bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparative study of flow condensation in conventional and small diameter tubes
Authors: Mikielewicz Dariusz , Andrzejczyk Rafał
Published: January 2013

Flow boiling and flow condensation are often regarded as two opposite or symmetrical phenomena. Their description however with a single correlation has yet to be suggested. In the case of flow boiling in minichannels there is mostly encountered the annular flow structure, where the bubble generation is not present. Similar picture holds for the case of inside tube condensation, where annular flow structure predominates. In such case the heat transfer coefficient is primarily dependent on the convective mechanism. In the paper a method developed earlier by the first author is applied to calculations of heat transfer coefficient for inside tube condensation. The method has been verified using experimental data from literature on several fluids in different microchannels and compared to three well established correlations for calculations of heat transfer coefficient in flow condensation. It clearly stems from the results presented here that the flow condensation can be modeled in terms of appropriately devised pressure drop.
Evaluation of dynamic microscopic advanced angle for droplet on flat surface
Authors: Zapałowicz Zbigniew
Published: January 2013

The paper presents a short description of the model of the phenomenon of droplet spreading in presence of a liquid film, as well as the experimental facility, calculations methodology and results of experimental research concerning determination of the boundary angle at which droplet begins to slide on the horizontal or inclined surface of the plate. Values of boundary angle have been applied to estimate the microscopic dynamic advanced angle of the droplet on the flat surface in presence of a liquid film.
Experimental determination of correlations for mean heat transfer coefficients in plate fin and tube heat exchangers
Authors: Taler Dawid
Published: January 2013

This paper presents a numerical method for determining heat transfer coefficients in cross-flow heat exchangers with extended heat exchange surfaces. Coefficients in the correlations defining heat transfer on the liquid- and air-side were determined using a nonlinear regression method. Correlation coefficients were determined from the condition that the sum of squared liquid and air temperature differences at the heat exchanger outlet, obtained by measurements and those calculated, achieved minimum. Minimum of the sum of the squares was found using the Levenberg-Marquardt method. The uncertainty in estimated parameters was determined using the error propagation rule by Gauss. The outlet temperature of the liquid and air leaving the heat exchanger was calculated using the analytical model of the heat exchanger.
Optimal boiling temperature for ORC installation
Authors: Mikielewicz Jarosław , Mikielewicz Dariusz
Published: January 2013

In the paper a research on cost-effective optimum design boiling temperature for Organic Rankine Cycle utilizing low-temperature heat sources is presented. The ratio of the heat exchanger area of the boiler to the power output is used as the objective function. Analytical relations for heat transfer area as well power of the cycle are formulated. Evaporation temperature and inlet temperature of the heat source medium as well its mass flow rate are varied in the optimization method. The optimization is carried out for three working fluids, i.e. R 134a, water and ethanol. The objective function (economics profitability, thermodynamic efficiency) leads to different optimal working conditions in terms of evaporating temperature. Maximum power generation in the near-critical conditions of subcritical ORC is the highest. The choice of the working fluid can greatly affect the objective function which is a measure of power plant cost. Ethanol exhibits a minimum objective function but not necessarily the maximum cycle efficiency.
Technology of oxygen production in the membranecryogenic air separation system for a 600 MW oxy-type pulverized bed boiler
Authors: Berdowska Sylwia , Skorek-Osikowska Anna
Published: January 2013

In this paper the results of the thermodynamic analysis of the oxy-combustion type pulverized bed boiler integrated with a hybrid, membrane- cryogenic oxygen separation installation are presented. For the calculations a 600 MW boiler with live steam parameters at 31.1 MPa /654.9 oC and reheated steam at 6.15 MPa/672.4 oC was chosen. In this paper the hybrid membrane-cryogenic technology as oxygen production unit for pulverized bed boiler was proposed. Such an installation consists of a membrane module and two cryogenic distillation columns. Models of these installations were built in the Aspen software. The energy intensity of the oxygen production process in the hybrid system was compared with the cryogenic technology. The analysis of the influence of membrane surface area on the energy intensity of the process of air separation as well as the influence of oxygen concentration at the inlet to the cryogenic installation on the energy intensity of a hybrid unit was performed.
Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation
Authors: Nowak Władysław , Borsukiewicz-Gozdur Aleksandra , Wiśniewski Sławomir
Published: January 2013

In the paper presented are definitions of specific indicators of power which characterize the operation of the organic Rankine cycle (ORC) plant. These quantities have been presented as function of evaporation temperature for selected working fluids of ORC installation. In the paper presented also is the procedure for selection of working fluid with the view of obtaining maximum power. In the procedure of selection of working fluid the mentioned above indicators are of primary importance. In order to obtain maximum power there ought to be selected such working fluids which evaporate close to critical conditions. The value of this indicator increases when evaporation enthalpy decreases and it is known that the latent heat of evaporation decreases with temperature and reaches a value of zero at the critical point.
Optimum heating of cylindrical pressure components weakened by holes
Authors: Dzierwa Piotr , Taler Jan
Published: January 2013

