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Journal articles on the topic 'Littrow Condition'

Author: Grafiati

Published: 6 September 2023

Last updated: 31 July 2025

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1

Bezus, Evgeni A., Dmitry A. Bykov, and Leonid L. Doskolovich. "Integrated diffraction gratings on the Bloch surface wave platform supporting bound states in the continuum." Nanophotonics 10, no. 17 (2021): 4331–40. http://dx.doi.org/10.1515/nanoph-2021-0352.

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Abstract We propose and theoretically and numerically investigate integrated diffraction gratings for the Bloch surface wave (BSW) platform, which have subwavelength or near-subwavelength period. We demonstrate that, in the oblique incidence geometry of a transverse-electric polarized BSW and with a properly chosen band gap configuration of the photonic crystal supporting the surface waves, the proposed structures operate in the scattering-free regime, when the energy of the incident BSW is divided between the reflected and transmitted BSWs with the same polarization corresponding to the propa

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2

Yue, Pinliang, Mingyu Yang, Qingbin Jiao, et al. "Compact Numerical Aperture 0.5 Fiber Optic Spectrometer Design Using Active Image Plane Tilt." Sensors 24, no. 12 (2024): 3883. http://dx.doi.org/10.3390/s24123883.

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The numerical aperture of the spectrometer is crucial for weak signal detection. The transmission lens-based configuration has more optimization variations, and the grating can work approximately in the Littrow condition; thus, it is easier to acquire high numerical aperture (NA). However, designing a large aperture focusing lens remains challenging, and thus, ultra-high NA spectrometers are still difficult to acquire. In this paper, we propose a method of setting image plane tilt ahead directly when designing the large aperture focusing lens to simplify the high NA spectrometer design. By ana

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3

Wang, Qingyu, Honghai Shen, Weiqi Liu, Jingzhong Zhang, and Lingtong Meng. "Design of Compact Mid-Infrared Cooled Echelle Spectrometer Based on Toroidal Uniform-Line-Spaced (TULS) Grating." Sensors 22, no. 19 (2022): 7291. http://dx.doi.org/10.3390/s22197291.

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A traditional flat-panel spectrometer does not allow high-resolution observation and miniaturization simultaneously. In this study, a compact, high-resolution cross-dispersion spectrometer was designed based on the theoretical basis of echelle grating for recording an infrared spectrum. To meet the high-resolution observation and miniaturization design requirements, a reflective immersion grating was used as the primary spectroscopic device. To compress the beam aperture of the imaging system, the order-separation device of the spectrometer adopted toroidal uniform line grating, which had both

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4

Liu, Weijian, Qun Yuan, Ruoyan Wang, et al. "Nonnull interferometric testing of spherical gratings under Littrow conditions with opposite diffraction orders." Applied Optics 59, no. 21 (2020): 6360. http://dx.doi.org/10.1364/ao.398003.

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Wang, Qingyu, Honghai Shen, Weiqi Liu, and Pengzhang Dai. "A High-Resolution MIR Echelle Grating Spectrometer with a Three-Mirror Anastigmatic System." Applied Sciences 12, no. 16 (2022): 8013. http://dx.doi.org/10.3390/app12168013.

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With the emergence of high-performance infrared detectors and the latest progress in grating manufacturing technology, high-resolution and high-sensitivity infrared spectrometers provide new methods for application to many fields, including astronomy and remote sensing detection. Spectral detection has attracted considerable attention due to its advantages of noncontact and stability. To obtain the detailed features of the missile’s tail flame spectrum, traditional plane reflection gratings are used as the main dispersive element; however, the instrument’s volume will increase with increasing

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6

Qiao, Mingle, Yongfang Xie, Shihao Kang, Jin Wang, and Changhe Zhou. "Polarization-independent and high-efficiency 2D dielectric transmission grating under Littrow incidence." Optics Express 32, no. 20 (2024): 35642. http://dx.doi.org/10.1364/oe.537907.

