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Relevant bibliographies by topics / Haller cell

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Academic literature on the topic 'Haller cell'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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Journal articles on the topic "Haller cell"

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Dhingra, Shruti, and Satyawati Mohindra. "Isolated Mucocele in an Infraorbital Ethmoidal Cell—Haller Cell: A Unique Presentation." An International Journal Clinical Rhinology 6, no. 1 (2013): 44–46. http://dx.doi.org/10.5005/jp-journals-10013-1147.

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ABSTRACT Haller cell was first described by 18th century Swiss anatomist Albrecht von Haller. Haller cells make up the posterior and superior wall of the ethmoid infundibulum. They can cause obstruction of ethmoidal infundibulum after enlargement. Isolated infection of the Haller cell is usually very rare and should be suspected in patients with visual complaints or facial pain. Diagnosis can be made on radiology. Here, we report a patient with complaints of left-sided eye pain for the last 4 months which was finally diagnosed as Haller cell mucocele and successfully managed via endoscopic marsupialization. How to cite this article Mohindra S, Dhingra S. Isolated Mucocele in an Infraorbital Ethmoidal Cell—Haller Cell: A Unique Presentation. Clin Rhinol An Int J 2013;6(1):44-46.

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Thiagarajan, Balasubramanian. "Infected Haller cell." Online Journal of Otolaryngology 2, no. 3 (2012): 4. http://dx.doi.org/10.5455/jorl.51-1322235174.

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Dhingra, Shruti, and Satyawati Mohindra. "Isolated Mucocele in an Infraorbital Ethmoidal-Haller Cell: A Unique Presentation." An International Journal Clinical Rhinology 6, no. 3 (2013): 129–30. http://dx.doi.org/10.5005/jp-journals-10013-1172.

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ABSTRACT Haller cell, was first described by 18th century Swiss anatomist Albrecht von Haller. Haller cells make up the posterior and superior wall of the ethmoid infundibulum. They can cause obstruction of ethmoidal infundibulum after enlargement. Isolated infection of the Haller cell is usually very rare and should be suspected in patients with visual complaints or facial pain. Diagnosis can be made on radiology. Here, we report a patient with complaints of left-sided eye pain for the last 4 months which was finally diagnosed as Haller cell mucocele and successfully managed via endoscopic marsupialization. How to cite this article Mohindra S, Dhingra S. Isolated Mucocele in an Infraorbital Ethmoidal-Haller Cell: A Unique Presentation. Clin Rhinol An Int J 2013;6(3):129-130.

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Stackpole, Sarah A., and David R. Edelstein. "The Anatomic Relevance of the Haller Cell in Sinusitis." American Journal of Rhinology 11, no. 3 (1997): 219–24. http://dx.doi.org/10.2500/105065897781751910.

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In current theories of sinusitis, obstruction at the ostiomeatal complex leads to localized inflammation and infection. Haller cells, an extension of ethmoid pneumatization along the maxillary antrum roof, have also been suggested as a causative factor in sinusitis because of their ability to cause narrowing of the infundibulum. Coronal CT scans were reviewed in 154 patients to evaluate the role of Haller cells in sinusitis. Haller cells were present in 34% of patients. The cells were graded as small, medium, or large, and correlated with radiologic evidence of sinusitis (e.g., mucosal thickening or opacification). A statistically significant increase in maxillary sinus mucosal disease was noted in patients with medium or large Haller cells (45.8%) versus those with small cells (28.9%, p < 0.05). Thus obstructive medium and large Haller cells may be an etiologic factor in sinusitis.

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Boffano, Paolo, Rodolfo Benech, Cesare Gallesio, and Sid Berrone. "A Giant Haller Cell?" Journal of Craniofacial Surgery 24, no. 3 (2013): 1053. http://dx.doi.org/10.1097/scs.0b013e3182869acb.

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Ghosh, Debangshu, Dilip Kumar Baruah, Subodh Chandra Goswmi, and Sumit Kumar Basu. "Lateral Rhinotomy for a Large, Infected Haller Cell Causing Proptosis." Philippine Journal of Otolaryngology-Head and Neck Surgery 30, no. 1 (2018): 4. http://dx.doi.org/10.32412/pjohns.v30i1.389.