A method for determining time-optimum medium temperature changes is presented. The heating of the pressure elements will be conducted so that the circumferential stress caused by pressure and fluid temperature variations at the edge of the opening at the point of stress concentration, do not exceed the allowable value. In contrast to present standards, two points at the edge of the opening are taken into consideration. The first point, P1, is located at the cross section and the second, P2, at the longitudinal section of the vessel. It will be shown that the optimum temperature courses should be determined with respect to the total circumferential stress at the point P2, and not, as in the existing standards due to the stress at the point P1. Optimum fluid temperature changes are assumed in the form of simple time functions. For practical reasons the optimum temperature in the ramp form is preferred. It is possible to increase the fluid temperature stepwise at the beginning of the heating process and then increase the fluid temperature with the constant rate. Allowing stepwise fluid temperature increase at the beginning of heating ensures that the heating time of a thick-walled component is shorter than heating time resulting from the calculations according to EN 12952-3 European Standard.
Heat transfer through the regular polyhedrons with asymmetric boundary conditions
Authors: Pelińska-Olko Ewa
Published: January 2013

During heat transport through the walls of a hollow sphere, the heat stream can achieve extreme values. The same processes occur in regular polyhedrons. We can calculate the maximum heat transfer rate, the so-called critical heat transfer rate. We must assume here identical conditions of heat exchange on all internal and external walls of a regular polyhedron. The transfer rate of heat penetrating through the regular polyhedron with different heat transfer coefficients on the walls is called the heat transfer rate with asymmetric boundary conditions. We show that the heat transfer rate in this case will grow up if we replace those coefficients with their average values.
A new method for optimum heating of pressure components in supercritical steam power blocks
Authors: Rząsa Dariusz , Duda Piotr
Published: January 2013

One of the major concerns of the power energy industries is a proper operation of steam power blocks. Pressurized working medium and high temperature cause very high stresses in the construction elements such as collectors, separators or steam valves. They are exposed to sudden temperature and pressure changes that cause high stresses at certain points. Additionally, the cyclic character of loading causes material fatigue, known as low-cyclic fatigue, which may lead to the formation of fracture. Thus, methodologies offered by many companies should ensure reliable and safe operation of steam power blocks. The advanced numerical solutions for determining time-optimum medium temperature changes are presented. They are based on Levenberg-Marquardt and nonlinear programming by quadratic Lagrangian methods. The methods allow us to find parameters for start-up and shut-down operation that can reduce total stresses to limits governed by European regulations. Furthermore, the heating and cooling operations are conducted in a shortest time possible.
Eight species that rule today’s European Arctic fjord benthos
Authors: Węsławski Jan Marcin , Włodarska−Kowalczuk Maria , Kędra Monika , Legeżyńska Joanna , Kotwicki Lech
Published: January 2013

: The eight most abundant species (mean density >20 ind. m−2), which occurred at high frequencies (mean >30%) were selected from grab samples in the three Svalbard fjords: Hornsund, van Mijenfjord, and Kongsfjord, in the summer seasons between 1997 and 2007. Six polychaete and two bivalve species comprised more than 47% of the individ− uals and the biomass in all the samples examined. Four species are cosmopolitan, while the others are widely distributed Arctic−boreal species, and none has Arctic origin. Their den− sity, frequency of occurrence, and biology are very similar across the wide geographical range from boreal to Arctic conditions. As the diversity of benthic fauna in the fjords stud− ied increases (from 172 to 238 species), the dominance of the eight species in the soft bot− tom community diminishes from 76% to 47%. In times of hydrological regime shift, i.e., the warming of the European Arctic, it is unlikely that the abundancy of these species in the soft bottom fjordic ecosystems will change. The most common soft bottom species are not good indicators of environmental change in the Arctic, and rare, specialized species are better op− tion for indicative purposes.
Photosynthetic activity in three vascular species of Spitsbergen vegetation during summer season in response to microclimate
Authors: Barták Miloš , Váczi Peter , Hájek Josef
Published: January 2013

Diurnal measurements of photosynthetic processes, effective quantum yield of photosystem II (ΦPSII), photosynthetic electron transport rate (ETR) were done in three dominant species of Arctic tundra (Silene acaulis, Dryas octopetala, Salix polaris) in Petuniabukta, Spitsbergen. Daily courses of net photosynthesis (PN) were calculated from chlorophyll fluorescence data and daily photosynthesis evaluated. The short-term field measurements were carried out in summer 2009, and 2010. Fluorometric parameters (ΦPSII and ETR) weremeasured each 5 minutes as well as microclimate characteristics of the site for 10 (2009) and 8 days (2010), respectively. In all species photosynthetic ETR was well related to incident photosynthetically active radiation and leaf temperature. In general, D. octopetala exhibited slightly lower ETR than the other two species. Estimated maximum photosynthetic rate

(PNmax) reached 17.6, 21.4, and 22.9 μmol CO2 m-2 s-1 for S. polaris, S. acaulis, and D. octopetala, respectively. Daily photosynthesis reached comparable values in all species, D. otopetala, however, exhibited slightly lower values than the other two species both for overcast and fully sunny days (3.9 and 13.4 mmol CO2 m-2 d-1, respectively). The range of daily photosynthesis for S. polaris and S. acaulis studied, reached the ranges of 4.6-6.9 and 14.6-15.2 mmol CO2 m-2 d-1 for overcast and fully sunny day, respectively.
Impact of warming on Nostoc colonies (Cyanobacteria) in a wet hummock meadow, Spitsbergen
Authors: Elster Josef , Kvíderová Jana , Hájek Tomáš , Láska Kamil , Šimek Miloslav
Published: January 2013

