bluuebunny/crossref_metadata_2025 huggingface dataset:
Some universal quadratic sums over the integers
Authors: Wu Hai-Liang , Sun Zhi-Wei
Published: December 2019

Let \begin{document}$ a,b,c,d,e,f\in\mathbb N $\end{document} with \begin{document}$ a\geq c\geq e>0 $\end{document}, \begin{document}$ b\leq a $\end{document} and \begin{document}$ b\equiv a\ ({\rm{mod}}\ 2) $\end{document}, \begin{document}$ d\leq c $\end{document} and \begin{document}$ d\equiv c\ ({\rm{mod}}\ 2) $\end{document}, \begin{document}$ f\leq e $\end{document} and \begin{document}$ f\equiv e\ ({\rm{mod}}\ 2) $\end{document}. If any nonnegative integer can be written as \begin{document}$ x(ax+b)/2+y(cy+d)/2+z(ez+f)/2 $\end{document} with \begin{document}$ x,y,z\in\mathbb Z $\end{document}, then the ordered tuple \begin{document}$ (a,b,c,d,e,f) $\end{document} is said to be universal over \begin{document}$ \Bbb Z $\end{document}. Recently, Z.-W. Sun found all candidates for such universal tuples over \begin{document}$ \Bbb Z $\end{document}. In this paper, we use the theory of ternary quadratic forms to show that 44 concrete tuples \begin{document}$ (a,b,c,d,e,f) $\end{document} in Sun's list of candidates are indeed universal over \begin{document}$ \mathbb Z $\end{document}. For example, we prove the universality of \begin{document}$ (16,4,2,0,1,1) $\end{document} over \begin{document}$ \Bbb Z $\end{document} which is related to the form \begin{document}$ x^2+y^2+32z^2 $\end{document}.
LUNG CANCER DETECTION FROM CT IMAGES USING SALP-ELEPHANT OPTIMIZATION-BASED DEEP LEARNING
Authors: Shanid Malayil , Anitha A.
Published: December 2019

Lung cancer detection has been a trending research area, as automating the medical diagnosis has significant benefits. Automatic identification of lung cancer from the CT images is considered as a significant technique in recent years. Even though various techniques are developed in the literature for lung cancer detection, designing an effective technique that can automatically detect lung cancer is challenging. Hence, this research aims to develop an automated lung cancer detection scheme through deep learning and hybrid optimization algorithm. Here, the CT images from the lung cancer database are pre-processed and provided to the lung segmentation, which is carried out by active contour. Then, the nodules in the segmented image are identified using the grid-based scheme. Several features, like intensity, wavelet, and scattering transform, are mined from the segmented image and given to the proposed salp-elephant herding optimization algorithm-based deep belief network (SEOA-DBN), for the classification. Here, SEOA is newly developed by considering the qualities of salp swarm algorithm (SSA) and elephant herding optimization (EHO). For the experimentation, lung CT images are considered from the standard database and compared with the various states of art techniques. From the results, it is evident that the proposed SEOA-based DBN achieved significant performance with 96% accuracy.
CNTFET for Logic Gates Design
Authors: Singh Gurmohan , Kaur Manjit , Kumar Yadwinder
Published: December 2019

The novel characteristics of CNTFET have eliminated many technological and fundamental hindrances being faced by CMOS transistors. CNTFET is emerging as prospective replacement for CMOS transistors in digital circuits and systems. This chapter introduces design of CNTFET-based basic logic gates. The basic logic gates analyzed are inverter, NAND, and NOR gates. The designed gates are evaluated in terms of delay, power consumption, and figure-of-merit power-delay-product (PDP). The standard H-SPICE CNTFET model of Stanford University has been used for all simulations. The impact of dielectric material variations on performance parameters of carbon nanotube field effect transistor based universal gates has been analyzed. Comparison between CMOS and CNTFET-based logic circuits is carried out for different dielectric material at 16 nm technology node.
Students and Teachers in the Digital Society to Debate Important Innovations to Change the Paradigm
Authors: Duta Nicoleta
Published: December 2019