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In this paper, a transmission two-dimensional (2D) all-dielectric grating with cuboid arrays is proposed, which has high diffraction efficiency and good polarization independence under Littrow mounting conditions at an incident wavelength of 780 nm. The optimization results indicate that when the incident wavelength is 780 nm, the diffraction efficiency of the (−1, 0) order of transverse electric (TE) and transverse magnetic (TM) polarizations can reach 98.62% and 98.23%, respectively, with the polarization-dependent loss (PDL) of 0.017 dB. To the best of our knowledge, high-efficiency polariz

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7

Baroudi, G. El, M. Boulatar, F. K. Maaroufi, W. Ait Belaid T. Ahbala, K. Rabbani, and A. Louzi. "HERNIE DE LITTRE OMBILICALE CHEZ LADULTE: A PROPOS DUN CAS." International Journal of Advanced Research 12, no. 09 (2024): 386–89. http://dx.doi.org/10.21474/ijar01/19466.

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Le diverticule de Meckel est une anomalie congenitale frequente de lintestin grele. Cependant, lorsquun diverticule de Meckel se retrouve dans un sac herniaire, en particulier dans la region ombilicale, il forme ce quon appelle une hernie de Littre. Cette condition rare est associee a des complications graves et necessite une attention diagnostique et chirurgicale specifique.Nous rapportons le cas dun homme age de 56 ans, admis pour une tumefaction ombilicale non douloureuse et reductible. Le diagnostic de hernie ombilicale simple a ete pose. En per operatoire, il a ete decouvert dans le sac h

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8

Roberto-Santamaría, Juan, María J. Rueda-Medécigo, Mariana P. Carmona Olivares, and Alberto Navarrete-Peón. "Littre´s hernia: a case presentation." Mexican Journal of Medical Research ICSA 12, no. 23 (2024): 1–5. http://dx.doi.org/10.29057/mjmr.v12i23.11331.

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We report a case of Littre’s hernia in a 64-year old woman, which is a very uncommon condition, consists on an hernia whose content corresponds to a remnant of the omphalomesenteric duct, called Meckel’s diverticulum, that results from incomplete obliteration of the vitelline duct between the fifth and sixth weeks of human gestation as the bowel settles into its permanent position within the abdominal cavity. The diagnosis was made from the clinical findings and supported by diagnostic auxiliaries such as ultrasound and computed axial tomography (CAT). The intervention performed was a pre-peri

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9

Malling, Brian, Andreas Karlsen, and Jesper Hern. "Littre Hernia: A Rare Case of an Incarcerated Meckel’s Diverticulum." Ultrasound International Open 03, no. 02 (2017): E91—E92. http://dx.doi.org/10.1055/s-0043-102179.

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A Meckel’s diverticulum is a remnant of the vitelline duct, which leads to the formation of a true diverticulum containing all layers of the small intestine. The diverticulum can contain ectopic gastric, duodenal or pancreatic tissue and is the most common congenital anomaly of the gastrointestinal tract with estimates of prevalence ranging from 0.3% to 3%. The condition is usually clinically silent. In children the most common complication is gastrointestinal bleeding caused by ulceration due to the acid secretion by ectopic gastric mucosa.

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10

Nepram, Joe, Kiratpal Singh Brar, Dhiraj Kumar, et al. "Mesodiverticular Band of Meckel’s Diverticulum Causing Small Intestinal Obstruction in Littre Hernia." NATIONAL BOARD OF EXAMINATIONS JOURNAL OF MEDICAL SCIENCES 2, no. 6 (2024): 612–15. http://dx.doi.org/10.61770/nbejms.2024.v02.i06.010.

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Mesodiverticular band associated with Meckel’s diverticulum can lead to surgical emergencies like intestinal obstruction or volvulus and may prove fatal as this pathology is quite rare, it may escape the clinical diagnosis. This band needs to be excised during emergent laparotomy along with Meckel’s diverticulectomy. A high level of clinical suspicion and surgical acumen is required to manage this rare condition and have an uneventful recovery of the patient.

