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Artificial bee colony (ABC) algorithm is an optimization algorithm based on a particular intelligent behaviour of honeybee swarms. This work compares the performance of ABC algorithm with that of differential evolution (DE), particle swarm optimization (PSO) and evolutionary algorithm (EA) for multi-dimensional numeric problems. The simulation results show that the performance of ABC algorithm is comparable to those of the mentioned algorithms and can be efficiently employed to solve engineering problems with high dimensionality.

Abstract This study investigates the macroeconomic effects of adverse oil price shocks on a small oil-exporting economy — the Azerbaijan economy. We estimate a recursive (near) VAR model by using monthly macroeconomic data from 2006 to 2018. The results indicate the Azerbaijan economy is adversely influenced by an oil price decline. Specifically, we find that a negative oil price shock deteriorates trade balance, causes a currency depreciation, increases inflation and falls economic activity. Furthermore, our findings imply that the oil price-led devaluation shapes the inflationary and recessionary consequences of this shock.

Mahalle; sosyal hayatın yerlilik vurgusu yapan, kültürel, ekonomik açıdan benzer insanları bir araya getiren yahut benzemeyenleri yakınlaştıran, aidiyet hissini mekânla özdeşleştiren dinamik unsurlarından biridir. Kenar mahalle de bu dinamiğin içinde ekonomik, kültürel, ahlaki açıdan ve dil bakımından çevrede kalan; merkezle oluşan uzak mesafeyi gösteren, gündelik hayatı ayrıntılarıyla yansıtan müesseselerindendir. Bu yönüyle kentleşme olgusunun somutlaştığı zamanlardan itibaren edebi eserlerin önemli mekânlarından ve sosyolojinin ilgilendiği alanlardan biri olmuştur. Hüseyin Rahmi Gürpınar, Türk edebiyatında kent kimliğinin henüz yerleştiği dönemlerden itibaren kenar mahalleleri eserlerine yansıtan romancılardan biridir. Yazar, kenar mahallelerin ve buradaki insanların görünümlerini yazma anının gerçeklerine uygun bir bakışla dile getirirken kurguyu da bu gerçeklikten yola çıkarak şekillendirir. Yazarın kenar mahallelerde geçen romanlarında kurgu ve kurgudaki çatışma unsurları, buralarda yaşamakla doğrudan ilgilidir. Dolayısıyla kenar mahalle, yazarın dünyasında yalnızca bir mekân unsuru olmanın ötesinde sınıf farklılığının, canlı ve renkli kent hayatının, yoksulluğun, alt kültür pratiklerinin görüldüğü gündelik hayat müessesesidir. Bu makalede üretken bir yazar olan Hüseyin Rahmi Gürpınar’ın kenar mahalleleri, buralardaki insanları ve hayatları yansıtma bağlamında temsil değeri olan 13 romanı incelenecektir. Kenar mahallelerin nasıl tasvir edildiği, buralarda yaşayan ve romanların kişi kadrosunu oluşturan insanların ele alınma biçimleri üzerinde durulacaktır. Yazarın romanlarında kenar mahalleleri ele almasının sebepleri üzerinde durulacaktır. Hüseyin Rahmi Gürpınar’ın kenar mahalleleri ve insanlarını bir sınıf sorunsalı olarak değerlendirip değerlendirmediği de sorgulanacaktır. 

Abstract In this work we aim to predict quality levels of incoming batches of a selected product type to a white goods manufacturer from a third party supplier. We apply a Markov Model that captures the quality level of the incoming batch in order to predict the quality status of the future arrivals. The ultimate aim is to generate reliable predictions for the future incoming batches, so that the manufacturing company could warn its supplier if the predictions indicate a significant deterioration in the quality. Applied methodology is compared to several benchmark approaches and its superior performance is shown using a benchmark dataset from the literature and the dataset provided by the manufacturing company. Proposed algorithm performs better compared to benchmarks in detecting the instances with quality level falling outside the tolerances in the validation data; and proves itself as a promising approach for the company.

East Lisbon is being exposed to large-scale urban regeneration processes, where luxury residential projects and mixed-use spatial developments are already underway. Thus, it is a living laboratory for “smart”, “creative” and “green” projects, as well as related urban public space interventions. Braço de Prata is an urban space overlooked by developers, being surrounded by obsolete industrial buildings. Concerning the recent interest in international investments in brownfield regeneration and greenfield developments, it represents an attractive urban terrain as a post-industrial working-class neighbourhood, where “smart” and “green” suggest transforming space so that both new and old residents can live and work together and share public space regardless of analysis on their environmental recognitions. The aim of this paper is to present an empirical evaluation model that examines the possible impacts of environmental negligence through the reorganisation of the physical and social fabric. The analyses focus on dwellers’ moral understanding of their changing environment as site-specific domains to address the unique conditions that affect transiently defined presumptions about the collective needs. Taking an evaluative approach in the Braço de Prata case, this paper demonstrates the specific socio-ecological implications of urban inequality in post-industrial neighbourhoods that could be threatened by new decisions, both through urban planning approaches and instruments.

