OALib Journal期刊

ISSN: 2333-9721

費用:99美元

投稿

時間不限

2020 ( 106 )

2019 ( 240 )

2018 ( 279 )

2017 ( 294 )

自定義范圍…

匹配條件: “R Dhakal” ,找到相關結果約224059條。
列表顯示的所有文章,均可免費獲取
第1頁/共224059條
每頁顯示
The Local Environmental, Economic and Social Tragedies of International Interventions on Community Based Forest Management for Global Environmental Conservation: A Critical Evaluation  [PDF]
Bhubaneswor Dhakal
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.41010
Abstract:

This study reviewed the policies and outcomes of international support for forest management in Nepal and answered whether international support on forest management in developing countries resulted in positive socioeconomic and environmental outcomes at local communities. The evaluation is based on the socio-ecological theory and synergies-tradeoff model of forestry ecosystems goods and services. The study shows that the international interventions influenced national policies and community forestry practices, which contributed to the remarkable increase of forest stock. The new forestry institutions increased timber product supplies to urban users and contributed to offsetting of greenhouse gas emission of affluent societies in overseas. However, the intervention spoiled centuries of old forestry practices, which had contributed to the evolvement of socio-ecological condition, sustained local economy and environment systems. The new forestry institutions and practices locked local opportunities of multipurpose uses of forest, worsened water yield and local knowledge, and hampered local economic activities. Consequently they affected habitat diversities for forest based species, and forest resource supplies for sustaining agrobiodiversities and local food security. In reality the interventions increased benefit to distant users (urban users in the country and affluent societies in overseas) and further marginalized local communities and particularly socially disadvantaged people. The paper shows that the international forestry policies and supports are technically wrong or poorly based on science which is against their promise of providing better technical supports and benefiting local communities in developing countries. It argues that the interventions created many complexities in forestry institutions and practices which require too costly endeavor to change and address the local socioeconomic and environmental problems. The paper has explained the root cause of the international policy problem on many schools of thought.

?