The purpose of this study is to show the importance of innovation in classroom management. This chapter contributes to the current debate over the role of higher education in relationship to students and teachers in digital society. Internet and related technologies have already had a significant impact on ways to organize learning and studying. The chapter focuses on the preliminary phase including a written administration of a questionnaire to sample 190 students. The results obtained by analyzing the responses of the subjects have shown that both groups of students have the same opinions regarding the importance of innovation in classroom management. In conclusion, it is necessary to improve professional practice and stimulate collective capacity building, individual and collective reflection processes in solving problematic situations in academic learning to create and maintain an environment of collaboration and interaction in digital society.
Knowledge Between Scientific Method and Ritualistic Paradigms
Authors: Burlacu Mihai
Published: December 2019

Knowledge is one of most important terms of philosophy and theology, not for its theoretical value but for its ontological value. Often, knowledge is linked by sciences, and this creates a paradigm for modern thinking. Man calls scientific only that things that touch an empirical condition, and he calls knowledge only what science can confirm. But truth is a universal value that exceeds scientific mode of knowledge, and it is not reducible. Because a thing in itself cannot be known, another mode knowledge is that of revelation, where things have no particular values conferred by human mind and subjectivity, such as universal and absolute value conferred by God in rapport with His creation. So, authentic knowledge is that inspired, where things have absolute value, and that is manifested through His Revelation. Man can receive and grasp this absolutely perspective through ritualistic acts, which develop a personal communion between him and God. That knowledge doesn't have scientific rigors, but it is most deeply creating a new ontological paradigm.
Retinal Vessel Segmentation Using an Entropy-Based Optimization Algorithm
Authors: Kaur Sukhpreet , Mann Kulwinder Singh
Published: December 2019

This article presents an algorithm for the segmentation of retinal blood vessels for the detection of diabetic retinopathy eye diseases. This disease occurs in patients with untreated diabetes for a long time. Since this disease is related to the retina, it can eventually lead to vision impairment. The proposed algorithm is a supervised learning method of blood vessels segmentation in which the classification system is trained with the features that are extracted from the images. The proposed system is implemented on the images of DRIVE, STARE and CHASE_DB1 databases. The segmentation is done by forming clusters with the features of patterns. The features were extracted using independent component analysis and the classification is performed by support vector machines (SVM). The results of the parameters are grouped by accuracy, sensitivity, specificity, positive predictive value, false positive rate and are compared with particle swarm optimization (PSO), the firefly optimization algorithm (FA) and the lion optimization algorithm (LOA).
Competition in the Multi-Channel Supply Chain with a Self-Logistics-type E-Platform
Authors: Wen Yue , Wang Yongbo , Shi MingJun
Published: December 2019

Self-logistics-type e-platforms have enjoyed a rapid growth. In sales, some of them only serve as a service provider, matching buyers with sellers. But some of them have become a seller, selling directly to the customer. In logistics, some of them do not open the self-logistics to the third-party sellers, but some of them do open. As a result, a new form of channel conflict emerged. Therefore, the authors consider a self-logistics-type e-platform, who can sell directly to consumers; and a single retailer, who sells through the e-platform without self-logistics, but who may choose to contract with e-platform to deliver its products through the self-logistics. Thus, key questions for the e-platform are whether to sell directly to the customer; if they sell, the decision is whether to deliver the products through self-logistics and whether to open the self-logistics. To solve these questions, the optimal decisions of the retailer and self-logistics-type e-platforms and the system equilibrium results are analyzed under different situations. Finally, the logic tree to get the overall equilibrium is obtained.
A Safety Signaling Game for Small and Medium-sized Manufacturing Enterprises in the Supply Chain
Authors: Mei Qiang , Zhou Qiaomei , Liu Suxia , Wang Qiwei
Published: December 2019

Due to information asymmetry and a prevailing focus on production that ignores safety among small and medium-sized manufacturing enterprises (SMMEs), it is difficult for core enterprises in the supply chain (SC) to establish partnerships with SMMEs that have a high safe production level (SPL). We found that SMMEs would conceal their real SPL when being selected as core enterprise suppliers. This is known as adverse selection. According to the principal-agent theory, we built a signaling model to analyze the conditions of the pooling equilibrium and the separate equilibrium of the signaling game between core enterprises and SMMEs. The equilibrium results showed that adjusting the signal cost parameters of the SMMEs can guide the market to separate equilibrium and stop SMMEs from concealing or exaggerating their SPL. We also discuss corresponding suggestions. This research can reduce SC risks and promote the establishment of sustainable cooperative relationships between core enterprises and SMMEs with high SPLs. This study is applicable globally.
How Does Culture Impact Customer Evaluation in Online Complaining?
Authors: Sengupta Sanchayan
Published: December 2019

