4,086 research outputs found
Liver retraction system by C3-muco-adhesive polymer films for laparoscopic surgery
No full textBackground: Conventional laparoscopic instruments used for retraction may cause trauma at the retraction site. Alternative retraction/lifting especially of heavy solid organs such as the liver may be obtained by other means. The present study was designed to explore the use of C3-muco-adhesive polymers (C3-MAPs), which exhibit strong binding to the liver shortly after application to the organ and which retain strong adhesion for sufficient time, to enable sustained retraction during laparoscopic operations.Methods and materials: C3-muco-adhesive polymers were produced specifically for the study. In an ex vivo experimental set-up, discs of C3-MAPs were placed on the surface of porcine livers for adhesion and retraction studies involving objective measurements by tensiometry.Results: Experiments were carried out on 14 porcine livers. The force required to detach the C3-MAPs from the liver exceeded 2.0 N 30 s after application. The adhesion force by C3-MAPs files was sufficient to enable sustained retraction force necessary for exposure of the gall bladder, which was achieved by a mean retraction force of 4.85 N (SD = 0.63). This was sustained for a mean of 130 min (range 17.0-240.0). In the adhesion studies, the forces at 30 s required to detach the polymer discs from the liver exceeded 20 N (upper limit of the load cells of the Instron). The duration of the adhesion enabled sustained optimal gall bladder exposure for periods ranging from 17 to 240 min, with a mean of 130 ± 91 min.Conclusions: The results of the present study demonstrate that the adhesion and retraction properties of the engineered C3-MAP films are sufficient to enable complete exposure of the gall bladder for a period exceeding 1 h, confirming their potential for atraumatic retraction in laparoscopic and other minimal-access surgical approaches.</p
Liver retraction system by C3-muco-adhesive polymer films for laparoscopic surgery
No full textBackground: Conventional laparoscopic instruments used for retraction may cause trauma at the retraction site. Alternative retraction/lifting especially of heavy solid organs such as the liver may be obtained by other means. The present study was designed to explore the use of C3-muco-adhesive polymers (C3-MAPs), which exhibit strong binding to the liver shortly after application to the organ and which retain strong adhesion for sufficient time, to enable sustained retraction during laparoscopic operations.Methods and materials: C3-muco-adhesive polymers were produced specifically for the study. In an ex vivo experimental set-up, discs of C3-MAPs were placed on the surface of porcine livers for adhesion and retraction studies involving objective measurements by tensiometry.Results: Experiments were carried out on 14 porcine livers. The force required to detach the C3-MAPs from the liver exceeded 2.0 N 30 s after application. The adhesion force by C3-MAPs files was sufficient to enable sustained retraction force necessary for exposure of the gall bladder, which was achieved by a mean retraction force of 4.85 N (SD = 0.63). This was sustained for a mean of 130 min (range 17.0-240.0). In the adhesion studies, the forces at 30 s required to detach the polymer discs from the liver exceeded 20 N (upper limit of the load cells of the Instron). The duration of the adhesion enabled sustained optimal gall bladder exposure for periods ranging from 17 to 240 min, with a mean of 130 ± 91 min.Conclusions: The results of the present study demonstrate that the adhesion and retraction properties of the engineered C3-MAP films are sufficient to enable complete exposure of the gall bladder for a period exceeding 1 h, confirming their potential for atraumatic retraction in laparoscopic and other minimal-access surgical approaches.</p
The television work of Alfred Hitchcock
No full textThe thesis uses close textual analysis to study and evaluate the television work of Alfred Hitchcock. The corpus consists of the twenty shows personally directed by Hitchcock, including his appearances before and after those shows. In response to most previous writing, which tends to compare the programmes with Hitchcock’s films (often unfairly) the thesis emphasises them as products of television. Programmes are evaluated on the basis of their perceived success as television- if they harness conditions related to television production and integrate them with narrative themes or to create meaning. Hitchcock is considered to be the major creative force in each programme.
Chapter One provides a variety of important contexts including a brief history of US television of the 1950s, key literature on Hitchcock and analyses of contemporaneous programmes not directed by Hitchcock. The textual analysis chapters (2-8) consider aesthetic or thematic programme aspects. Chapter Two studies the various roles played by Hitchcock’s appearances as series host. Chapter Three considers the impact of censorship on programmes frequently dealing with murder, violence and insanity. Chapter Four analyses Hitchcock’s implementation of varieties of voice-over narration, a common device in short dramatic forms. Chapter Five studies Hitchcock’s use of point-of-view shots, particularly in relation to their role in the delivery of the narrative twist. Chapter Six considers the key Hitchcock theme of detachment from the world. Chapter Seven looks at moments from the programmes which demonstrate how aesthetic is influenced by television production conditions.
Hitchcock created a number of television masterpieces. His achievements in television are in many ways comparable in quality and consistency to his theatrical films. Even when considered in the context of other 1950s US anthology dramas, the Hitchcock-directed programmes are superior on many levels. Elements of his film style were highly suited to television production. Many of his greatest achievements embrace and harness television production conditions in their presentation strategies to create an integration of style and meaning
Alfred Schirokauer Collection 1889-1932
No full textThe bulk of the collection consists of Alfred Schirokauer writings in form of manuscripts novels and shorter works, and newspaper serializations. There is also a small amount of correspondence with publishers, as well as a few personal items.See inventoryMrs. Hartman, 1978.Born in Breslau (now Wroclaw, Poland) on July 13, 1880, the author and lawyer Alfred Schirokauer lived in Berlin, immigrated to Austria in 1933, and died in Vienna on October 27, 1934.Finding aid available online3-page inventory.digitize
Letter to Alfred L. Shoemaker, February 10, 1948
No full textA handwritten letter from an unknown author addressed to Alfred L. Shoemaker, dated February 10, 1948. Within, the author discusses the Pennsylvania Dutch word for Ash Wednesday, along with traditions associated with this day.https://digitalcommons.ursinus.edu/shoemaker_documents/1118/thumbnail.jp
Map of British Columbia Reduced from the Original Map by Mr. Alfred Waddington
No full textby Alfred Waddington.Scale ca. [1:5,385,600] (W 132 00'--W 112 00'/N 57 40?--N 48 00'). Relief shown by hachures. Shows wagon roads, trails and explored routes
CTheory Live Interview: Taiaiake Alfred
No full textTaiaiake Alfred is a Kanien’kehaka (Mohawk) philosopher, writer and teacher and has emerged as an influential figure in the new generation of Indigenous leaders. Dr. Alfred holds a Canada Research Chair and is a Professor in the Indigenous Governance Programs and the Department of Political Science at the University of Victoria. He is the author of three books,Heeding the Voices of Our Ancestors, Peace, Power, Righteousness, and Wasase: Indigenous Pathways of Action and Freedom.Arthur Kroker, Canada Research Chair in Technology, Culture and TheoryFacultyUnreviewe
Alfred Stern : Wissenschaftliche Selbstbiographie.
No full textUniversity life in Goettingen and Heidelberg in second half of 19th century; travels; contains bibliography of author's publications.The historian Alfred Stern was born in Goettingen in 1846 to the mathematician Moriz Abraham Stern. He was a student of Waitz and Ranke and taught history in Berne and at the Technische Hochschule in Zurich. He was the author of a 10-volume work on European history. He died in Zurich in 1936.Brief summary in Max Kreutzberger: "Leo Baeck Institute New York, Bibliothek und Archiv; Katalog": C 39
Memorial to Mrs. Alfred Watt
No full textNote - Handwritten letter, memorial to Mrs. Alfred WattAlberta Women's Institute
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