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Objective: To report a case of a large sinus Haller cell that presented with chronic rhinosinusitis and proptosis and its surgical management. Method: Design: Case Report Setting: Tertiary Government Hospital Participants: One (1) Results: A 34-year-old lady with proptosis and secondary sinusitis due to a giant infected Haller cell was successfully treated by lateral rhinotomy approach and clearance of all diseased mucosa therein into the nasal cavity. Conclusion: Approach to diseased sinonasal structures via lateral rhinotomy is an alternative to endoscopic sinus surgery in the presence of an unusually large Haller cell. Keywords: Haller cell. proptosis. maxillary sinusitis. lateral rhinotomy.

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Ragini, Raina, Sinha Vineet, and Kumar Satish. "Study of the Incidence of Onodi Cell, Haller Cell, supraorbital Cell with Anatomic Variations of the Ostiomeatal Complex Using Computed Tomography." International Journal of Pharmaceutical and Clinical Research 16, no. 4 (2024): 1355–59. https://doi.org/10.5281/zenodo.12809444.

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<strong>Background</strong><strong>:</strong> The ostiomeatal complex (OMC) is a critical anatomical region in the nasal cavity, serving as the primary drainage pathway for the frontal, maxillary, and anterior ethmoidal sinuses. Anatomical variations within the OMC, such as Onodi cells, Haller cells, and supraorbital cells, can significantly impact sinus drainage and predispose individuals to chronic rhinosinusitis and other sinus disorders. This study aims to determine the incidence of Onodi cells, Haller cells, supraorbital cells, and other anatomical variations of the OMC using computed tomography (CT) imaging. <strong>Methods</strong><strong>:</strong> A cross-sectional study was carried out on fifty patients who had CT scans done to assess their sinuses. Records were kept of the existence of Onodi cells, Haller cells, supraorbital cells, and other anatomical variants such agger nasi cells and concha bullosa cells. To find the frequency of these variations, the data were examined. <strong>Results</strong><strong>:</strong> The study revealed that concha bullosa was the most prevalent anatomical variation, observed in 16% of patients. Agger nasi cells were present in 14% of cases, Onodi cells in 4%, Haller cells in 6%, and supraorbital cells in 2%. Additionally, 4% of patients had Type I frontal cells, and 2% showed pneumatization of the crista galli. The majority of patients were younger than 30 years, with a higher prevalence of anatomical variations in males. <strong>Conclusion</strong><strong>:</strong> The study highlights the significant incidence of anatomical variations in the OMC, particularly concha bullosa and agger nasi cells. These variations can impact sinus drainage and contribute to chronic rhinosinusitis. Detailed preoperative CT evaluation is crucial for identifying these variations to improve surgical planning and outcomes. <strong>Recommendations</strong><strong>:</strong> Routine use of high-resolution CT imaging is recommended for patients undergoing evaluation for sinus diseases to accurately identify anatomical variations. Further studies with larger sample sizes are needed to explore the clinical implications of these variations in different populations.      

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Moshfeghi, Mahkameh, Hamidreza Dehini, and Mitra Ghazizadeh Ahsaie. "Cone Beam CT Analysis of Haller Cells: Prevalence and Relationship with Orbital Floor Dehiscence." International Journal of Dentistry 2023 (January 31, 2023): 1–6. http://dx.doi.org/10.1155/2023/5200152.

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Background and Aim. Haller cells arise from anterior ethmoid air cells and are located in the medial orbital floor, lateral to the maxillary infundibulum. The aim of this cross-sectional study was to determine the prevalence of the Haller cells and its relationship with orbital floor dehiscence on cone beam CT images. Materials and Methods. CBCT images of 120 patients were interpreted in coronal plane for the presence of Haller cells and orbital floor dehiscence. The prevalence of Haller cell, presence of dehiscence, unilateral, or bilateral frequency were assessed. In addition, the size was categorized in three groups of small, medium, and large. Chi-square and Cochran–Mantel–Haenszel tests were used for statistical analysis of the data, and p < 0.05 was considered to be significant. Results. A total of 51 male and 69 female with mean ± SD age of 38.84 ± 68.14 were assessed. The overall prevalence of Haller cells was 56.7%, of which 44 (64.7%) were unilateral and 24 were bilateral (35.3%). The majority of the cells (70.7%) were seen in medium (2–4 mm) sized. There was a significant association between Haller cells and orbital floor dehiscence ( p ≤ 0.001 ). Conclusion. The prevalence of Haller cells was remarkably high and the presence of Haller cells was strongly associated with ipsilateral orbital floor dehiscence. Based on the findings of this study, CBCT can be useful in delineation of the bony anatomy of sinonasal complex.

