942 research outputs found
An ecophysiological study on the moss hydrogoniuh fontanum from the Asir mountains, Saudi Arabia
No full textThe thesis describes a study on the ecophysiology of the moss Hydrogonium fontanum (C. Mail.) Jaeg., the dominant plant at a waterfall in Saudi Arabia. The influence of environmental variables and water stress on the growth, stress metabolite accumulation and phosphatase activities of the moss was studied in laboratory axenic culture along with observations and experiments conducted in the field. The variables chosen for growth experiments were light flux, flooding, nutrient concentrations and water stress. For phosphatase activities, the influence of temperature, pH, ions, water stress were studied. Differences were found in phosphatase activities for rhlzoids, protonema and leafy shoots of the moss and, therefore, the phosphomonoesterase (PMEase) and phosphodiesterase (PDEase) activities of these fractions were also investigated. H. fontanum was originally collected from the tufa-depositing waterfall (Water chemistry - 44 mg 1(^-1) Na, 44 mg 1(^-1) Ca). High Na and Ca had significant positive effect on yield of the protonema under the laboratory conditions. Low light intensity (10 µmol photon m(^-2) s(^-1)) decreased the yield, but high light intensity (90 µmol photon m(^-2) s(^-1)) increased the yield of the protonema. The moss showed no response to water stress in respect to praline accumulation. Protein content decreased significantly over 48 h with increase in water stress. The Influence of water stress was greater in terms of dry weight and chlorophyll content changes in protonema than in leafy shoots. The protonema was capable of using various organic P substrates as sources of phosphorus and showed both PMEase and PDEase activities. PMEase and PDEase activities were detectable in all moss fractions (rhizoids, protonema, leafy shoots). Laboratory grown material showed higher activities than field grown material. Rhizoids produced the highest PMEase and PDEase activities among the moss fractions. Some leafy shoots collected from the field had low phosphorus content with high phosphatase activities, while others had high phosphorus content with low phosphatase activities. Changes in phosphatase activities in batch culture were studied in relation to growth rate. PMEase activity was first evident when cellular P was 1.15% with low activity (0.117 µmol pNP mg d. wt(^-1) h(^-1)) and PDEase appeared 4 days later when cellular P was 0.54%. The activities increased up to day 12 after which the activities maintained this level. The optimum temperatures, measured over a period of 1 h, for PMEase and PDEase activities were 60 ºC and 65 ºC with pH optima of 5.5-6.0 and 6.4-6.8, respectively. Of the six ions tested, Ca, Zn and P had significant inhibitory effects on the activities at the highest concentration used (10 mM).Drying the moss decreases PMEase and PDEase activities by about 23% and 21% (5-d) and 3.7 and 2,8 times (3 months), respectively. Water stress (PEG treatment) also reduced significantly the activities of PMEase and PDEase with a greater effect on the activity of the latter. A brief comparison in PMEase activity using two different substrates p- nitrophenyl phosphate (pNPP) and 4-methylumbelliferyl phosphate (4-MUP) was made to investigate the pH optima and time course. PMEase activity measured using 250 µM 4-MUP was about 60% of that measured using the same concentration of pNPP
Geographic profiling in Nazi Berlin: fact and fiction
No full textGeographic profiling uses the locations of connected crime sites to make inferences about the probable location of the offender’s ‘anchor point’ (usually a home, but sometimes a workplace). We show how the basic ideas of the method were used in a Gestapo investigation that formed the basis of a classic German novel about domestic resistance to the Nazis during the Second World War. We use modern techniques to re-analyse this case, and show that these successfully locate the Berlin home address of Otto and Elise Hampel, who had distributed hundreds of anti-Nazi postcards, after analysing just 34 of the 214 incidents that took place before their arrest. Our study provides the first empirical evidence to support the suggestion that analysis of minor terrorism-related acts such as graffiti and theft could be used to help locate terrorist bases before more serious incidents occur
