scholarly journals Optimal management of hydropower production: Case of Memve’ele hydropower reservoir policy

2022 ◽  
Vol 8 ◽  
pp. 1425-1456
Author(s):  
Daniel Eutyche Mbadjoun Wapet ◽  
Salomé Ndjakomo Essiane ◽  
René Wamkeue ◽  
Dieudonné Bisso ◽  
Patrick Juvet Gnetchejo
Keyword(s):  
Optimal Management ◽  
Hydropower Production ◽  
Hydropower Reservoir

scholarly journals Evaluating Ecosystems Services Values due to Land use Transformation in the Gojeb Sub-basin, Southwest Ethiopia

2021 ◽  
Author(s):  
Hailu Shiferaw ◽  
Tena Alamirew ◽  
Tibebu Kassawmar ◽  
Gete Zeleke
Keyword(s):  
Land Use ◽  
Sustainable Use ◽  
Land Use Land Cover ◽  
Cultivated Land ◽  
Policy Makers ◽  
Use Of Resources ◽  
Small Holder Farmers ◽  
Hydropower Production ◽  
Land Use Transformation ◽  
Hydropower Reservoir

Abstract BackgroundLand use land cover (LULC) transformation and ecosystems service valuation (ESVs) play important roles for vegetation restoration and payment for ecosystems service (PES) programs. The objective of this work was to quantify LULC transformations and associated ESVs in the Gojeb sub-basin by analyzing LULC between 1986 and 2016 using satellite images, field observations and ancillary datasets. ResultsThe summarized LULC classes are: bareland, cropland, grassland, forest, plantation, settlement, shrub, water-body and woodland. The ESVs were evaluated for each LULC based on these LULC classes. Forests had the highest cover (> 423000ha ~60%) in 1986 but it reduced to 317000ha (~45%) in 2016. About >56000ha of forests were changed to cultivated land, and >105000ha to different classes. Cultivated land increased from >258000ha (~37%) in 2016 compared to 150000ha (~21.5%) in 1986. The sub-basin had ESVs of US$2.52 billion in 1986 but decreased to US$1.97 billion in 2016; losing about US$0.551 billion within the last 30 years (annual loss rate of US$18.4 million). Potential drivers would be agricultural expansion, land degradation/erosion, landslide and deforestation, indicating that requires concerted effort to restore and manage landscapes for sustainable socio-ecological and economic uses.ConclusionThis study is meaningful for management of natural resources in the catchment, improvement of hydropower production and lifespan of the hydropower reservoir on one hand and productivity of small holder farmers and inhabitants in the basin on the other besides to the lesson learned to other similar basins. Hence, payment for ecosystems service scheme is recommended as a win-win approach to be implemented between upper and downstream users for sustainable use of resources. This study assist policy makers in designing evidence-based solutions for PES programs in the study area and elsewhere.

scholarly journals Fuzzy reliability-based optimization of a hydropower reservoir

2019 ◽  
Vol 21 (2) ◽  
pp. 308-317 ◽  
Author(s):  
Sukanya J. Nair ◽  
K. Sasikumar
Keyword(s):  
Performance Optimization ◽  
Optimal Operation ◽  
Operating Policy ◽  
Multi Stage ◽  
Decision Making Problem ◽  
Fuzzy Event ◽  
Hydropower Production ◽  
Reliability Based Optimization ◽  
Optimal Operating Policies ◽  
Hydropower Reservoir

Abstract Reservoir operation modeling and optimization are inevitable components of water resources planning and management. Determination of reservoir operating policy is a multi-stage decision-making problem characterized by uncertainty. Uncertainty in inflows and power demands lead to varying degrees of the working of a reservoir from one period to another. This transition, being ambiguous in nature, can be addressed in a fuzzy framework. The different working states of the reservoir are described as fuzzy states. Based on the degree of success in meeting the power demand and randomness associated with inflows, hydropower production is considered as a random fuzzy event. This paper examines the scope of profust reliability theory, a theory used in the reliability analysis of manufactured systems, in the performance optimization of a hydropower reservoir system. The operating policy derived from a profust reliability-based optimization model is compared with a simulation model. The model is then used to derive the optimal operation policy for a hypothetical reservoir fed by normally distributed inflow, for a period of five years. The results show that the model is useful in deriving optimal operating policies with improved reliabilities in hydropower production.

