50,816 research outputs found
Christiansen Filters for the Ultra-Violet
No full textGaydon and Minkoff have described a Christiansen filter designed to isolate the 2537 A. resonance line of mercury. We have been working for some time upon the general problem of the design of Christiansen filters for the isolation of various spark and discharge tube lines to be used in ultra-violet microscopy. We have amplified the work of Kohn and von Fragstein, and developed a series of filters employing benzene—alcohol mixtures with fused quartz chips, which can span the region 3000–4000 A
The construction of Karen Karnak: The multi-author-function
No full textThis thesis is situated within the comparatively recent developments of Web 2.0 and the emergence of interactive WikiMedia, and explores the mode of authorship within a Read/Write culture compared to that of a Read/Only tradition. The hypothesis of this study is that the role of the audience has become merged with the author, and as such, represents new functions and attributes, distinct from a more conventional concept of authorship, in which the roles of audience and author are more separate. Read/Write and participatory culture, as defined by this study, is focused on collaboration, and includes the influences of D.I.Y. culture, Open-Source practices and the production of text by multiple authors. Multi-authorship presents a re-thinking of several concepts which support the notion of the individual author, since the focus of multi-authorship is not on attribution and ownership of a finished text, but on the continued malleability of a text. Modes of multi-authorship, demonstrated in the use of the pseudonyms Alan Smithee and Karen Eliot, represent declarative authors whose names signify multiple origins, whilst concurrently indicating a distinct body of work. The function of these names form an important context to this study, since primary research involves the construction of an experimental mode of multi-authorship utilising WikiMedia technology and the interaction of thirty nine participants, who are invited to create a body of work under the collective pseudonym Karen Karnak. The data generated by this experiment is analysed using aspects of Michel Foucault's author-function to identify and determine power structures inherent in the WikiMedia context. The interplay of power structures, including concepts such as identity, ownership and the body of work, affect the resulting mode of authorship and contribute to the construction of Karen Karnak, suggesting further areas of research into the emerging multi-author
sj-docx-2-dhj-10.1177_20552076241241231 - Supplemental material for The use of a digital life story to support person-centred care of older adults with dementia: A scoping review
No full textSupplemental material, sj-docx-2-dhj-10.1177_20552076241241231 for The use of a digital life story to support person-centred care of older adults with dementia: A scoping review by Helén Dellkvist, Ana Luiza Dallora, Line Christiansen and Lisa Skär in DIGITAL HEALTH</p
sj-docx-3-dhj-10.1177_20552076241241231 - Supplemental material for The use of a digital life story to support person-centred care of older adults with dementia: A scoping review
No full textSupplemental material, sj-docx-3-dhj-10.1177_20552076241241231 for The use of a digital life story to support person-centred care of older adults with dementia: A scoping review by Helén Dellkvist, Ana Luiza Dallora, Line Christiansen and Lisa Skär in DIGITAL HEALTH</p
sj-docx-1-dhj-10.1177_20552076241241231 - Supplemental material for The use of a digital life story to support person-centred care of older adults with dementia: A scoping review
No full textSupplemental material, sj-docx-1-dhj-10.1177_20552076241241231 for The use of a digital life story to support person-centred care of older adults with dementia: A scoping review by Helén Dellkvist, Ana Luiza Dallora, Line Christiansen and Lisa Skär in DIGITAL HEALTH</p
Responding to lethal violence: RCMP use of deadly force
No full textNot peer reviewedContemporary police officers face the challenge of intervening in community crises while maintaining public and personal safety. Unfortunately, this sometimes includes precarious life and death encounters which require using deadly force.police; RCMP; use of force; deadly force; mental illness; crisis interventio
Phylolestes ethelae Christiansen, 1947, new species
No full textPhylolestes ethelae, new species Synlestine in appearance with moderately slender body; coloration metallic green, bronze and black. MALE.Fore wing 38 mm.; hind wing 36 mm. Head (across eyes) 7 ram. Thorax plus prothorax 9.5 ram. Abdomen, including the abdominal appendages, 56 ram. Greatest diameter abdominal segment 2 (excluding appendages) 2 ram., of segment 6, 1 ram., and of segment 9, 1.8 ram. Abdominal appendages 2 ram. long. Hind femur 6 ram., hind tibia 6 ram., mesothoracic femur 4.5 mm., mesothoracic tibia 5 ram., prothoracic femur 4 ram., prothoracic tibia 5 mm. Head.Labium obscure yellow, darker at its forward edge and cleft for more than] its entire length. Labrum shiny black. Gene and postgenm yellow. Anteclypeus dull yellow, postclypeus metallic green. Frons and vertex metallic green. 0celli black. Occiput bronzy. Eyes (in dried specimens) brown. Basal segment of antennm with pale ring around distal half, remainder of antennm black. Rear of head black with metallic green reflections. Measurements for thorax plus prothorax taken at greatest length from base of head to abdominal segment 1 . Prothorax.Anterior lobe dull brown edged with:ellow. Lateral lobes dull yellow along inferior edges. Remainder of lateral lobes and the middle lobe dull bronze. Posterior lobe ridged and slightly curved along posterior margin. Posterior margin with a central roughly lunate depressed area. Color of posterior lobe dull bronze. Mesostigmal laminm terminate on both sides at the anterior end of the humeral suture in a low barely acute angled lobe. Thorax.Mesepisternum black with metallic green reflections, an indistinct brown stripe originating at the humeral suture above and curving inward and down to the collar. A narrow yellow stripe along the humeral suture running from the mesinfrmpisternum almost to the wing bases. Mesepimeron with small triangular yellow spot inferiorly tangent with mesepisternal