric acid and rinsed under a water spray for 10 s, then air-dried for 10 s...
April 2018: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29607650/factors-associated-with-high-grade-anal-intraepithelial-lesion-in-hiv-positive-men-in-a-southern-u-s-city
#13
Melanie Ann Frank, Cecile Lahiri, Minh Ly Nguyen, C Christina Mehta, Marina Mosunjac, Lisa Flowers
The incidence of anal cancer is increased in HIV-infected patients compared to the general population. Risk factors associated with the anal cancer precursor, high-grade squamous intraepithelial lesion (HSIL), have not been extensively studied in an urban black population with late stage HIV disease. We performed a retrospective chart review of HIV infected men at the Grady Ponce de Leon Center HIV Clinic in Atlanta, Georgia referred for high resolution anoscopy (HRA), a procedure where anal tissue is examined under magnification and abnormal areas are biopsied...
April 1, 2018: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29607458/impact-of-high-magnification-sperm-selection-on-neonatal-outcomes-a-retrospective-study
#14
Olivier Gaspard, Pierre Vanderzwalmen, Barbara Wirleitner, Stéphanie Ravet, Frédéric Wenders, Verena Eichel, Alice Mocková, Dietmar Spitzer, Caroline Jouan, Virginie Gridelet, Henri Martens, Laurie Henry, Herbert Zech, Sophie Perrier d'Hauterive, Michelle Nisolle
PURPOSE: The aim of this study was to compare the effect of the deselection of spermatozoa presenting vacuole-like structures using IMSI (intracytoplasmic morphologically selected sperm injection) with ICSI (intracytoplasmic sperm injection) by means of neonatal outcomes. METHODS: In a retrospective two-center analysis, a total of 848 successful IMSI or ICSI cycles ending with a live birth, induced abortion, or intrauterine fetal death (IUFD) were included. RESULTS: The IMSI and ICSI groups included 332 and 655 babies or fetuses, respectively...
April 2, 2018: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/29605362/can-the-number-of-eosinophils-in-adenoid-and-tonsil-tissue-determine-the-allergy-in-children
#15
Nur Yucel Ekici, Orhan Görgülü, Gül Yucel, Özgür Külahcı, Osman Kürşat Arıkan, Cemile Durmaz
OBJECTIVE: Previous reports have indicated the association of allergy with Waldeyer's ring. The aim of this prospective study was to evaluate the correlation between the allergy and the number of eosinophils in the adenoid and tonsil tissue. METHODS: 101 children who were underwent adenoidectomy and/or tonsillectomy were prospectively enrolled in this study. 46 children who had positive skin-prick test for at least one of the allergen panel were sensitized and 55 children were nonsensitized as a result of skin-prick test...
May 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29604038/holographic-waveguide-heads-up-display-for-longitudinal-image-magnification-and-pupil-expansion
#16
Colton M Bigler, Pierre-Alexandre Blanche, Kalluri Sarma
The field of view of traditional heads-up display systems is limited by the size of the projection optics. Our research is focused on overcoming this limitation by coupling image-bearing light into a waveguide using holographic elements, propagating the light through that waveguide, and extracting the light several times with additional holographic optical elements. With this configuration, we demonstrated both longitudinal magnification and pupil expansion of the heads-up display. We created a ray-trace model of the optical system to optimize the component parameters and implemented the solution in a prototype that demonstrates the merit of our approach...
March 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29604036/multiplanar-imaging-properties-of-theon-sieves
#17
Shouying Xu, Junyong Zhang, Shenlei Zhou, YaYao Ma, Songxian Wang, Yanli Zhang, Jing Xie, Jianqiang Zhu
Greek ladders with diffraction-limited array foci provide a probability to realize array imaging with equal intensity. Here, taking the ancient Theon sequence as an example, we design the optical structure and have measured the focusing properties by digital holography. Then, we verify the multiplanar imaging with different magnifications by experiment. The experimental results agree well with the theoretical analysis. In addition, bi-Fourier planes filtering technology is proposed to solve the problem of crosstalk between different imaging planes to further improve the imaging resolution...
March 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29604023/optical-configuration-with-fixed-transverse-magnification-for-self-interference-incoherent-digital-holography
#18
Masatoshi Imbe
The optical configuration proposed in this paper consists of a 4-f optical setup with the wavefront modulation device on the Fourier plane, such as a concave mirror and a spatial light modulator. The transverse magnification of reconstructed images with the proposed configuration is independent of locations of an object and an image sensor; therefore, reconstructed images of object(s) at different distances can be scaled with a fixed transverse magnification. It is yielded based on Fourier optics and mathematically verified with the optical matrix method...
March 20, 2018: Applied Optics
https://www.readbyqxmd.com/read/29603638/near-visual-acuity-of-dental-hygienists-with-and-without-magnification
#19
M Eichenberger, P Perrin, K R Sieber, A Lussi
OBJECTIVES: The aim of this study was (i) to evaluate the visual performance of dental hygienists in their clinical environment and (ii) to analyse the relationship between self-assessed and objectively measured visual acuity. METHODS: The near visual acuity of 191 dental hygienists and dental hygiene students was self-assessed with a visual analogue scale and objectively measured with miniaturized visual tests in a simulated clinical setting. The visual acuity was also measured with magnification aids if they were part of the individual clinical equipment...
March 30, 2018: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/29603399/validation-study-for-development-of-the-japan-nbi-expert-team-jnet-classification-of-colorectal-lesions
#20
Mineo Iwatate, Yasushi Sano, Shinji Tanaka, Shin-Ei Kudo, Shoichi Saito, Takahisa Matsuda, Yoshiki Wada, Takahiro Fujii, Hiroaki Ikematsu, Toshio Uraoka, Nozomu Kobayashi, Hisashi Nakamura, Kinichi Hotta, Takahiro Horimatsu, Naoto Sakamoto, Kuang-I Fu, Osamu Tsuruta, Hiroshi Kawano, Hiroshi Kashida, Yoji Takeuchi, Hirohisa Machida, Toshihiro Kusaka, Naohisa Yoshida, Ichiro Hirata, Takeshi Terai, Hiro-O Yamano, Takeshi Nakajima, Taku Sakamoto, Yuichiro Yamaguchi, Naoto Tamai, Naoko Nakano, Nana Hayashi, Shiro Oka, Hideki Ishikawa, Yoshitaka Murakami, Shigeaki Yoshida, Yutaka Saito
OBJECTIVE: The Japan NBI Expert Team (JNET) was organized to unify four previous magnifying NBI classifications (the Sano, Hiroshima, Showa, and Jikei classifications). The JNET working group created criteria (referred to as the NBI scale) for evaluation of vessel pattern (VP) and surface pattern (SP). We conducted a multicenter validation study of the NBI scale to develop the JNET classification of colorectal lesions. METHODS: Twenty-five expert JNET colonoscopists read 100 still NBI images with and without magnification on the web to evaluate the NBI findings and the necessity of the criteria for the final diagnosis...
March 30, 2018: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
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