cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Understanding the Importance of Onboarding at a Large, Research-Intensive University in Western Canada
Creators: name: Mardjetko, Andrew
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Onboarding
subject: Pre-onboarding
subject: Human Resources
subject: Organizational Culture
subject: Socialization
subject: Four C's of Onboarding
subject: Training and Development
subject: Professional Development
subject: Experiential Learning
subject: Adult Learning
subject: Education
subject: Education--Adult and Continuing
subject: Education--Business

description: Onboarding programs are understood as fundamental training required by a new employee to successfully integrate into an organization and their role. Onboarding programs have been shown to contribute to employee effectiveness and can influence worker retention and impact organizational culture. Yet while onboarding has such a strong impact on many significant factors within an organization, many companies view onboarding as an inconsequential portion of a new employee’s welcome into the institution. In this research study, I engaged in a qualitative, single instrumental case study, collecting onboarding information from a large, research-intensive university in western Canada. This study was guided by one research question: Do current onboarding processes at a large, research-intensive western Canadian university provide unionized administrative and professional staff with the knowledge and skills needed to successfully integrate into the university environment and their new role? The data collection involved semi-structured interviews with nine unionized administrative and professional staff who had worked at the university for one year or less. Research findings highlight some alignment to relevant and contemporary topics as identified within the literature, understood as best practices to ensuring successful onboarding, including pre-onboarding and organizational socialization, while also emphasizing gaps within the process, specifically around interpersonal socialization and organizational culture.
Dynamic Network Delay Cartography
Creators: name: Rajawat, Ketan
name: Dall'Anese, Emiliano
name: Giannakis, Georgios B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Path delays in IP networks are important metrics, required by network operators for assessment, planning, and fault diagnosis. Monitoring delays of all source-destination pairs in a large network is however challenging and wasteful of resources. The present paper advocates a spatio-temporal Kalman filtering approach to construct network-wide delay maps using measurements on only a few paths. The proposed network cartography framework allows efficient tracking and prediction of delays by relying on both topological as well as historical data. Optimal paths for delay measurement are selected in an online fashion by leveraging the notion of submodularity. The resulting predictor is optimal in the class of linear predictors, and outperforms competing alternatives on real-world datasets.
description: Part of this paper has been published in the \emph{IEEE Statistical Signal Processing Workshop}, Ann Arbor, MI, Aug. 2012
Resummation in nonlinear equation for high energy factorizable gluon density and its extension to include coherence
Creators: name: Kutak, Krzysztof
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Motivated by forthcoming p-Pb experiments at Large Hadron Collider which require both knowledge of gluon densities accounting for saturation and for processes at a wide range of $p_t$ we study basic momentum space evolution equations of high energy QCD factorization. Solutions of those equations might be used to form a set of gluon densities to calculate observables in generalized high energy factorization. Moreover in order to provide a framework for predictions for exclusive final states in p-Pb scattering with high $p_t$ we rewrite the equation for the high energy factorizable gluon density in a resummed form, similarly to what has been done in \cite{Kutak:2011fu} for the BK equation. The resummed equation is then extended to account for colour coherence. This introduces an external scale to the evolution of the gluon density, and therefore makes it applicable in studies of final states.
description: 14 pages, appendix added, accepted for publication in JHEP
A study on the career advancement and retention of highly qualified women in the Canadian mining industry
Creators: name: Hughes, Courtnay Meaghan
Publisher: name: University of British Columbia
Year: 2012

description: The gender imbalance in the Canadian mining industry is considerable and persistent. Despite a substantial forecasted labour shortage, women represent only 14% of the national mining workforce. This research investigates the underutilization and under-representation of a specific labour subset, namely Highly Qualified Women. Highly Qualified Women (HQW) are women who have obtained a Bachelor’s degree or higher. HQW represent a substantial source of technical and leadership capacity for the mining industry. This research study used an online survey as the primary methodology for data collection, and the survey resulted in a sample of 163 HQW respondents. From the responses, HQW career paths were mapped and their perceptions on mining workplace culture and career barriers were analyzed. Results indicated two distinct career pathway trends for HQW in the mining industry. ‘The Specialist,’ a career characterized by multiple professional scientific and technical positions, and ‘The Corporate,’ a career characterized by professional administrative roles and roles in mid-level management. It was found that neither ‘Corporates’ nor ‘Specialists’ systematically progressed into senior management and executive roles. These findings suggest that HQWs careers in mining are stalled, despite a strong indication by respondents of interest in their professional career advancement. With regards to workplace culture, respondents indicated that blatant forms of gender discrimination have been reduced in mining workplaces; however, exclusion from informal networks, implicit bias and subtler forms of workplace discrimination persist. Consistent with previous mining sector research, improving work-life balance, work flexibility and mentorship were found as key drivers for HQW to advance and remain in the industry. From the significant insight of the respondents, strategic recommendations for organizations to improve the advancement and retention of HQW in mining were developed.
Rheology and microstructure of wormlike micelle-nanoparticle solutions
Creators: name: Han, Huiying
Publisher: name: Schulich School of Engineering
Year: 2023
Subjects: subject: wormlike micelles
subject: rheological properties
subject: thermal stability
subject: nanoparticles
subject: Engineering--Chemical

