nils-herrmann/clean_scirepeval huggingface dataset:
Engineering economy: The crossroads of business, engineering, and entrepreneurship

Creative minds often times have innovative ideas for designing products and services that may lead to successful businesses but these potential entrepreneurs often need an outside perspective from practitioners trained in business and engineering that can analyze potential ideas, perform engineering economic analyses, and help construct business plans to help entrepreneurs proceed in a fiscally responsible and systematic manner. Engineering economy is at the center of each and every business decision made in today's fast paced business world. Whether it be a rate of return analysis, payback analysis, net present worth analysis or a host of other engineering economic analyses, the ultimate decision to fund an engineering project, merger, acquisition, or to provide venture capital to an entrepreneur comes down to using the basic principles learned in engineering economy. This paper discusses the evolution of an engineering economy curriculum and the birth and success of a business and engineering student group that grew out of the engineering economy course that has grown from six to over 70 active members in just two years. All students in the student group completed the engineering economy course as sophomore or junior engineering students and have gone on to serve as financial advisers for the current engineering economy students, sponsor company case competitions, and most recently serve as consultants in the local community to help startup businesses. The paper discusses the evolution of the student group from the engineering economy course and the work of the entrepreneurship consulting group that is receiving much attention from program advisory board members, startup businesses, and university leadership.
Rebels against the System: Leadership Agency and Curriculum Innovation in the Context of School Autonomy and Accountability in England.

The purpose of this paper is to describe and analyse the development of school autonomy, school leadership and curriculum innovation in England over the past 40 years. It provides a baseline picture for the wider international study on school autonomy and curriculum innovation.  An initial literature review was undertaken, including policy document analysis. Interviews and observations were undertaken with participants on a pilot professional programme for school leaders seeking to develop their school curriculum.  While all schools in England have needed to adapt their curricula to reflect the new National Curriculum introduced from 2014, relatively few schools appear to have used this opportunity to design genuinely innovative curricula that respond to the changing needs of learners in the twenty first century. This includes the academies and free schools currently around one in four schools which are not legally required to follow the National Curriculum. The authors posit that leadership agency by principals and their professional teams is more important than policy/legal freedoms for securing curriculum innovation. Such agency appears to depend on the capacity and confidence of leaders to shape an alternative and innovative curriculum in the face of structural constraints, in particular England's sharp accountability system, effectively making these leaders "rebels against the system"  The empirical findings are preliminary and based on a small convenience sample.  Given England's position as a relatively extreme example of high autonomy high accountability quasi market school reforms this paper provides valuable insights on school autonomy and curriculum innovation that can inform policy and practice more widely.
Using developmental evaluation as a design thinking tool for curriculum innovation in professional higher education

This paper argues for the use of 'developmental' evaluation as a design based research tool for sustainable curriculum innovation in professional higher education. Professional education is multi faceted and complex with diverse views from researchers, professional practitioners, employers and the world of politics leaving little consensus about the nature of educational 'problems' let alone educational 'solutions' Developmental evaluation is an emerging approach to evaluating innovations and/or organisations that are in a continuous state of change; it asks the evaluators to not simply appraise a final design, but to work with designers through processes of rapid reconnaissance, mapping the territory and emergent modelling. This paper provides an account of how the adoption of the dispositions and approaches of developmental evaluation increased the trustworthiness of decision making in the design of a new post graduate teacher education degree in Australia. The principles of developmental evaluation as a design thinking approach have application in other complex curriculum settings.
Effect of tamarind (Tamarindus indica L. seed on antioxidant activity, phytocompounds, physicochemical characteristics, and sensory acceptability of enriched cookies and mango juice
Venue: Food science nutrition

Tamarind seeds are not consumed despite their high antioxidative activity. In this study, 0 10% tamarind seed powder (TSP) was incorporated into mango juice and cookies. Total phenolics (Folin Ciocalteu assay) antioxidant activity (2,2 diphenyl 1 picrylhydrazyl (DPPH) radical scavenging assay) flavonoid (aluminum chloride assay) condensed tannins content (Vanillin HCl assay) and consumer acceptability (n 50) of the products were determined. TSP increased the pH and viscosity and reduced titratable acidity of juice. Incorporation of TSP increased the: total phenolic content (6.84 0.21 to 88.44 0.8 mg GAE/100 mL) flavonoid (4.64 0.03 21.7 0.36 mg CE/100 mL) condensed tannins (0.24 0.01 21.81 0.08 mg CE/100 mL) and total antioxidant activity (4.65 0.88 21.70 0.03 mg VCE/100 mL) of juice. A similar trend was observed for cookies. Maximum sensorially acceptable TSP levels were 1.5% and 6% respectively, for juice and cookies. TSP can thus be utilized as a source of natural antioxidants in food products.
Cyberpharmacovigilance les reseaux sociaux sont ils utiles en pharmacovigilance