Towards the digital land reclamation

2020 ◽  
pp. 5-9
Author(s):  
Sergey Vasil'ev ◽  
Vyacheslav Schedrin ◽  
Aleksandra Slabunova ◽  
Vladimir Slabunov
Keyword(s):  
Retrospective Analysis ◽  
Land Reclamation ◽  
Practical Experience ◽  
Maximum Effect ◽  
Optimal Management ◽  
Scientific Potential ◽  
History Of ◽  
Definition Of ◽  
Further Development ◽  
Full Cooperation

The aim of the research is a retrospective analysis of the history and stages of development of digital land reclamation in Russia, the definition of «Digital land reclamation» and trends in its further development. In the framework of the retrospective analysis the main stages of melioration formation are determined. To achieve the maximum effect of the «digital reclamation» requires full cooperation of practical experience and scientific potential accumulated throughout the history of the reclamation complex, and the latest achievements of science and technology, which is currently possible only through the full digitalization of reclamation activities. The introduction of «digital reclamation» will achieve greater potential and effect in the modernization of the reclamation industry in the «hightech industry», through the use of innovative developments and optimal management decisions.

Identifying barriers and solutions to the optimal management of a patient with T1DM and a severe life limiting dermatological condition

2019 ◽  
Author(s):  
Nimasha Wijesinghe ◽  
Samantha Drew ◽  
Annaruby Cunjamalay ◽  
Sasha R Howard ◽  
Rakesh Amin ◽  
...  
Keyword(s):  
Optimal Management ◽  
Dermatological Condition

Predisposing Factors, Demographics, Angiographic Features, and the Possible Role of Inflammation in Coronary Perforations—A 10-year Single-center Experience

2011 ◽  
Vol 9 (2) ◽  
pp. 87 ◽  
Author(s):  
Preeti Chandra ◽  
Saurav Chatterjee ◽  
Nishant Koradia ◽  
Deepak Thekkoott ◽  
Bilal Malik ◽  
...  
Keyword(s):  
Risk Factors ◽  
Artery Bypass ◽  
Bypass Graft ◽  
Coronary Intervention ◽  
Predisposing Factors ◽  
Covered Stents ◽  
Optimal Management ◽  
Balloon Inflation ◽  
Catheterization Laboratory ◽  
Cell Counts

Background:Coronary perforation during percutaneous coronary intervention is a rare but dreaded complication. The risk factors, optimal management, and outcome remain obscure.Objectives:To determine the predisposing factors, optimal management, and preventive strategies. We retrospectively looked at coronary perforations at our catheterization laboratory over the last 10 years. We reviewed patient charts and reports. Two independent operators, in a blinded approach, reviewed all procedural cineangiograms. Data were analyzed by simple statistical methodology.Results:Nine patients were treated conservatively and six patients were treated with prolonged balloon inflation. Six patients were treated with polytetrafluoroethylene (PTFE)-covered stents. One patient required emergency coronary artery bypass graft. No deaths were reported. Subjects with perforations also had a significantly higher total white blood cell count (means 12,134 versus 6,155, 95 % confidence interval [CI], p< 0.0001, n=22), total absolute neutrophil count (means 74.2 % versus 57.1 %, 95 % CI, p<0.0001, n=22), and neutrophil:lymphocyte ratio (means 3.65 versus 1.50, 95% CI, p<0.0001, n=22).Conclusions:Coronary perforations are rare but potentially fatal events. Hypertension, small vessel diameter, high balloon:artery ratio, use of hydrophilic wires, and presence of myocardial bridging appear to be possible risk factors. Most perforations can be treated conservatively or with prolonged balloon inflation using perfusion balloons. Use of PTFE-covered stents could be a life-saving measure in cases of large perforations. Subjects with perforations also had greater systemic inflammation as indicated by elevated white cell counts.