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Yanagisawa, Eiji, and Martin J. Citardi. "Endoscopic View of the Infraorbital Ethmoid Cell (Haller Cell)." Ear, Nose & Throat Journal 75, no. 7 (1996): 406–7. http://dx.doi.org/10.1177/014556139607500706.

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Christmas, Dewey A., Joseph P. Mirante, and Eiji Yanagisawa. "Endoscopic View of Bilateral Haller Cell Ostia." Ear, Nose & Throat Journal 90, no. 6 (2011): 246. http://dx.doi.org/10.1177/014556131109000602.

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Dissertations / Theses on the topic "Haller cell"

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Khaloian, Sarnaghi Sevana [Verfasser], Dirk [Akademischer Betreuer] Haller, Nina Henriette [Gutachter] Uhlenhaut, and Dirk [Gutachter] Haller. "Mitochondrial impairment drives intestinal stem cell transition towards dysfunctional Paneth cells predicting Crohn’s disease recurrence / Sevana Khaloian Sarnaghi ; Gutachter: Nina Henriette Uhlenhaut, Dirk Haller ; Betreuer: Dirk Haller." München : Universitätsbibliothek der TU München, 2021. http://d-nb.info/1238374077/34.

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Lobner, Elena [Verfasser], Dirk [Akademischer Betreuer] Haller, Dirk [Gutachter] Haller, and Mathias [Gutachter] Heikenwälder. "Epithelial Cell-Specific Induction of Activating Transcription Factor 6 Signaling Promotes Intestinal Dysbiosis and Colonic Tumorigenesis / Elena Lobner ; Gutachter: Dirk Haller, Mathias Heikenwälder ; Betreuer: Dirk Haller." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1168380308/34.

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Lobner, Elena Verfasser], Dirk [Akademischer Betreuer] [Haller, Dirk [Gutachter] Haller, and Mathias [Gutachter] Heikenwälder. "Epithelial Cell-Specific Induction of Activating Transcription Factor 6 Signaling Promotes Intestinal Dysbiosis and Colonic Tumorigenesis / Elena Lobner ; Gutachter: Dirk Haller, Mathias Heikenwälder ; Betreuer: Dirk Haller." München : Universitätsbibliothek der TU München, 2018. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20180724-1402311-1-4.

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Dössinger, Georg [Verfasser], Iris [Akademischer Betreuer] Antes, Dirk [Akademischer Betreuer] Haller, and Dirk [Akademischer Betreuer] Busch. "MHC multimer purification of rare antigen specific T cells and direct T cell receptor isolation by single cell PCR / Georg Dössinger. Gutachter: Dirk Haller ; Iris Antes ; Dirk Busch. Betreuer: Iris Antes." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1053467699/34.

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Pawelka, Kim Melissa [Verfasser], Percy A. [Akademischer Betreuer] Knolle, Percy A. [Gutachter] Knolle, and Dirk [Gutachter] Haller. "Characterization of myeloid cells inducing local T cell activation and proliferation in the hepatic environment / Kim Melissa Pawelka ; Gutachter: Percy A. Knolle, Dirk Haller ; Betreuer: Percy A. Knolle." München : Universitätsbibliothek der TU München, 2021. http://d-nb.info/1238374085/34.

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Effenberger, Manuel [Verfasser], Dirk H. [Akademischer Betreuer] Busch, Dirk [Gutachter] Haller, Dirk H. [Gutachter] Busch, and Vigo [Gutachter] Heissmeyer. "Isolation, Characerization and Functional Re-Expression of T Cell Receptors with Therapeutic Value for Adoptive T Cell Therapy / Manuel Effenberger ; Gutachter: Dirk Haller, Dirk H. Busch, Vigo Heissmeyer ; Betreuer: Dirk H. Busch." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1212178092/34.

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Käbisch, Romy Astrid [Verfasser], Markus [Akademischer Betreuer] Gerhard, and Dirk [Akademischer Betreuer] Haller. "Effect of Helicobacter pylori infection on dendritic cell maturation, signalling and subsequent adaptive immune response / Romy Astrid Käbisch. Gutachter: Dirk Haller ; Markus Gerhard. Betreuer: Markus Gerhard." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/1060482630/34.