description: The rheological behavior and microstructure of wormlike micelles (WLMs) under thermal and chemical stresses are subjects of significant interest. This research advances both theoretical understanding and practical applications. First, the work explored the rheological behavior and microstructure of in-house prepared AgBr nanoparticles (NPs)/WLMs. The AgBr NPs were produced by reacting aqueous AgNO3 with cetyltrimethylammonium bromide (CTAB) in a micellar system containing CTAB and potassium hydrogen phthalate (PPA) hydrotrope. The TEM photographs captured a double-layer of CTAB surrounding the NPs and revealed the junctions between the NPs and the WLMs. The addition of CTAB-coated AgBr NPs increased the shear viscosity of WLMs at elevated temperatures. The NPs reduced the flow activation energy by 20% suggesting increased thermal resistance. The relaxation time of NP-mediated WLMs was improved at 35 oC. The enhanced thermal stability was repeatable after multiple thermal cycles between 25 oC and 35 oC, confirming the reversibility of the microstructures. The junction between the WLMs and the AgBr NPs strengthened the micellar structure, contributing to the improved shear viscosity and viscoelasticity of the WLMs. Next, our work explored the effect of alcohol on the rheological behavior of SiO2 NP/CTAB/PPA WLMs. No previous literature investigated the effect of chemical stresses on NP-mediated WLMs. The zero-shear viscosity of 30 mM CTAB/20 mM PPA WLMs was improved by 30% with the addition of 0.05 wt% SiO2 NPs. We then assessed the effect of ethanol and 1-hexanol on 0.05 wt% SiO2 NP/30 mM CTAB/20 mM PPA WLMs. Remarkably, the zero-shear viscosity increased by around 60%, 100%, and 25% at ethanol concentrations of 0.14 wt%, 0.60 wt% and 1.40 wt%, respectively. SiO2 NPs served as junction points, promoting crosslinking among shorter micelles and improving micellar entanglement. However, SiO2 NPs did not have a discernible effect on 1-hexanol/WLM systems due to the strong interaction between WLMs and 1-hexanol at the micellar interface. Overall, these findings introduced a novel dimension in which the incorporation of NPs into the WLMs substantially increased shear viscosity under thermal and chemical stresses, holding promise for high-temperature and alcohol-involved applications.
Misfit Narratives: Exploring the Lived Experiences of Mad Social Workers
Creators: name: Warner, Erin Christina
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Social work education
subject: Social work
subject: Clinical social work
subject: Critical disability studies
subject: Mad studies
subject: Narrative inquiry
subject: Lived experiences
subject: Critical social work
subject: Advocacy
subject: Critical mental health
subject: Psychology
subject: FOS: Psychology
subject: Education--Social Sciences
subject: Education--Higher
subject: Social Work
subject: FOS: Sociology
subject: Women's Studies
subject: Gender Studies
subject: Sociology--Theory and Methods
subject: Psychology--Clinical

description: This thesis chronicles the stories of six Mad social workers in Canada, including my own story as a Mad social worker. I unsettle dominant methods for approaching lived experience research through establishing a research methodology which creates a harmony between feminist narrative inquiry and autoethnography as they are guided by teachings of Indigenous wholism and critical resistance. Grounded in a theoretical framework of critical disability studies, Mad studies, and critical feminism, I conducted five feminist narrative life history interviews – or conversations – with storytellers and critically explored my own life history through art and poetic reflection. As the story of this research unfolds, storytellers share about the masks they wear in response to sanism in both education and in the field of practice, as well as the pressure to be a “blank slate” to conform to the expectations of professional social work. Yet, in the midst of these experiences, storytellers demonstrate that it is within their Mad identities which initially brought them to the field that they find their strengths and ability to “get it” as mental health professionals. This research calls on the social work profession to build robust support systems to better respond to the psychological and emotional labour of our roles as social workers; to dismantle dominant ideas shaped by the interlocking systems of oppression which determine who gets to be a social worker; and to reimagine a social work praxis that is better aligned with our professional values of social justice and self-determination.
Holorusia herculeana
Creators: name: Men, Qiulei
name: Lu, Zhiyong
name: Sheng, Pingping
name: Gui, Xiang
name: Wang, Zhizhong
name: Mu, Dan
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tipulidae
Holorusia
Holorusia herculeana