yellow stripe. Remainder of mesepimeron brown with metallic green reflections rearward with the brown narrowing inferiorly. Metepisternum with a yellow hairline along 1 st lateral suture bordered by brown. A yellow stripe extends along the second lateral suture. The remainder of the thorax is dull brown fading to yellow posteriorly. AnteaIar sinus black. Wings.Postnodals in fore wing 18?, hind wings 1616; R3 arises five and onehalf crossveins distad of subnodus in fore wing and four to four and onehalf in the hind wings. Stigma somewhat trapezoidal and three times as long as broad; proximal vein strongly angulate. The stigma covers two cells with brace vein slightly distad of the proximal end of the stigma. Legs. Coxm yellow, femora and tibim light brown darkening towards the joints. Tarsi and claws black. Claws with a definite basal tooth. Spines short and stout on the femora; a little longer than the intervening spaces on the base of the tibia, decreasing in length toward the tarsi. Abdomen.The dorsum of segment one yellow basally, the remainder of the dorsum black with metallic green reflections, decreasing posteriorly. Ventrum obscure yellow. Anterior genital hamules roughly rhomboidal, yellow with black posterior edges. Superior abdominal appendages black, forcipate and simple, without any prominent spines or teeth. Inferiors rudimentary, consisting of small semicircular plates, dark brown in color. FEMALE.Length of fore wing 41 ram., hind wing 39 mm. abdomen 46 mm. long and somewhat stouter than that of the male. Other measurements as in holotype. Head.As in holotype. Prothorax.Similar to the holotype except that the middle lobe is irregularly edged with black and the lateral lobes are inferiorly pruinose. Thorax, antealar sinus, and mesostigmal laminm as in holotype. Wngs.Similar to holotype except as follows, stigma covers three cells in the fore wing and is not so strongly trapezoidal, with the proximal vein being more nearly parallel to the distal vein. Brace vein is in line with the proximal bordering vein. Stigma three times as long as. Right fore wing of holotype s missing broad. Postnodal crossveins, fore wings, 1918; hind wings, 1515. Abdomen.Brown with metallic green reflections, blackening towards the terminal segments. Genital valves deeply serrate with the serrations recurved and increasing in size posteriorly. Ovipositor small and completely hidden by the valves. Holotype male, allotype female, 1 broken teneral male and 1 female paratypes, vicinity of La Visite, Laselle Mts., HAITI, 4,000 ft. (Marston Bates). Museum of Com- parative Zoology, No. 27733. Not included in the type series is another male from the neighboring La Hotte range of Southern Haiti. This specimen has several differences from the Laselle specimens; however, the penis of the La Hotte specimen was badly damaged and in the portions remaining no differences were detected between it and the holotype. The observed variance between the other features is as follows tIolotype Length 69 ram. Fore wing 33 mm. long Hind wing 38 mm. long La Hotte male Length 58 ram. Fore wing 36 mm. long Hind wing 34 mm. long Postnodal crossveins Fore wing 18? Fore wing 1918 Hind wing 1616 Hind wing 14 thoracic and abdominal markings are similar, but the metallic green is more pronounced in the La Hotte specimen, and the brown colors on the thorax of the holotype become metallic bronze on the La Hotte male. The abdominal appendages are similar except for a small knob on the dorsointerior surface which appears only in the La Hotte specimen. 14.. The The poor condition of the La Hotte specimen and the small amount of available material make it impossible to say whether this La Hotte male represents another species of the new genus or only the normal variation for a species living in highly isolated areas.Published as part of Christiansen, K. A., 1947, A new genus and species of damselfly from southern Haiti (Odonata), pp. 256-262 in Psyche 54 on pages 258-261, DOI: 10.5281/zenodo.324135
Tagging of Biomedical Articles on CiteULike: A Comparison of User, Author and Professional Indexing
No full textThis paper examines the context of online indexing from the viewpoint of three different groups: users, authors, and professional indexers. User tags, author keywords and descriptors were collected from academic journal articles, which were both indexed in Pubmed and tagged on CiteULike, and analysed. Descriptive statistics, informetric measures, and thesaural term comparison shows that there are important differences in the use of keywords between the three groups in addition to similarities which can be used to enhance support for search and browse. While tags and author keywords were found that matched descriptors exactly, other terms which did not match but provided important expansion to the indexing lexicon were found. These additional terms could be used to enhance support for searching and browsing in article databases as well as to provide invaluable data for entry vocabulary and emergent terminology for regular updates to indexing systems. Additionally, the study suggests that tags support organisation by association to task, projects and subject while making important connections to traditional systems which classify into subject categories
Boruya içten geçik (in-line) ve dıştan geçik (on-line) damlatıcılarda yapım farklılığı katsayısının sulama yeknesaklığına etkisi
No full textBu araştırmada, bazı Avrupa Ülkeleri, İsrail ve Türkiye'de üretimi yapılan farklı tip ve özellikteki boruya içten gecik (in-line) ve dıştan gecik (on-line) damlatıcıların yapım faklılıklarının sulama yeknesaklığına olan etkileri karşılaştırmalı olarak değerlendirilmiştir. Araştırma sonucunda; içten gecik damlatıcıların ortalama yapım farklılığı katsayısı (Cv) %2.89, damlama türdeşliği (EU) %96.43, Christiansen yeknesaklık katsayısı (Cu) %97.55 ye istatistiksel yeknesaklık katsayısı (Us) ise %96.97; dıştan gecik damlatıcılara ilişkin ortalama yapım farklılığı katsayısı (Cv) %8.47, damlama türdeşliği (EU) %89.73, Christiansen yeknesaklık katsayısı (Cu) %93.24 ve istatistiksel yeknesaklık katsayısı (Us) ise %91.54 olarak bulunmuştur
People management during change: Are Filipino expatriate line managers more successful than their Philippine-based counterparts in leading change?
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