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May, Stéphanie [Verfasser], Thomas [Akademischer Betreuer] Skurk, and Dirk [Akademischer Betreuer] Haller. "Influence of adipogenesis and high fat diet on the development of cell stress markers in adipose tissue / Stephanie May. Gutachter: Dirk Haller ; Thomas Skurk. Betreuer: Thomas Skurk." München : Universitätsbibliothek der TU München, 2013. http://d-nb.info/104744092X/34.

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Muschaweckh, Andreas [Verfasser], Jörg [Akademischer Betreuer] [Gutachter] Durner, Ingo [Gutachter] Drexler, and Dirk [Gutachter] Haller. "Characterization of tissue-resident CD8+ T cell memory formation upon skin infection with the viral vector MVA / Andreas Muschaweckh ; Gutachter: Ingo Drexler, Dirk Haller, Jörg Durner ; Betreuer: Jörg Durner." München : Universitätsbibliothek der TU München, 2016. http://d-nb.info/1135724822/34.

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Sehammar, Anders. "Övertonsmätning vid Södra Cell : Analys av halter och spridning av övertoner i Södra Cells elnät." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-68017.

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Rapporten presenterar övertonshalter på spänningen vid två procesställverk och ett och huvudställverket vid Södra Cells anläggning i Mönsterås. Mätningarna är viktade mot Energimarknadsinspektionens standard EIFS 2013:1. Det utvärderas även om övertoner från procesställverken sprider sig till överliggande huvudställverk. Dessutom utvärderas det om strömtransformatorer som sitter monterade i procesställverken har tillräcklig mätnoggrannhet för framtida övertonsmätningar.

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Books on the topic "Haller cell"

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International Congress on the History of Sciences (19th 1993 Zaragoza, Spain). Vitalisms: From Haller to the Cell Theory : proceedings of the Zaragoza symposium, XIXth International Congress of History of Science, 22-29 August 1993. L.S. Olschki, 1997.

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Deutsche Gesellschaft für Zellbiologie. Meeting. Annual meeting of the Deutsche Gesellschaft für Zellbiologie: Halle (Saale), March 16-20, 1997 : abstracts. Wissenschaftliche Verlagsgesellschaft, 1997.

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Denkmalpflege, Niedersächsisches Landesamt für. Das alte Rathaus von Celle: Die Sanierung der barocken Fassadenmalerei. Stadt Celle, 2010.

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Peter Halley: Cell Grids. Mousse Magazine and Publishing, 2024.

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Book chapters on the topic "Haller cell"

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Hechl, Peter S., Reuben C. Setliff, and Manfred Tschabitscher. "The Haller cell." In Endoscopic Anatomy of the Paranasal Sinuses. Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6536-2_11.

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Belitskus, David. "Carbon Electrodes in the Hall-Héroult Cell: A century of Progress." In Hall-Héroult Centennial. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118788011.ch11.

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Richards, N. E. "Evolution of Electrolytes for Hall-Héroult Cells." In Hall-Héroult Centennial. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118788011.ch9.

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Haupin, Warren. "History of Electrical Energy Consumption by Hall-Héroult Cells." In Hall-Héroult Centennial. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118788011.ch8.

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Gasparini, S., and A. Ménez. "Notexins (Notechis scutatus scutatus)." In Guidebook to Protein Toxins and Their Use in Cell Biology. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780198599555.003.0082.

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Abstract The tiger snake Notechis scutatus scutatus is the world’s fourth most venomous snake. Its venom contains curaremimetic neurotoxins and several PLA2s homologues which display various activities. Among the latter, notex¬ ins Np and Ns (Karlsson et al. 1972; Chwetzoff et al. 1990) which are frequently mixed in current preparations called ‘notexin’, are the most potent homologues. They are basic monomeric enzymatically active PLA2s which differ from each other by one residue (Halper and Eaker 1975; Chwetzoff et al. 1990). As judged from their primary (Halper and Eaker 1975; Chwetzoff et al. 1990) (see below) and tertiary (Westerlund et al. 1992) structures (Fig. 1), they belong to the PLA2s group I.