description: Holorusia herculeana (Alexander, 1941) Ctenacroscelis herculeana Alexander, 1941: 383. Synonymised by Vane-Wright, 1967: 536. Material examined. 1♂, Anhui, Yaoluoping National Nature Reserve, Yaoluoping Village (30°59'N, 116°04'E), 22 August 2016, coll. Qiulei Men. Distribution. China (Anhui, Sichuan, Fujian, Guizhou, Hunan).
description: Published as part of Men, Qiulei, Lu, Zhiyong, Sheng, Pingping, Gui, Xiang, Wang, Zhizhong & Mu, Dan, 2017, Taxonomy on crane flies in family Tipulidae and Limoniidae (Diptera: Tipuloidea) from Yaoluoping National Nature Reserve, Anhui, China, pp. 476-489 in Zoological Systematics 42 (4) on page 479, DOI: 10.11865/zs.201720, http://zenodo.org/record/5366761
description: {"references": ["Alexander, C. P. 1941. New or little-known Tipulidae from eastern Asia (Diptera). XLIII. Philippine Journal of Science, 73: 375 - 420."]}
Lasso-type sparse regression and high-dimensional Gaussian graphical models
Creators: name: Chen, Xiaohui
Publisher: name: University of British Columbia
Year: 2012

description: High-dimensional datasets, where the number of measured variables is larger than the sample size, are not uncommon in modern real-world applications such as functional Magnetic Resonance Imaging (fMRI) data. Conventional statistical signal processing tools and mathematical models could fail at handling those datasets. Therefore, developing statistically valid models and computationally efficient algorithms for high-dimensional situations are of great importance in tackling practical and scientific problems. This thesis mainly focuses on the following two issues: (1) recovery of sparse regression coefficients in linear systems; (2) estimation of high-dimensional covariance matrix and its inverse matrix, both subject to additional random noise. In the first part, we focus on the Lasso-type sparse linear regression. We propose two improved versions of the Lasso estimator when the signal-to-noise ratio is low: (i) to leverage adaptive robust loss functions; (ii) to adopt a fully Bayesian modeling framework. In solution (i), we propose a robust Lasso with convex combined loss function and study its asymptotic behaviors. We further extend the asymptotic analysis to the Huberized Lasso, which is shown to be consistent even if the noise distribution is Cauchy. In solution (ii), we propose a fully Bayesian Lasso by unifying discrete prior on model size and continuous prior on regression coefficients in a single modeling framework. Since the proposed Bayesian Lasso has variable model sizes, we propose a reversible-jump MCMC algorithm to obtain its numeric estimates. In the second part, we focus on the estimation of large covariance and precision matrices. In high-dimensional situations, the sample covariance is an inconsistent estimator. To address this concern, regularized estimation is needed. For the covariance matrix estimation, we propose a shrinkage-to-tapering estimator and show that it has attractive theoretic properties for estimating general and large covariance matrices. For the precision matrix estimation, we propose a computationally efficient algorithm that is based on the thresholding operator and Neumann series expansion. We prove that, the proposed estimator is consistent in several senses under the spectral norm. Moreover, we show that the proposed estimator is minimax in a class of precision matrices that are approximately inversely closed.
Analysis of discrepancies in Dalitz plot parameters in eta to 3 pion decay
Creators: name: Kolesar, Marian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We analyze the Dalitz plot parameters of eta to 3 pion decay in the framework of resummed chiral perturbation theory. This approach allows us to keep the uncertainties in the NNLO and higher orders under better control and estimate their influence. We cannot confirm the suspected discrepancy in the case of the charged decay parameter b, where even small uncertainties in higher orders could accommodate the difference. On the other hand, we find the experimental value of the neutral decay parameter alpha incompatible with an assumption of good convergence properties in the center of the Dalitz plot. We calculate pion-pion rescattering bubble corrections up to three loops and show that these might explain the discrepancy, especially for a low value of the pseudoscalar decay constant in the chiral limit. However, that could indicate a failure of convergence of the chiral series in this channel already at low energies around 500MeV.
description: Presented at "Hadron Structure 2011", Tatranska Strba, Slovakia, June 2011. 4 pages, 1 figure
Field-induced negative differential spin lifetime in silicon
Creators: name: Li, Jing
name: Qing, Lan
name: Dery, Hanan
name: Appelbaum, Ian
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We show that the electric field-induced thermal asymmetry between the electron and lattice systems in pure silicon substantially impacts the identity of the dominant spin relaxation mechanism. Comparison of empirical results from long-distance spin transport devices with detailed Monte-Carlo simulations confirms a strong spin depolarization beyond what is expected from the standard Elliott-Yafet theory already at low temperatures. The enhanced spin-flip mechanism is attributed to phonon emission processes during which electrons are scattered between conduction band valleys that reside on different crystal axes. This leads to anomalous behavior, where (beyond a critical field) reduction of the transit time between spin-injector and spin-detector is accompanied by a counterintuitive reduction in spin polarization and an apparent negative spin lifetime.
Search for strong gravity signatures in same-sign dimuon final states using the ATLAS detector at the LHC
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for microscopic black holes has been performed in a same-sign dimuon final state using 1.3 fb^-1 of proton-proton collision data collected with the ATLAS detector at a centre of mass energy of 7 TeV at the CERN Large Hadron Collider. The data are found to be consistent with the expectation from the Standard Model and the results are used to derive exclusion contours in the context of a low scale gravity model.
description: 15 pages plus author list (38 pages total), 3 figures, 3 tables, matches published version in Physics Letters B
Additional file 8 of Glycemic control and neonatal outcomes in women with gestational diabetes mellitus treated using glyburide, metformin, or insulin: a pairwise and network meta-analysis
Creators: name: Yu, Dan-Qing
name: Xu, Guan-Xin
name: Teng, Xin-Yuan
name: Xu, Jing-Wei
name: Tang, Liang-Fang
name: Feng, Chun
name: Rao, Jin-Peng
name: Jin, Min
name: Wang, Li-Quan
Publisher: name: figshare
Year: 2021
Subjects: Biochemistry
Medicine
Biotechnology
Chemical Sciences not elsewhere classified