In order to simulate the warming effects on Arctic wetlands, three passive open-top chambers (OTCs) and three control cage-like structures (CCSs) equipped with soil temperature and soil volumetric water content (VWC) probes for continuous micro- climatic measurements were installed in a wet hummock meadow, Petuniabukta, Bille- fjorden, central Spitsbergen, in 2009. The warming effects on primary productivity were investigated during summer seasons 2009 and 2010 in cyanobacterial colonies of Nostoccommune s.l., which plays an important role in the local carbon and nitrogen cycles. The microclimatic data indicated that the effect of OTCs was dependent on microtopography. During winter, two short-term snow-thaw episodes occurred, so that liquid water was available for the Nostoc communities. Because of the warming, the OTC hummock bases remained unfrozen three weeks longer in comparison to the CCSs and, in spring, the OTC hummock tops and bases exceeded 0°C several days earlier than CCS ones. Mean summer temperature differences were 1.6°C in OTC and CCS hummock tops, and 0.3°C in the OTC and CCS hummock bases. The hummock tops were drier than their bases; however the VWC difference between theOTCs and CCSs was small. Due to the onlyminor differences in the microclimate of OTC and CCS hummock bases, where the Nostoc colonies were located, no differences in ecophysiological characteristics of Nostoc colonies expressed as photochemistry parameters and nitrogenase activities were detected after two years exposition. Long-term monitoring of Nostoc ecophysiology in a manipulated environment is necessary for understanding their development under climate warming.
Selection of kinematic structure for portable machine tool
Authors: Nowak Monika , Jastrzębski Daniel
Published: January 2013

Selection of kinematic structure for portable machine tool

The article presents the problem of selecting kinematic structures for the proposed portable machine tool. Developed methodology of selection has been based on the detailed design requirements and elimination conditions formulated thanks to them. The paper describes the program developed to assist the process of selecting the kinematic structures for the portable machine tool and the results achieved.
Technological problems in machining of resilient wheelsets on wheel-turning lathes with friction drive
Authors: Filipowicz Krzysztof , Biedunkiewicz Witold , Królikowski Marcin , Grzesiak Dariusz
Published: January 2013

Technological problems in machining of resilient wheelsets on wheel-turning lathes with friction drive

Article presents attempt of identification of technological problems in machining of resilient wheelsets on wheel- turning lathes with friction drive. Main part of presented research was modelling of machined wheel using finite elements method in conditions of load with forces measured during machining of railway wheelsets. Presented research is a part of works performed in order to enable regeneration of tyre profiles of resilient wheelsets using wheel-turning lathes with friction drive, which are commonly used nowadays for machining heavy railway wheelsets.
The growth of Thermomyces lanuginosus (TSIKL.) isolates from garden composts and coffee beans on cellulose substrates and xylan at various water activity
Authors: Markowska-Szczupak Agata , Ulfig Krzysztof , Janda Katarzyna
Published: January 2013

The study was to determine the effect of water activity (0.850; 0.900; 0.950; 0.995; and 0.999 aw) on the growth of T. lanuginosus on solid media containing different cellulose substrates (crystalline cellulose, carboxymethyl cellulose - CMC, fi lter paper, and sawdust) and xylan. The growth of isolates from coffee beans and garden composts were compared. All isolates did not grow on media with aw < 0.950. On media with aw > 0.950, the hydrolysis zones were only observed on xylan and CMC. The highest daily growth and hydrolysis zone rates were mostly obtained at 0.995 aw and the lowest values were observed at 0.950 aw. The coffee beans isolates at 0.950 aw had the CMC hydrolysis coeffi cient 1.7-times higher than that for xylan. The fungal growth (FG) coeffi cient data indicate that the coffee beans isolates were able to utilize CMC and crystalline cellulose for growth and the highest growth rate was obtained at 0.999 aw. Subsequently, the compost isolates were able to grow on all substrates but the highest growth rate was obtained on CMC at 0.950 and 0.999 aw. Thus, coffee beans and composts provide T. lanuginosus isolates with various growth and hydrolytic zone rates in the range of 0.950−0.999 aw.
The knit on demand supply chain
Authors: Larsson Jonas , Peterson Joel , Mattila Heikki
Published: January 2013

The knit on demand supply chain

As customers’ tastes become more differentiated, so must companies’ offerings evolve. The demand for variety
may soon become unmanageable, and several companies are addressing this trend by adopting a system
of mass customization. One project, Knit on Demand, has been conducted by the Swedish School of Textiles in
close collaboration with a knitting company and a retailer of tailored fashion in Stockholm. Production and sales
of customized products pose logistical challenges for the companies involved, including the one-piece flow through
almost the entire supply chain and the demand for short lead times in an otherwise slow environment, adding
to the cost of manufacturing mass customized garments. Customization has logistical benefits such as minimised
inventory; hence, high inventory turnover and the possibility of fast response to meet customer demand. The Knit
on Demand concept can be considered as leagile because it comprises both lean and agile components. It is lean
in the manufacturing stage upstream and agile downstream to better respond to customer demand on the market.
Combined Statistical Analysis Method Assessing Fast Versus Slow Movement Training in a Patient With Cerebellar Stroke: A Single-Case Study
Authors: Deng Huiqiong , Kimberley Teresa J. , Durfee William K. , Dressler Brittany L. , Steil Carie , Carey James R.
Published: January 2013

Background

Gold standards of data analysis for single-case research do not currently exist.