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Banaszak, Bogusław, and Grzegorz Kulka. "Obrona oficerskiego honoru czy zwykłe zabójstwo? Kontrowersje i dyskusja wokół wybranych orzeczeń wojskowego sądownictwa w II Rzeczypospolitej (do 1926 r.)." In Zagadnienia prawa konstytucyjnego. Polskie i zagraniczne rozwiązania ustrojowe. Księga jubileuszowa dedykowana Profesorowi Dariuszowi Góreckiemu w siedemdziesiątą rocznicę urodzin. Wydawnictwo Uniwersytetu Łódzkiego, 2016. http://dx.doi.org/10.18778/7969-841-7.03.

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Po odzyskaniu po ponad stu latach niepodległości przez Polskę doszło do zmian w sferze kulturalno-obyczajowej. Jednym z elementów owej strefy było m.in. honor, a zwłaszcza honor oficerski. Trudności, jeżeli chodzi o zdefiniowanie go wywodziły się z rozmaitego rodowodu pochodzenia kadry oficerskiej II RP (armie zaborców, Legiony Polskie czy błękitna armia gen. Hallera). Granica naruszenia honoru stała się dla każdej osoby własnym psychoetycznym elementem, która była wypadkową najróżniejszych czynników. W celu rozwiązania owych problemów powstało wówczas kilka poradników, w tym m.in. „Poradnik w sprawach honorowych” ppłk. Witolda Filimowskiego. Autorzy w niniejszej pracy zastawiają się na bazie kilku spraw z czasów II RP, czy wymieniona „ciężka obraza” przez twórcę poradnika i ogólna porada, aby „użyć broni przeciw obrażającemu” mogła dawać pozwolenie na zabicie osoby obrażającej w celu ochrony honoru oficerskiego czy to już byłoby zabójstwo?

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LOUISE MCCORMICK, A., and EDWARD S. MOCARSKI. "CYTOMEGALOVIRUS CONTROL OF CELL DEATH PATHWAYS." In From the Hallowed Halls of Herpesvirology. WORLD SCIENTIFIC, 2012. http://dx.doi.org/10.1142/9789814338998_0009.

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"Appendix A: Treating Cell Room Gaseous Effluent." In Hall-Héroult Centennial. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118788011.app1.

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Hall, John E., and Arthur C. Guyton. "The cell and general physiology." In Guyton and Hall Physiology Review. Elsevier, 2011. http://dx.doi.org/10.1016/b978-1-4160-5452-8.00010-x.

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Sarje, Abhinav, Jaroslaw Zola, and Srinivas Aluru. "Pairwise Computations on the Cell Processor." In Chapman & Hall/CRC Computational Science. CRC Press, 2010. http://dx.doi.org/10.1201/b10376-22.

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Conference papers on the topic "Haller cell"

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YILMAZ, Mehmet Serhat. "Resmi Belgeler Işığında Türkiye’de Ulaştırma Politikaları Üzerine Bir Değerlendirme (1946-1950)." In 10. Uluslararası Atatürk Kongresi. Atatürk Araştırma Merkezi Yayınları, 2024. http://dx.doi.org/10.51824/978-975-17-6043-2.29.