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11

Littrup, Signe Lykke, and Poul Grinder-Hansen. "Fakta og fantasi, historiebrug og museernes troværdighed." Nordisk Museologi 35, no. 1-2 (2024): 20–36. http://dx.doi.org/10.5617/nm.10817.

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This article discusses a somewhat controversial exhibition at the UNESCO World Heritage Site Kronborg Castle in Elsinore, The Royal Series at Kronborg Castle – Facts and Imagination with Jim Lyngvild and Poul Grinder- Hansen, which opened at Kronborg Castle in April 2021. The authors contributed to the exhibition’s content and form, Signe Lykke Littrup as curator and project manager, senior researcher Poul Grinder-Hansen as historical co-creator of the exhibition’s content in text, speech, and film. The article is built around experiences from the exhibition, methodological and theoretical con

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12

Tinker, Daniel, and Rick Arcano. "Allometric Model Development in Lodgepole Pine Forests of the Greater Yellowstone Ecosystem." UW National Parks Service Research Station Annual Reports 29 (January 1, 2005): 115–19. http://dx.doi.org/10.13001/uwnpsrc.2005.3627.

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Allometric equations for estimating aboveÂ and belowground biomass of lodgepole pine have been developed in Alberta, Canada, southeastern British Columbia, southeastern WY, and in Washington and Oregon (Johnstone 1971; Comeau and Kimmins 1989; Pearson et al. 1984; Gholz et al. 1979, respectively). More recently, allometric equations for young lodgepole pine saplings have also been developed in Yellowstone National Park (YNP) for aboveground biomass by Turner et al. (2004), and for belowground biomass by Litton et al. (2003). However, because of variability in latitude, growing conditions, sub

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13

Saliou, Bangoura Mohamed, Guirassy Mariama II, Keita Doubany Mariame, and Barry Boubacar. "Strangulated Littré Hernia Apropos of a Case in the Department of General and Visceral Surgery of the National Hospital Ignace Deen CHU Conakry." EAS Journal of Medicine and Surgery 5, no. 06 (2023): 104–6. http://dx.doi.org/10.36349/easjms.2023.v05i06.007.

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Littré's hernia is the presence of Mekel's diverticulum in the hernial sac. Meckel's diverticulum is the most common birth defect of the digestive tract. It results from the involution of the omphalomesenteric or vitelline duct which normally becomes obliterated around the sixth week of intrauterine life. Although this condition is common, its presence in the hernial sac during the cure of a hernial strangulation is an extremely rare case in our practice. We report a case concerning a 42-year-old sportsman, admitted to the general and visceral surgery department of the Ignace Deen National Hos

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14

Libbrecht, Tine, Johan P. Bjørgen, Jorrit Leenaarts, Jaime de la Cruz Rodríguez, Viggo Hansteen, and Jayant Joshi. "Line formation of He I D3 and He I 10 830 Å in a small-scale reconnection event." Astronomy & Astrophysics 652 (August 2021): A146. http://dx.doi.org/10.1051/0004-6361/202039788.

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Context. Ellerman bombs (EBs) and UV bursts are small-scale reconnection events that occur in the region of the upper photosphere to the chromosphere. It has recently been discovered that these events can have emission signatures in the He I D3 and He I 10 830 Å lines, suggesting that their temperatures are higher than previously expected. Aims. We aim to explain the line formation of He I D3 and He I 10 830 Å in small-scale reconnection events. Methods. We used a simulated EB in a Bifrost-generated radiative magnetohydrodynamics snapshot. The resulting He I D3 and He I 10 830 Å line intensiti

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15

Tinker, Daniel, and Rick Arcano. "Allometric Model Development in Lodgepole Pine Forests of the Greater Yellowstone Ecosystem." UW National Parks Service Research Station Annual Reports 28 (January 1, 2004): 70–74. http://dx.doi.org/10.13001/uwnpsrc.2004.3579.