Metal deposition pattern in Kumaon Hills (India) through active monitoring using moss Racomitrium crispulum
No full textBiomonitoring is a method of observing the impact of external factors
on ecosystems and their development over a long period. In this
research the level of Zn, Cu, Cd and Pb has been determined in samples
of the moss Racomitrium crispulum from the area of Almora, Nainital
and Pithoragarh of Kumaon hills. High metallic load was observed in
locations near proximity of higher traffic density area, which
integrated due to enhanced tourism during summer, followed by winter
and monsoon season; while in rural area high value of Zn, Cu and Cd
attributes to their use in fertilizers. Positive significant
correlations obtained between Pb-Zn and Zn-Cu suggest a common origin
of these metals. Elemental concentration in Racomitrium.crispulum was
in the order of Zn> Pb ~ Cu> Cd in summer, Zn> Cu > Pb >
Cd in winter season and Zn> Cu > Pb > Cd in monsoon which
reflect atmospheric trace elemental load. Bioaccumulation ability of
this moss was evaluated statistically using DMR test and
cartographically presented on contour maps obtained from SURFER
program
Metal deposition pattern in Kumaon Hills (India) through active monitoring using moss Racomitrium crispulum
No full textBiomonitoring is a method of observing the impact of external factors
on ecosystems and their development over a long period. In this
research the level of Zn, Cu, Cd and Pb has been determined in samples
of the moss Racomitrium crispulum from the area of Almora, Nainital
and Pithoragarh of Kumaon hills. High metallic load was observed in
locations near proximity of higher traffic density area, which
integrated due to enhanced tourism during summer, followed by winter
and monsoon season; while in rural area high value of Zn, Cu and Cd
attributes to their use in fertilizers. Positive significant
correlations obtained between Pb-Zn and Zn-Cu suggest a common origin
of these metals. Elemental concentration in Racomitrium.crispulum was
in the order of Zn> Pb ~ Cu> Cd in summer, Zn> Cu > Pb >
Cd in winter season and Zn> Cu > Pb > Cd in monsoon which
reflect atmospheric trace elemental load. Bioaccumulation ability of
this moss was evaluated statistically using DMR test and
cartographically presented on contour maps obtained from SURFER
program
Design drawing / Francis D.K. Ching with Steve Juroszek.
No full textIncludes index.Book fair 2013.viii, 408 p. :Get the completely revised edition to mastering the visual language of architecture. In his distinctive graphic style, world-renowned author and architecture educator Francis D.K. Ching takes us on another exciting journey through the process of creation. In Design Drawing, Second Edition, he unmasks the basic cognitive processes that drive visual perception and expression, incorporating observation, memory, and rendering into a creative whole. This edition unites imaginative vision with fundamental architectural principles to cover the traditional basics of drawing, including line, shape, tone, and space. Guiding the reader step-by-step through the entire drawing process, Design Drawing also examines different types of drawing techniques such as multiview, paraline, and perspective drawings -- and how they can be applied to achieve stunning results. In addition, this edition: -Goes beyond basic drawing books'Ching not only covers the principles, media, and techniques of drawing, but also places these within the context of what and why designers draw.-Features more than 1,500 hand-rendered drawings'beautiful illustrations that reinforce the concepts and lessons of each chapter.-Includes a supplemental CD-ROM'viewers will gain a greater appreciation of the techniques presented in this book through the power of animation, video, and 3D models. Twelve new modules are included, as is a video of the author demonstrating freehand techniques in a step-by-step manner. For professional architects, designers, fine artists, illustrators, teachers and students alike, this all-in-one package is both an effective tool and an outstanding value, demonstrating concepts and techniques in a visually stimulating format that transends comparable works in the field
BIO-BIBLIOMETRIC PROFILE OF DR. MADHUKAR GARAD
No full textThis paper presents bio-bibliometric profile of Dr.
Madhukar Garad through his contributions as author,
committee member, resource person, PhD Guide, etc.
