170,473 research outputs found
Dunmore Hygrometer Sensor
No full textThis sensor was developed by Francis W. Dunmore of the National Bureau of Standards around 1938. It consists of a pair of noble metal wires wound on a plastic form. A solution containing lithium chloride is applied between the wires. The lithium chloride is hygroscopic and changes resistance with changes in relative humidity. The logarithm of the resistance varies approximately in proportion to the logarithm of the relative humidity. The advantages of the Dunmore sensor were the increased speed of response and its applicability to remote indication systems as in radiosonde units.24 x 5 x 10 c
From assimilation to biculturalism: Changing patterns in Maori-Pakeha relationships
No full textThis chapter examines the changing patterns of inter-ethnic relationships among Maori and Pakeha in New Zealand, specifically the moves from assimilation towards biculturalism. The impact of recent debate about the Treaty of Waitangi is described and examples of bicultural policies and their consequences are outlined
Portrait of Rev. John Dunmore Lang [picture] .
No full textCondition: Good.; Title from inscription on reverse.; Inscriptions: "Rev. John Dunmore Lang, Scots Church, Sydney, c. 187-" --In pencil on reverse.Portrait of Reverend John Dunmore Lan
A resistance-humidity relationship for sensors of the Dunmore type
No full textConventional methods of graphical presentation of resistance-humidity characteristics for commercial sensors of the Dunmore type have some shortcomings in regard to the interpolation of experimental observations. This paper suggests a method by which calibration data can be represented by a linear relationship which is believed to simplify greatly both the construction of calibration curves and the application of these data in practice.Les m\ue9thodes conventionnelles de la pr\ue9sentation graphique des caract\ue9ristiques r\ue9sistance-humidit\ue9 pour les d\ue9tecteurs commerciaux du type Dunmore pr\ue9sentent quelques difficult\ue9s en ce qui concerne l'interpolation des observations experimentales. Cette \ue9tude sugg\ue8re une m\ue9thode gr\ue2ce \ue0 laquelle les donn\ue9es de calibrag, peuvent \ueatre repr\ue9sent\ue9es par une relation lin\ue9aire que l'on croit simplifier grandement \ue0 la fois l'\ue9tablissement des courbes de calibrage et l'application pratique de ces donn\ue9es.Peer reviewed: NoNRC publication: Ye
A study of the accuracy of Dunmore type humidity sensors
No full textThis paper describes an investigation of some of the characteristics of commercially available Dunmore-type humidity sensors in the temperature range from 0 to 70F, with particular reference to their application in research work where accuracies greater than those guaranteed by the manufacturer are required. A two-temperature recirculating-type atmosphere producer was used as a calibration standard in these studies.On d\ue9crit dans cette \ue9tude une enqu\ueate effectu\ue9e au sujet de quelques-unes des caract\ue9ristiques des d\ue9tecteurs d'humidit\ue9 de type Dunmore que l'on peut se procurer dans le commerce et dont l'intervalle des temp\ue9ratures va de 0 \ue0 70F. Cette enqu\ueate avait particuli\ue8rement pour but d'\ue9valuer l'utilisation de ces d\ue9tecteurs dans des travaux de recherche o\uf9la pr\ue9cision doit \ueatre plus grande que celle garantie par le fabricant. On s'est servi dans ces \ue9tudes, comme norme de calibrage, d'un producteur d'atmosph\ue8re \ue0 deux temp\ue9ratures du type recirculateur.Peer reviewed: NoNRC publication: Ye
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Bilingual life after school? Language use, ideologies and attitudes among Gaelic-medium educated adults
No full textGaelic-medium education (GME) as it exists today started in 1985, when two classes
offering instruction through the medium of Gaelic opened within primary schools in
Glasgow and Inverness. GME grew rapidly throughout the first decade of its
availability, and 1258 students were enrolled in the system by 1995. This thesis
examines outcomes of this system in terms of the degree to which former pupils who
started in GME during this period continue to use Gaelic in their daily lives, and
provides an assessment of their language ideologies and attitudes. The 2011 census
showed a diminution in the decline of Gaelic speakers in Scotland, but marginal
growth of 0.1% was recorded in the number of speakers under the age of 20. Whilst
this growth has been understood by politicians and policy-makers as evidence of the
role of GME in revitalising the language, the census figures give a limited picture of
the actual language practices of reported speakers, the extent to which they use
Gaelic, or of their beliefs, feelings and attitudes regarding the language.
Internationally, little research appears to have been done on the life trajectories of
adults who received a bilingual education through a minority language; that is to say,
on the effect that the bilingual classroom has on such individuals’ relationship to the
language after formal schooling is completed. The first students to receive GME at
primary school are now in their late 20s and early 30s, and prospects for the
maintenance and intergenerational transmission of Gaelic by this group are currently
unknown. The principal research questions of this investigation comprise the
following:
- What role does Gaelic play in the day-to-day lives of former Gaelic-medium
students who started in GME during the first decade of its availability; how
and when do they use the language?
- What sets of beliefs and language ideologies do these Gaelic-medium
educated adults express in relation to Gaelic?
- How do these beliefs and ideologies relate to their actual language practices,
to their attitudes concerning the language, and to future prospects for the
maintenance of Gaelic?
Through a combination of qualitative and quantitative research methods, I provide an
assessment of Gaelic use, language ideologies and attitudes among a sample of 130
Gaelic-medium educated adults. A thematic, ethnography of speaking methodology
is employed to analyse qualitative data from semi-structured interviews with 46
informants. Additionally, responses to an electronic questionnaire are evaluated by
statistical analysis using Spearman’s rank order correlation co-efficient to investigate
the relationships between non-parametric variables of reported language use, ability,
socialisation and attitudes. The results are discussed with reference to extensive
research literatures on language, culture and identity, language revitalisation in the
international context, and the perceived limitations of GME which have previously
been identified with regard to the revitalisation of Gaelic
An application of the Dunmore electric hygrometer to humidity measurement at low temperatures
No full textThe limited range of individual humidity sensors of the Dunmore type and their decreased speed of response at low temperatures tend to restrict their use as direct humidity measuring devices in some applications. Under certain circumstances a considerable increase in range and improvement in sensitivity may be possible with sensors of a lower humidity range by raising the temperature of the air being sampled. This paper discusses a method employing this principle that has specific application to the measurement of atmospheric humidity under low temperature winter conditions.Le rayon d'action limit\ue9 des d\ue9tecteurs individuels d'humidit\ue9 du type Dunmore et leur vitease r\ue9duite de r\ue9action aux basses temp\ue9ratures tendent \ue0 restreindre leur emploi comme dispositifs de mesure directe de l'humidit\ue9 dans certaines applications. Dans certaines conditions une augmentation consid\ue9rable du rayon d'action et une am\ue9lioration de la sensibilit\ue9 peuvent \ueatre possibles avec des d\ue9tecteurs ayant un rayon d'action plus faible, en \ue9levant la temp\ue9rature de l'air que l'on \ue9chantillonne. On d\ue9crit dans cette \ue9tude une m\ue9thode faisant appel \ue0 ce principe laquelle a une application sp\ue9cifique pour la mesure de l'humidit\ue9 atmosph\ue9rique dans les conditions de bases temp\ue9rature de l'hiver.Peer reviewed: NoNRC publication: Ye
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