5,604 research outputs found
A direct A.C. to A.C. regenerative frequency and voltage converter
No full textIncludes bibliographical references.The reliable variable speed operation of an a. c. machine over a wide speed range is a problem that has received attention for some time. In this thesis a system to permit such operation from a fixed frequency fixed voltage supply is proposed, under the name of the asynchronous modulation converter. This converter is of the cycloconverter family, but is force-commutated and is not synchronised with the supply frequency. The power switching element comprises a power transistor in a diode bridge, coupled to the control circuitry by opto-isolators. The output of the a-mod converter is produced by a "chopper" modulation process and this results in the harmonics present being at frequencies well removed from the fundamental. A feedback system to ensure smooth commutation of the output current from the power switches is described. This feedback system operates by sensing the rate of rise of the inductive voltage surge on the load when a switch is opened to operate a freewheel path switch
Reflections on relationship-building between tangata whenua and local government: Notes from research and practice
No full textIn this paper, the author takes a reflective look at two areas: the preliminary discussions and fieldwork they undertook to set up a collaborative doctoral research project exploring relationship-building between
tangata whenua and local government (regional and district councils); and their
practice as a community psychologist within local government, advising on social
research and community participation in a number of environmental management
projects
Hamilton Stewart Nephroplasty
No full textIn 1947, Hamilton Stewart described a method of dealing with those patients with hydronephrosis in whom lower polar vessels were a factor in the ureteropelvic obstruction. Subsequent reports in the British literature indicated that other surgeons accepted the procedure. The operation has been almost completely disregarded in North America. We present our experience with the Hamilton Stewart nephroplasty because, in selected, cases, it fulfills the ideals of surgery in the relief of obstruction at the ureteropelvic junction associated with lower polar vessels
Hamilton Stewart Nephroplasty
No full textIn 1947, Hamilton Stewart described a method of dealing with those patients with hydronephrosis in whom lower polar vessels were a factor in the ureteropelvic obstruction. Subsequent reports in the British literature indicated that other surgeons accepted the procedure. The operation has been almost completely disregarded in North America. We present our experience with the Hamilton Stewart nephroplasty because, in selected, cases, it fulfills the ideals of surgery in the relief of obstruction at the ureteropelvic junction associated with lower polar vessels
Hamilton Park, Waterbury, Conn.
No full textA postcard featuring a lakeside in Hamilton Park, Waterbury, Connecticut, circa 1901-1906. The message reads: "Mrs F. am gowing away so dont show up untill I write Mrs Reed Has been to the Hospital in Halifax near died will send more news need +(?) time Regards to (???. ???)" Postmark date: October 2, 1907; Message included
A feather, not a gavel ::working towards aboriginal justice /
No full textIt would be difficult to find anyone more suited to bridge the gap between Aboriginal and white perspectives of Canada's justice system than Hon. A.C. Hamilton. A former associate chief justice of Manitoba's Court of Queen's Bench and co-chair of the Aboriginal Justice Inquiry, Judge Hamilton brings decades of compassionate experience to this critically important issue. Interweaving personal stories from his many years as a lawyer and judge with concrete recommendations for reform, Hamilton provides a sensitive blueprint for overhauling a system which is a clear failure for everyone involved. A feather, Not a Gavel is must reading for anyone who appreciates the need for change on this fundamental issue of "justice for all." -- from back cover
Zane Grey with Orange A.C. baseball team
No full textThis photograph shows Ohio native Zane Grey with the Orange A.C. Baseball Team, ca. 1896-1904. Prior to becoming a well-known author of western novels, Zane Grey was also a dentist and a semi-professional baseball player, with teams including the Orange Athletic Club and the Newark (New Jersey) Colts
Augmentative transcranial magnetic stimulation (TMS) combined with brain navigation in drug-resistant rapid cycling bipolar depression : a case report of acute and maintenance efficacy
No full textThe efficacy of transcranial magnetic stimulation (TMS) has been poorly investigated in the acute and maintenance treatment of bipolar depression. The present case supports the efficacy of low-frequency repetitive TMS (rTMS) of the right dorsolateral pre-frontal cortex (RDLPFC) combined to brain navigation in a drug-resistant, bipolar depressed subject with rapid cycling. While continuing the pharmacological treatment at stable doses, the patient was stimulated for 3 weeks at 1 Hz, 110% of motor threshold, 300 stimuli/day showing a significant improvement on the Hamilton Depression Rating Scale (HDRS(21)), the Montgomery-Asberg Depression Rating Scale (MADRS) and the Clinical Global Impression, improvement scale (CGI-I) total scores. On completion of the 3-week rTMS, the patient was treated with periodic maintenance sessions of rTMS at the same parameters of acute phase for an additional 6 months, at the end of which the therapeutic gains were maintained according to rating scales scores. Larger controlled trials assessing the acute and maintenance efficacy of rTMS in bipolar depression are needed
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