This article investigates how customers' cultural orientation impacts their service evaluations when complaining online on social media. Two separate scenario-based experimental studies were conducted using non-student samples from two culturally diverse countries (Germany and India). Study 1 using 83 participants from Germany and 83 from India shows that when causal explanations for service failure are given, individualists have higher perceived justice. Study 2 with 81 participants from Germany and 82 from India shows that when cognitive control is given through regular updates during service recovery to high uncertainty avoidance seekers, they show higher perceived justice. The three independent justice dimensions positively influence recovery satisfaction, with informational justice showing the strongest impact, followed by procedural and distributive justice. This research thus contributes to the nascent literature in social media complaining. Managers of online service organizations can benefit from these findings when developing their complaint management strategies.
The Impact of e-Supply Chain Management Systems on Procurement Operations and Cost Reduction in the Electronics Manufacturing Services Industry
Authors: Barrad Sherif , Valverde Raul
Published: December 2019

The article examines the effect of e-supply chain management systems in the operations and business models in the North American electronics manufacturing services (EMS) industry. A causal and descriptive research study was conducted based on a survey applied to thirty-six individuals in EMS firms in order to determine the impact of e-SCM on their key supply chain operations and business models. Results of the research revealed that e-SCM had a positive effect in the operations and business models of the EMS industry as these showed that the profits of the firm increased and internal communications was improved due to the implementation of e-SCM. The research also showed that e-SCMs have many technical issues such as problems with process automation and transmission of supply chain data, e-procurement effectiveness, integration with existing systems and the monitoring of inventory systems and the purchasing process. The research also shows how social media and the internet has affected the business models of the EMS by improving communications and operations in the overall supply chain.
Unsupervised Model for Detecting Plagiarism in Internet-based Handwritten Arabic Documents
Authors: Zaher Mahmoud , Shehab Abdulaziz , Elhoseny Mohamed , Farahat Farahat Farag
Published: December 2019

Due to the rapid increase of internet-based data, there is urgent need for a robust intelligent documents security mechanism. Although there are many attempts to build a plagiarism detection system in natural language documents, the unlimited variation and different writing styles of each character in Arabic documents make building such systems challenging. Based on its position in a word, the same Arabic letter can be written three different ways, which makes the handwritten character recognition a cumbersome process. This article proposes an intelligent unsupervised model to detect plagiarism in these documents called ASTAP. First, a handwritten Arabic character recognition system is proposed using the Grey Wolf Optimization (GWO) algorithm. Then, a modified Abstract Syntax Tree (AST) is used to match the contents of the Arabic documents to detect any similarity. Compared to the state-of-the-art methods, ASTAP improves the effectiveness of the plagiarism detection in terms of the matched similarity ratio, the precision ratio, and the processing time.
Concussion Recovery Timeline of High School Athletes Using A Stepwise Return-to-Play Protocol: Age and Sex Effects
Authors: Tamura Kaori , Furutani Troy , Oshiro Ross , Oba Yukiya , Ling Ayaka , Murata Nathan
Published: December 2019

Context

Implementation of a stepwise return-to-play (RTP) protocol has become the standard management strategy for high school athletes to ensure a safe RTP after concussion. The detailed characteristics of the recovery timeline throughout the steps of an RTP protocol have not been delineated among the adolescent population.

Objective

To investigate the days spent in each step of the stepwise RTP protocol in an adolescent population and examine the effects of age and sex on recovery time.

Design

Cross-sectional study.

Setting

Local schools.

Patients or Other Participants

Student-athletes from 57 schools.

Intervention(s)

A total of 726 patients with concussion (age = 15.5 ± 1.2 years, males = 454, females = 272) were included. The 7-step RTP protocol consists of the following steps: (1) complete cognitive rest, (2) full return to school, (3) light exercise, (4) running progression, (5) noncontact training drills and weight training, (6) full-contact practice or training, and (7) return to game play. The data were obtained by certified athletic trainers as a part of the statewide standardized concussion-management protocol.

Main Outcome Measure(s)

Days spent in steps 0 to 6 as well as a breakdown of days by sex and age.