Objective

The purpose of this study was to determine whether a combined statistical analysis method is more effective in assessing movement training effects in a patient with cerebellar stroke.

Design

A crossover single-case research design was conducted.

Methods

The patient was a 69-year-old man with a chronic cerebellar infarct who received two 5-week phases of finger tracking training at different movement rates. Changes were measured with the Box and Block Test, the Jebsen-Taylor test, the finger extension force test, and the corticospinal excitability test. Both visual analysis and statistical tests (including split-middle line method, t test, confidence interval, and effect size) were used to assess potential intervention effects.

Results

The results of the t tests were highly consistent with the confidence interval tests, but less consistent with the split-middle line method. Most results produced medium to large effect sizes.

Limitations

The possibility of an incomplete washout effect was a confounding factor in the current analyses.

Conclusions

The combined statistical analysis method may assist researchers in assessing intervention effects in single-case stroke rehabilitation studies.
The Meaning of Occupation, Occupational Need, and Occupational Therapy in a Military Context
Authors: Brown Helen Viola , Hollis Vivien
Published: January 2013

Despite occupational therapists having strong historical ties to the Canadian military, there are currently no uniformed occupational therapists and only a few permanent occupational therapists employed by Canadian Forces. Occupational therapy is provided, in the main, through civilian occupational therapists. Occupational therapists have unique skills that can contribute to the existing Canadian Forces Physical Medicine and Rehabilitation Services Department. To establish the depth and scope of their work, this article explains the theoretical underpinnings of occupational therapy. Examples are provided of possible occupational therapy for populations of Canadian Forces members: (1) those with transient, intermittent injuries; (2) those returning from overseas missions with very serious injuries or severe injuries; and (3) those with permanent injuries who are transitioning from the Canadian Forces into the civilian workforce. Interventions for mental health issues are interwoven with those targeting physical issues. The article suggests that occupational therapists employed on a permanent basis by the Canadian Forces can contribute in a more comprehensive manner to the wider rehabilitation of Canadian Forces members. The article has applicability to occupational therapy military services in other countries.
The science of cerebral ischemia and the quest for neuroprotection: navigating past failure to future success
Authors: Turner Ryan C. , Dodson Sean C. , Rosen Charles L. , Huber Jason D.
Published: January 2013

Ischemic stroke remains a leading cause of morbidity and death for which few therapeutic options are available. The development of neuroprotective agents, a once promising field of investigation, has failed to translate from bench to bedside successfully. This work reviews the ischemic cascade, agents targeting steps within the cascade, and potential reasons for lack of translation. Additional therapeutic targets are highlighted and areas requiring further investigation are discussed. It is clear that alternative targets need to be pursued, such as the role glia play in neurological injury and recovery, particularly the interactions between neurons, astrocytes, microglia, and the vasculature. Similarly, the biphasic nature of many signaling molecules such as matrix metalloproteinases and high-mobility group box 1 protein must be further investigated to elucidate periods of detrimental versus beneficial activity.
Ectopic extramedullary hematopoiesis: evaluation and treatment of a rare and benign paraspinal/epidural tumor
Authors: Mattei Tobias A. , Higgins Michael , Joseph Flynn , Mendel Ehud
Published: January 2013

Ectopic extramedullary hematopoiesis (EMH), defined as the formation of blood cells outside the bone marrow, usually occurs in a scenario of chronic anemia when, even after conversion of the bony yellow marrow to red marrow, the body is still unable to meet the demand for red blood cells. Ectopic extramedullary hematopoiesis most commonly occurs in the liver and spleen but may, in fact, occur almost anywhere in the body. Although previous reports have documented EMH presenting as paraspinal masses, such lesions have almost always been associated with a predisposing hematological disorder such as hemolytic anemia, myelofibrosis or myelodysplastic syndromes, thalassemia, polycythemia vera, leukemia, or lymphoma.

The authors of this report describe the first reported instance of EMH in a patient presenting with a symptomatic epidural and paraspinal cervical lesion arising from the posterior spinal elements and no known predisposing hematological disease. Initial radiographs revealed a bony lesion arising posteriorly from the C2–3 laminae and spinous processes. Subsequent imaging suggested the diagnosis, which was confirmed by CT-guided biopsy, peripheral blood smears, and bone marrow aspirate. Despite epidural compression and slight displacement of the cervical cord and thecal sac, the patient's symptoms were limited to pain and diminished cervical range of motion. Therefore, surgery was deferred in favor of nonsurgical therapy. Several alternative modalities for the treatment of EMH have been suggested in the literature, including cytotoxic agents and radiotherapy. The authors opted for an approach utilizing directed low-dose radiotherapy of a total of 25 Gy divided in 2.5-Gy fractions. At the 3-month follow-up, the patient continued to be asymptomatic, and MRI demonstrated a significant reduction in the dimensions of the lesion.