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Türkiye Cumhuriyeti erken döneminde yaşanan siyasî tecrübelerin ışığında 1946 yılından itibaren Türk siyasi tarihinde çok partili döneme geçilmiştir. Bildiride, Türk siyasi tarihinde çok partili döneme geçişle birlikte ekonomi alanında devletçilik ve müdahaleci politikalardan serbest politikalara geçiş süreci ve ulaştırma alanında getirdiği sonuçların ortaya konulması amaçlanmıştır. Bildiri, hükümet programları ve Cumhurbaşkanlığı Devlet Arşivleri Başkanlığı’nda bulunan Ulaştırma Bakanlığı'nın hükümet programında yer alan posta, telgraf, telefon, denizyolları, limanlar, havayolları, demiryolları konularında millî ekonomide özel teşebbüs ve sermayenin yeri hakkında teftiş ve çalışma raporlarının ışığında ele alınmıştır. Türkiye’de Cumhuriyet dönemi ekonomi politikaları incelendiğinde 1950-1960 yılları arası dönem dikkate değer. Bu dönem, müdahaleci bir iktisadi yapıdan özel teşebbüse öncelik veren bir ekonomi modeline geçiş çabalarının yoğunlaştığı dönemdir. Bu döneme geçiş süreci İkinci Dünya Savaşı’ndan sonra başlamış, liberalleşme eğilimi siyasi hayatta ve toplum üzerinde hızla etki uyandırmaya başlamıştır. Toprak Reformu Kanun Tasarısının görüşmeleri sırasında meclise dörtlü takrir adıyla bilinen bir önerge sunan Adnan Menderes, Celal Bayar, Fuat Köprülü ve Refik Koraltan’ın 7 Ocak 1946’da Demokrat Partiyi kurmaları bu sürecin hükümet programlarına girmesinin yolunu açmıştır. Sonuç olarak; Türkiye 1945 yılından sonra tek partili yönetimden çoğulcu demokrasiye geçmiştir. Bu süreçte Demokrat Parti toplumun desteğini kazanmaya başlamış, buna karşı Cumhuriyet Halk Partisi yönetimi dış politikada artan Sovyet tehdidinin de etkisiyle Batı Bloğuna yakınlaşmış, ekonomide devletçi uygulamalar yerini yavaş yavaş özel sektörün ön plana çıktığı liberalizme bırakmıştır. Bu süreçte sanayileşmeden çok, tarımda makineleşme ve karayolu yapımı benimsenen ekonomi politikası olmuştur. 1946 yılı Recep Peker Hükümeti programında yol meselesinin esaslı bir iş olarak ele alınacağı, bu işi başarmak için demiryolu yapımında olduğu gibi ciddi ve programlı bir çalışmanın yapılacağı ifade edilmiştir. Demiryolları inşasına bütün hızıyla devam edileceği vurgusunun yanı sıra, demir ve denizyollarının tam verimli olabilmesi için liman işlerine de önem verilmeye çalışıldığı anlaşılmaktadır. Belgelere göre, demiryollarının memleket ihtiyacına tamamen cevap verebilmesi ve uzun harp yıllarında yıpranmış bulunan malzeme ve vasıta noksanlarının ikmali ve mevcudun tamiri suretiyle tam ve verimli bir hale getirilmesini sağlanmalıydı. Denizyollarının inhisar kanununun armatörler lehine tadili ve kredi imkânları sunulması suretiyle özel teşebbüs ve sermayeye dayanan deniz filosunun kalkınması sağlanacaktı. Savaş dolayısıyla kısıtlı olan deniz ticaretinin yaygınlaştırılması için kısıtların kaldırılacağı ve serbest gemiciliğin teşvik edileceği belirtilmiştir. Sonuçta liberal ekonomiye geçiş sürecinde meydana gelişen değişim ulaştırma politikasını da etkilemiş, Demokrat Parti iktidarına bu yönde alt yapı sağlanmıştır. Başlangıçta bütün ulaştırma hizmetlerinin dönemin şartları içinde politik olarak birlikte değerlendirilmesine karşın ulaşım sistemlerinde daha sonraki yıllarda karayolu ağırlıklı bir ulaşım politikasının izlendiği anlaşılmaktadır.

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2

Bentz, John C. "Fuel Cell Powered Electric Propulsion for HALE Aircraft." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-404.

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Electrical energy sources offer some interesting possibilies for aircraft propulsion. Of particular interest are electric propulsion systems developed for aircraft that are designed for high altitude, long endurance (HALE) missions. This class of aircraft would greatly benefit from an aircraft propulsion system which minimizes thermal energy rejection and environmental pollutants. Electric propulsion systems may prove viable for the HALE mission, if reliable energy sources can be developed that are both fuel and weight efficient. Fuel cells are a possible energy source. This paper discusses the thermodynamic cyclic analysis of a fuel cell powered electric propulsion system. In particular, phosphoric acid and polymer electrolyte fuel cells are evaluated as possible energy sources.

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3

LaGrange, Jay W., and William F. Smith. "Non Flow-Through (NFT), Advanced Product Water Removal (APWR), Low Temperature PEM Fuel Cell With Reduced Balance of Plant for Air-Independent Applications." In ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2016 Power Conference and the ASME 2016 10th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fuelcell2016-59322.

