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Lee S.,Republic of Korea Air Force | Mortari D.,Texas A&M University
Computers and Geosciences | Year: 2017

This paper describes a quasi-equal area subdivision algorithm based on equal area spherical subdivision to obtain approximated solutions to the problem of uniform distribution of points on a 2-dimensional sphere, better known as Smale's seventh problem. The algorithm provides quasi-equal area triangles, starting by splitting the Platonic solids into subsequent spherical triangles of identical areas. The main feature of the proposed algorithm is that the final adjacent triangles share common vertices that can be merged. It applies reshaping to the final triangles in order to remove obtuse triangles. The proposed algorithm is fast and efficient to generate a large number of points. Consequently, they are suitable for various applications requiring a large number of distributed points. The proposed algorithm is then applied to two geographical data distributions that are modeled by quasi-uniform distribution of weighted points. © 2017 Elsevier Ltd


LONDON, UK / ACCESSWIRE / May 1, 2017 / Active Wall St. announces its post-earnings coverage on The Boeing Co. (NYSE: BA). The Company posted its first quarter fiscal 2017 results on April 26, 2017. The aerospace Company surpassed earnings expectations and also increased its earnings forecasts for the year. Register with us now for your free membership at: One of The Boeing's competitors within the Aerospace/Defense Products & Services space, Huntington Ingalls Industries, Inc. (NYSE: HII), announced on April 06, 2017, that it will release its Q1 2017 financial results on Thursday, May 04, 2017, and host an earnings conference call at 9 a.m. ET the same day. AWS will be initiating a research report on Huntington Ingalls Industries in the coming days. Today, AWS is promoting its earnings coverage on BA; touching on HII. Get our free coverage by signing up to: For the three months ended March 31, 2017, Boeing reported revenue of $20.98, down compared to revenue of $22.63 billion from the prior year's same period, which was slightly below analysts' consensus of $21.3 billion. For Q1 2017, Boeing reported net income of $1.45 billion, or $2.34 a share, up from $1.22 billion, or $1.83 per share, in Q1 2016. On an adjusted basis, the Company posted earnings of $2.01 per share, ahead of the Wall street's estimates of $1.91 per share. For Q1 2017, Boeing's Commercial Airplanes' revenue was $14.3 billion down 1% on a y-o-y basis, on services growth, offset by lower planned 737 deliveries. The segment's operating margin increased 130 basis points to 8.5%, reflecting improved performance on production and services programs, cost growth on the initial production of KC-46 Tanker aircraft, and less favorable delivery mix. During the reported quarter, Boeing successfully completed first flight of the 787-10 Dreamliner. The 737 program rolled out the first 737 MAX 9 and received FAA certification for the 737 MAX 8. The Company has reported strong demand for the 737 MAX with more than 3,700 orders since launch. Commercial Airplanes booked 198 net orders during Q1 2017. The segment's Backlog remains robust with more than 5,700 airplanes valued at $417 billion. During Q1 2017, Boeing's Defense, Space & Security division's revenue totaled $6.5 billion down 18% on a y-o-y basis. The segment's operating margin increased 100 basis points to 11.3%, reflecting improved performance at Boeing Military Aircraft (BMA). The BMA's reported quarter revenue was $2.6 billion down 28% compared to the year ago comparable period, reflecting lower planned deliveries, and operating margin increased to 12.2% on improved performance. During Q1 2017, BMA was awarded a contract for 268 AH-64E Apache helicopters from the US Army, a contract for 17 P-8A Poseidon aircraft from the US Navy, Royal Australian Air Force, and the U.K. Royal Air Force, and a contract from the US Air Force for an additional 15 KC-46 Tanker aircraft. Boeing's Network & Space Systems' (N&SS) revenue was $1.56 billion for Q1 2017, reflecting lower volume on Commercial Crew. The segment's operating margin was 6.3% driven by lower satellite services volume and investments in development efforts. During the reported quarter, N&SS announced an order for a 702 satellite with a dual payload from SKY Perfect JSAT and Kacific. For Q1 2017, Boeing's Global Services & Support (GS&S) revenue was $2.33 billion, reflecting timing of contracts. The division's operating margin increased to 13.6% largely reflecting improved performance. During the reported quarter, GS&S was awarded a contract from the Republic of Korea Air Force to continue long-term sustainment of F-15 aircraft over the next five years. Backlog at Defense, Space & Security was $63 billion for Q1 2017, of which 34% represents orders from international customers. As