Extramedullary hematopoiesis with spinal cord compression in the absence of a preexisting hematological disorder has not been described in the context of clinical neurosurgical practice. Recognizing that EMH may present as an epidural or paraspinal lesion is important since chemotherapy and radiotherapy are effective therapeutic options in the majority of patients who suffer few if any symptoms. Extensive evaluation for underlying hematological disorders is necessary before undertaking directed therapy. Inadvertent resection of these highly vascularized masses may risk catastrophic intraoperative hemorrhage with no proven benefit as compared with medical treatment, which usually provides excellent long-term outcomes.
Efficacy of essential oils as jute seed protectant
Authors: Begum Jaripa , Anwar MN , Akhter N , Bhuiyan Md Nazrul Islam , Hoque MN
Published: January 2013

Essential oils obtained from the leaves of Eucalyptus citriodora, E. camaldulensis, and whole plants of Ocimum gratissimum and O. americanum were tested for their efficiency to protect seed of jute (var.D-154) from seed-borne fungal pathogens. A total of 9 fungi were detected. Among the 9 deteced seed borne pathogenic fungi, the highest percentage of fungal occurrence was recorded with Macrophomina phaseolina (37.71%). This was followed by Botryodiplodia theobromae (30.10%) and Colletotrichum corchori (19.72%). The jute seeds dressed with the oil of Eucalyptus citriodora and Ocimum gratissimum exibited complete elimination of seed fungi, increased seed germination and reduced seedling mortality as compared to that of E. camaldulensis and O. americanum.DOI: http://dx.doi.org/10.3329/cujbs.v5i1.13364 The Chittagong Univ. J. B. Sci.,Vol. 5(1 &2):01- 07, 2010
Histopathology of the intestine of Clarias batrachus L. under Heavy metal stress
Authors: Begum Shawkat Ara , Banu Qamar , Hoque Baharul
Published: January 2013

Histopathological effect of three heavy metals- cadmium, chromium and mercury on intestine of Clarias batrachus L. was studied under laboratory condition. The common histopathological changes that took place under heavy metal exposure were disintegration of mucosal epithelium, hypertrophied epithelial cells, increased number of goblet cells, sloughed off epithelial cells and mucous in the lumen, degeneration of the connective tissue of sub-mucosa and hyperemic blood vessels. .Separation of mucosal epithelium, especially in the villi and increased goblet cells were prominent in Cd-exposed fish. Clumping of the epithelial cells at the base near the basement membrane was prominent in the case of the Cr- and Hg-exposure. Connective tissue degeneration in the lamina propria and submucosa of the intestine and dilated blood vessels with congestion of blood were prominent in the Cr and Hg exposed fish. DOI: http://dx.doi.org/10.3329/cujbs.v5i1.13369 The Chittagong Univ. J. B. Sci.,Vol. 5(1 &2):45-53, 2010
Efficient plant regeneration from embryogenic cell suspension culture of two deepwater rice (Oryza sativa L.) Varieties
Authors: Khaleda L , Al-Forkan M
Published: January 2013

Cell suspension cultures were initiated from 28-30 d old scutellar-derived embryogenic calli of two deepwater rice varieties HAJA-1 and HAJA-8 and maintained on R2 liquid medium containing 2 mg l-1 2,4-D. The formation of fine embryogenic cell suspensions and subsequent plant regeneration were dependent on plant genotype and culture media. Variety HAJA-8 was found less viable than the other variety HAJA-1. In general, it was observed that variety HAJA-1 showed better performance compared to variety HAJA-8 to R2 medium for the initiation of embryogenic cell lines and the rate of the cell growth was higher in this variety. Plant regeneration was not obtained from cell suspensions of both varieties when cells were cultured on regeneration media semi-solidified with 0.4% (w/v) agarose. Plant regeneration from cell suspensions of the both varieties were obtained when the agrose concentration of the regeneration media was increased from 0.4 to 1% (w/v). The highest plant regeneration frequencies were obtained from cell suspensions of the varieties HAJA-1 and HAJA-8 (48%) and (42%), respectively, pre-treated with water for 5 h and cultured on MS medium supplemented with 2 mg l-1 BAP+1 mg l-1 Proline. Washing cell suspensions with water for a prolonged period of time (15 h and more) inhibited plant regeneration. DOI: http://dx.doi.org/10.3329/cujbs.v5i1.13374 The Chittagong Univ. J. B. Sci.,Vol. 5(1 &2):91-103, 2010
Antimicrobial and cytotoxic activity of Macrophomina phaseolina isolated from gummosis infected citrus reticulata
Authors: Das Rubal C , Banik Rajib , Bhuiyan Robiul Hasan , Kabir Md Golam
Published: January 2013