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Changes in climatic patterns in western North America may modify natural fire regimes, resulting in alterations in forest structure and productivity (Amiro et al. 2000). More frequent fues would create substantial landscape-scale heterogeneity and, consequently, variability in how individual trees and stands allocate biomass in response to the differences in forest structure (Chapin et al. 2002; Turner et al. 2004). For example, in the lodgepole pine (Pinus contorta var. latifolia [Engelm. ex Wats.] Critchfield) forests of the Greater Yellowstone Ecosystem (GYE), recent and historic fires have

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16

Wu, Chengyue, Angela M. Jarrett, Zijian Zhou, et al. "Abstract P1-08-08: Forecasting treatment response to neoadjuvant systemic therapy in triple negative breast cancer viamathematical modeling and quantitative MRI." Cancer Research 82, no. 4_Supplement (2022): P1–08–08—P1–08–08. http://dx.doi.org/10.1158/1538-7445.sabcs21-p1-08-08.

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Abstract Introduction:. Patients with locally advanced triple-negative breast cancer (TNBC) typically receive neoadjuvant therapy (NAT) to downstage the tumor and to improve the outcome of the subsequent breast conservation surgery. A critical unmet need is the lack of a method to accurately predict how a patient with TNBC will respond to NAT before surgery. In this work, we applied a clinical-computational framework to predict response of TNBC early in the course of NAT, by integrating quantitative MRI with mechanism-based mathematical modeling. Methods:. Patients and Data. Multiparametric qu

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17

"Plastic of the Solid Domestic Waste on the Coastal Zone of the Northwestern Part of the Black Sea as a Component of Marine Littre." Visnyk of V. N. Karazin Kharkiv National University series "Ecology", no. 23 (2020). http://dx.doi.org/10.26565/1992-4259-2020-23-06.

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Purpose. The goal of the study is estimation the scale of the plastic waste’s area in the coastal zone of the Northwestern part of the Black Sea and their role of the of polution formation. Methods. The base of methods is system analyses. Results. The annual volume of solid waste in the North-Western Black Sea region can reach 2.5 million tons per year, and the volume of plastic littre - up to 323 thousand tons per year. In spite of of plastic littre as the resource, at present there is no definite system for handling them, and under these conditions they are disposed of at numerous dumps (inc

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18

Matias, Mariana, Madara Kronberga, and Assad Aghahoseini. "EP.FRI.452 Complicated Littre Hernias." British Journal of Surgery 108, Supplement_7 (2021). http://dx.doi.org/10.1093/bjs/znab312.070.

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Abstract Background Meckel’s diverticulum is the most prevalent congenital anomaly of the gastrointestinal tract with an estimated prevalence ranging from 2% to 4%. The diverticulum is a remnant of the vitelline duct, which leads to the formation of a true diverticulum containing all the layers of the small intestine. The condition is usually clinically silent; however, it can present with unusual symptoms and signs and therefore can result in a delayed diagnosis, particularly in adults. The aim of this study is to review the most recent literature reporting Littre hernias in adults, the diagn

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19

Thi Luong, Dao, Duong Van Hop, and Ha Thi Hang. "Culture Condition for High Biomass Production of Probiotic Yeast Saccharomyces Boulardii SB2 in Shake Flask and 30 Littre Scale." VNU Journal of Science: Natural Sciences and Technology 35, no. 3 (2019). http://dx.doi.org/10.25073/2588-1140/vnunst.4879.

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Probiotic properties in vitroof the Saccharomyces boulardii SB2 yeast, was isolated from fruit at Cuc Phuong National Park were evaluated based on biological characteristics and tolerance in simulated intestinal conditions. In the present work, studies were carried out to improve cell growth kinetics to produce cell mass of this biotherapeutic yeast in shake flaskand 30-L bioreactor levels. In case of shake flask, the highest biomass was obtained under the culture conditions as YM medium, at 37oC, pH 6, inoculum concentration of 5 %, with shaking for 32 h; the best sources of carbon and nitrog

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20

Dr, Moazzam Hussain Dr Momal Khan Lodhi Dr Behram Hussain. "AN IMPENDING CONDITION IN PATIENTS IN INGUINAL HERNIA WITH UNDOMAIN CONTENTS." August 29, 2020. https://doi.org/10.5281/zenodo.4007796.