of March 31, 2017, Boeing's cash and investments in marketable securities totaled $9.2 billion, down from $10.0 billion at the beginning of the quarter. Debt was $10.8 billion, up from the beginning of the quarter, primarily due to the issuance of new debt. Boeing's operating cash flow of $2.1 billion in Q1 2017 was driven by solid operating performance and timing of receipts and expenditures. During the reported quarter, the Company repurchased 14.9 million shares for $2.5 billion; leaving $11.5 billion remaining under the current repurchase authorization which is expected to be completed over approximately the next two years. Total Company backlog at quarter-end was $480 billion, up from $473 billion at the beginning of the quarter, and included net orders for the quarter of $27 billion. At quarter-end, Boeing Capital's net portfolio balance was $4.0 billion. Total pension expense for Q1 2017 was $334 million, down from $629 million in the same period of the prior year. For FY17, Boeing increased its adjusted earnings per share forecast range to $9.20–$9.40, up from the earlier announced range of $9.10–$9.30. The Company is projecting GAAP earnings in the band of $10.35–$10.55 per share compared with the prior range of $10.25–$10.45. Boeing re-affirmed its FY17 revenues forecast in the range of $90.5 billion−$92.5 billion. On Friday, April 28, 2017, the stock closed the trading session at $184.83, slightly climbing 0.88% from its previous closing price of $183.22. A total volume of 2.17 million shares have exchanged hands. Boeing's stock price surged 11.16% in the last three months, 29.07% in the past six months, and 41.66% in the previous twelve months. Furthermore, since the start of the year, shares of the Company have gained 19.75%. The stock is trading at a PE ratio of 22.64 and has a dividend yield of 3.07%. Active Wall Street (AWS) produces regular sponsored and non-sponsored reports, articles, stock market blogs, and popular investment newsletters covering equities listed on NYSE and NASDAQ and micro-cap stocks. AWS has two distinct and independent departments. One department produces non-sponsored analyst certified content generally in the form of press releases, articles and reports covering equities listed on NYSE and NASDAQ and the other produces sponsored content (in most cases not reviewed by a registered analyst), which typically consists of compensated investment newsletters, articles and reports covering listed stocks and micro-caps. Such sponsored content is outside the scope of procedures detailed below. AWS has not been compensated; directly or indirectly; for producing or publishing this document. The non-sponsored content contained herein has been prepared by a writer (the "Author") and is fact checked and reviewed by a third party research service company (the "Reviewer") represented by a credentialed financial analyst, for further information on analyst credentials, please email info@activewallst.com. Rohit Tuli, a CFA® charterholder (the "Sponsor"), provides necessary guidance in preparing the document templates. The Reviewer has reviewed and revised the content, as necessary, based on publicly available information which is believed to be reliable. Content is researched, written and reviewed on a reasonable-effort basis. The Reviewer has not performed any independent investigations or forensic audits to validate the information herein. The Reviewer has only independently reviewed the information provided by the Author according to the procedures outlined by AWS. AWS is not entitled to veto or interfere in the application of such procedures by the third-party research service company to the articles, documents or reports, as the case may be. Unless otherwise noted, any content outside of this document has no association with the Author or the Reviewer in any way. AWS, the Author, and the Reviewer are not responsible for any error which may be occasioned at the time of printing of this document or any error, mistake or shortcoming. No liability is accepted whatsoever for any direct, indirect or consequential loss arising from the use of this document. AWS, the Author, and the Reviewer expressly disclaim any fiduciary responsibility or liability for any consequences, financial or otherwise arising from any reliance placed on the information in this document. Additionally, AWS, the Author, and the Reviewer do not (1) guarantee the accuracy, timeliness, completeness or correct sequencing of the information, or (2) warrant any results from use of the information. The included information is subject to change without notice. This document is not intended as an offering, recommendation, or a solicitation of an offer to buy or sell the securities mentioned or discussed, and is to be used for informational purposes only. Please read all associated disclosures and disclaimers in full before investing. Neither AWS nor any party