Macrophomina phaseolina is one of the pathogenic organisms of gummosis disease of orange tree (Citrus reticulata). The pathogen was identified from the observation of their colony size, shape, colour, mycelium, conidiophore, conidia, hyaline, spore, and appressoria in the PDA culture. The crude chloroform extracts from the organism showed antibacterial activity against a number of Gram positive and Gram-negative bacteria. The crude chloroform extract also showed promising antifungal activity against three species of the genus Aspergillus. The minimum inhibitory concentration (MIC) of the crude chloroform extract from M. phaseolina against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Shigella sonnie were 128 ?gm, 256 ?gm, 128 ?gm and 64 ?gm/ml respectively. The LD50 (lethal dose) values of the cytotoxicity assay over brine shrimp of the crude chloroform extract from M. phaseolina was found to be 51.79 ?gm/ml. DOI: http://dx.doi.org/10.3329/cujbs.v5i1.13378 The Chittagong Univ. J. B. Sci.,Vol. 5(1 &2):125-133, 2010
Pesticide residues in water samples of some paddy fields in Narayangonj
Authors: Chowdhury M Alamgir Z , Uddin M Amin , Sultan M Tipu , Hasanuzzaman M , Hoque M Ainul , Zaman MA
Published: January 2013

DOI: http://dx.doi.org/10.3329/cujbs.v5i1.13381 The Chittagong Univ. J. B. Sci.,Vol. 5(1 &2):155-157, 2010
A Natural Ventilation Alternative to the Passivhaus Standard for a Mild Maritime Climate
Authors: Sassi Paola
Published: January 2013

This study examines the need in mild maritime climates, such as the southern areas of the UK, for mechanical ventilation with heat recovery (MVHR) as required by the German Passivhaus standard. It considers the comfort, air quality and energy impacts of MVHR versus natural ventilation and reviews the post-occupancy monitoring data of two flats in Cardiff designed to Passivhaus standards, one of which had been operated as a naturally ventilated building rather than with MVHR. The energy consumption of this free-running flat was significantly lower (36 kWh primary energy/m²a) than the Passivhaus Planning Package modeling had predicted (93 kWh primary energy/m²a) with no adverse effects on occupant comfort, air quality or excessive humidity, and advantages of lower capital cost and maintenance. The paper concludes that in climates with mild winters and cool summers the use of MVHR could be omitted without compromising comfort levels and achieving at least equivalent energy savings resulting from adopting the Passivhaus model and at a lower capital cost. This suggests the potential for a naturally ventilated, ultra-low energy model with lower capital investment requirements and lower disruption when applied to retrofit that would facilitate its mainstream adoption.
An Equilibrium Analysis of Knaster’s Fair Division Procedure
Authors: Van Essen Matt
Published: January 2013

In an incomplete information setting, we analyze the sealed bid auction proposed by Knaster (cf. Steinhaus (1948)). This procedure was designed to efficiently and fairly allocate multiple indivisible items when participants report their valuations truthfully. In equilibrium, players do not follow truthful bidding strategies. We find that, ex-post, the equilibrium allocation is still efficient but may not be fair. However, on average, participants receive the same outcome they would have received if everyone had reported truthfully—i.e., the mechanism is ex-ante fair.
Engineering Geology Maps for Planning and Management of Natural Parks: “Las Batuecas-Sierra de Francia” and “Quilamas” (Central Spanish System, Salamanca, Spain)
Authors: Martínez-Graña Antonio , Goy José , Zazo Caridad , Yenes Mariano
Published: January 2013

Presented herein is a cartographic procedure that is easy to utilise and at low-cost, which facilitates the first stages of planning and management of a naturally protected space and considers the geotechnical parameters that influence human activity. This procedure uses geographical information systems technology by combining the cartographies for the most influential parameters on the stability of the area (lithology, hydrogeology, geomorphology, slopes, lineament/fractures and seismicity) with geomechanical mapping generated from geotechnical parameters obtained through field and laboratory tests. This geotechnical mapping facilitates the division of a territory into zones according to each type of problem and generates a cartography for natural hazards. Using this information, it is possible to produce a cartography of constructive conditions or geotechnical hazards. This methodology has been validated by application to two natural protected spaces, “Las Batuecas-Sierra de Francia” and “Quilamas”. The validation confirmed that the cartography procedure described herein is a preventive, and not a structural measure. It is a tool that delimits areas with different constructive use recommendations and limitations, and therefore, is useful for natural space managers.
Design and in Vitro Biocompatibility of a Novel Ocular Drug Delivery Device
Authors: Gooch Nathan , Burr Randon , Holt Dolly , Gale Bruce , Ambati Balamurali
Published: January 2013

The capsule drug ring (CDR) is a reservoir and delivery agent, which is designed to be placed within the capsular bag during cataract surgery. Prototypes were manufactured by hot melt extrusion of Bionate II®, a polycarbonate urethane. The devices have been optimized using Avastin® as the drug of interest. In vitro biocompatibility was assessed with human lens epithelial cell (B-3), mouse macrophage (J774A.1) and mouse fibroblast (L-929) cell lines. Cell migration and proliferation were assessed after in vitro culture. Pro-inflammatory cytokines (i.e., MIP-1β, MIP-1α, MCP-1, IL-1β, TNF and TGF-β1) were quantified using cytometric bead array (CBA). Preliminary in vivo biocompatibility and pharmacokinetics testing has been performed in rabbits.
Satellite-Observed Black Water Events off Southwest Florida: Implications for Coral Reef Health in the Florida Keys National Marine Sanctuary
Authors: Zhao Jun , Hu Chuanmin , Lapointe Brian , Melo Nelson , Johns Elizabeth , Smith Ryan
Published: January 2013