Optimal management of microgrid with renewable generation

2017 ◽  
Vol 1 (15) ◽  
pp. 719-724
Author(s):  
J.A. Domínguez-Navarro ◽  
J.L. Bernal-Agustín ◽  
R. Dufo-Lopéz ◽  
J.S. Artal-Sevil ◽  
A.A. Bayod-Rújula ◽  
...  
Keyword(s):  
Optimal Management ◽  
Renewable Generation

MANAJEMEN GURU MODEL GUARDIAN ANGEL MENURUT MUNIF CHATIB

1970 ◽  
Vol 2 (2) ◽  
pp. 85-108
Author(s):  
Ni’matul Khasanah
Keyword(s):  
Content Analysis ◽  
Human Resources ◽  
Lesson Plan ◽  
Qualitative Approach ◽  
Optimal Management ◽  
Guardian Angel ◽  
Humanistic Approach ◽  
Data Content ◽  
Teacher Reports

The background of this research is the fact that the management of improving teacher‟s professionalism is still not effective. The role of teacher as planner, implementer, and developer of curriculum is also not optimal. Management of teachers is needed because teachers have a significant role in the success of learning process. This research was aimed at knowing Guardian Angel‟s concept of teacher management suggested by Munif Chatib and how it develops according to him. The implementation of Guardian Angel model of teacher management was presented through a testimony and direct interviews with Guardian Angel‟s trainees. This research used qualitative approach by studying Munif Chatib‟s books and direct interviews. Data were analyzed with content analysis, which included: (1) literary study of Munif Chatib‟s books, (2) description of Guardian Angel model of teacher management by Munif Chatib. This research found that (1) the concept of Guardian Angel teacher management uses humanistic approach, especially in regard to schedules of consultation, teaching strategies, and assessment through four kinds of teacher reports, including reports of morals, creativity, lesson plan, and student‟s learning results; (2) the basis used is the cornerstone of the scientific human resources and philosophical foundation that teachers carry out the work of teaching, which includes planning, teaching, evaluating, and learning. The first three points are teacher‟s obligations, while the last is their right. Penelitian ini dilatarbelakangi adanya keprihatinan manajemenpeningkatan profesionalitas guru yang belum berjalan efektif. Peranan guru sebagai perencana, pelaksana dan pengembang kurikulum yang belum optimal. Manajemen guru diperlukan mengingat bahwa peran guru amat signifikan bagi setiap keberhasilan proses pembelajaran.Penelitian ini mengungkap tentang manajemen guru Guardian Angel menurut Munif Chatib. Penelitian ini bertujuan untuk mengetahui konsep manajemen guru model Guardian Angel menurut Munif Chatib, dan berkembangannya Guardian Angel dalam pemikiran Munif Chatib. Implementasi manajemen guru model Guardian Angel dihadirkan melalui testimoni dan wawancara langsung dengan peserta pelatihan Guardian Angel. Penelitian ini menggunakan pendekatan kualitatif, dengan melakukan kajian terhadap buku - buku karya Munif Chatib dan wawancara langsung. Teknik anaisis data content analysis. Analisis meliputi: (1) kajian pustaka buku-buku karya Munif Chatib, (2) mendeskripsikan manajemen guru model Guardian Angel dalam pemikiran Munif Chatib.Hasil penelitian menunjukkan bahwa: (1) konsep model manajemen guru Guardian Angel menggunakan pola pendekatan manajemen humanis, terutama dalam jadwal konsultasi, strategi mengajar dan penilaian melalui empat rapor guru, yaitu rapor akhlak, rapor kreativitas, rapor lesson plan dan rapor hasil belajar siswa (2) landasan yang digunakan adalah landasan keilmuan sumber daya manusia dan landasan filosofi bahwa profesi guru mengemban pekerjaan manajemen, yaitu perencanaan , mengajar dan mengevaluasi dan belajar. Tiga hal pertama difahami sebagai kewajiban, sedangkan belajar dimaknai sebagai hak bagi seorang guru (3) Guardian Angel sebagai manajemen quality control yang meliputi: lesson plan, konsultasi, observasi dan umpan balik.

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