Resume Cette derniere decennie a ete marquee par le developpement des reseaux sociaux devenus tres populaires a l'ere du Web, permettant aux utilisateurs de communiquer, interagir et partager dans le monde entier. Le domaine de sante occupe une place importante dans ce mode de communication. Les reseaux sociaux constituent donc une source d'informations potentiellement exploitables. Dans le domaine des effets indesirables (EI) ils pourraient etre une source complementaire pour identification d'EI ou generation de signal. Nous presentons trois exemples d'utilisation des forums patients en pharmacovigilance (1) analyser la perception du risque des patients avant et apres le retrait du benfluorex, puis apres sa mediatisation (2) comparer les EI notifies des antineoplasiques oraux par les patients collectes sur les forums et ceux des professionnels de sante enregistres dans la base francaise de pharmacovigilance et (3) analyser le type d'informations retrouvees sur internet dans le domaine de medicament et grossesse.
A Dai Yuan type Riemannian conjugate gradient method with the weak Wolfe conditions
Venue: Comput. Optim. Appl.

This article describes a new Riemannian conjugate gradient method and presents a global convergence analysis. The existing Fletcher Reeves type Riemannian conjugate gradient method is guaranteed to be globally convergent if it is implemented with the strong Wolfe conditions. On the other hand, the Dai Yuan type Euclidean conjugate gradient method generates globally convergent sequences under the weak Wolfe conditions. This article deals with a generalization of Dai Yuan's Euclidean algorithm to a Riemannian algorithm that requires only the weak Wolfe conditions. The global convergence property of the proposed method is proved by means of the scaled vector transport associated with the differentiated retraction. The results of numerical experiments demonstrate the effectiveness of the proposed algorithm.
A Tensor Analogy of Yuan's Theorem of the Alternative and Polynomial Optimization with Sign structure
Venue: J. Optim. Theory Appl.

Yuan's theorem of the alternative is an important theoretical tool in optimization, which provides a checkable certificate for the infeasibility of a strict inequality system involving two homogeneous quadratic functions. In this paper, we provide a tractable extension of Yuan's theorem of the alternative to the symmetric tensor setting. As an application, we establish that the optimal value of a class of nonconvex polynomial optimization problems with suitable sign structure (or more explicitly, with essentially nonpositive coefficients) can be computed by a related convex conic programming problem, and the optimal solution of these nonconvex polynomial optimization problems can be recovered from the corresponding solution of the convex conic programming problem. Moreover, we obtain that this class of nonconvex polynomial optimization problems enjoy exact sum of squares relaxation, and so, can be solved via a single semidefinite programming problem.
Survival and cardiovascular events in men treated with testosterone replacement therapy: an intention to treat observational cohort study.
Venue: The lancet. Diabetes endocrinology

Conflicting evidence exists for the association between testosterone replacement therapy and mortality and cardiovascular events. The US Food and Drug Administration recently cautioned that testosterone replacement therapy might increase risk of heart attack and stroke, based on evidence from studies with short treatment duration and follow up. No previous study has assessed the effect of duration of testosterone treatment on these outcomes. We aimed to assess the association between long term use of testosterone replacement therapy and mortality, cardiovascular events, and prostate cancer diagnoses, using a time varying exposure analysis.  We did a population based matched cohort study of men aged 66 years or older newly treated with testosterone replacement therapy and controls matched for age, region of residence, comorbidity, diabetes status, and index year from 2007 12 in Ontario, Canada, using data from the Ontario Drug Benefit database, the Canadian Institute for Health Information (CIHI)  We assessed the association between cumulative testosterone replacement therapy exposure and mortality, cardiovascular events, and prostate cancer using marginal models with a time varying testosterone exposure.  We included 10 311 men treated with testosterone replacement therapy and 28 029 controls between Jan 1, 2007, and June 30, 2012. Over a median follow up of 5*3 years (IQR 3*6 7*5) in the testosterone replacement therapy group and 5*1 years (3*4 7*4) in the control group, patients treated with testosterone replacement therapy had lower mortality than did controls (hazard ratio [HR] 0*88, 95% CI 0*84 0*93) Patients in the lowest tertile of testosterone exposure had increased risk of mortality (HR 1*11, 95% CI 1*03 1*20) and cardiovascular events (HR 1*26, 95% CI 1*09 1*46) compared with controls. By contrast, those in the highest tertile of testosterone exposure had decreased risk of mortality (HR 0*67, 95% CI 0*62 0*73) and cardiovascular events (HR 0*84, 95% CI 0*72 0*98) with a significant trend across tertiles (p<0*0001) Risk of prostate cancer diagnosis was decreased for those with the highest tertile of exposure (HR 0*60, 95% CI 0*45 0*80) compared with controls, but not for those with the shortest exposure.  Long term exposure to testosterone replacement therapy was associated with reduced risks of mortality, cardiovascular events, and prostate cancer. However, testosterone replacement therapy increased the risk of mortality and cardiovascular events with short durations of therapy. In view of the limitations of observational data and the potential for selection bias, these results warrant confirmation in a randomised trial. FUNDING Physicians' Services Incorporated Foundation and Ajmera Family Chair in Urologic Oncology.
Coexistence in 5G: Analysis of Cross Interference between OFDM/OQAM and Legacy Users
Venue: 2016 IEEE Globecom Workshops (GC Wkshps)