Impact of Cardamom Cultivation on the Composition and Dynamics of Soil Seed Banks in a Conservation Forest in Sri Lanka: Implications for Conservation  [PDF]
Balram Dhakal
Open Journal of Forestry (OJF) , 2017, DOI: 10.4236/ojf.2017.73019
Abstract: Cultivation of cash crops, such as cardamom (Elettaria cardamomum) in the forest understorey is a common practice in many tropical forests. Over time, cultivation may change forest structure and species composition, leading to gradual degradation of biodiversity and ecosystem services. Effective conservation of these forests requires an enhanced understanding of the demographic processes such as soil seed bank that may greatly influence future forest composition. We examined how the soil seed bank structure and composition responds to cardamom cultivation in a high conservation value Sri Lankan montane rain forest. Soil samples from natural forest with abandoned cardamom plantations (CP) and adjacent natural forest (NF) patches without cardamom were collected in dry and wet seasons. Soil samples were spread out in trays in a shade house and germination was recorded weekly for 19 weeks. The density of seeds in the soil seed bank was much higher in CP than NF. While grasses and forbs contributed the highest number and percentage of seeds in soils of both forest types, their densities in the soil seed bank were 9 and 2 times greater in the CP than the NF, respectively. Seeds of the non-native herbs Ageratina riparia and E. cardamomum were 4 and 20 times greater in the soil of CP, respectively. Seeds of light demanding tree species such as Macaranga indica were restricted to soils of CPs. Overstorey tree community of each forest type was poorly represented in their respective soil seed banks. The high density of seeds of pioneer trees and non-native herbs in the soil of CPs, combined with higher light transmission to the ground floor may exacerbate competition for resources with the seedlings of late successional trees of high conservation value. To overcome this barrier and enhance conservation value of the forest, restoration strategies may need to focus on transplanting seedlings of these species into forest with abandoned cardamom plantations.
Comment on "Proximity breakdown of hydrides in superconducting niobium cavities" [arXiv:1212.3384]
G. Ciovati,P. Dhakal,G. R. Myneni
Physics , 2013,
Abstract: Comment on Proximity breakdown of hydrides in superconducting niobium cavities [arXiv:1212.3384].
Clearing Deleterious Proteins for Healthier Aging  [PDF]
Ian Macreadie, Sudip Dhakal
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.75010
Abstract:
The build-up of deleterious proteins is one of the biggest problems in aging. The brain, the organ most sensitive to this phenomenon, seeks to maintain the correct balance by the process known as proteostasis but this process declines with aging. Reduced proteostasis causes major age-related diseases such as Alzheimer’s Disease, Parkinson’s Disease, and prion diseases, where aberrant proteins are known to associate with such diseases. Being able to restore proteostasis is likely to slow age-related decline in brain function, but the challenges are to find chemo preventatives that can enhance proteostasis to youthful levels, and to know how to administer these chemopreventative agents. A combination of epidemiology and studies in a convenient model system are providing approaches to find answers to these important questions.
Nocardia brasiliensis primary pulmonary nocardiosis with subcutaneous involvement in an immunocompetent patient
Amatya R,Koirala R,Khanal B,Dhakal S
Indian Journal of Medical Microbiology , 2011,
Abstract: This is a report of an unusual case of Nocardia brasiliensis causing primary pulmonary nocardiosis with disseminated subcutaneous lesions in an immunocompetent patient. This case highlights the importance of considering nocardiosis as a differential diagnosis in patients with pulmonary and cutaneous lesions and the need for vigorous management for complete cure.
Numerical and analytical investigation towards performance enhancement of a newly developed rockfall protective cable-net structure
S. Dhakal,N. P. Bhandary,R. Yatabe,N. Kinoshita
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2012, DOI: 10.5194/nhess-12-1135-2012
Abstract: In a previous companion paper, we presented a three-tier modelling of a particular type of rockfall protective cable-net structure (barrier), developed newly in Japan. Therein, we developed a three-dimensional, Finite Element based, nonlinear numerical model having been calibrated/back-calculated and verified with the element- and structure-level physical tests. Moreover, using a very simple, lumped-mass, single-degree-of-freedom, equivalently linear analytical model, a global-displacement-predictive correlation was devised by modifying the basic equation – obtained by combining the principles of conservation of linear momentum and energy – based on the back-analysis of the tests on the numerical model. In this paper, we use the developed models to explore the performance enhancement potential of the structure in terms of (a) the control of global displacement – possibly the major performance criterion for the proposed structure owing to a narrow space available in the targeted site, and (b) the increase in energy dissipation by the existing U-bolt-type Friction-brake Devices – which are identified to have performed weakly when integrated into the structure. A set of parametric investigations have revealed correlations to achieve the first objective in terms of the structure's mass, particularly by manipulating the wire-net's characteristics, and has additionally disclosed the effects of the impacting-block's parameters. Towards achieving the second objective, another set of parametric investigations have led to a proposal of a few innovative improvements in the constitutive behaviour (model) of the studied brake device (dissipator), in addition to an important recommendation of careful handling of the device based on the identified potential flaw.