description: Additional file 8: Supplementary Table 7. Pairwise meta-analysis of 2HBG after removal studies with imbalanced baseline blood glucose.
Reliably quantifying asynchronisation between local representations of UTC
Creators: name: Bayat, Ashkan
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Education--Sciences

description: Asynchronisation is a major limiting factor for Coordinated Universal time (UTC) performance, and, by extension, other clock-network concepts, and our aim is to quantify asynchronisation reliably between different local representations of UTC, known as UTC(k) for k the site label. To this end, we devise a simple but faithful physical model and mathematical description for quantifying asynchronisation reliably between different UTC(k). Our UTC mathematical model comprises coupled Ornstein-Uhlenbeck (OU) processes, each representing UTC(k), which we discuss physically as a network of ballistic clocks network managed by a controller; for clarity we illustrate this network in the context of the sport of curling with the ballistic clocks pictured as curling stones. From our closed-form solution, we establish how to quantify asynchronisation reliably. Furthermore, we extend our ballistic-clock model to accommodate quantum effects, namely squeezing and entanglement, and analyse potential quantum advantage. Our approach to reliably quantifying asynchronisation is an important step forward conceptually for UTC to serve as a common time reference for Global Navigation Satellite System (GNSS) interoperability.
Co-Injection of Non-Condensable Gas and Foam in SAGD using a Modified Well Configuration
Creators: name: Zhang, Yushuo
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Surfactant
subject: Non-Condensable Gas
subject: Thermal Recovery Process
subject: Foam
subject: Modified Well Configurations
subject: SAGD
subject: Engineering--Petroleum
subject: Engineering--Chemical

description: The purpose of this project is to evaluate the performance of a non-condensable gas (NCG) foam as an additive to the steam assisted gravity drainage (SAGD) process using the conventional as well as modified well configurations. Both laboratory experiments and numerical simulations were used in the study. For safety reasons, nitrogen gas was used in the laboratory experiments to form the foam. However, in numerical simulations, methane is used as the gas component of the foam. The purpose of foam in this process is to reduce the heat loss and to decrease the residual oil saturation. Modified well configurations are designed to enhance steam efficiencies in the target zones. SAGD experiments were conducted in linear sand-packs to evaluate the effects of NCG and Foamed NCG as steam additives on the oil recovery performance. The value of residual oil saturations under NCG or foamed NCG conditions were determined through history matching of these experiments with numerical simulation. Several different foaming agents were evaluated for their effectiveness in reducing the residual oil saturation and achieving high recovery factor. The best performing foaming agent NC160 was then evaluated in a linear physical model for its foam flow characteristics. The results of these tests were also history-matched with a thermal reservoir simulator to determine the foam flow characteristics that can be applied to field scale simulations. A numerical simulation study of Long Lake Pad 16 found that steam only SAGD operation in 10 years had a cumulative Steam Oil Ratio (cSOR) of 6.23 and the total oil production of 79,193 m3. However, the best performing case of foam assisted SAGD, using three horizontal wells configuration, reduced the cSOR to 3.94 and increased the total oil production to 85,068 m3. As expected, a foam insulation layer formed above steam chamber, which resulted in superior performance regarding steam efficiency. This field scale simulation study was based on the foam flow parameters determined through history matching of the lab-scale physical model tests.
Study of CP violation in Dalitz-plot analyses of B0 --> K+K-KS, B+ --> K+K-K+, and B+ --> KSKSK+
Creators: name: The BABAR Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We perform amplitude analyses of the decays $B^0 \to K^+K^-K^0_S$, $B^+ \rightarrow K^+K^-K^+$, and $B^+ \to K^0_S K^0_S K^+$, and measure CP-violating parameters and partial branching fractions. The results are based on a data sample of approximately $470\times 10^6$ $B\bar{B}$ decays, collected with the BABAR detector at the PEP-II asymmetric-energy $B$ factory at the SLAC National Accelerator Laboratory. For $B^+ \to K^+K^-K^+$, we find a direct CP asymmetry in $B^+ \to ϕ(1020)K^+$ of $A_{CP}= (12.8\pm 4.4 \pm 1.3)%$, which differs from zero by $2.8 σ$. For $B^0 \to K^+K^-K^0_S$, we measure the CP-violating phase $β_{\rm eff} (ϕ(1020)K^0_S) = (21\pm 6 \pm 2)^\circ$. For $B^+ \to K^0_S K^0_S K^+$, we measure an overall direct CP asymmetry of $A_{CP} = (4 ^{+4}_{-5} \pm 2)%$. We also perform an angular-moment analysis of the three channels, and determine that the $f_X(1500)$ state can be described well by the sum of the resonances $f_0(1500)$, $f_2^{\prime}(1525)$, and $f_0(1710)$.
description: 35 pages, 68 postscript figures. v3 - minor modifications to agree with published version
Chinese International Graduate Students’ Experience of Engagement in Online Learning in Canadian Higher Education: An Ecological Perspective
Creators: name: Yue, Cai
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: online learning
subject: student engagement
subject: Education