Results

The average total RTP days were 20.2 ± 13.9. Half of this time was spent in the return-to-school phase (steps 2–3: 10.2 ± 10.0 days). Compared with 17-year-old participants, younger participants (age = 14–16 years) took 3 or 4 days longer to start step 3 and to reach step 6 (P < .05). Females took longer to reach step 6 than males (21.6 ± 15.5 versus 19.3 ± 12.7 days) because they took longer to reach step 3 (14.7 ± 11.4 days) than males (13.0 ± 10.0 days; P < .05).

Conclusions

Our study provides an estimated stepwise concussion recovery timeline for adolescent student-athletes. Clearance to start step 3 was the benchmark for the recovery timeline, as the duration of the exercise portion of the protocol was consistent across the age and sex groups.
Single-Session Video and Electromyography Feedback in Overhead Athletes With Scapular Dyskinesis and Impingement Syndrome
Authors: Du Wan-Yu , Huang Tsun-Shun , Chiu Yuan-Chun , Mao Szu-Jieh , Hung Li-Wei , Liu Mei-Fang , Yang Jing Lan , Lin Jiu-Jenq
Published: December 2019

Context

Subacromial impingement syndrome (SIS) is associated with scapular dyskinesis, or imbalanced scapular muscle activity. Evidence has shown that feedback can improve scapular control in patients with SIS. However, it is unknown whether real-time video feedback or electromyography (EMG) biofeedback is optimal for improving scapular kinematics and muscle activity during a functional task.

Objective

To compare the effects of video and EMG feedback sessions on absolute muscle activity (upper trapezius [UT], lower trapezius [LT], serratus anterior), muscle balance ratios (UT/LT, UT/serratus anterior), and scapular kinematics (anterior-posterior tilt, external-internal rotation, upward rotation) in SIS participants during arm elevation and lowering.

Design

Randomized controlled clinical trial.

Setting

Research laboratory.

Patients or Other Participants

Overhead athletes who were diagnosed with SIS and who also exhibited scapular dyskinesis (N = 41).

Main Outcome Measure(s)

Three-dimensional kinematics and EMG were recorded before and after feedback training.

Results

Lower trapezius muscle activity increased (4.2%–18%, P < .011) and UT/LT decreased (0.56–1.17, P < .013) in the EMG biofeedback training group as compared with those in the video feedback training group. Scapular upward rotation during arm elevation was higher in the video group than in the EMG group after feedback training (2.3°, P = .024).

Conclusions

The EMG biofeedback improved muscle control and video feedback improved the correction of scapular upward rotation in patients with SIS.

Trial Registration Number

ClinicalTrials.gov: NCT03252444.
Role of Cresp® in the management of chemotherapy-induced anemia in cancer patients: A real-world clinical practice audit
Authors: Biswas Ghanshyam , Pandey Avinash , Ghadyalpatil Nikhil , Lokeshwar Nilesh , Thomas Boben , Ramesh Anita , Arora Yogesh , Dodagoudar Chandragouda , Naik Vibha , Joshi Ashish , Ghosh Indranil , Roy Rakesh , Kunjahari Medhi , Singh Tejinder , Satya Palanki Dattatreya , Hingmire Sachin , Parikh Purvish M.
Published: December 2019

Introduction: Anemia is a common, underestimated problem in cancer patients receiving myelosuppressive chemotherapy and has significant adverse effect on the quality of life and outcome. Darbepoetin has been shown to be effective in this setting, but controversy surrounds it actual use. Methods: We analyzed prospectively collected clinical practice data of patients receiving darbepoetin in a real-world setting for this retrospective audit. Patients with baseline hemoglobin (Hb) of <11 g/dl were included in this analysis. Their medical records were audited using a predetermined 35-point pro forma. Results: There were a total of 274 patients with advanced cancer receiving myelosuppressive chemotherapy who had baseline Hb <11 g/dl and who were given darbepoetin. Head-and-neck squamous cell carcinoma, lung cancer, and breast cancer were the most common cancers. Their median baseline Hb was 8.9 g/dl which rose to 11.2 g/dl at the end of commenced therapy, along with improved symptomatology. There were no new toxicities, and only two patients required discontinuation of darbepoetin due to toxicity. Conclusion: Darbepoetin is safe and effective in the prevention and management of anemia among patients receiving myelosuppressive chemotherapy.
Reliability of conventional Papanicolaou smear in diagnosing bacterial vaginosis among women with clinical genital infection
Authors: Anand Kavita Vivek , Pimple Sharmila Anil , Mishra Gauravi A. , Sahare Rupali V. , Pathuthara Saleem , Deodhar Kedar K. , Shastri Surendra S.
Published: December 2019