To optimize the use of the spectrum, it is expected that the next generation of wireless networks (5G) will enable coexistence of newly introduced services with legacy cellular networks. These new services, like Device To Device (D2D) communication, should require limited synchronization with the legacy cell to limit the amount of signaling overhead in the network. However, it is known that Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP OFDM) used in Long Term Evolution Advanced (LTE A) is not fit for asynchronous environments. This has motivated the search for a new waveform, able to enhance coexistence with CP OFDM. Namely, it has been widely suggested that new devices could use OFDM/Offset Quadrature Amplitude Modulation (OFDM/OQAM) to reduce the interference they inject to legacy cellular users. However, values of interference are usually measured at the input antenna of the receiver, based on the PSD of the interfering signal. We showed in previous works that this measurement is not representative of the actual interference that is seen after the demodulation operations. Building on this finding, we provide in this paper the first exact closed forms of cross interference between OFDM/OQAM and CP OFDM users. Our results prove that using OFDM/OQAM only marginally reduces interference to legacy users, in contradiction with many results in the literature.
Modeling interference between OFDM/OQAM and CP OFDM: Limitations of the PSD based model
Venue: 2016 23rd International Conference on Telecommunications (ICT)

To answer the challenges put out by the next generation of wireless networks (5G) important research efforts have been undertaken during the last few years to find new waveforms that are better spectrally localized and less sensitive to asynchronism effects than the widely deployed Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP OFDM) One of the most studied schemes is OFDM Offset Quadrature Amplitude Modulation (OFDM/OQAM) based on the PHYDYAS filter pulse. In the recent literature, spectrum coexistence between OFDM/OQAM and CP OFDM is commonly studied based on the Power Spectral Density (PSD) model. In this paper, we show that this approach is flawed and we show that the actual interference injected by OFDM/OQAM systems onto CP OFDM is much higher than what is classically expected with the PSD based model in the literature. We show that though using OFDM/OQAM in secondary systems is still advantageous, it brings limited gain in the context of coexistence with incumbent CP OFDM systems.
Passive Investors, Not Passive Owners

Passive institutional investors are an increasingly important component of U.S. stock ownership. To examine whether and by which mechanisms passive investors influence firms' governance, we exploit variation in ownership by passive mutual funds associated with stock assignments to the Russell 1000 and 2000 indexes. Our findings suggest that passive mutual funds influence firms' governance choices, resulting in more independent directors, removal of takeover defenses, and more equal voting rights. Passive investors appear to exert influence through their large voting blocs, and consistent with the observed governance differences increasing firm value, passive ownership is associated with improvements in firms' longer term performance.
CoSDEO 2016 Keynote: A decade later Challenges: Device free passive localization for wireless environments
Venue: 2016 IEEE International Conference on Pervasive Computing and Communication Workshops (PerCom Workshops)

The proliferation of RF networks coupled with the diverse and growing set of mobile devices, opened the doors for a new class of context awareness through contact free ambient sensing. Since our initial challenges paper in 2007, the field of device free passive sensing has witnessed an exponential growth; covering areas such as intrusion detection, mobile healthcare, whole home gesture recognition, traffic estimation, border protection, among others. In this talk, we give a holistic overview of the area of contact free ambient sensing based on RF technology, highlighting how it evolved over a decade from binary detection in controlled environments to commercial systems for border protection and smart homes. We also give insights about the current trends and possible future research challenges.
A review on phase change material (PCM) for sustainable passive cooling in building envelopes

The most significant threat that mankind faces in the 21th century is global warming. Buildings, which account for 40% of global energy consumption and greenhouse gas emissions, play a pivotal role in global warming. Estimates show that their destructive impact will grow by 1.8% per year through 2050, which indicates that future consumption and emissions will be worse than today. Therefore, the impact of cooling systems cannot be ignored, as they, along with ventilation and heating systems, account for 60% of the energy consumed in buildings. Passive cooling techniques are a promising alternative to conventional cooling systems. Of the various passive cooling strategies, thermal energy storage by means of latent heat is an efficient way to increase the thermal inertia of building envelopes, which would reduce temperature fluctuations, leading to the improved thermal comfort of occupants. Phase change materials (PCMs) with high density for thermal energy storage can be efficiently employed to this purpose. This paper reviews recent studies of the application of PCMs for passive cooling in buildings. From the literature, a comprehensive list of different organic, inorganic and eutectic PCMs appropriate for passive cooling in buildings are reviewed. Full scale testing and numerical modeling were found to be the most popular investigative methods used for experimental and theoretical analysis of PCMs. The combination of these two methods can provide a detailed and valid technique for PCM investigations. Finally, incorporating PCMs into building walls with macro encapsulation was also a dominant interest in previous studies.
Passive and active droplet generation with microfluidics: a review.
Venue: Lab on a chip