affiliated with us is a registered investment adviser or broker-dealer with any agency or in any jurisdiction whatsoever. To download our report(s), read our disclosures, or for more information, visit http://www.activewallst.com/disclaimer/. For any questions, inquiries, or comments reach out to us directly. If you're a company we are covering and wish to no longer feature on our coverage list contact us via email and/or phone between 09:30 EDT to 16:00 EDT from Monday to Friday at: CFA® and Chartered Financial Analyst® are registered trademarks owned LONDON, UK / ACCESSWIRE / May 1, 2017 / Active Wall St. announces its post-earnings coverage on The Boeing Co. (NYSE: BA). The Company posted its first quarter fiscal 2017 results on April 26, 2017. The aerospace Company surpassed earnings expectations and also increased its earnings forecasts for the year. Register with us now for your free membership at: One of The Boeing's competitors within the Aerospace/Defense Products & Services space, Huntington Ingalls Industries, Inc. (NYSE: HII), announced on April 06, 2017, that it will release its Q1 2017 financial results on Thursday, May 04, 2017, and host an earnings conference call at 9 a.m. ET the same day. AWS will be initiating a research report on Huntington Ingalls Industries in the coming days. Today, AWS is promoting its earnings coverage on BA; touching on HII. Get our free coverage by signing up to: For the three months ended March 31, 2017, Boeing reported revenue of $20.98, down compared to revenue of $22.63 billion from the prior year's same period, which was slightly below analysts' consensus of $21.3 billion. For Q1 2017, Boeing reported net income of $1.45 billion, or $2.34 a share, up from $1.22 billion, or $1.83 per share, in Q1 2016. On an adjusted basis, the Company posted earnings of $2.01 per share, ahead of the Wall street's estimates of $1.91 per share. For Q1 2017, Boeing's Commercial Airplanes' revenue was $14.3 billion down 1% on a y-o-y basis, on services growth, offset by lower planned 737 deliveries. The segment's operating margin increased 130 basis points to 8.5%, reflecting improved performance on production and services programs, cost growth on the initial production of KC-46 Tanker aircraft, and less favorable delivery mix. During the reported quarter, Boeing successfully completed first flight of the 787-10 Dreamliner. The 737 program rolled out the first 737 MAX 9 and received FAA certification for the 737 MAX 8. The Company has reported strong demand for the 737 MAX with more than 3,700 orders since launch. Commercial Airplanes booked 198 net orders during Q1 2017. The segment's Backlog remains robust with more than 5,700 airplanes valued at $417 billion. During Q1 2017, Boeing's Defense, Space & Security division's revenue totaled $6.5 billion down 18% on a y-o-y basis. The segment's operating margin increased 100 basis points to 11.3%, reflecting improved performance at Boeing Military Aircraft (BMA). The BMA's reported quarter revenue was $2.6 billion down 28% compared to the year ago comparable period, reflecting lower planned deliveries, and operating margin increased to 12.2% on improved performance. During Q1 2017, BMA was awarded a contract for 268 AH-64E Apache helicopters from the US Army, a contract for 17 P-8A Poseidon aircraft from the US Navy, Royal Australian Air Force, and the U.K. Royal Air Force, and a contract from the US Air Force for an additional 15 KC-46 Tanker aircraft. Boeing's Network & Space Systems' (N&SS) revenue was $1.56 billion for Q1 2017, reflecting lower volume on Commercial Crew. The segment's operating margin was 6.3% driven by lower satellite services volume and investments in development efforts. During the reported quarter, N&SS announced an order for a 702 satellite with a dual payload from SKY Perfect JSAT and Kacific. For Q1 2017, Boeing's Global Services & Support (GS&S) revenue was $2.33 billion, reflecting timing of contracts. The division's operating margin increased to 13.6% largely reflecting improved performance. During the reported quarter, GS&S was awarded a contract from the Republic of Korea Air Force to continue long-term sustainment of F-15 aircraft over the next five years. Backlog at Defense, Space & Security was $63 billion for Q1 2017, of which 34% represents orders from international customers. As of March 31, 2017, Boeing's cash and investments in marketable securities totaled $9.2 billion, down from $10.0 billion at the beginning of the quarter. Debt was $10.8 billion, up from the beginning of the quarter, primarily due to the issuance of new debt. Boeing's operating cash flow of $2.1 billion in Q1 2017 was driven by solid operating performance and timing of receipts and expenditures. During the reported quarter, the Company repurchased 14.9 million shares for $2.5 billion; leaving $11.5 billion remaining under the current repurchase authorization