[Winner] Cesar Pelli Architects & Associates

시저 펠리(Cesar Pelli) 현대건축사 2005 월간 CONCEPT Vol.- No.70

Energy Geo-Storage − Analysis and Geomechanical Implications

Cesar Pasten,J. Carlos Santamarina 대한토목학회 2011 KSCE JOURNAL OF CIVIL ENGINEERING Vol.15 No.4

The increasing energy demand, the mismatch between generation and load, and the growing use of renewable energy accentuate the need for energy storage. In this context, energy geo-storage provides various alternatives, the use of which depends on the quality of surplus energy. In terms of power and energy capacity, large mechanical energy storage systems such as Compressed Air Energy Storage (CAES) and Pumped Hydro Storage (PHS) are cost-effective and suitable for centralized power generation. In contrast,sensible and latent heat storage are appropriate for distributed applications when excess heat is involved. Energy density estimations highlight the advantages of compressed air over elevated water, and latent heat over sensible heat storage. From a geotechnical standpoint, the operation of geo-storage systems exerts complex effective stress, temperature, wet-dry, and freeze-thaw cycles. Although these excitations may not cause monotonic failure, they lead to ratcheting or shakedown behavior, both of which must be carefully analyzed to ensure the proper long-term cyclic response of energy geo-storage systems.

WhitenoneCoat Hypertension: the Neglected Subgroup in Hypertension

Cesare Cuspidi,Marijana Tadic,Giuseppe Mancia,Guido Grassi 대한심장학회 2018 Korean Circulation Journal Vol.48 No.7

The clinical prognostic importance of white coat hypertension (WCH), that is, the clinical condition characterized by an increase of office but a normal ambulatory or home blood pressure (BP) is since a long time matter of considerable debate. WCH accounts for a consistent portion of hypertensive patients (up to 30–40%), particularly when hypertension is mild or age is more advanced. Although scanty and inconsistent information is available on the response of office and out-office BP to antihypertensive treatment and the cardiovascular (CV) protection provided by treatment, an increasing body of evidence focusing on the association of WCH with CV risk factors, subclinical cardiac and extra-cardiac organ damage and, more importantly, with CV events indicates that the risk entailed by this condition is intermediate between true normotension and sustained hypertension. This review will address a number of issues concerning WCH with particular attention to prevalence and clinical correlates, relation with subclinical target organ damage and CV morbidity/mortality, therapeutic perspectives. Several topics covered in this review are based on data acquired over the past 20 years by the Pressioni Arteriose Monitorate E Loro Associazioni (PAMELA) study, a longitudinal survey performed by our group on the general population living in the surroundings of Milan area in the north part of Italy.

Connecting Northeast Asia: Renewable Energy and Prospects for Cooperation

Cesare M. Scartozzi,Roberto Orsi,Maximilian Ernst,Henry Martin 경남대학교 극동문제연구소 2021 ASIAN PERSPECTIVE Vol.45 No.4

This article assesses the significance of renewable energy technologies in the integration of the Northeast Asian energy sector. First, it provides a country-level analysis of renewable energy trends in China, Korea, and Japan. Then, it analyzes how domestic trends are linked from a regional perspective, highlighting opportunities and challenges posed by renewable energy technologies. Finally, it assesses the current state of affairs in energy cooperation and provides an appraisal of future developments, with particular attention to the issue of grid connectivity.

A genomic glimpse of B chromosomes in cichlids

Cesar Martins,Maryam Jehangir 한국유전학회 2021 Genes & Genomics Vol.43 No.3

Background B chromosomes (Bs) are extra karyotype elements in addition to A chromosomes and are found in all major eukaryotic taxa. Among hundreds of investigated species, cichlid fshes have emerged as an interesting group of model and have contributed to unravel the complex biology of B chromosome. Objective We review the current state of knowledge on B chromosome investigation in cichlid fsh and discuss the recent genomic advances over gene and sequences hunting on Bs and their impact on the current concept of B chromosomes. Results The Bs of cichlids have been under the subject of classical cytogenetics and high scale DNA, RNA and epigenetics analysis and a list of B chromosome genes and functional sequences has been generated. B chromosomes of cichlids are restricted to females in some species and are enriched with genes, relics of genes, transposable elements and sequences transcribing for many signifcant biological functions. Diverse potentially functional sequences have been described in the B chromosome of cichlids and could infuence important biological characteristics as well seems to afect transcription and epigenetic modifcations of the whole genome. Conclusion One of the most enigmatic characteristics of Bs in cichlids is their genic content related to cell cycle and chromosome structure, and their infuence over sex rates. The relationship of Bs with cell cycle and sex determination looks like to be connected with the drive of the Bs during cell divisions.

Common models and approaches for the clinical educator to plan effective feedback encounters

Cesar Orsini,Veena Rodrigues,Jorge Tricio,Margarita Rosel 한국보건의료인국가시험원 2022 보건의료교육평가 Vol.19 No.-

Giving constructive feedback is crucial for learners to bridge the gap between their current performance and the desired standards of competence. Giving effective feedback is a skill that can be learned, practiced, and improved. Therefore, our aim was to explore models in clinical settings and assess their transferability to different clinical feedback encounters. We identified the 6 most common and accepted feedback models, including the Feedback Sandwich, the Pendleton Rules, the One-Minute Preceptor, the SET-GO model, the R2C2 (Rapport/Reaction/Content/Coach), and the ALOBA (Agenda Led Outcome-based Analysis) model. We present a handy resource describing their structure, strengths and weaknesses, requirements for educators and learners, and suitable feedback encounters for use for each model. These feedback models represent practical frameworks for educators to adopt but also to adapt to their preferred style, combining and modifying them if necessary to suit their needs and context.