A “black water” event, as observed from satellites, occurred off southwest Florida in 2012. Satellite observations suggested that the event started in early January and ended in mid-April 2012. The black water patch formed off central west Florida and advected southward towards Florida Bay and the Florida Keys with the shelf circulation, which was confirmed by satellite-tracked surface drifter trajectories. Compared with a previous black water event in 2002, the 2012 event was weaker in terms of spatial and temporal coverage. An in situ survey indicated that the 2012 black water patch contained toxic K. brevis and had relatively low CDOM (colored dissolved organic matter) and turbidity but high chlorophyll-a concentrations, while salinity was somewhat high compared with historical values. Further analysis revealed that the 2012 black water was formed by the K. brevis bloom initiated off central west Florida in late September 2011, while river runoff, Trichodesmium and possibly submarine groundwater discharge also played important roles in its formation. Black water patches can affect benthic coral reef communities by decreasing light availability at the bottom, and enhanced nutrient concentrations from black water patches support massive macroalgae growth that can overgrow coral reefs. It is thus important to continue the integrated observations where satellites provide synoptic and repeated observations of such adverse water quality events.
A Comparative Study on Three Different Transducers for the Measurement of Nonlinear Solitary Waves
Authors: Ni Xianglei , Cai Luyao , Rizzo Piervincenzo
Published: January 2013

In the last decade there has been an increasing interest in the use of highly- and weakly- nonlinear solitary waves in engineering and physics. Nonlinear solitary waves can form and travel in nonlinear systems such as one-dimensional chains of particles, where they are conventionally generated by the mechanical impact of a striker and are measured either by using thin transducers embedded in between two half-particles or by a force sensor placed at the chain’s base. These waves have a constant spatial wavelength and their speed, amplitude, and duration can be tuned by modifying the particles’ material or size, or the velocity of the striker. In this paper we propose two alternative sensing configurations for the measurements of solitary waves propagating in a chain of spherical particles. One configuration uses piezo rods placed in the chain while the other exploits the magnetostrictive property of ferromagnetic materials. The accuracy of these two sensing systems on the measurement of the solitary wave’s characteristics is assessed by comparing experimental data to the numerical prediction of a discrete particle model and to the experimental measurements obtained by means of a conventional transducer. The results show very good agreement and the advantages and limitations of the new sensors are discussed.
Un ritratto di età gallienica da Hierapolis di Frigia
Authors: Ismaelli Tommaso
Published: January 2013

Résumé Lors des fouilles récentes de la Mission archéologique italienne à Hiérapolis de Phrygie (Denizli, Turquie) a été mise au jour une tête, le portrait d’un homme, qui provient d’un édifice public situé au centre de la cité. Bien conservé et finement travaillé, l’objet remonte à la première partie du règne de Gallien, une datation avancée autant pour des raisons techniques, dans le traitement de la chevelure, que par des comparaisons iconographiques avec le « Samtherrschaftstypus » (« type du pouvoir partagé » ; 253-260 apr. J.-C.). Ces allusions délibérées à Gallien vont de pair avec des traits typiques des portraits des « empereurs-soldats », selon un phénomène mis en évidence pour d’autres portraits masculins. Cette découverte exceptionnelle est mise en relation avec les centres de production en Asie Mineure, avec la question débattue de la « renaissance » sous Gallien et de sa réception dans les cités d’Asie Mineure. Pour finir, le goût suranné et l’intensité du visage sont examinés comme exprimant les valeurs conservatrices qui caractérisaient la politique culturelle impériale et les élites locales.
Le Dioscure du Quirinal dans la Gypsothèque du Musée du Louvre
Authors: Le Breton Élisabeth
Published: January 2013

Résumé La restauration, en 2006-2007, d’un moulage du groupe dit « des Dioscures de Monte Cavallo », conservé dans la Gypsothèque du Musée du Louvre à Versailles, dans la Petite Écurie du Roi, a offert l’occasion de se pencher sur son histoire mouvementée. Comment naquit l’idée d’obtenir un moulage aussi imposant, quand et à quelle fin ? Depuis leur installation au xvi e  s., à Rome, sur la colline du Quirinal, ces colosses ne cessent de fasciner et l’Europe entière cherche alors à obtenir une prise d’empreinte. Des projets sont lancés très tôt en France, mais il faudra attendre 1823 pour qu’enfin les creux d’un des Dioscures arrivent au Louvre, venant de Rome via Londres. Le tirage en plâtre passera en 1868 à l’École impériale des Beaux-Arts, d’où il sera évacué en 1970, en pièces découpées, vers les Écuries du Roi à Versailles. Affecté au Département des antiquités grecques, étrusques et romaines du Musée du Louvre en 2001, ce moulage colossal est maintenant redressé sous la rotonde de la Gypsothèque.
A la recherche de l'architecture et de son décor en Gaule romaine
Authors: Barbet Alix
Published: January 2013

Résumé En partant des actes d’un colloque tenu à Toulouse en 2008, qui traite du décor dans son ensemble et de ses rapports avec l’architecture antique en Gaule romaine, l’auteur élargit et complète le propos en apportant une contribution à l’articulation des décors et à l’interaction entre mosaïque, peinture, stuc et placages, sans oublier la sculpture, non prise en compte dans ces actes.
Chronique d'architecture grecque (2011)
Authors: Hellmann Marie-Christine
Published: January 2013

