21 research outputs found
A new ranking methodology based on hierarchical cluster analysis
No full textÜlengin, Füsun (Dogus Author) -- Önsel, Şule (Dogus Author) -- Conference full title: 2008 3rd International Conference on Intelligent System and Knowledge Engineering, ISKE 2008; Xiamen; China; 17 November 2008 through 19 November 2008This paper provides a methodology to rank competing entities in terms of their overall performance. Similarities of the entities are used for ranking. The methodology is composed of three stages. Initially, the data is standardized. Secondly, hierarchical cluster analysis is conducted to capture the similarities among the entities. Then a linear programming model is run for final rankings. Furthermore a benchmark example with sensitivity analysis is given to illustrate the methodology and to show its applicability
Evolutionary data selection for enhancing models of intraday forex time series
No full textThe hypothesis in this paper is that a significant amount of intraday market data is either noise or redundant, and that if it is eliminated, then predictive models built using the remaining intraday data will be more accurate. To test this hypothesis, we use an evolutionary method (called Evolutionary Data Selection, EDS) to selectively remove out portions of training data that is to be made available to an intraday market predictor. After performing experiments in which data-selected and non-data-selected versions of the same predictive models are compared, it is shown that EDS is effective and does indeed boost predictor accuracy. It is also shown in the paper that building multiple models using EDS and placing them into an ensemble further increases performance. The datasets for evaluation are large intraday forex time series, specifically series from the EUR/USD, the USD/JPY and the EUR/JPY markets, and predictive models for two primary tasks per market are built: intraday return prediction and intraday volatility prediction
Ethiopia Between Speech and Writing. A Not Solely Intellectual Dispute Between the Emperor and a Writer About the Concepts of the State
No full textFikir Iske Mekabir (Love To The Grave) is amongst the most important novels written in Amharic. Its author, Haddis Alemayehu, was an Ethiopian writer, statesman and a representative of the intellectual elite during the period of Emperor Haile Sellassie I (1930–1974). The aim of the article is to analyse the preface to the novel, where the author proposes a reform of the Ethiopian writing system as an example of the then expected changes, which were supposed to make the state administration more efficient. The analysis of the text is proposed along with a description of the period in which the Ethiopian Empire was to be transformed from the traditional model of administration and state rule towards one of modernity, as it is broadly understood
Microbiome Composition and Function in Aquatic Vertebrates: Small Organisms Making Big Impacts on Aquatic Animal Health
No full textInternational audienceAquatic ecosystems are under increasing stress from global anthropogenic and natural changes, including climate change, eutrophication, ocean acidification, and pollution. In this critical review, we synthesize research on the microbiota of aquatic vertebrates and discuss the impact of emerging stressors on aquatic microbial communities using two case studies, that of toxic cyanobacteria and microplastics. Most studies to date are focused on host-associated microbiomes of individual organisms, however, few studies take an integrative approach to examine aquatic vertebrate microbiomes by considering both host-associated and free-living microbiota within an ecosystem. We highlight what is known about microbiota in aquatic ecosystems, with a focus on the interface between water, fish, and marine mammals. Though microbiomes in water vary with geography, temperature, depth, and other factors, core microbial functions such as primary production, nitrogen cycling, and nutrient metabolism are often conserved across aquatic environments. We outline knowledge on the composition and function of tissue-specific microbiomes in fish and marine mammals and discuss the environmental factors influencing their structure. The microbiota of aquatic mammals and fish are highly unique to species and a delicate balance between respiratory, skin, and gastrointestinal microbiota exists within the host. In aquatic vertebrates, water conditions and ecological niche are driving factors behind microbial composition and function. We also generate a comprehensive catalog of marine mammal and fish microbial genera, revealing commonalities in composition and function among aquatic species, and discuss the potential use of microbiomes as indicators of health and ecological status of aquatic ecosystems. We also discuss the importance of a focus on the functional relevance of microbial communities in relation to organism physiology and their ability to overcome stressors related to global change. Understanding the dynamic relationship between aquatic microbiota and the animals they colonize is critical for monitoring water quality and population health