Objective: Bacterial vaginosis (BV) is a common reproductive tract infection (RTI) reported among Indian women. BV can influence the persistence of high-risk oncogenic human papillomavirus, a causative factor for cervical cancer. BV and cervical cancer are major public health issues in a developing country like India. It becomes important for a resource-constrained country like India with poor healthcare access to implement control measures to screen and treat RTI in an attempt to prevent the risk for cervical cancer. Papanicolaou (Pap) smear is an established screening tool for cervical cancer and the diagnosis of RTIs, forms a part of its evaluation. The present study explores the validity of conventional Pap smear in diagnosing BV. Methodology: Pap smear and Gram stain smear were collected for 254 women with clinically evident cervicitis/cervicovaginitis (genital infection). Using the Nugent score on Gram stain as a gold standard, we determined the sensitivity and specificity of Pap smear to diagnose BV. Results: The overall prevalence of BV in the study population was 44% using the Nugent score. Pap smear showed sensitivity and specificity of 70.9%. (CI- 61.5% - 79.2%) and 56.8% (CI – 48.2%–65.2%), respectively. The positive predictive value of Pap smear to diagnose BV was 56.5% (CI – 47.8%–64.9%), and the negative predictive value was 71.2% (CI – 61.8%–79.4%). Conclusion: In the present study, conventional Pap smear demonstrates good accuracy to detect BV. Pap testing for cervical cancer screening can additionally serve as an effective screening tool for diagnosing BV among women with genital infection in healthcare settings.
Lymph node metastasis in extremity chondrosarcomas
Authors: Kurisunkal Vineet , Gulia Ashish , Ajay Puri , Rekhi Bharat
Published: December 2019

Bacground: Primary bone sarcomas mainly metastasize through haematogenous route and rarely through lymph nodes due to paucity of lymphatic channels in the bone (1). Nodal spread in chondrosarcoma is extremely rare and there are two reported cases in literature including one previously published by our institute (3, 5). Aims and Objectives: We present a series of chondrosarcoma cases (primary tumour located in the scapula, proximal femur, proximal humerus and pelvis), presenting with lymph node metastasis, treated at our institute. We assessed the oncological outcome of these cases and the impact of nodal metastasis on survival. Materials and Methods: Between January 2006 and December 2015, 243 patients of extremity and pelvic chondrosarcoma were operated at our institute. These cases were retrieved from a prospectively maintained database. Four (1.6%) of these patients developed lymph node metastasis. Clinical and radiological details of these cases were retrieved from electronic medical records and case files. Histopathology of the primary chondrosarcoma lesion and nodal metastasis was reconfirmed by a pathologist specializing in sarcomas. Conclusion: Lymph node metastasis though extremely rare in primary osseous chondrosarcoma, definitely affects their survival adversely. The rarity of the occurrence of lymph node metastasis in primary osseous tumors, especially chondrosarcoma highlights the need for multi institutional studies to pool knowledge and evaluate the prognostic significance and etiopathogenesis of lymph node metastasis in primary bone chondrosarcoma.
Еще раз о косой информации: ее варианты и их сравнение
Authors: Luo Shunlong , Sun Yuan
Published: December 2019

Косая информация была введена Вигнером и Янасе в контексте квантовых измерений. Позднее было признано, что косая информация, помимо своего изначального значения как меры информационного содержания состояний, допускает также несколько интерпретаций, носящих более физический и теоретико-информационный характер. В настоящее время эта величина нашла много применений в квантовой информации. Интригующей и тонкой особенностью косой информации является использование в ней квадратного корня из вектора квантового состояния (оператора плотности). С помощью сравнения косой информации с некоторыми ее естественными модификациями раскрываются математические, а также физические причины использования квадратного корня. Далее косая информация применяется для количественной оценки асимметрии квантовых состояний по отношению к представлениям группы.
Роль майораноподобных локализованных состояний в андреевском отражении и эффекте Джозефсона в случае топологического изолятора
Authors: Tinyukova Tat'yana Sergeevna , Chuburin Yurii Pavlovich
Published: December 2019