Résumé Deux grosses monographies parues en 2011 sont analysées, portant chacune sur un monument grec peu ou mal connu, quoique important : d’abord, la publication du temple d’Asclépios à Messène, qui a offert à son auteur l’occasion de faire le point sur d’autres édifices de la cité et, plus généralement, sur l’architecture religieuse à l’époque hellénistique ; ensuite, l’étude très complète dont ont bénéficié les fortifications de Thasos, qui comprennent aussi un port « fermé ».
Le rôle des représentations sociales au cours du processus de construction d'un outil de contrôle de gestion
Authors: Dreveton Benjamin
Published: January 2013

Résumé Cette recherche s’intéresse au rôle des représentations sociales des acteurs au cours de la construction d’un outil de gestion dans l’organisation publique. À l’aide d’une étude de cas, les résultats de cette recherche soulignent que l’interaction entre l’outil de contrôle de gestion et les représentations des acteurs est un facteur de succès des processus d’instrumentation. Afin de gérer cette dialectique, l’organisation doit d’une part inventer un mode d’action qui favorise l’échange et, d’autre part, ouvrir le processus de construction à des personnes extérieures à l’organisation.
L'incidence du choix du fait générateur sur la pertinence et la fiabilité des comptes publics : le cas de la Sécurité sociale
Authors: Lande Évelyne , Boulerne Sandrine , Jaouan Fatima
Published: January 2013

Résumé Cet article a pour objet d’étudier l’impact du choix du fait générateur sur la pertinence de l’information financière, plus particulièrement celle relative aux comptes combinés des organismes de Sécurité sociale. Une analyse théorique et pragmatique des faits générateurs s’est traduite par l’émergence de notions de fait générateur primaire et fait générateur secondaire dont le choix ne déroge pas aux principes des droits constatés. À l’appui de simulations numériques réalisées sur 3 ans, de 2003 à 2005, sur les comptes combinés des caisses nationales et du régime général, les auteurs démontrent que l’application du fait générateur secondaire d’une part, élimine certains travaux d’inventaire, essentiellement fondés sur des estimations et d’autre part, assure une fiabilité et une pertinence entières des données comptables.
La relation de soin avec l'adolescent en psychiatrie
Authors: Abdel-Ahad Pierre , Scheuer Michel , Richa Sami
Published: January 2013

Résumé La personnalité en développement de l’adolescent et sa quête d’autonomie lui confèrent un statut spécial au sein du système de santé. À un âge transitionnel entre l’enfance et l’âge adulte, la société lui accorde un degré d’autonomie qui risque de mettre en cause l’autorité parentale protectrice. Ces particularités s’inscrivent dans une évolution sociétale libérale, où la promotion du concept de « consentement éclairé » transforme la relation médecin-patient.
Application of Guided Imagery to Facilitate the Transition of New Graduate Registered Nurses
Authors: Boehm Laura B. , Tse Alice M.
Published: January 2013

Traditionally, the new graduate registered nurse (RN) transition has included a didactic and skills-based orientation accompanied by a period of preceptored practice. However, these methods do not ensure that new RNs are in a state of reduced anxiety to fully interact with their new environment. Transition to practice may cause anxiety, and the new graduate RN may perceive moderate to severe stress. One method of stress reduction is the use of guided imagery, which has shown strong potential with a variety of populations undergoing stressful events. Today, new graduate RNs expect institutions to facilitate orientation to their new employment settings and assist in the transition to their role as a professional nurse. This article proposes a model that incorporates guided imagery for refining the new graduate RN transition process. The model can be adapted for use in the context of orienting other adult learners to unfamiliar practice situations.
Web-Based Environmental Health Education: Fish Facts
Authors: Anderko Laura , Otter Ada , Chalupka Stephanie , Anderko Chris , Fahey Carrie
Published: January 2013

Nurses and other health professionals are often asked about the benefits and risks of fish consumption. The combination of conflicting media messages about these risks and benefits and limited knowledge has led to confusion about how to properly advise people about safe fish consumption. “Fish Facts for Health Professionals” was the result of a collaborative effort of environmental, public health, medical, nursing, and media experts to create a web-based educational series to address the need for reliable information on fish consumption. Using interviews and real case studies, the 3- to 5-minute media modules provided a strong visual element while remaining conversational. The modules were viewed worldwide, and 121 participants successfully completed the requirements for professional continuing education credit.
A 66-Year-Old Woman with Facial Tics and Social Impairment
Authors: Garakani Amir , Welch Alison K. , Newcorn Jeffrey H.
Published: January 2013

CME Educational Objectives

1.

Establish the differential diagnosis for an older patient presenting with inattention and deficits in interpersonal functioning.

2.

Understand the potential risks and benefits of various pharmacological treatment options for older adults with attention-deficit/hyperactivity disorder (ADHD).

3.

Review the potential role of cognitive-behavioral therapy in ADHD refractory to psychopharmacologic interventions.

A 66-year-old married, retired white woman with a medical history of hypertension and a self-reported history of attention problems is referred to a psychiatrist for medication management. On initial contact, the patient indicated that she had been diagnosed with attention-deficit/hyperactivity disorder as an adult and was previously managed by another psychiatrist, now retired.