Business models: Tooling and a research agenda
No full textInfrastructures, Systems and ServicesTechnology, Policy and Managemen
Microbiome Composition and Function in Aquatic Vertebrates: Small Organisms Making Big Impacts on Aquatic Animal Health
No full textAquatic ecosystems are under increasing stress from global anthropogenic and natural changes, including climate change, eutrophication, ocean acidification, and pollution. In this critical review, we synthesize research on the microbiota of aquatic vertebrates and discuss the impact of emerging stressors on aquatic microbial communities using two case studies, that of toxic cyanobacteria and microplastics. Most studies to date are focused on host-associated microbiomes of individual organisms, however, few studies take an integrative approach to examine aquatic vertebrate microbiomes by considering both host-associated and free-living microbiota within an ecosystem. We highlight what is known about microbiota in aquatic ecosystems, with a focus on the interface between water, fish, and marine mammals. Though microbiomes in water vary with geography, temperature, depth, and other factors, core microbial functions such as primary production, nitrogen cycling, and nutrient metabolism are often conserved across aquatic environments. We outline knowledge on the composition and function of tissue-specific microbiomes in fish and marine mammals and discuss the environmental factors influencing their structure. The microbiota of aquatic mammals and fish are highly unique to species and a delicate balance between respiratory, skin, and gastrointestinal microbiota exists within the host. In aquatic vertebrates, water conditions and ecological niche are driving factors behind microbial composition and function. We also generate a comprehensive catalog of marine mammal and fish microbial genera, revealing commonalities in composition and function among aquatic species, and discuss the potential use of microbiomes as indicators of health and ecological status of aquatic ecosystems. We also discuss the importance of a focus on the functional relevance of microbial communities in relation to organism physiology and their ability to overcome stressors related to global change. Understanding the dynamic relationship between aquatic microbiota and the animals they colonize is critical for monitoring water quality and population health
Data center power supply design
No full textAndmekeskuse kavandamisel lähtuti ISKE juhendist, kus oli esile toodud erinevate tasemete nõrgad kui ka tugevad küljed. Lõputöös analüüsiti erinevaid elektrivarustuse skeeme, lülitus viise ja varustuse tasemeid. Kuna H+ taset ei olnud võimalik teostada, siis võttis lõputöö autor aluseks H taseme ja kavandas sellest optimaalse versiooni. Selleks oli vaja valida katkematu puhvertoiteallikas ja generaator. Need valiti vastavalt arvutuslikule võimsusele. Katkematu puhvertoiteallikas sai valitud N+1 süsteemis. Kuna seadmed arenevad, siis valmis olevasse hoonesse võimsust juurde saada on üsna võimatu. Sellepärast on elektrivarustuse süsteem ka üle dimensioneeritud. Planeeritud sai elektrivarustus selliselt, et vajaduse korral on võimalik seadmeid juurde lisada. Diiselvarugeneraator, katkematu puhvertoiteallikas, lattliinid jms. on üle dimensioneeritud varuga 20%. Seda selleks, et elutähtsate tehnosüsteemide ja andmekeskuste seadmed jääksid tööle ka siis, kui ühe või teise ahelaga midagi juhtub. Tänu sellele suudab üks ahel teise töö üle võtta ilma, et peaks koormuseid vähendama. Serverikeskuse toimimiseks ja jahutamiseks valiti täppiskonditsioneerid ja selgitati nende vajalikkust ning õhu ringlemist foto abil. Töö autor kasutas töös erinevaid valemeid inseneri arvutuste tegemiseks. Nendest lähtuvalt saadi teada voolutugevused, lühisvoolud erinevates punktides ja pingelangud kaablites ning liini lõpus. Serverikeskusel on tähtis ahela riknemise korral töö jätkamine, arvutati ka katkematu puhvertoiteallika akude tugiaeg, milleks oli 30min. Andmekeskuse ohutuse tagamiseks planeeriti ruumi gaaskustutus, milleks osutus süsinik, fluori ja vesiniku