Аналитически исследованы андреевские локализованные состояния с энергией, близкой к нулю, в одномерной структуре "нормальный металл-сверхпроводник",
которая формируется на границе двумерного топологического изолятора с индуцированной благодаря эффекту близости сверхпроводимостью в присутствии поля Зеемана. Предполагается, что система открыта, это приводит к конечному времени жизни локализованных состояний. Доказано, что в топологической и тривиальной фазах существуют два андреевских локализованных состояния, которые устойчивы внутри сверхпроводника, причем их суперпозиции образуют два майораноподобных локализованных состояния. Однако идеальное андреевское отражение в топологической фазе обусловлено не майорановскими состояниями, а наличием двух андреевских локализованных состояний с противоположными спинами в сверхпроводнике (одно из них играет роль майорановского состояния). В структуре "сверхпроводник-нормальный металл-сверхпроводник" на границе топологического изолятора при малой сверхпроводящей щели в строгом подходе изучен эффект Джозефсона. В частности, найдено аналитическое выражение для зависимости тока от фазы, а также описаны волновые функции в случае нулевого тока и максимального сверхпроводящего тока Джозефсона. При максимальном токе и отсутствии потенциала возникают майорановские локализованные состояния. Оказалось, что носителями тока при определенных условиях выступают локализованные состояния с конечным временем жизни.
EMBEDDED PARTICULATE BIOMATERIALS AS DIELECTRIC FILLERS IN ELECTROACTIVE NATURAL RUBBER COMPOSITES
Authors: Bunprasert Poramin , Tangboriboon Nuchnapa
Published: December 2019

Both eggshell and eggshell membrane are potential alternative dielectric biomaterials because of their inorganic and organic matter contents, respectively. Adding eggshell or eggshell membrane into natural rubber compounds made using the sulfur curing system has many advantages such as flexibility, ease of formation, ability to operate under large strains and shape conformability, lightweight, and low cost of production. The results indicated that the natural rubber composite had a rubberlike characteristic and good elasticity. Both the eggshell and eggshell membrane acted as a dispersed-phase or dielectric filler that can absorb and store additional stress effects, resulting in fast curing and increasing crosslink density. Under a variable electrical field, eggshell and eggshell membrane particles induced dipolar moments and led to interparticle interactions that increased the storage modulus response substantially by nearly two orders of magnitude at 1.5 kV/mm. The obtained natural rubber composites can contribute toward more effective polarization and hence stronger electrostatic interactions between the embedded particles, resulting in a fast deflection response due to the dielectrophoresis force generation at low electrical field strengths of 300 and 350 V/mm for eggshell and eggshell membrane, respectively. The additional advantage of eggshell waste utilization is welcome as a means of reducing global climate warming and adding value to eggshell waste.
Impact of the Audit Committee's Characteristics on Voluntary Disclosure: The Case of the Banks Operating in Jordan
Authors: Al Ma'ani Abdullah Majed , Alawad Akram
Published: December 2019

The main objective of this study is to explore the impact of the Audit Committee's characteristics on the level of voluntary disclosure. Regression analysis was applied to verify the hypotheses, where this study used secondary data of 25 banks in the banking sector listed on the Amman Stock Exchange(ASE), for the period 2015 until 2017. The study found that there was an impact of the number of meetings of the Audit Committee on the level of voluntary disclosure, but there were no impacts, for both the size and independence of the Audit Committee, on the level of voluntary disclosure.
International Partnerships for the Development of STEM and Medical Education of Middle Eastern Women
Authors: Wang Daniel Ruiqi , Hajjar David P , Cole Curtis L
Published: December 2019

The development of a knowledge economy requires a nation to foster a robust foundation in science, technology, engineering, and mathematics (STEM). The countries of the Arab world, including the oil-rich nations of the Gulf, have made great strides in this regard, though much remains to be done. This article examines the cultural barriers these nations face, such as a lack of educational access and post-graduation employment opportunities for women, as well as systematic obstacles, such as poor quality of STEM education. The article also examines international partnerships with foreign institutions as viable solutions for the Arab world, with the case of Weill Cornell Medicine-Qatar presented as a case study of a sustainable, mutually beneficial endeavor.
China’s Accession to Government Procurement Agreement under the Trump Administration’s Trade Policy
Authors: Guo Feng , Zhou Fen
Published: December 2019