which is expected to be completed over approximately the next two years. Total Company backlog at quarter-end was $480 billion, up from $473 billion at the beginning of the quarter, and included net orders for the quarter of $27 billion. At quarter-end, Boeing Capital's net portfolio balance was $4.0 billion. Total pension expense for Q1 2017 was $334 million, down from $629 million in the same period of the prior year. For FY17, Boeing increased its adjusted earnings per share forecast range to $9.20–$9.40, up from the earlier announced range of $9.10–$9.30. The Company is projecting GAAP earnings in the band of $10.35–$10.55 per share compared with the prior range of $10.25–$10.45. Boeing re-affirmed its FY17 revenues forecast in the range of $90.5 billion−$92.5 billion. On Friday, April 28, 2017, the stock closed the trading session at $184.83, slightly climbing 0.88% from its previous closing price of $183.22. A total volume of 2.17 million shares have exchanged hands. Boeing's stock price surged 11.16% in the last three months, 29.07% in the past six months, and 41.66% in the previous twelve months. Furthermore, since the start of the year, shares of the Company have gained 19.75%. The stock is trading at a PE ratio of 22.64 and has a dividend yield of 3.07%. Active Wall Street (AWS) produces regular sponsored and non-sponsored reports, articles, stock market blogs, and popular investment newsletters covering equities listed on NYSE and NASDAQ and micro-cap stocks. AWS has two distinct and independent departments. One department produces non-sponsored analyst certified content generally in the form of press releases, articles and reports covering equities listed on NYSE and NASDAQ and the other produces sponsored content (in most cases not reviewed by a registered analyst), which typically consists of compensated investment newsletters, articles and reports covering listed stocks and micro-caps. Such sponsored content is outside the scope of procedures detailed below. AWS has not been compensated; directly or indirectly; for producing or publishing this document. The non-sponsored content contained herein has been prepared by a writer (the "Author") and is fact checked and reviewed by a third party research service company (the "Reviewer") represented by a credentialed financial analyst, for further information on analyst credentials, please email info@activewallst.com. Rohit Tuli, a CFA® charterholder (the "Sponsor"), provides necessary guidance in preparing the document templates. The Reviewer has reviewed and revised the content, as necessary, based on publicly available information which is believed to be reliable. Content is researched, written and reviewed on a reasonable-effort basis. The Reviewer has not performed any independent investigations or forensic audits to validate the information herein. The Reviewer has only independently reviewed the information provided by the Author according to the procedures outlined by AWS. AWS is not entitled to veto or interfere in the application of such procedures by the third-party research service company to the articles, documents or reports, as the case may be. Unless otherwise noted, any content outside of this document has no association with the Author or the Reviewer in any way. AWS, the Author, and the Reviewer are not responsible for any error which may be occasioned at the time of printing of this document or any error, mistake or shortcoming. No liability is accepted whatsoever for any direct, indirect or consequential loss arising from the use of this document. AWS, the Author, and the Reviewer expressly disclaim any fiduciary responsibility or liability for any consequences, financial or otherwise arising from any reliance placed on the information in this document. Additionally, AWS, the Author, and the Reviewer do not (1) guarantee the accuracy, timeliness, completeness or correct sequencing of the information, or (2) warrant any results from use of the information. The included information is subject to change without notice. This document is not intended as an offering, recommendation, or a solicitation of an offer to buy or sell the securities mentioned or discussed, and is to be used for informational purposes only. Please read all associated disclosures and disclaimers in full before investing. Neither AWS nor any party affiliated with us is a registered investment adviser or broker-dealer with any agency or in any jurisdiction whatsoever. To download our report(s), read our disclosures, or for more information, visit http://www.activewallst.com/disclaimer/. For any questions, inquiries, or comments reach out to us directly. If you're a company we are covering and wish to no longer feature on our coverage list contact us via email and/or phone between 09:30 EDT to 16:00 EDT from Monday to Friday at: CFA® and Chartered Financial Analyst® are registered trademarks owned