description: While the last decade has seen a dramatic increase in both the acceptance and use of online learning in post-secondary education (Seaman & Seaman, 2016), studies have documented both higher and lower student engagement in online learning (Muthuprasad et al., 2021). Most previous studies on online learning focused on a solitary dimension of student engagement in their analytical models (Pianta et al., 2012), rather than embracing a more comprehensive sociocultural framework. Using a narrative inquiry methodology, I examined the online learning experience of six mainland Chinese international graduate students who had at least one-semester experience of online learning in Canadian universities. Specifically, this study explored: (a) the students’ online engagement experiences; (b) factors that influenced their online learning; and (c) the role of cultural factors that influenced their online engagement. The data for the study were drawn from semi-structured one-on-one interviews and the analysis of written narratives provided by the participants. Bronfenbrenner’s ecological model served as the theoretical framework for this study, facilitating the examination of various dimensions of students’ engagement in online learning. The findings indicated that participants generally held positive perceptions of their online learning experiences, while also recognizing the inherent advantages and challenges associated with this mode of education. The study revealed that student engagement was molded by a complex interplay of factors, such as personal interests, motivation, course attributes, instructor effectiveness, technological tools, visual aids, language considerations, peer interactions, familial and social connections, and the broader learning environment. The opinions of the participants varied on commonly held beliefs about Chinese culture influencing them, with some acknowledging these preconceived notions and corresponding behaviours aligned with them, while others challenged these stereotypes and emphasized individual differences and cultural contexts. The students’ accounts also highlighted aspects of Canadian culture with regard to equality, freedom of expression, independence in education, and diverse teaching styles among professors. Applying Bronfenbrenner’s ecological system theory revealed the interconnectedness of factors at different levels. With an understanding of these dynamics, I discussed implications of the findings in conceptualizing culturally responsive teaching practices, enhanced engagement and success among Chinese international students in online learning.
Finite Element-based Methods for Dent Assessment on Pipelines
Creators: name: Zhao, Jian
Publisher: name: Schulich School of Engineering
Year: 2023
Subjects: subject: Engineering
subject: Engineering--Mechanical
subject: Materials Science

description: As a well-developed form for energy transportation over wide ranges and long distances, pipelines always encounter various threats in service. In recent years, with the strong demand of clean energy, hydrogen transport in existing pipelines induces new challenges to the pipelines. Dent is a common mechanical defect present on pipelines, compromising structural integrity and causing pipeline failures. To date, there have been limited methods available to assess dent, and a dent combined with other types of defects such as corrosion. In this work, novel methods and criteria were developed for assessment of pipeline dent, corrosion in dent and hydrogen distribution at the dent using finite element (FE) modeling. Denting and spring-back processes were modeled and plain dents were created on the pipeline. A new criterion based on ductile damage failure indicator analysis was proposed. Pressure-bearing capacity was assessed on corroded pipelines containing a dent, where the mutual interaction between corrosion and the dent were determined. In addition, a method was developed to assess the corrosion in dent by considering both mechanical and electrochemical forces. For dented pipelines repurposed for transporting hydrogen gas, a FE-based model was developed to determine the stress/strain and H atom concentrations at the dent, where denting, spring-back and cyclic loading processes were modeled. Furthermore, the hydrogen-induced crack initiation on the pipeline subject to denting process was investigated using the phase field method.
Spectral Efficiency Analysis for User-centric Cell-free Massive MIMO System During Uplink Transmission
Creators: name: Sarker, Manobendu
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Cell-free massive MIMO
subject: Spectral Effeciency
subject: User-centric Approach
subject: Association Assignment
subject: Pilot Assignment
subject: Power Allocation
subject: RSMA
subject: Engineering--Electronics and Electrical