China committed to initiate the accession to Government Procurement Agreement when it entered the WTO as a compromise to the requirements made by GPA parties, mostly the developed western countries such as the United States. China started its official attempt to join the GPA on December 28, 2007 by submitting the first offer to the GPA Commission. Six revised offer were then submitted during the past years. The position of the United States and China in international trade changed dramatically since then. This article finds that Trump Administration’s attitude toward China’s accession to GPA is mixed and the US government might impede China’s accession with the analysis on the current American foreign trade policy and the latest development in government procurement in the US’s related international agreements and domestic laws. However, this accession process can only be delayed but not terminated even if the standpoint of the US is proved to be negative due to the theoretical and technical analysis on GPA. Effective and significant measures will be taken by Chinese government since the president Xi Jinping made the statement to accelerate the accession to GPA in Boao Forum in early 2018.
Study of Optical MIMO Transmission Systems Using the MGDM Multiplexing Technique
Authors: Elhajrat N. , Elouatssi O. , El Abbassi A. , Essahlaoui F. , Aftatah M.
Published: December 2019

In current local area networks, multimode fibers (MMFs), mainly graded index (GI) MMFs, are the main types of fibers used for data communications. Because of their high bandwidth, they are considered the main method of transmission that allows to offer multiservice broadband services using optical multiplexing techniques.

The MGDM (ModeGroup Division Multiplexing) is a Multiplexing technique, which aims to improve the performance of the multimode optical fiber by spatially multiplexing the data streams to be transmitted. In this work, we study optical MIMO (multi-input multi-output) transmission systems on an MMF optical fiber, specifically the adaptation of the architecture of MIMO transmission systems. In this context, we have studied the mode group multiplexing technique (MDGM), to evaluate the transmission capacity. In fact, the latter depends on the injection conditions and the state of the optical fiber.
Cuando los suburbios dejaron de ser periferia. La lucha por el control de la calle en el Madrid de los años 1930
Authors: Hernández Quero Carlos , De la Cruz Salanova Luis
Published: December 2019

Durante el período de entreguerras los suburbios de las grandes ciudades occidentales se convirtieron en el espacio por excelencia de la política de masas. Este artículo propone un análisis a ras de suelo de la lucha política en los barrios madrileños de Cuatro Caminos y Tetuán. En un primer momento se realiza una aproximación a la vida social de sendos suburbios y se subraya su situación de abandono por las distintas administraciones liberales. A continuación, se estudian dos de los principales conflictos que tuvieron lugar en sus calles en los años treinta. Por un lado, se analizan los enfrentamientos derivados de la propaganda fascista en un medio que las organizaciones revolucionarias consideraban propio. Por otro, se abordan los actos de boicot que los anarquistas, fuertes en los suburbios, llevaron a cabo contra los socialistas. En el texto se sostiene que ambos conflictos se entienden mejor a la luz de la cultura política forjada en los suburbios durante décadas.
Investigação de Novas Estratégias para o Ensino de Bioquímica Estrutural por meio de Realidade Aumentada
Authors: Alves Alan Ferreira , Felipe Cícero Francisco Bezerra , Machado Liliane S.
Published: December 2019

Este estudo buscou investigar as dificuldades dos alunos da disciplina Bioquímica Estrutural e a utilização de tecnologias de realidade aumentada como apoio no processo de aprendizagem. O trabalho ocorreu em três fases: 1) aplicação de questionário identificando as dificuldades dos alunos com a disciplina; 2) desenvolvimento de um protótipo com tecnologia de realidade aumentada; 3) uso do protótipo e aplicação de questionário acerca dos benefícios identificados com a tecnologia de RA no processo de aprendizado. Verificou-se que uma das maiores dificuldades dos alunos consistiu na a visualização espacial de biomoléculas e que a criação de um aplicativo baseado em RA poderia ser uma ferramenta importante no processo de aprendizagem na disciplina em questão.
Virtualização de Jogos Matemáticos: uma Avaliação do Cubra Doze
Authors: Silva Ana Carolina Santos , Falcão Taciana Pontual
Published: December 2019