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Recent developments in applications such as Pulsed Power, Space, High Altitude Long Endurance (HALE) aircraft and underwater vehicles have created interest in the application of air-independent fuel cells. The attraction for such systems has been the potential for high performance, long life and high energy density allowing for extended mission operations and simple recharge. A limitation of such systems, to date, has been the relatively complicated balance of plant required for system operation. This typically requires circulation of one or both reactants to remove product water and distribute reactants. These parasitic systems can reduce the overall efficiency and maintainability of the system, create noise and inhibit or prevent certain missions. Under the sponsorship of the NASA Glenn Research Center Infinity has developed a Non Flow-Through (NFT) Advanced Product Water Removal (APWR) Proton Exchange Membrane Fuel Cell system. The design eliminates the need to actively circulate reactants and can remove water directly from the reaction site within the cell. This low temperature, compact, lightweight technology projects to a system with the operational simplicity and reliability of a battery but with the performance and recharge capability of fuel cells. This paper will report on the operational characteristics, performance and benefits of Infinity’s APWR fuel cell. An update on development status and recent testing results will be included.

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4

Su, Cheng-Shuai, Haochun Zhang, Zan-En Dai, Kossi-Aniya Amedome Min-Dianey, and Yaning Zhang. "INFLUENCE OF POROSITY ON SPHERICAL HALLOW ALUMINUM ELEMENT CELL SCATTERING AND ASORPTION CHARATERISTISC." In Second Thermal and Fluids Engineering Conference. Begellhouse, 2017. http://dx.doi.org/10.1615/tfec2017.prm.017740.

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5

ZHU, MIAO. "STUDY OF CPT IN A VAPOR CELL WITH OPTICAL PHASE LOCKED DIODE LASERS." In In Honor of John Hall on the Occasion of His 70th Birthday - The John Hall Symposium. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812773845_0030.

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6

Bian, Shiyao, Ying Zheng, Shuichi Takayama, and James B. Grotberg. "Micro-PIV Measurements of an Airway Closure Model." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206831.

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A thin liquid layer coating the airway can be unstable and forms a plug. Airway closure usually happens at the small airways near the end of expiration, often accompanied with hypersecretion or/and surfactant deficiency in the airway in a variety of lung diseases, such as chronic obstructive pulmonary disease (COPD) and acute respiratory distress syndrome (ARDS). Modeling work by Halpern and Grotberg [1] has shown that several forces could contribute to airway closure, such as the surface tension instability and the wall compliance. Experiments in a capillary tube were conducted by Cassidy et al. [2] who found that adding surfactant increased the airway closure time and the critical film thickness. In vitro studies [3] [4] illustrated that exposure of primary human airway epithelial cells to plug propagation and rupture led to significant cell injury. Experimental studies [5] [6] on excised lungs or in vivo animal models have shown that severe tissue damage was found in surfactant-deficient lungs due to the repetitive airway reopening. However, mechanical forces induced by airway closure have not been experimentally evaluated.

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7

DUCLOY, M., and D. BLOCH. "SPECTROSCOPY IN EXTREMELY THIN VAPOR CELLS: SENSITIVITY ISSUES." In In Honor of John Hall on the Occasion of His 70th Birthday - The John Hall Symposium. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812773845_0021.

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8

Herschbein, Steven B., Hyoung H. Kang, Scott L. Jansen, and Andrew S. Dalton. "Manufacturing In-Line Whole Wafer Focused Ion Beam (FIB) Memory Address Descramble Verification." In ISTFA 2008. ASM International, 2008. http://dx.doi.org/10.31399/asm.cp.istfa2008p0128.

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Abstract Test engineers and failure analyst familiar with random access memory arrays have probably encountered the frustration of dealing with address descrambling. The resulting nonsequential internal bit cell counting scheme often means that the location of the failing cell under investigation is nowhere near where it is expected to be. A logical to physical algorithm for decoding the standard library block might have been provided with the design, but is it still correct now that the array has been halved and inverted to fit the available space in a new processor chip? Off-line labs have traditionally been tasked with array layout verification. In the past, hard and soft failures could be induced on the frontside of finished product, then bitmapped to see if the sites were in agreement. As density tightened, flip-chip FIB techniques to induce a pattern of hard fails on packaged devices came into practice. While the backside FIB edit method is effective, it is complex and expensive. The installation of an in-line Dual Beam FIB created new opportunities to move FA tasks out of the lab and into the FAB. Using a new edit procedure, selected wafers have an extensive pattern of defects 'written' directly into the memory array at an early process level. Bitmapping of the RAM blocks upon wafer completion is then used to verify correlation between the physical damaged cells and the logical sites called out in the test results. This early feedback in-line methodology has worked so well that it has almost entirely displaced the complex laboratory procedure of backside FIB memory array descramble verification.