Lee K.M.,Seoul National University | Lee K.M.,Republic of Korea Air Force | Woo S.J.,Seoul National University | Hwang J.-M.,Seoul National University
American Journal of Ophthalmology | Year: 2013

Purpose: To evaluate the morphologic characteristics of optic nerve head drusen. Design: Retrospective case series. Methods: setting: Institutional (Seoul National University Bundang Hospital). patients: Sixty-one patients with optic nerve head drusen. observation procedure: Visible and buried optic nerve head drusen were identified using funduscopy, whereas homogenous and nonhomogenous optic nerve head drusen were identified using spectral-domain optical coherence tomography images. Buried optic nerve head drusen were classified according to the size. main outcome measures: Classification of optic nerve head drusen. Results: Of 99 eyes in 61 patients, optic nerve head drusen were buried in 95 eyes and visible in 4 eyes. The patients with visible optic nerve head drusen were older on average than those with buried optic nerve head drusen (53.3 ± 8.6 years vs 13.5 ± 7.1 years; P <.001) and exhibited larger disc diameters (1643 ± 265 μm vs 1287 ± 185 μm; P =.016). All 4 eyes with visible optic nerve head drusen exhibited hyperreflective borders, which were not found in patients with buried optic nerve head drusen. Of 95 eyes with buried optic nerve head drusen, 64 eyes (67%) showed homogenous internal reflectivity, whereas 31 eyes (33%) showed nonhomogenous reflectivity with lobulations. Large optic nerve head drusen were associated with a small optic disc diameter, nonhomogenous internal reflectivity, a partial highly reflective border, intraretinal cysts, and increased temporal retinal nerve fiber layer thickness. Conclusions: Optic nerve head drusen have a diverse spectrum of spectral-domain optical coherence tomography findings associated with patient age and disc size. © 2013 by Elsevier Inc. All Rights Reserved.