Precise and effective control of droplet generation is critical for applications of droplet microfluidics ranging from materials synthesis to lab on a chip systems. Methods for droplet generation can be either passive or active, where the former generates droplets without external actuation, and the latter makes use of additional energy input in promoting interfacial instabilities for droplet generation. A unified physical understanding of both passive and active droplet generation is beneficial for effectively developing new techniques meeting various demands arising from applications. Our review of passive approaches focuses on the characteristics and mechanisms of breakup modes of droplet generation occurring in microfluidic cross flow, co flow, flow focusing, and step emulsification configurations. The review of active approaches covers the state of the art techniques employing either external forces from electrical, magnetic and centrifugal fields or methods of modifying intrinsic properties of flows or fluids such as velocity, viscosity, interfacial tension, channel wettability, and fluid density, with a focus on their implementations and actuation mechanisms. Also included in this review is the contrast among different approaches of either passive or active nature.
Efficient \chi {2} Kernel Linearization via Random Feature Maps
Venue: IEEE Transactions on Neural Networks and Learning Systems

Explicit feature mapping is an appealing way to linearize additive kernels, such as kh2 kernel for training large scale support vector machines (SVMs) Although accurate in approximation, feature mapping could pose computational challenges in high dimensional settings as it expands the original features to a higher dimensional space. To handle this issue in the context of kh2 kernel SVMs learning, we introduce a simple yet efficient method to approximately linearize kh2 kernel through random feature maps. The main idea is to use sparse random projection to reduce the dimensionality of feature maps while preserving their approximation capability to the original kernel. We provide approximation error bound for the proposed method. Furthermore, we extend our method to kh2 multiple kernel SVMs learning. Extensive experiments on large scale image classification tasks confirm that the proposed approach is able to significantly speed up the training process of the kh2 kernel SVMs at almost no cost of testing accuracy.
Universal fast gradient method for stochastic composit optimization problems

We propose a new simple variant of Fast Gradient Method that requires only one projection per iteration. We called this method Triangle Method (TM) because it has a corresponding geometric description. We generalize TM for convex and strictly convex composite optimization problems. Then we propose Universal Triangle Method (UTM) for convex and strictly convex composite optimization problems (see Yu. Nesterov,  2015. for more details about what is Universal Fast Gradient Method) Finally, based on mini batch technique we propose Stochastic Universal Triangle Method (SUTM) SUTM can be applied to stochastic convex and strictly convex composite optimization problems. Denote, that all the methods TM, UTM, SUTM are continuous on strictly convexity parameter and all of them reach known lower bounds. With additional assumption about the structure of the problems these methods work better than the lower bounds.
A Backstepping Like Approach to Coordinated Excitation and STATCOM Control for Power Systems

Enhancing transient stability and voltage regulation of an electric power system is one of the challenge problems in power systems. Recently, advanced nonlinear control methods such as an immersion and invariance (I&I) control and a backstepping control have been applied on the power system. Even though the methods have been applied successfully, the controller design procedures are complicated. Thus, applying the simpler control, backstepping like method, on the power system including STATCOM is investigated in this study. The simulation results illustrate that the proposed method could achieve both desired system transiently stability and the dynamic properties under severe disturbances. Despite having a simpler design procedure, the control performance in terms of power angle stability, frequency and voltage regulation of the proposed method is almost equal as those of the I&I method. Additionally, it exhibits the superior stabilizing effect over that of the backstepping method.
An Adaptive Backstepping Coordinated Excitation and STATCOM Control for Power Systems

A new adaptive controller design for the coordinated generator excitation and static synchronous compensator (STATCOM) of an electric power system to improve the stability and performance is proposed for this study. The idea of the proposed control method is extended to a power system with a non strict feedback form. The main differences between the new technique and the classical technique are that a parameter estimation construction and an additional nonlinear gain term are introduced. In this study, the method is applied on a single machine infinite bus (SMIB) power system with STATCOM when some parameters are assumed to be unknown. Then, the developed strategy with the new parameter estimation is used for stabilizing the SMIB power system. The simulation results indicate that based on the dynamic stability properties and parameter estimation, the presented control provides better performances compared to the classical adaptive control. In addition, they show that the performance of the proposed controller is almost similar to that of the full information controller with precise information of parameters.