A new approach to measure the elasticity modulus for ceramics using the deformation energy method

Cesar R. Foschini,Edson A. C. Souza,Ana F. S. Borges,Carlos A. F. Pintão 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.8

This paper presents an alternative method to measure the modulus of elasticity to traction, E, for relatively limited sample sizes. We constructed a measurement system with a Force sensor (FS) and a Rotation movement sensor (RMS) to obtain a relationship between force (F) and bending (ΔL). It was possible by calculating the strain energy and the work of a constant force to establish a relationship between these quantities; the constant of proportionality in this relationship depends on E, I and L. I and L are the moment of inertia of the uniform cross-section in relation to an oriented axis and length, respectively, of the sample for bending. An expression that could achieve the value of E was deduced to study samples of Y-TZP ceramics. The advantages of this system compared to traditional systems are its low cost and practicality in determining E.

Gaofen-1 WFV 영상을 이용한 딥러닝 기반 대형 부유조류 분류

김의현,김근용,김수미,유주형,Kim, Euihyun,Kim, Keunyong,Kim, Soo Mee,Cui, Tingwei,Ryu, Joo-Hyung 대한원격탐사학회 2020 大韓遠隔探査學會誌 Vol.36 No.2

매년 황해와 동중국해에서는 대형 부유조류인 녹조와 갈조가 대량으로 발생하고 있다. 이러한 대형 부유조류는 연안의 양식 시설물이나 해변으로 유입되며, 제거하는데 막대한 경제적 손실을 발생시킨다. 현재는 연안으로 유입되는 대형 부유조류를 탐지하기 위해 원격탐사 방법이 활발하게 사용되고 있다. 그러나 대형 부유조류는 해양의 다양한 대상들과 중첩되는 파장이 존재하기에 이를 정확하게 탐지하는데 한계가 있다. 더욱이 녹조와 갈조는 유사한 스펙트럼 특성을 보이기 때문에 원격탐사 자료를 이용한 구분을 더욱 어렵게 만든다. 따라서 본 연구에서는 위성 영상에 딥러닝 기법을 적용하여 녹조와 갈조를 효과적으로 구분하고자 하였다. 이를 위한 네트워크를 결정하기 위해 최적의 학습 조건을 찾아 AlexNet 신경망을 전이 학습하였으며, 학습과 검증을 위해 Gaofen-1 WFV 영상을 이용하여 데이터셋을 구성하였다. 최적의 학습 조건으로 학습된 네트워크를 이용하여 실험 데이터에 대한 결과를 확인하였다. 그 결과 실험 데이터에 대한 정확도는 88.89%를 보였으며, 녹조와 갈조에 대해 각각 66.67%와 100%의 정밀도로 구분이 가능하였다. 이는 전이 학습된 AlexNet 신경망이 녹조와 갈조의 미세한 차이를 구분할 수 있는 것으로 해석된다. 본 연구를 통해 해양의 다양한 대상으로부터 녹조와 갈조를 효과적으로 분류하고 각각 구분할 수 있을 것으로 기대된다. Every year, the floating macroalgae, green and golden tide, are massively detected at the Yellow Sea and East China Sea. After influx of them to the aquaculture facility or beach, it occurs enormous economic losses to remove them. Currently, remote sensing is used effectively to detect the floating macroalgae flowed into the coast. But it has difficulties to detect the floating macroalgae exactly because of the wavelength overlapped with other targets in the ocean. Also, it is difficult to distinguish between green and golden tide because they have similar spectral characteristics. Therefore, we tried to distinguish between green and golden tide applying the Deep learning method to the satellite images. To determine the network, the optimal training conditions were searched to train the AlexNet. Also, Gaofen-1 WFV images were used as a dataset to train and validate the network. Under these conditions, the network was determined after training, and used to confirm the test data. As a result, the accuracy of test data is 88.89%, and it can be possible to distinguish between green and golden tide with precision of 66.67% and 100%, respectively. It is interpreted that the AlexNet can be pick up on the subtle differences between green and golden tide. Through this study, it is expected that the green and golden tide can be effectively classified from various objects in the ocean and distinguished each other.

3D Free-space Antenna Radiation Pattern Reconstruction from Non-anechoic Measurements using Impulse Response Method

Cesar Segura(시저웨슬리),K Kang(강경목),K Seol(설경은),J Koh(고진환) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6

Several techniques for radiation pattern reconstruction to obtain free-space antenna radiation pattern are Time Reversal algorithm, Spherical Waves decomposition, FFT, matrix Pencil, Chebyshev polynomials and Hilbert Transform. These methods are a set of algorithms that when implemented avoid the use of anechoic chamber which is a standard in communication equipment certification. The objective of this paper is to investigate Impulse Response methodology for obtaining 3D free-space results from non-anechoic measurements. Two antenna configurations are studied to see effects of walls and floor specular reflections. Three standard test antennas (AUT) are simulated: Horn, Yagi and Helical. Fingerprints and pattern error show reconstruction accuracy of 3D Impulse Response over FFT method.

Modulation-Agnostic Spectrum Sensing based on Anomaly detection for Cognitive Radio

Cesar Pablos,Ángel G. Andrade,Guillermo Galaviz 한국통신학회 2023 ICT Express Vol.9 No.3

This work proposes a Spectrum Sensing (SS) scheme based on a Convolutional Autoencoder (CAE) for application in Cognitive Radio Networks. The channel occupancy is modeled as an anomaly detection problem. The CAE is trained only with noise-signal samples so that any random modulated signal observed in the wireless channel will be regarded as an outlier. The relationship between the detection threshold and the system performance is evaluated. Experiments demonstrate that the SS proposal can identify primary signal presence with better accuracy (high detection and low false alarm rate) than conventional Energy Detection.