Lee K.M.,Seoul National University | Lee K.M.,Republic of Korea Air Force | Hwang J.-M.,Seoul National University | Woo S.J.,Seoul National University
Retina | Year: 2014

PURPOSE:: To describe the clinical features of hemorrhagic complications secondary to optic nerve head drusen (ONHD) using spectral domain optical coherence tomography (SD-OCT). METHODS:: Sixty-three consecutive patients with SD-OCT-documented ONHD who presented at Seoul National University Bundang Hospital from December 2009 to July 2012 were included. Full ophthalmologic examinations, including fundus photographs, SD-OCT, fundus angiography, and visual field tests were analyzed in a total of 101 ONHD-positive eyes from 63 patients. RESULTS:: Hemorrhagic ONHD complications were found in 7 eyes (7%) from a total of 101 eyes with ONHD. All of them had buried ONHD (visualized with SD-OCT) and myopia (mean spherical equivalent = -4.00 ± 2.35 diopters). Patients with ONHD hemorrhagic complications had smaller disk diameters than patients without hemorrhagic complications (1,308 ± 166 vs. 1,555 ± 217 μm, P = 0.004). Peripapillary hemorrhages were classified into the following 3 types based on SD-OCT findings: subretinal (6 eyes, 86%), retinal (5 eyes, 71%), and vitreous hemorrhage (4 eyes, 57%). Six patients (86%) complained of the recent onset of visual symptoms, but visual acuities at presentation were 20/20 in all patients. In the three patients who were followed up, most hemorrhages were absorbed without complications. CONCLUSION:: Peripapillary hemorrhage can often occur in patients with buried ONHD and small disk diameters. As SD-OCT can be used to visualize ONHD beneath hemorrhage, it is helpful with the differential diagnosis and follow-up evaluation.© Ophthalmic Communication society,Inc.


BERWYN, Pa.--(BUSINESS WIRE)--Triumph Group, Inc. (NYSE:TGI) was selected by Korea Aerospace Industries, Ltd. (KAI), to provide Airframe Mounted Accessory Drives (AMAD) on the new KF-X fighter aircraft. The contract is in support of the latest generation of the air superiority fighter, which is scheduled to make its first flight in mid-2022 and begin low-rate initial production in 2024. The KF-X program is slated to benefit the Republic of Korea Air Force and the Indonesian Air Force. “We are pleased to support the KF-X fighter program, which will replace the aging Korean fleet of F-4s and F-5s, as well as equip the Indonesian Air Force,” said Tom Holzthum, executive vice president of Triumph Integrated Systems. “This win will allow Triumph to showcase the extensive capability and experience of our Geared Solutions business.” Triumph Integrated Systems’ Geared Solutions site in Park City, Utah, will design and produce the AMADs, which receive and distribute engine power to operate generators, pumps and other aircraft systems, and also carry the main engine starter turbine. The AMADs on the KF-X fighter jet will feature the latest innovations in the company’s aircraft accessory gearbox product line. Triumph Group, Inc., headquartered in Berwyn, Pa., designs, engineers, manufactures, repairs and overhauls a broad portfolio of aircraft structures, components, accessories, subassemblies and systems. The company serves a broad, worldwide spectrum of the aviation industry, including original equipment manufacturers of commercial, regional, business and military aircraft and aircraft components, as well as commercial and regional airlines and air cargo carriers. More information about Triumph can be found on the company’s website at http://www.triumphgroup.com.


News Article | November 21, 2016
Site: www.prnewswire.com

FORT WORTH, Texas, Nov. 21, 2016 /PRNewswire/ -- Lockheed Martin (NYSE: LMT) was awarded a $1.2 billion contract to upgrade 134 F-16 aircraft for the Republic of Korea Air Force (ROKAF). The upgrades are based on the advanced F-16V configuration. Among the enhancements are an Active...


ABSTRACT: This study was to investigate clinicopathological features including immunohistochemical subtype and radiological factors of primary breast cancer to predict axillary lymph node metastasis (ALNM) and preoperative risk stratification.From June 2004 to May 2014, 369 breast cancer patients (mean age, 54.7 years; range, 29–82 years) who underwent surgical axillary node sampling were included. Two radiologists retrospectively reviewed clinicopathological features, initial mammography, and initial breast ultrasonography (US). Univariate and multivariate logistic regression analyses were used to evaluate associations between ALNM and variables. Odds ratio with 95% confidence interval and risk of ALNM were calculated.Among 369 patients, 117 (31.7%) had ALNM and 252 (68.3%) had no ALNM revealed surgically. On multivariate analysis, four factors showed positive association with ALNM: the presence of symptoms (P < 0.001), triple-negative breast cancer subtype (P = 0.001), mass size on US (>10 mm, P < 0.001), and Breast Imaging Reporting and Data System category on US (≥4c, P < 0.001). The significant risk of ALNM was particularly seen in patients with two or more factors (2, P = 0.013; 3, P < 0.001; 4, P < 0.001).The estimated risks of ALNM increased in patients with two, three, and four factors with odds ratios of 5.5, 14.3, and 60.0, respectively.The presence of symptoms, triple-negative breast cancer subtype, larger size mass on US (>10 mm), and higher Breast Imaging Reporting and Data System category on US (≥4c) were positively associated with ALNM. Radiologically, US findings are significant factors that can affect the decision making process regarding ALNM. Based on risk stratification, the possibility of ALNM can be better predicted if 2 or more associated factors existed preoperatively. Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved


Primary diffuse large B-cell lymphoma (DLBCL) of the testis is a rare subtype of testicular tumor. While the histomorphology of testicular DLBCL is well described, a paucity of information in the literature exists with regard to the cytological diagnosis of this subtype of tumor. Touch imprint specimens were obtained from a testicular DLBCL occurring in a 64-year-old man. The cytological features of imprints were compared with the results obtained from histological and immunohistochemical examinations. Smears obtained from the touch imprints exhibited a high cellular yield consisting of discretely arranged monomorphic large cells with irregular nuclear membranes, scant cytoplasm and conspicuous nucleoli. Histologically, the tumor consisted of discohesive neoplastic lymphocytes that infiltrated diffusely and produced a wide separation of intact seminiferous tubules. Diffuse, intense immunostaining for CD45, CD20, MUM1 and Ki-67 led to the diagnosis of primary DLBCL of the testis with a non-germinal center B-cell-like phenotype. Careful observation of the touch imprint specimens of testicular DLBCL revealed a high cellularity with a predominant single-cell pattern of monomorphic cells demonstrating irregular nuclear membranes and conspicuous nucleoli. In addition, DLBCL is capable of developing in the testis and forming a predominantly discohesive cell population, suggesting the presence of a lymphoid malignancy. Thus, it may be possible to detect morphological features that are characteristic of DLBCL using imprint cytology. To the best of our knowledge, this is the first study reporting the diagnosis of testicular DLBCL using touch imprint cytology.


Moon C.H.,Republic of Korea Air Force
British Journal of Ophthalmology | Year: 2016

Background The photorefractive keratectomy (PRK) is approved for Air Force pilots in several nations. The occupational environments of pilots in the Air Force are unique, including extremely high altitude, low oxygen tension, high ultraviolet light exposure and high G-force load. The short-term efficacy and safety of PRK for pilots are documented. However, the study for long-term visual and refractive outcomes of PRK in pilots is limited. Objective To investigate the long-term visual and refractive outcomes in a 4-year follow-up period after PRK in pilots with low to moderate myopia. Methods Thirty-eight eyes of 20 subjects that underwent PRK and recruited to Air Force pilot were evaluated preoperatively and at 3, 6, 12, 24, and 48 months postoperatively. Results The mean patient age was 21.42±0.75 years. The mean preoperative manifest refraction spherical equivalent (SE) was -1.51±1.15 diopters (D). At 4 years postoperatively, the mean SE was -0.29±0.51, 89.5% of eyes achieved 20/20 or better Snellen uncorrected visual acuity, 71.1% of eyes were within ±0.50 D of emmetropia. The refraction stabilised by 6 months and was maintained up to the 4-year follow-up stage. Conclusions PRK for pilots with low to moderate myopia is safe and effective in the long term. Highaltitude environmental stress exposure has no effect on the refractive stability after PRK.


Patent
Republic of Korea Air Force | Date: 2014-08-06

A laser shooting training system includes a target device including a target area and a camera for photographing the target area, and an analysis device for calculating a coordinate of a laser discharged to the target area based on an image photographed by the camera, and displaying a spotted position corresponding to the laser coordinate to a user display screen. The analysis device calculates a center coordinate of a laser area included in the image, corrects the center coordinate based on a correction value relating to a size of the laser area, and calculates the laser coordinate.

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