keemiline ühend, mis kustutab tulekahju seadmeid rikkumata.Data center planning was basked on ISKE guide, which featured weak and strong points of various power supply levels. Thesis analyzed the various power schemes, switching modes, and levels of power supplies. Since H+ level was not feasible, then the authour of thesis chose the H level, and designed it for optimal version. It was necessary to choose an uninterruptible power supply and generator. They were selected according to the computational power. Uninterruptible power supply buffer was chosen N+1 system. As devices envolve they get more powerfull. To getmore power into building is quite impossible. That is why the power supply system is over-dimensione. Power was planned as, if necessary, more devices can be added. Diesel generator, uninterruptible power supply, busways etc. Are 20% over-dimensioned. This is so that critical equipment in data centers would work even if something happens to one or another chain. Due to this, one is able to take over the work of another chain without having to reduce the loads. Server operation and cooling of the data centre were selected and explained the necessity of the air circulation through the photo. The author used various formulas for engineering calculations. These formulas gave us current, short circuit currents and voltage drops on the cables at various points and at the end of the line. Data centre is important to work even if the chain is corrupted, so we had to calculate continuous uninterruptible power supply battery runtime, which was 30min. The data center was planned to ensure the safety of servers with fire extinguish system, which turned out to be a carbon, fluorine and hydrogen mix, a chemical compound that extinguishes the fire without harming the devices
COMPLEX OF ARTEFACTS OF SOUTHERN URALS BASHKIRS OF 18TH–19TH CENTURIES (ACCORDING TO DATA FROM IMSYAK-TAU-1 SETTLEMENT IN MOUNTAIN-STEPPE TRANSURALS)
No full textThe article presents the archaeological and paleosoil findings from the settlements dated 18th – 19th century. Imsyak-Tau-1 settlement is situated in the narrow strand of mountain steppes in the Southern Transurals (currently Abzelilovsky District, the Republic of Bashkortostan) on the bank of Bolshoy Kizil River. The monument was first discovered in 2000. The area was closely researched in 2022. The research shows remains of a permanent settlement with linear layouts and two key functional areas. The research totally registered 23 items. Most of them were reconstructed as above-ground housings based on their appearance. A significant amount of remains was collected from the surface. Mainly they were fragments of cast iron pots, various household items, single pottery and porcelain fragments. Pits reveal the cultural deposit within the top horizon only. Coins make the findings date back to the middle 18th century. Paleosoil research allows to determine that locally within the monument there is a lot porcelain (P2O5). It is evident of high anthropogenic load caused by substantial number of cattle. The analysis of 18th – 19th centuries map and historical resources shows that this settlement is an ‘old place’ (Bashkir: Iske uryn) for the contemporary village Ishkulovo (Bashkir tribe of Tangaurs). It had been abandoned by 1784. However, the analysis of the existing coins, including samples discovered in 2022, allows to date the monument within 1740s – 1860s. The studied cast iron pots prove their high chronological and partly ethnocultural significance. To date Imsyak-Tau-1 settlement is one of the few monuments in the Southern Urals to help describe the archaeologically registrable artefacts of Transurals Bashkirs of 18th – 19th century. © The Author(s) 2023.Russian Science Foundation, RSF: 22-28-00815Keywords: Southern Transurals, mountain steppe, Modern Age, Bashkirs, settlement layout, ethnos artefacts, soil science, historical cartography Citation.SavelevN.S., NikolaevS.Yu., RumyantsevM.M., RuslanovE.V., SavelevaA.G., SuleymanovR.R., KhurmaevA.A., KungurtsevA.Ya., 2023. Complex of Artefacts of Southern Urals Bashkirs of 18th – 19thCenturies (According to Data from Imsyak-Tau-1 Settlement in Mountain-Steppe Transurals). Ufimskij arkheologiches-kiy vestnik [Ufa Archaeological Herald]. Vol. 23, no. 2, pp. 300–319. (In Russ.). DOI: https://doi.org/10.31833/ uav/2023.23.2.009 Acknowledgements. The article was prepared with the support of the Russian Science Foundation grant No. 22-28-00815 “Comprehensive reconstruction of the development of the mountain steppes of the Southern Urals from the Stone Age to Modern times (socio-cultural and natural transformations)”