description: The cell-free (CF) massive multiple-input multiple-output (mMIMO) system is recognized as a promising paradigm for future wireless networks, including sixth-generation (6G) and beyond, for providing ultrareliable and low-latency support to the high-throughput applications. The user-centric (UC) approach enhances its interference management by serving each equipments (UE) through a specific set of access points (APs), instead of all the APs. This thesis focuses on developing several computationally efficient schemes for improving the spectral efficiency (SE) performance of the UC CF mMIMO system during the uplink (UL) phase. First, a new AP-UE association scheme is proposed which leverages both the AP and UE-preferences for association assignment. It is shown that the proposed association scheme provides superior SE performance compared to the state of the art AP-preference based association scheme. Second, a pilot assignment scheme based on the auction algorithm is proposed to maximize SE and minimize interference. Numerical results demonstrate that the proposed pilot assignment scheme provides up to 30% higher average SE and up to 50% lower interference than several recent pilot assignment schemes. Third, a pilot power allocation scheme is proposed that reduces both channel estimation error and per-user pilot transmission power. Numerical results verify the effectiveness of the proposed scheme in improving the 95%-likely spectral efficiency performance by up to 16% and reducing the average pilot transmission power by up to 78% compared to existing schemes. Fourth, two centralized power allocation schemes for data transmission are proposed based on fractional programming method. Numerical results demonstrate that, compared to the no power control scheme, the proposed schemes improve the average SE performance by up to 47% while reducing the average transmission power by up to 95%. Finally, the integration of rate splitting multiple access (RSMA) technique is proposed to further enhance the SE performance for the UC CF MIMO system. Simulation results underscore the significant SE performance enhancement up to 61% when the RSMA technique is integrated. The results in this thesis prove that the proposed schemes can be viable choices for improving the SE performance of a UC CF mMIMO system during the UL phase.
A comparative study of the fixed pivot technique and finite volume schemes for multi-dimensional breakage population balances
Creators: name: Lin Leong, Suet
name: Singh, Mehakpreet
name: Ahamed, Firnaaz
name: Heinrich, Stefan
name: Ing Xun Tiong, Simon
name: Chew, Irene Mei Leng
name: HO, Yong Kuen
Publisher: name: University of Limerick
Year: 2023
Subjects: classificationCode: 40
subject: Engineering
classificationCode: 49
subject: Mathematical sciences

description: When modeling particle breakage, the use of a single dimension to characterize particulate systems becomes intractable when multiple dimensions (e.g., size and shape) are important. Amongst many potential numerical techniques, the Fixed Pivot Technique (FPT) and Finite Volume Schemes (FVS) are popular choices to resolve multi-dimensional breakage population balance equations (PBEs). However, whether there exists a general multi-purpose technique between the two remains unclear. Across all test cases with identical size domain and mesh, while both techniques demonstrate comparable accuracy in resolving the moments and number densities (with maximum difference in average relative errors of ~O (100 ) and ~O(102 ), respectively), and exhibit similar computational efficiency (time taken by FPT relative to FVS is of ~O(100 )), the choice of numerical technique is contingent upon the properties where accurate prediction is critical. To this end, FVS is the preferred choice when precise estimation of up to two properties is required owing to its simplicity, albeit requiring distinct schemes for different properties. Conversely, when more than two properties are crucial, the FPT is more suited as it preserves up to four properties in the internal 2D space. Overall, this work offers rational guidance for efficient and accurate modeling of multi-dimensional breakages
Tipula (Yamatotipula) nova Walker 1848
Creators: name: Men, Qiulei
name: Lu, Zhiyong
name: Sheng, Pingping
name: Gui, Xiang
name: Wang, Zhizhong
name: Mu, Dan
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tipulidae
Tipula
Tipula nova