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9

Sasmito, Agus Pulung, Tariq Shamim, Erik Birgersson, and Arun Sadashiv Mujumdar. "Numerical Investigation of Water and Temperature Distributions for Open-Cathode Polymer Electrolyte Fuel Cell Stack With Edge Cooling." In ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2013 Heat Transfer Summer Conference and the ASME 2013 7th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fuelcell2013-18262.

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Portable and motive applications of open-cathode polymer electrolyte fuel cells (PEFCs) require not only good stack performance but also a light and compact design. In this context, we explore how edge cooling with three different fin designs — one standard rectangular fin and two triangular fins that essentially halve the size of the fins — can improve the thermal and water envelopes inside the stack as well as stack performance whilst reducing the overall volume. The results suggest that all three edge-cooling designs give rise to lower and more uniform local temperature distributions as well as higher and more uniform hydration levels at the membrane in the stack compared to the conventional open-cathode PEFC without fins and design with additional air coolant plates. In addition, edge cooling design with one of the triangular fins yields the best performance (around 5% higher in term of power per unit catalyst area and power per unit weight; and ∼10% higher in term of power per unit volume as compared to other designs). Overall, the triangular fin design shows potential to be used in, for example, automotive applications due to its high performance as well as lightweight and compact design.

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Davies, T. A., D. Drotts, G. Weil, and E. R. Simons. "THROMBIN-INDUCED STIMULATION OF HUMAN PLATELETS LEADS TO AN INCREASE IN CYTOPLASMIC CALCIUM." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644471.

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Thrombin-induced stimulation of human platelets is accompanied by a dramatic increase in cytoplasmic calcium concentrations followed by a slow decrease. These changes are detected with indo 1. They are extremely rapid and are maximimal by 1015 seconds. Suspension studies, which reflect an average value over 3 × 107 cells/ml, indicate a thrombin dose-dependent increase in cytoplasmic calcium. However, flow cytometry indicates that subpopulations of cells are responding differently. The responses of these populations seem to be dependent on thrombin concentration. A maximal overall response is found when more than 50 % of the cells respond. This may explain multiple stimulations of the same suspension of cells at low thrombin dosesElevated extracellular Ca++ increases the maximal cytoplasmic response and significantly retards its subsequent decrease. When extracellular Ca++ is removed via addition of EGTA just before stimulation, the initial response is halved and the subsequent slow decrease is more marked and returns to lower (near-basal) levels. Intracellular Ca++ can be chelated with s - (0-am inophenoxy) - e thane-N, N, N',N'-tetraacet ic acid (BAPTA), which has a twofold greater affinity far Ca++ than does indo, but which does not fluoresce (at indo sensitive wavelengths) upon binding of Ca++. Cells loaded with both indo and BAPTA exhibit no rise in cytosolic Ca++ or altered membrane potential when stimulated with αthrombin, unlike cells loaded with indo alone. When Ca++ (2 mM) is added back to the extracellular buffer, these cells will take up the Ca++ at a constant rate as seen by a rise in indo fluorescence. When cytosolic Ca levels reach those of the resting platelets loaded with indo alone, these cells recover the αthrombin-indue ed Ca response of control platelets. However, they no longer depolarize partially under these same Ca++ replenished conditions. This implies that some of the Ca++ required for the platelet thrombin response comes from non-replenishable internal stores.

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Reports on the topic "Haller cell"

1

David Bell. Non Invasive estimation of aluminum concentration in Hall-Heroult reduction cells. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/828148.

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2

Brenden, B. B., N. C. Davis, O. H. Koski, et al. Inert Anode/Cathode Program: Fiscal Year 1986 annual report. [For Hall-Heroult cells]. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/6188306.

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3

Evans, J., and R. Shekhar. Physical modeling of bubble phenomena, electrolyte flow and mass transfer in simulated advanced Hall cells. Office of Scientific and Technical Information (OSTI), 1990. http://dx.doi.org/10.2172/6927204.

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4

Pool, K. H., J. L. Brimhall, P. J. Raney, and P. E. Hart. Evaluation of wear rates and mechanisms of titanium diboride-graphite composite materials proposed for use as cathodes in Hall-Heroult cells. Office of Scientific and Technical Information (OSTI), 1987. http://dx.doi.org/10.2172/6727518.

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