The Presence of Modernist Architecture in Government’s educational Buildings at Lefkosa

Modernist architecture movement of the buildings in any city reflects the modernity of that city. Lefkosa as a modern city faced many conflicts in the last century. The governmental buildings illustrate how modernism in architecture was defined and reflected in the buildings of the city. The aim of this paper is to explore the modernism movement in architecture influence on educational governmental buildings in Lefkosa for the first half in the 20th century. The paper focuses on the ideas and experiences of modernist architects in the first half of the 20th century to apply modernism elements and relationship between architecture form and functionalism in governmental buildings. Methodology framework elucidated to conduct the subject. Two School buildings have been selected from the first half of the twentieth century in Lefkosa as case studies for modernist architecture. ‘Lefkosa türk lisesi’ designed by ‘Ahmet Vural Bahaedden’, which was one of the famous modernist architects in Cyprus and ‘sehit Ertugrul Ilkokulu’. The buildings architectural elements analyzed in both schools to demonstrate the relationship between site, interior space, functionality and environmental response, based on using their modern material and character. The paper concluded that the educational buildings hold strong elements of the modernist architecture in Lefkosa and demonstrate how the elements of modernism were involved functionally in the design. The findings contribute useful evidence about the existence of modernism philosophy in architecture in Lefkosa in the first half of the twentieth century

The Presence of Modernist Architecture in Government\u27s Educational Buildings at Lefkoşa

Modernist architecture movement of the buildings in any city reflects the modernity of that city. Lefkoşa as a modern city faced many conflicts in the last century. The governmental buildings illustrate how modernism in architecture was defined and reflected in the buildings of the city. The aim of this paper is to explore the modernism movement in architecture influence on educational governmental buildings in Lefkoşa for first half in 20th century. The paper focuses on the ideas and experiences of modernist architects in first half of 20th century to apply modernism elements, and relationship between architecture form and functionalism in governmental buildings. Methodology frame work elucidated to conduct the subject. Two School buildings have been selected from the first half of twentieth century in Lefkoşa as case studies for modernist architecture. ‘Lefkoşa türk lisesi\u27 designed by ‘Ahmet vural Bahaedden\u27, which was the one of famous modernist architects in Cyprus and ‘Şehit Ertuğrul Ilkokulu\u27. The buildings architectural elements analyzed in both schools to demonstrate relation between site, interior space, functionality and environmental response, based on using their modern material and character. The paper concluded that the educational buildings hold strong elements of the modernist architecture in Lefkoşa and demonstrate how the elements of modernism were involved functionally in the design. The findings contribute useful evidence about the existence of modernism philosophy in architecture in Lefkoşa in the first half of twentieth century

Resource management for power-constrained HEVC transcoding using reinforcement learning

The advent of online video streaming applications and services along with the users' demand for high-quality contents require High Efficiency Video Coding (HEVC), which provides higher video quality and more compression at the cost of increased complexity. On one hand, HEVC exposes a set of dynamically tunable parameters to provide trade-offs among Quality-of-Service (QoS), performance, and power consumption of multi-core servers on the video providers' data center. On the other hand, resource management of modern multi-core servers is in charge of adapting system-level parameters, such as operating frequency and multithreading, to deal with concurrent applications and their requirements. Therefore, efficient multi-user HEVC streaming necessitates joint adaptation of application- and system-level parameters. Nonetheless, dealing with such a large and dynamic design space is challenging and difficult to address through conventional resource management strategies. Thus, in this work, we develop a multi-agent Reinforcement Learning framework to jointly adjust application- and system-level parameters at runtime to satisfy the QoS of multi-user HEVC streaming in power-constrained servers. In particular, the design space, composed of all design parameters, is split into smaller independent sub-spaces. Each design sub-space is assigned to a particular agent so that it can explore it faster, yet accurately. The benefits of our approach are revealed in terms of adaptability and quality (with up to to 4x improvements in terms of QoS when compared to a static resource management scheme), and learning time (6 x faster than an equivalent mono-agent implementation). Finally, we show that the power-capping techniques formulated outperform the hardware-based power capping with respect to quality

Machine Learning-Based Quality-Aware Power and Thermal Management of Multistream HEVC Encoding on Multicore Servers