description: Tipula (Yamatotipula) nova Walker, 1848 Tipula (Yamatotipula) nova Walker, 1848: 71; Savchenko, 1961: 227; Yang & Yang, 1997: 1437; Men et al., 2015: 328–338. Tipula fumifasciata Brunetti, 1911: 250. Synonymised by Alexander, 1920: 269. Yamatotipula nohirae Matsumura, 1916: 460. Synonymised by Alexander, 1920: 269. Material examined. 3♂ 2♀, Anhui, Yaoluoping National Nature Reserve, Yaoluoping Village (30°59'N, 116°04'E), 24 August 2016, coll. Qiulei Men. Distribution. China (Shanxi, Henan, Anhui, Hubei, Jiangxi, Zhejiang, Fujian, Sichuan, Yunnan, Guizhou, Guangdong, Taiwan, Hong Kong), India, Japan, Korea.
description: Published as part of Men, Qiulei, Lu, Zhiyong, Sheng, Pingping, Gui, Xiang, Wang, Zhizhong & Mu, Dan, 2017, Taxonomy on crane flies in family Tipulidae and Limoniidae (Diptera: Tipuloidea) from Yaoluoping National Nature Reserve, Anhui, China, pp. 476-489 in Zoological Systematics 42 (4) on pages 485-486, DOI: 10.11865/zs.201720, http://zenodo.org/record/5366761
description: {"references": ["Walker, F. 1848. List of the specimens of dipterous insects in the collection of the British museum. Pt. 1. British Museum, London. 220 pp.", "Savchenko, E. N. 1961. Crane-flies (Diptera, Tipulidae), Subfam. Tipulinae, Genus Tipula L., (part 1). Fauna USSR, N. S. 79, Nasekomye Dvukrylye [Diptera], Leningrad \" Nauka \", 2 (3). 487 pp.", "Yang, D., Yang, C. K. 1997. Diptera: Tipulidae. In: Yang, X. K. (ed.), Insects of the Three Gorge Reservoir Area of Yangtze River. Chongqing Publishing House, Chongqing, China. pp. 1437 - 1440.", "Brunetti, B. 1911. Revision of the Oriental Tipulidae with descriptions of new species. Records of the Indian Museum, 6: 231 - 314.", "Alexander, C. P. 1920. New or little-known crane-flies from Formosa (Tipulidae, Diptera). Annals of the Entomological Society of America, 13: 249 - 270.", "Matsumura, S. 1916. Thousand insects of Japan, Add. 2. Keiseisha, Tokyo. 289 pp."]}
Extension of a radiative neutrino mass model based on a cosmological view point
Creators: name: Suematsu, Daijiro
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider an extension of the radiative neutrino mass model at TeV regions so as to give the origin for inflation of the universe. This extension also gives a consistent explanation for both the origin of baryon number asymmetry and dark matter. A small scalar coupling which plays a crucial role in the neutrino mass generation in the original model may be related to parameters which are control inflation.
description: 14 pages, 2 figures, some remarks and references added, accepted version for publication
The XENON100 exclusion limit without considering Leff as a nuisance parameter
Creators: name: Davis, Jonathan H
name: Boehm, Celine
name: Oppermann, Niels
name: Ensslin, Torsten
name: Lacroix, Thomas
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In 2011, the XENON100 experiment has set unprecedented constraints on dark matter-nucleon interactions, excluding dark matter candidates with masses down to 6 GeV if the corresponding cross section is larger than 10^{-39} cm^2. The dependence of the exclusion limit in terms of the scintillation efficiency (Leff) has been debated at length. To overcome possible criticisms XENON100 performed an analysis in which Leff was considered as a nuisance parameter and its uncertainties were profiled out by using a Gaussian likelihood in which the mean value corresponds to the best fit Leff value smoothly extrapolated to zero below 3 keVnr. Although such a method seems fairly robust, it does not account for more extreme types of extrapolation nor does it enable to anticipate on how much the exclusion limit would vary if new data were to support a flat behaviour for Leff below 3 keVnr, for example. Yet, such a question is crucial for light dark matter models which are close to the published XENON100 limit. To answer this issue, we use a maximum Likelihood ratio analysis, as done by the XENON100 collaboration, but do not consider Leff as a nuisance parameter. Instead, Leff is obtained directly from the fits to the data. This enables us to define frequentist confidence intervals by marginalising over Leff.
description: 10 pages;, 9 figures; references added
Cold Fronts and Gas Sloshing in Galaxy Clusters with Anisotropic Thermal Conduction
Creators: name: ZuHone, J. A.
name: Markevitch, M.
name: Ruszkowski, M.
name: Lee, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: (Abridged) Cold fronts in cluster cool cores should be erased on short timescales by thermal conduction, unless protected by magnetic fields that are "draped" parallel to the front surfaces, suppressing conduction perpendicular to the fronts. We present MHD simulations of cold front formation in the core of a galaxy cluster with anisotropic thermal conduction, exploring a parameter space of conduction strengths parallel and perpendicular to the field lines. Including conduction has a strong effect on the temperature of the core and the cold fronts. Though magnetic field lines are draping parallel to the front surfaces, the temperature jumps across the fronts are nevertheless reduced. The field geometry is such that the cold gas below the front surfaces can be connected to hotter regions outside via field lines along directions perpendicular to the plane of the sloshing motions and along sections of the front which are not perfectly draped. This results in the heating of this gas below the front on a timescale of a Gyr, but the sharpness of the density and temperature jumps may still be preserved. By modifying the density distribution below the front, conduction may indirectly aid in suppressing Kelvin-Helmholtz instabilities. If conduction along the field lines is unsuppressed, we find that the characteristic sharp jumps in X-ray emission seen in observations of clusters do not form. This suggests that the presence of sharp cold fronts in hot clusters could be used to place upper limits on conduction in the {\it bulk} of the ICM. Finally, the combination of sloshing and anisotropic thermal conduction can result in a larger flux of heat to the core than either process in isolation. While still not sufficient to prevent a cooling catastrophe in the very central ($r \sim$ 5 kpc) regions of the cool core, it reduces significantly the mass of cool gas that accumulates outside those radii.
description: 19 pages, 14 figures, "emulateapj" format. Updated version to match referee's comments and suggestions. Accepted by the Astrophysical Journal
title: Fourth European Workshop on Standardised Procedure for the Inspection of Sprayers in Europe - SPISE 4 -, Lana (South Tyrol), March 27-29, 2012
Creators: name: Ganzelmeier, Heinz
name: Wehmann, Hans-Joachim
Publisher: name: Julius Kühn-Institut
Year: 2013

description: Julius-Kühn-Archiv; 439; 3-244
Evaluation of Volunteering Capabilities in an Open-Source Software Community
Creators: name: Hariharan, Aadharsh
Publisher: name: Graduate Studies
Year: 2023
Subjects: subject: Open-Source Software
subject: Episodic Volunteering
subject: Habitual Volunteering
subject: Perl and Raku
subject: PLSPM
subject: Quantitative and Qualitative Data Analysis
subject: Information Science