in the field of Library and Information Science. The
data for this study was collected through his resume
as well as google search. The analysis includes journal
preferences for his publication, papers presented by
him in various conferences and seminars; collaboration
for publications; analysis of publications by document
types, etc. It was found that he has contributed to LIS
field not only through authoring papers for journals
and conferences but also by teaching and guiding LIS
professionals at undergraduate, post-graduate and
doctoral levels
In conversation with... Francis D.K. Ching
No full text[EN] Interview with Francis DK Ching. Frank Ching is a renowned author of over a dozen books addressing architectural forms and their analysis through drawing.He is a widely recognized author of books addressing architectural and design graphicsHe has taught at several universities in the United States as well as in Japan and Hong Kong. He is currently holds the Professor Emeritus at the University of Washington.He has received awards from prestigious organizations such as the American Institute of Architects and the Cooper-Hewitt National Design Awards.More recently, in 2013, he received the gold medal of the UID, in Matera , where we had the pleasure of meeting Frank Ching in person and invited him to this interview, which has now been published.At Matera, surrounded by his students, the professor drew the Sassi, illustrating in front of our eyes, what he has been doing for decades: using Drawing as a cognitive and creative tool. His way to approach arquitectural drawing has been a benchmark for many generations of graphic arts teachers. Currently he is still regularly sharing new drawings on his personal web page from which we can continually learn and enjoy.[ES] Entrevista con Francis D. K. Ching. Frank Ching es un reconocido autor de más de una docena de libros relativos a la enseñanza de la arquitectura y su análisis a través del dibujo. Fue docente en diversas Universidades en Estados Unidos desde 1972, así como en Japón (1990) y Hong Kong (1993). Actualmente posee el título de Profesor Emérito en la Universidad de Washington.Fue galardonado con premios de prestigiosas entidades como el American Institute of Architects o los Cooper-Hewitt National Design Awards. Más recientemente, en el 2013, recibió la medalla de oro del UID, en Matera, donde tuvimos el placer de conocerlo personalmente e invitarlo a esta entrevista ahora publicada.En Matera, rodeado de sus estudiantes, el Profesor, dibujaba los sassi, concretando delante de nuestros ojos, lo que desde décadas lleva haciendo: la divulgación del dibujo como herramienta cognitiva y creativa. Sus conceptos para abordar el dibujo arquitectónico, han sido una referencia para distintas generaciones de docentes del dibujo de arquitectura y actualmente sigue compartiendo regularmente en su página web personal, nuevos dibujos que nosotros continuamos asimilando y disfrutandoBarros Costa, H.; Hidalgo Delgado, F. (2015). Conversando con... Frank D.K. Ching. EGA. Revista de Expresión Gráfica Arquitectónica. 20(25):20-31. https://doi.org/10.4995/ega.2015.3708SWORD2031202
Designing for rehabilitation at home
No full textNew technologies open up possibilities for designing interactive experiences that can engage and motivate post-stroke survivors to undertake what would otherwise be boring repetitive movements. In this paper we outline a few of the challenges we met as part of the cross-disciplinary Motivating Mobility project. These are: the extended ‘user’; autonomy and motivation; and early prototype studies
Soot and radiation modelling in buoyant fires
No full textThis study seeks to advance present modelling capabilities in respect of soot and thermal radiation emission from fires. Such developments are crucial to the improved estimate of the hazard potential of accidental fires.
Radiation calculation requires the prediction of temperature and the concentrations of all radiatively important species. In hydrocarbon combustion, the key species are carbon dioxide, water vapour, carbon monoxide and particulate soot. In large hydrocarbon fires the latter is usually the dominant radiator. The detailed prediction of the gaseous species in turbulent combustion has previously been shown to be successfully achieved using laminar flamelet modelling in the fast chemistry limit. Soot, however, is governed by relatively slow formation processes which as yet remain poorly understood.
The present study proposes a model for soot formation in turbulent non-premixed combustion which aims to address both the slow chemistry and turbulence interaction. In order to circumvent uncertainties in soot formation processes the model relies on empiricism, through the experimental investigation of a sooting laminar diffusion flame.
The soot formation model is used to predict soot levels in a jet diffusion flame. Subsequent comparison with experimental data suggests the satisfactory performance of the model, but highlights soot oxidation to be a more significant problem. This stems from uncertainties associated both with instantaneous soot oxidation rate and the highly intermittent nature of this process in turbulent non-premixed flames.
The soot formation model is also applied to the prediction of soot levels in a simulated buoyant methane fire, which supplement temperature and gaseous species predictions using a flamelet approach. Detailed predictions of spectrally resolved radiative intensity are then performed and compared with similarly detailed experimental data. The encouraging agreement with experiment allows the assessment of the effect of turbulence-radiation interaction. This is shown to be particularly important in buoyancy-driven fires and is most evident for the luminous radiation. This arises from the soot which is largely confined to narrow sheets that typically lie close to peak temperature zones. A strategy in which more representative soot-temperature correlations may be realised is also described
Rehabilitation of Disturbed Alpine Areas
No full textWildland RecreationThis report is intended to provide interested persons with an understanding of the environmental problems currently being experienced in alpine areas, why these problems are happening, and what can be done to rehabilitate areas which have been disturbed
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