The emergence of video streaming applications, together with the users’ demand for high-resolution contents, has led to the development of new video coding standards, such as High Efficiency Video Coding (HEVC). HEVC provides high efficiency at the cost of increased complexity. This higher computational burden results in increased power consumption in current multicore servers. To tackle this challenge, algorithmic optimizations need to be accompanied by content-aware application-level strategies, able to reduce power while meeting compression and quality requirements. In this paper, we propose a machine learning-based power and thermal management approach that dynamically learns and selects the best encoding configuration and operating frequency for each of the videos running on multicore servers, by using information from frame compression, quality, encoding time, power, and temperature. In addition, we present a resolution-aware video assignment and migration strategy that reduces the peak and average temperature of the chip while maintaining the desirable encoding time. We implemented our approach in an enterprise multicore server and evaluated it under several common scenarios for video providers. On average, compared to a state-of-the-art technique, for the most realistic scenario, our approach improves BD-PSNR and BD-rate by 0.54 dB, and 8%, respectively, and reduces the encoding time, power consumption, and average temperature by 15.3%, 13%, and 10%, respectively. Moreover, our proposed approach increases BD-PSNR and BD-rate compared to the HEVC Test Model (HM), by 1.19 dB and 24%, respectively, without any encoding time degradation, when power and temperature constraints are relaxed

Thermal Characterization of Next-Generation Workloads on Heterogeneous MPSoCs

Next-generation High-Performance Computing (HPC) applications need to tackle outstanding computational complexity while meeting latency and Quality-of-Service constraints. Heterogeneous Multi-Processor Systems-on-Chip (MPSoCs), equipped with a mix of general-purpose cores and reconfigurable fabric for custom acceleration of computational blocks, are key in providing the flexibility to meet the requirements of next-generation HPC. However, heterogeneity brings new challenges to efficient chip thermal management. In this context, accurate and fast thermal simulators are becoming crucial to understand and exploit the trade-offs brought by heterogeneous MPSoCs. In this paper, we first thermally characterize a next-generation HPC workload, the online video transcoding application, using a highly-accurate Infra-Red (IR) microscope. Second, we extend the 3D-ICE thermal simulation tool with a new generic heat spreader model capable of accurately reproducing package surface temperature, with an average error of 6.8% for the hot spots of the chip. Our model is used to characterize the thermal behaviour of the online transcoding application when running on a heterogeneous MPSoC. Moreover, by using our detailed thermal system characterization we are able to explore different application mappings as well as the thermal limits of such heterogeneous platforms

Enhancing Two-Phase Cooling Efficiency through Thermal- Aware Workload Mapping for Power-Hungry Servers

The power density and, consequently, power hungriness of server processors is growing by the day. Traditional air cooling systems fail to cope with such high heat densities, whereas single-phase liquid-cooling still requires high mass flowrate, high pumping power, and large facility size. On the contrary, in a micro-scale gravity-driven thermosyphon attached on top of a processor, the refrigerant, absorbing the heat, turns into a two-phase mixture. The vapor-liquid mixture exchanges heat with a coolant at the condenser side, turns back to liquid state, and descends thanks to gravity, eliminating the need for pumping power. However, similar to other cooling technologies, thermosyphon efficiency can considerably vary with respect to workload performance requirements and thermal profile, in addition to the platform features, such as packaging and die floorplan. In this work, we first address the workload- and platform-aware design of a two-phase thermosyphon. Then, we propose a thermal-aware workload mapping strategy considering the potential and limitations of a two-phase thermosyphon to further minimize hot spots and spatial thermal gradients. Our experiments, performed on an 8-core Intel Xeon E5 CPU reveal, on average, up to 10ºC reduction in thermal hot spots, and 45% reduction in the maximum spatial thermal gradient on the die. Moreover, our design and mapping strategy are able to decrease the chiller cooling power at least by 45%

A Machine Learning-Based Strategy for Efficient Resource Management of Video Encoding on Heterogeneous MPSoCs

The design of new streaming systems is becoming a major area of research to deploy services targeted in the Internet-of-Things (IoT) era. In this context, the new High Efficiency Video Coding (HEVC) standard provides high efficiency and scalability of quality at the cost of increased computational complexity for edge nodes, which is a new challenge for the design of IoT systems. The usage of hardware acceleration in conjunction with general-purpose cores in Multiprocessor Systems-on-Chip (MPSoCs) is a promising solution to create heterogeneous computing systems to manage the complexity of real-time streaming for high-end IoT systems, achieving higher throughput and power efficiency when compared to conventional processors alone. Furthermore, Machine Learning (ML) provides a promising solution to efficiently use this next-generation of heterogeneous MPSoC designs that the EDA industry is developing by dynamically optimizing system performance under diverse requirements such as frame resolution, search area, operating frequency and stream allocation. In this work, we propose an ML-based approach for stream allocation and Dynamic Voltage and Frequency Scaling (DVFS) management on a heterogeneous MPSoC composed of ARM cores and FPGA fabric containing hardware accelerators for the motion estimation of HEVC encoding. Our experiments on a Zynq7000 SoC outline 20% higher throughput when compared to the state-of-the-art streaming systems for next-generation IoT devices