description: Open-source software is a cornerstone of modern technology. Embodying principles of transparency, collaboration, and innovation, it nurtures a vibrant ecosystem that empowers individuals, businesses, and communities. Open-source software has impacted software development significantly; the longevity of open-source projects is essential to the entire field of software development. Challenges faced by open-source software communities include the management of contributors, effective utilization of them, retention of existing contributors, and recruitment of new contributors. For projects where most contributors are volunteers – which remains the case for several projects such as Gnome, Perl, and Python – attracting and retaining volunteers becomes crucial to success. Crowston (2011) argued that because of the high mobility of knowledge workers, even paid employees require personal motivation to participate in projects. In this sense, they should also be viewed as volunteers. Numerous studies explore the dynamics of open-source communities and volunteer contributions. This research has yielded models to assess the volunteering prowess of open-source software communities, and proposed solutions to address challenges. However, most studies have taken a collective approach, encompassing multiple open-source software communities, which presents a generalized perspective. Utilizing a fusion of quantitative and qualitative techniques, this research project gauges the degree of relevance and applicability of existing theories, models, and solutions within the unique context of the Perl and Raku community. This case study offers valuable insights into the community's existing skills, capabilities, and resources available for constructive contributions to growth and development. These insights are instrumental in identifying and implementing strategies to attract and retain volunteers within the community. Conflict within communities can be a significant factor in retaining volunteers, and the latter portion of the thesis emphasizes identifying techniques to address these challenges.
FrAG: Framework for the Analysis of Games
Creators: name: Ganesh, Sankarasubramanian
Publisher: name: Science
Year: 2023
Subjects: subject: Reverse Engineering
subject: Retrogames
subject: Automated Dynamic Analysis
subject: Reinforcement Learning
subject: Game Analysis
subject: Computer Science

description: Historical games or retrogames ran on constrained systems that required programmers to use various techniques and optimizations. To learn about these techniques, we often study their source code. However, when the only remaining information about the games is their binary image, conventional analysis methods are time-consuming and do not scale. One way to study these techniques is to reverse engineer the binary images. However, conventional approaches to reverse engineer the images often do not provide accurate results as programmers often blurred the lines between code and data, because unlike most modern platforms, these platforms do not distinguish between code and data. We present FrAG, a Framework for the Analysis of Games that dynamically analyzes games at scale with no human interaction using artificial intelligence. FrAG’s design allows it to be ported to other platforms. To demonstrate FrAG’s capability and to evaluate its efficacy, we use a test suite of eight Atari 2600 games with ground truth available. We also present a novel way of disassembling game ROMs using data collected from the framework. Furthermore, FrAG can also be used as a platform for training artificial intelligence agents for several platforms.
Self-calibrating the gravitational shear-intrinsic ellipticity-intrinsic ellipticity (GII) cross-correlation
Creators: name: Troxel, M. A.
name: Ishak, Mustapha
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We extend the 3-point intrinsic alignment self-calibration technique to the gravitational shear-intrinsic ellipticity-intrinsic ellipticity (GII) bispectrum. The proposed technique will allow the measurement and removal of the GII intrinsic alignment contamination from the cross-correlation weak lensing signal. While significantly decreased from using cross-correlations instead of auto-correlation in a single photo-z bin, the GII contamination persists in adjacent photo-z bins and must be accounted for and removed from the lensing signal. We relate the GII and galaxy density-intrinsic ellipticity-intrinsic ellipticity (gII) bispectra through use of the galaxy bias, and develop the estimator necessary to isolate the gII bispectrum from observations. We find that the GII self-calibration technique performs at a level comparable to that of the gravitational shear-gravitational shear-intrinsic ellipticity correlation (GGI) self-calibration technique, with measurement error introduced through the gII estimator generally negligible when compared to minimum survey error. The accuracy of the relationship between the GII and gII bispectra typically allows the GII self-calibration to reduce the GII contamination by a factor of 10 or more for all adjacent photo-z bin combinations at $\ell>300$. For larger scales, we find that the GII contamination can be reduced by a factor of 3-5 or more. The GII self-calibration technique is complementary to the existing GGI self-calibration technique, which together will allow the total intrinsic alignment cross-correlation signal in 3-point weak lensing to be measured and removed.
description: 18 pages, 4 figures. Several sections have been reworded, results and conclusions are all the same. arXiv admin note: substantial text overlap with arXiv:1109.4896
Supplementary Results from Millennial processes of population decline, range contraction and near extinction of the European bison
Creators: name: Pilowsky, July A.
name: Brown, Stuart C.
name: Llamas, Bastien
name: van Loenen, Ayla L.
name: Kowalczyk, Rafał
name: Hofman-Kamińska, Emilia
name: Manaseryan, Ninna H.
name: Rusu, Viorelia
name: Križnar, Matija
name: Rahbek, Carsten
name: Fordham, Damien A.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310399
subject: Ecology not elsewhere classified
classificationCode: 370506
subject: Palaeontology (incl. palynology)

description: Additional tables and figures showing additional details of the simulation results.