Supervised Machine Learning for Signals Having RRC Shaped Pulses

Classification performances of the supervised machine learning techniques such as support vector machines, neural networks and logistic regression are compared for modulation recognition purposes. The simple and robust features are used to distinguish continuous-phase FSK from QAM-PSK signals. Signals having root-raised-cosine shaped pulses are simulated in extreme noisy conditions having joint impurities of block fading, lack of symbol and sampling synchronization, carrier offset, and additive white Gaussian noise. The features are based on sample mean and sample variance of the imaginary part of the product of two consecutive complex signal values.Comment: 5 page

ROLE OF MARITIME STRATEGY IN RUSSIAN FOREIGN POLICY: A CASE STUDY OF BLACK SEA

Russia is using the Black Sea as a diplomatic tool in its foreign policy to achieve its maritime and foreign policy objectives, which are also linked with the country's strategic culture. This research investigates the significance of the Black Sea in Russia's Maritime Strategy for achieving its foreign policy objectives by using the balance of interest theory. This research employs two conceptual schemas. Firstly, with the help of maritime diplomacy, it analyses a tool to achieve foreign policy objectives in the waters. Secondly, the research uses the concept of strategic culture, which helps explore the diplomatic importance of the Black Sea in Russian foreign policy through the perspective of history and attitudes of decision-makers. This research highlights the case of the Black Sea for Russian maritime strategy, which also has a great economic significance for the region and world. It also highlights the importance of the Black Sea in the Russian maritime doctrine (2022) and links between maritime strategic culture and foreign policy objectives. It concludes that Russia is successfully pursuing its cooperative, coercive, and persuasive maritime diplomacy in the Black Sea region by providing humanitarian assistance, blocking Ukrainian access, and operating a stronghold at Sevastopol port as its naval base. In conclusion, this paper argues that strategic culture plays a vital role in employing the three diplomatic dimensions for achieving maritime objectives in the Black Sea.   Bibliography Entry Fatima Sherazi, Anees. 2023. "Role of Maritime Strategy in Russian Foreign Policy: A Case Study of Black Sea." Margalla Papers 27 (2): 115-124

Diastolic heart failure: Predictors of mortality

Diastolic heart failure (HF) as defined by the symptoms and signs of HF, preserved ejection fraction and abnormal diastolic function is estimated to occur in half of all patients presenting with HF. Patients with preserved ejection fraction are older and more often female. The underlying etiology of HF differs, with hypertension being more common in patients with preserved ejection fraction and ischemic heart disease predominant among those with reduced ejection fraction. Diastolic HF is associated with high mortality comparable with that of HF with depressed ejection fraction with a five year survival rate after a first episode of 43% and a higher excess mortality compared with the general population. Despite significant disease burden, clinical and biological prognostic factors in diastolic HF remain poorly understood. There is limited data from well designed studies regarding the effective treatment strategies for this group of patients. The purpose of this review is to summarize the mortality data and predictors of mortality in patients with diastolic HF for better understanding of the prognosis. In patients with diastolic HF older age, male gender, non-Caucasian ethnicity, history of coronary artery disease and atrial fibrillation are associated with poor prognosis. Anemia and B-type natriuretic peptide are significant laboratory variable that predict mortality. Two dimensional echocardiography and tissue Doppler imaging measurements including left ventricular ejection fraction, E/Ea ratio &#8805; 15, restrictive transmiral filling (deceleration time &#163; 140 ms) and Em < 3.5 cm/s are predictors of adverse outcomes in diastolic HF patients. (Cardiol J 2011; 18, 3: 222&#8211;232

Exhaust Plume Flow Visualization for Qualitative Analysis of Engine Combustion Performance

This work explores use of Thermal Infrared Image based Flow Visualization (TIIFV) for qualitative analysis of gasoline engine combustion performance. It proposes determining engine combustion performance through analysis of the exhaust plume turbulence and radiation extinction patterns. The employed methodology requires estimating the point spread function (PSF) prevailing in a LWIR image and using the PSF estimates for enhancing the engine exhaust plume LWIR images. Influence of exhaust plume composition on the plume flow characteristics, made evident by the turbulence and radiation extinction patterns, is then ascertained. The observed plume flow characteristics and underlying flow patterns are used to qualitatively determine the engine combustion performance. Results suggest that engine exhaust flow visualization can help in qualitative analysis of combustion performance from a distance and our reliance on photochemical-based analysis of gasoline engine combustion efficiency can be reduced. Thus a time consuming and untidy process, difficult to be carried out in real life situations, may be replaced with a swift and cleaner one