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<strong><em>Aim:</em></strong><em> Inguinal hernia when incarcerated may present an emergency due to the impending danger of strangulation and subsequent necrosis of its contents. Intra-abdominal organs, e.g. small intestine, omentum, colon are commonly found in incarcerated inguinal hernia. However, some contents are reported rarely including vermiform appendix, acute appendicitis, Meckel's diverticulum, epiploic appendagitis, ovary, fallopian tube,  urinary bladder diverticula. Medical professionals must be aware of unusual contents to plan effective management of the problem. </em>

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21

Khamas, Ahmed, and Salah Salih. "Strangulated Littre's direct inguinal hernia: a case report and literature review." Journal of Surgical Case Reports 2025, no. 7 (2025). https://doi.org/10.1093/jscr/rjaf416.

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Abstract The rare occurrence of a Meckel's diverticulum within a hernial sac, known as a Littre’s hernia, was first described by the French anatomist and surgeon Alexis Littré in the 18th century. This condition is observed in only 0.09% of strangulated hernias. Patients typically present with an irreducible lump in the groin. In this case report, we present a 66-year-old man who sought medical attention with a 72-hour history of an incarcerated inguinal hernia. Patient underwent hernia repair and intraoperatively, strangulated Meckel's diverticulum, adhered medially to the base of the sac, wa

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22

Glinkowski, Sławomir, and Daria Marcinkowska. "Meckel’s diverticulum: an unusual finding during inguinal hernioplasty." Nowa Medycyna 25, no. 2 (2018). http://dx.doi.org/10.25121/nm.2018.25.2.71.

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Meckel’s diverticulum is the most common congenital malalignment of the gastrointestinal tract, present in 2-4% of population. It occurs as an embryologic remnant of the vitelline duct. It may have different histological texture. Usually it is diagnosed only during autopsy or intraoperatively. Symptoms such as haemorrhage, inflammation or perforation are possible but very rare. The authors present a case of a patient who received scheduled surgical treatment due to right inguinal hernia. Meckel’s diverticulum was intraoperatively identified in the hernial sac. It was resected and sent for hist

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23

Reagan, Charles. "Recognition and Justice." Études Ricoeuriennes / Ricoeur Studies 6, no. 2 (2016). http://dx.doi.org/10.5195/errs.2015.276.

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Paul Ricœur devoted much of his last ten years to studies and analyses of justice and recognition. This paper will trace the indelible bonds between justice and recognition and claim that recognition is a necessary condition for justice and that justice is the telos or goal of recognition. I begin this paper with a review of the multiple meanings of recognition in the two famous French dictionaries, the Littré (1859-1872) and the Le Grand Robert (1985). In his book, The Course of Recognition (2005), Ricoeur groups recognition under three headings, recognition as a form of knowledge or cognitio

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24

Eloir Gabriel, Mateus, Luan Cleber Henker, Christofe Carneiro, et al. "Typhlocolitis by Edwardsiella tarda in a Cow." Acta Scientiae Veterinariae 47 (April 12, 2019). http://dx.doi.org/10.22456/1679-9216.91420.

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Background: Edwardsiella tarda has been report as etiology of gastroenteritis in both human and veterinary medicine, usually associated with exposure to aquatic environments in immunocompromised individuals. The present report describes a case of typhlocolitis in a cow in the west region of Santa Catarina state, Brazil. Case: After clinically evaluation of animal and proceeding euthanasia and realized the necropsy. Tissue samples were collected, and routinely processed for histological examination. Histopathological lesions were described as mild, moderate and severe. Tissue and swabs samples

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