Abstract Hydro transport is characterized by the combined movement of liquid and solid particles, which in a mixture form two-phase or multiphase flows with different physical and mechanical properties. One of the main tasks of hydraulic transport is to study the throughput of pipelines, where taking into account the distribution of sediment concentration over the cross section of the pipeline formed under the influence of gravitational force is of great importance in describing the nature of the two-phase flow. Pressure-bearing suspended flows in hydro transport systems are usually characterized by high volumetric concentrations and a wide range of sizes and densities of solid particles that are part of hydraulic mixtures. The flows under consideration are more complex in their structure than turbulent flows of homogeneous liquids in pipes. Therefore, the methods for calculating these flows are much more complicated than the usual methods of hydraulics of pressure flows of homogeneous liquids. To develop scientif-ically based methods for calculating the parameters of the movement of hydraulic mixtures in pipes, widely used the averaged equations of the weighted flow and experimental data. When moving slurries through pipes, gravity plays a significant role. The article discusses the influence of gravity on the throughput of pressure systems with different slopes and obtains new dependences of the flow rate of turbid flow on the slope of the pressure pipe.

This paper is concerned with the risk management practices of an electricity retailer motivated by the Dutch electricity market. We examine the effectiveness of the existing base- and peak-load futures contracts as a risk management tool for the electricity retailers. We analytically characterize the retailer’s optimal hedging policy as a function of the serial correlation of the prices and the demand profiles of its customers. We find that the retailer typically over-hedges in the futures market, and the over-hedging amount increases when both base- and peak-load contracts are used. Our findings indicate that although the existing contracts in the futures market are quite efficient to replicate the exposure from profiled customers, when industrial consumers and renewable generation are included to the retailer’s portfolio, the effectiveness of such contracts decreases substantially. In our motivating example, hedging the risk of the profiled customers with base-load contracts, the firm may reduce the variance of its cash flows by 85.9%. In addition to the base-load contracts, including peak-load contracts into the hedging portfolio of the retailer increases the efficiency of hedging to 89.3%. However, when we consider the aggregate portfolio of the retailer including profiled customers, industrial consumers and renewable contracts, the efficiency of hedging through the existing futures contracts goes down as low as 32.8% during certain periods. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Sürdürülebilir Kalkınma Amaçları (SKA’lar), dünyanın karşı karşıya kaldığı çevresel, ekonomik ve sosyal sorunlarla mücadele edilmesine yardımcı olmak üzere Birleşmiş Milletler (BM) tarafından 2015 yılında kabul edilen amaç ve hedeflerden oluşmaktadır. Yüksek denetim kurumları (YDK’lar), sürdürülebilir kalkınma için etkili, hesap verebilir, şeffaf, etkin ve kapsayıcı kurumların merkezinde yer almakta olup bireysel yetki ve görevleri çerçevesinde SKA’ları takip eder ve gözden geçirirler. Sürdürülebilir kalkınmanın öneminin artması ile YDK’lar, çevreye ve çevre politikasına karşı rol ve sorumluluklarının farkına varmış ve çevre denetimi, YDK’ların denetim faaliyetlerinin önemli bir parçası haline dönüşmüştür. Çalışma YDK’ların çevre denetimini SKA’lar çerçevesinde ele almayı amaçlamakta olup çevre denetiminin SKA’lara nasıl katkıda bulunabileceğini incelemektedir. Bu kapsamda sürdürülebilir kalkınma ve YDK’lar arasındaki ilişkiye ilişkin literatürden, Çevre Denetimi Çalışma Grubu (Working Group of Environmental Auditing - WGEA) tarafından yayımlanan anket bulgularından ve YDK’ların denetim raporlarından yararlanarak konuya ilişkin yeni değerlendirmelerde bulunulmuştur. Çalışmada çevre denetiminin SKA’lara ulaşılmasına olumlu katkı yapabileceği, YDK’ların gözetim işlevlerini kullanarak SKA’ların uygulanması konusunda mali kaynakların etkin, etkili ve şeffaf harcanmasını teşvik edebileceği ve bu anlamda hükümetleri sorumlu tutabileceği ve bağımsız bilgiler sağlayabileceği belirlenmiştir.