A study of methods of evaluating multimedia materials for language learning

There is a long tradition of paper based materials evaluation in ELT, but at this juncture, a scarcity of studies on ELT Multimedia (MM) materials evaluation. Such studies as have been undertaken have tended to adopt the perspective of the materials developer rather than the end user. But there have been no developed studies of evaluation methods which could be adopted by potential users. Despite calls being made for systematic evaluation, not many proposals have been developed, and there has been little exploration of potential best practice, or of the 'goodness of fit' between methods and evaluation puposes. This study aims to investigate evaluation methods in order to establish best practice in the evaluation of multimedia CALL applications, with a focus on learners' experience and opinions, and with the aim of enabling potential teacher-users of CALL materials to gauge the suitability of materials for their learners. Chapter one of this thesis provides a rationale for this study and an overview of the background to this research. Chapter two presents a review of literature undertaken in four domains: educational evaluation and research methods; Human Computer Interaction (HCI) usability evaluation methods; ELT materials evaluation; and studies ofCALL materials in use. Chapter three focuses on the design and conduct of the study by explaining how some methods of evaluation were trialled in a pilot study and four were selected for adoption and analysis in the main study. The methods selected were Foeu.r Groups, Rttrospective Protorolr, PLUM and SUM! Questionnaires and Activity Monitonitg. To determine the qualities and limitations of these methods, a set of criteria was developed from the literature on software usability evaluation methods in HCI and a broader literature on educational evaluation and research methods. The four data study chapters (4-7) each discuss one of the chosen methods and descnbe how the method was ,6perationalised in an evaluation of learner responses to multimedia software. The final chapter draws together the discussion of the findings and presents different proposals for best practice. The focus in the discussion of findings is on how the chosen methods performed according to the set of criteria. The findings confirm that focus groups and questionnaires are quick and efficient methods whereas retrospective protocols and activity monitoring provide more detailed and protracted data. Teacher evaluators can be guided by the objectives of their evaluation to explore different combinations ofthese methods. Participants in the pilot were 12 ESL students from the University of Warwick and in the main study 45 Freshman/sophomore students from a university in Pakistan. The materials used to operationalise methods were the EASE CD-ROMS listening to Lectures and Seminar Skills 1: Presentations. The research contributes to the field in undertaking an in-depth and extensive study of evaluation methods applicable to CALL materials, whi~ adopt a leamer-centred perspective, and conform to sound principles within educational evaluation, yet which draw on practice in the field of HCI, since this expertise is so relevant in the rapid development of multimedia materials for use in ELT. Moreover, by developing the composite set of core criteria this study has created a tool which practitioners in the field can use to select most appropriate methods for their particular evaluation purposes

Critical Discourse Analysis of Power Struggle and Marxism Theory in Hwang Dong Hyuk’s Series Squid Game

This paper attempts to explore the abuse of power and powerlessness in the discourse of Hwang Dong Hyuk’s series squid game according to Marxism. The main focus of the paper is how powerless people are targeted through communication and are tricked to believe that they can also be rich and be able to live easy lives if they do what they are told to. It is clear that in today’s society poor class has to follow every order of the elite class in order to survive. The powerlessness of the poor and abuse of power of the elite is clearly shown in this series. By CDA of the selective text it is clear that two classes are being discussed, poor class and elite class. Elite giving orders and poor following them. Abuse of power is clear where it is said by the rich person that he never forced them to play the game. You came back on your own accord. The elite living in luxury is manipulating the poor for his own entertainment. Marxism clearly fits in this situation. If they had power or money of their own, they would have never resorted to such methods. Fairclough 3D model 1992 can also be taken into perspective. As the murder was practiced by a single criminal in that game and some of them also got into doing so

A Comprehensive Survey on RF Energy Harvesting: Applications and Performance Determinants

\ua9 2022 by the authors. Licensee MDPI, Basel, Switzerland.There has been an explosion in research focused on Internet of Things (IoT) devices in recent years, with a broad range of use cases in different domains ranging from industrial automation to business analytics. Being battery-powered, these small devices are expected to last for extended periods (i.e., in some instances up to tens of years) to ensure network longevity and data streams with the required temporal and spatial granularity. It becomes even more critical when IoT devices are installed within a harsh environment where battery replacement/charging is both costly and labour intensive. Recent developments in the energy harvesting paradigm have significantly contributed towards mitigating this critical energy issue by incorporating the renewable energy potentially available within any environment in which a sensor network is deployed. Radio Frequency (RF) energy harvesting is one of the promising approaches being investigated in the research community to address this challenge, conducted by harvesting energy from the incident radio waves from both ambient and dedicated radio sources. A limited number of studies are available covering the state of the art related to specific research topics in this space, but there is a gap in the consolidation of domain knowledge associated with the factors influencing the performance of RF power harvesting systems. Moreover, a number of topics and research challenges affecting the performance of RF harvesting systems are still unreported, which deserve special attention. To this end, this article starts by providing an overview of the different application domains of RF power harvesting outlining their performance requirements and summarizing the RF power harvesting techniques with their associated power densities. It then comprehensively surveys the available literature on the horizons that affect the performance of RF energy harvesting, taking into account the evaluation metrics, power propagation models, rectenna architectures, and MAC protocols for RF energy harvesting. Finally, it summarizes the available literature associated with RF powered networks and highlights the limitations, challenges, and future research directions by synthesizing the research efforts in the field of RF energy harvesting to progress research in this area