Experimental, numerical and analytical modelling of a newly developed rockfall protective cable-net structure
S. Dhakal,N. P. Bhandary,R. Yatabe,N. Kinoshita
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2011, DOI: 10.5194/nhess-11-3197-2011
Abstract: An innovative configuration of pocket-type rockfall protective cable-net structure, known as Long-span Pocket-type Rock-net (LPR), has been developed in Japan. The global performance of the proposed system was initially checked by the experimental (full-scale) modelling. Given the various limitations of the physical experiments, particularly for the parametric study to have a detailed understanding of the newly developed system, a reliable and simplified method of numerical modelling is felt necessary. Again, given the sophistication involved with the method of numerical simulation, a yet simplified modelling approach may prove more effective. On top of this background, this paper presents a three-tier modelling of a design of LPR. After physical modelling, which has revealed that the displacement response may be taken more vital for LPR performance, Finite Element based numerical modelling is presented. The programme LS-DYNA is used and the models are calibrated and verified with the element- and structure-level experiments. Finally, a simple analytical modelling consisting of the equivalently linear and elastic, lumped-mass, single-degree-of-freedom system, capable of predicting the global displacement response, is proposed based on the basic principles of conservation of linear momentum and energy. The model is back-calculated and modified from the analyses of the verified numerical model.
Management of Pediatric Displaced Distal Metaphyseal Forearm Fracture: Comparison between Cast Immobilization and Percutaneous Kirschner Wire Fixation
D Shrestha,D Dhoju,N Parajuli,G Dhakal,R Shrestha
Nepal Orthopaedic Association Journal , 2011, DOI: 10.3126/noaj.v2i1.8133
Abstract: Background: Distal metaphyseal forearm fracture is one of the common injuries in children. Closed reduction and above elbow cast is the standard method of treatment but reported to be associated with redisplacement rate of 7-25%. Closed reduction and fixation with percutaneous Kirschner wire is an alternative treatment option to prevent redisplacement. Methods: Thirty five children (group I) of age between 6 to 13 yrs with displaced ( more than 50% of cortical diameter) or angulated (more than 20°) distal metaphyseal forearm fracture managed with closed reduction and above elbow cast were compared with 21 children (group II) managed with closed reduction and percutaneous crossed Kirschner fixation. Clinical outcomes and complications were compared in both groups after 12 weeks of follow up. Results: Preoperative variables in both the groups were comparable. Mean loss of elbow flexion and extension (12° vs. 4°, p =0.08), wrist dorsflexion and palmerflexion (27° vs. 14°, p=0.12) and forearm supination and pronation (27° vs. 15°, p= 0.143) were more in group I but were statistically not significant. Complications rate (28.4% vs. 19.04%, p= 0.04) was higher in group I (such as fracture redisplacement and swelling) than in group II (pin tract infection). Conclusions : Grossly displaced or angulated distal metaphyseal forearm both bone fracture in children treated with either closed reduction and above elbow cast or closed reduction with crossed Kirschner wire fixation have no statistically significant clinical outcomes in terms of loss of movement of elbow, wrist and forearm but complication rate is higher in cast group. Percutaneous Kirschner wire fixation prevents redisplacement. DOI: http://dx.doi.org/10.3126/noaj.v2i1.8133 Nepal Orthopaedic Association Journal Vol.2(1) 2011: 1-6
Tuber yield and quality of potato chips as affected by mulch, variety, and potash levels under western Terai, Nepal
R Dhakal, SK Sah, SM Shakya, KB Basnet
Agronomy Journal of Nepal , 2011, DOI: 10.3126/ajn.v2i0.7527
Abstract: An experiment was conducted at Divyapuri of Nawalparasi district in the western Terai during winter season 2008/09. There were 16 treatments consisting of two mulch levels (mulched and no mulch) as main plot, two varieties (Kufri Chipsona-1 and Kufri Chipsona-2) as sub plot and four levels of potash (0, 50, 100 and 150 kg K 2 O /ha) as sub-sub plot arranged in split-split plot design with four replications to evaluate the effect of these treatments on tuber production and their effect on quality of potato chips. The result showed that plant height, number of shoot per plant, dry matter accumulation, number and weight of tuber per plant and tuber yield were significantly higher in Kufri Chipsona-2 than in Kufri Chipsona-1. Lower reducing sugar and browning percent of chips and higher dry matter content and chips recovery were also recorded in Kufri Chipsona-2 compared to Kufri Chipsona-1. Simple economic analysis on gross return, net return and B/C ratio were higher in Kufri Chipsona-2. However, increasing levels of potash from 0-150 kg K 2 O /ha increased the dry matter accumulation, LAI, number and weight of tuber per plant. The result also showed that as the level of potash increased there was a decrease level of reducing sugar and browning of chips as well. On the other hand, higher potash levels increased the percentage of fat content and recovery of chips. Also increase in potash levels resulted to increase in gross return, net return, and B/C ratio. There was no effect of mulching levels on tuber yield and quality of chips recovery. Of the two varieties, Kufri Chipsona-2 with 100 kg K 2 O/ha was found suitable for tuber production and recovery of chips quality. DOI: http://dx.doi.org/10.3126/ajn.v2i0.7527 Agronomy Journal of Nepal (Agron JN) Vol. 2: 2011 pp.121-132
The Problem of Infertility with Hyperprolactenemia
Samjahana Dhakal
Nepal Journal of Obstetrics and Gynaecology , 2010, DOI: 10.3126/njog.v5i1.5053
Abstract: DOI: http://dx.doi.org/10.3126/njog.v5i1.5053 NJOG 2010 Jul-Aug; 5(1): 7-11
第1頁/共224059條
每頁顯示


Home
Copyright ? 2008-2017 Open Access Library. All rights reserved.

久草在现在线中文字幕