Estimating Anthropometric Soft Biometrics: An Empirical Method

\ua9 2023, Tech Science Press. All rights reserved.Following the success of soft biometrics over traditional biomet-rics, anthropometric soft biometrics are emerging as candidate features for recognition or retrieval using an image/video. Anthropometric soft biometrics uses a quantitative mode of annotation which is a relatively better method for annotation than qualitative annotations adopted by traditional biometrics. However, one of the most challenging tasks is to achieve a higher level of accuracy while estimating anthropometric soft biometrics using an image or video. The level of accuracy is usually affected by several contextual factors such as overlapping body components, an angle from the camera, and ambient conditions. Exploring and developing such a collection of anthropometric soft biometrics that are less sensitive to contextual factors and are relatively easy to estimate using an image or video is a potential research domain and it has a lot of value for improved recognition or retrieval. For this purpose, anthro-pometric soft biometrics, which are originally geometric measurements of the human body, can be computed with ease and higher accuracy using landmarks information from the human body. To this end, several key contributions are made in this paper; i) summarizing a range of human body pose estimation tools used to localize dozens of different multi-modality landmarks from the human body, ii) a critical evaluation of the usefulness of anthropometric soft biometrics in recognition or retrieval tasks using state of the art in the field, iii) an investigation on several benchmark human body anthropometric datasets and their usefulness for the evaluation of any anthropometric soft biometric system, and iv) finally, a novel bag of anthropometric soft biomet-rics containing a list of anthropometrics is presented those are practically possible to measure from an image or video. To the best of our knowledge, anthropometric soft biometrics are potential features for improved seamless recognition or retrieval in both constrained and unconstrained scenarios and they also minimize the approximation level of feature value estimation than traditional biometrics. In our opinion, anthropometric soft biometrics constitutes a practical approach for recognition using closed-circuit television (CCTV) or retrieval from the image dataset, while the bag of anthropometric soft biometrics presented contains a potential collection of biometric features which are less sensitive to contextual factors

Biological Role of Cobalt(II), Copper(II) and Nickel(II) Metal Ions on the Antibacterial Properties of Some Nicotinoyl-Hydrazine Derived Compounds

Several cobalt(II), copper(II) and nickel(II) complexes of nicotinoylhydrazine-derived compounds were prepared and characterised by physical, spectral and analytical data. These compounds and their complexes have proven to be antibacterial. The screening data show the metal complexes to be more potential/bactericidal than the uncomplexed compounds against one or more bacterial species

ROLE OF MARITIME STRATEGY IN RUSSIAN FOREIGN POLICY: A CASE STUDY OF BLACK SEA

Russia is using the Black Sea as a diplomatic tool in its foreign policy to achieve its maritime and foreign policy objectives, which are also linked with the country's strategic culture. This research investigates the significance of the Black Sea in Russia's Maritime Strategy for achieving its foreign policy objectives by using the balance of interest theory. This research employs two conceptual schemas. Firstly, with the help of maritime diplomacy, it analyses a tool to achieve foreign policy objectives in the waters. Secondly, the research uses the concept of strategic culture, which helps explore the diplomatic importance of the Black Sea in Russian foreign policy through the perspective of history and attitudes of decision-makers. This research highlights the case of the Black Sea for Russian maritime strategy, which also has a great economic significance for the region and world. It also highlights the importance of the Black Sea in the Russian maritime doctrine (2022) and links between maritime strategic culture and foreign policy objectives. It concludes that Russia is successfully pursuing its cooperative, coercive, and persuasive maritime diplomacy in the Black Sea region by providing humanitarian assistance, blocking Ukrainian access, and operating a stronghold at Sevastopol port as its naval base. In conclusion, this paper argues that strategic culture plays a vital role in employing the three diplomatic dimensions for achieving maritime objectives in the Black Sea.   Bibliography Entry Fatima Sherazi, Anees. 2023. "Role of Maritime Strategy in Russian Foreign Policy: A Case Study of Black Sea." Margalla Papers 27 (2): 115-124