A presente pesquisa é norteada pelo uso crescente de jogos na educação, como uma metodologia de ensino que une diversão, raciocínio lógico, planejamento estratégico, entre outros aspectos. Com a crescente ubiquidade de dispositivos tecnológicos no cotidiano das pessoas, utilizar-se da tecnologia digital na educação é uma tendência inevitável. Visando aproximar os resultados positivos dos jogos tradicionais no ensino, e a crescente demanda e interesse de crianças e jovens por jogos digitais, o objetivo dessa pesquisa é analisar as contribuições da versão digital de um jogo educacional sobre as operações básicas de Matemática. Para isso, foi transformado o jogo Cubra Doze em uma versão digital e conduzido um estudo com estudantes do 1º ano do Ensino Médio para aferir a motivação e aspectos de Interação Humano-Computador com o jogo. Os resultados revelaram que houve resultados positivos tanto em relação ao engajamento em aprender utilizando um jogo digital como na colaboração e conteúdo educacional atrelado a ele, demonstrando assim que jogos são boas ferramentas educacionais.
O Uso de Dispositivos Móveis para o Tratamento da Informação: uma Revisão Sistemática de Literatura
Authors: de Melo Elvis Medeiros , Maia Dennys Leite
Published: December 2019

Por meio de Revisão Sistemática de Literatura (RSL) realizada em anais de congressos na área de Tecnologia Educacional, a presente pesquisa teve como propósito identificar artigos de 2014 a 2017 que versassem sobre o uso de dispositivos móveis para o Tratamento da Informação (TI). Os resultados mostram que, apesar de recentes as pesquisas envolvendo práticas com dispositivos móveis para o Tratamento da Informação, há um aumento na produção nos últimos anos, além disso, não houve pesquisas que fizessem o uso de aplicativos para smartphones para TI.
A Comunicação, a Colaboração e o Diálogo pela Web: uma Evidência
Authors: Rodrigues Júnior José Florêncio , Véras Sonia Carvalho Leme Moura
Published: December 2019

O presente artigo tem como objetivo analisar a percepção de professores e alunos de cursos virtuais em relação à comunicação e à colaboração como fatores favorecedores da construção do diálogo entre alunos pela modalidade a distância. A metodologia de pesquisa seguiu o formato híbrido, por meio da coleta de percepções, sendo utilizados dois instrumentos: um questionário para tutores e uma entrevista semiestruturada com alunos. Como referencial teórico foram analisadas as contribuições de Vygotsky, Maçada/Tijiboy, Palloff/Pratt e Freire. Através da análise dos resultados foi percebido que a colaboração entre alunos por meio de estratégias de interação como fórum, wiki, aprendizagem baseada em problemas e estudos de caso podem contribuir para a dialogicidade que gera consequentemente a retenção e certificação de alunos nos cursos e para a construção de novos conhecimentos. Compartilhar conhecimentos e construir coletivamente foram as duas grandes vantagens evidenciadas pelos depoimentos.
Projeto Colmeia: Gamificando no Ensino Superior
Authors: da Silva Paulo André
Published: December 2019

Este artigo descreve um processo de gamificação em disciplinas pedagógicas para curso de licenciatura. O projeto Colmeia visa integrar ações motivacionais com conteúdos próprios das disciplinas de ‘Didática’ e ‘Avaliação da Aprendizagem’, dentro de uma narrativa inspirada na vida das abelhas. Objetiva envolver estudantes em atividades motivacionais, relacionadas com dados da realidade, conteúdos, desenvolvimento de competências e habilidades e ações práticas em escolas. Utilizamos diversas ferramentas digitais para promoção de ações criativas na resolução de problemas, de forma a conduzir ao cumprimento da missão principal do jogo.
Programadores do Amanhã: Introdução ao Pensamento Computacional na Educação Básica
Authors: de Souza Givanaldo Rocha , Nunes Stephanny Kawany M. , do Nascimento Marília Barbosa C. , Ferreira Estevão Henrique L.
Published: December 2019

Este artigo tem como objetivo descrever o relato de experiência de um curso de introdução ao pensamento computacional na educação básica por meio da programação em blocos usando o Scratch. Para isso, foram analisadas as experiências vividas no projeto Programadores do Amanhã, o qual consiste em levar para alunos de escolas públicas o conhecimento em Programação de Computadores, realizado por alunos do curso técnico integrado em Informática e do curso superior de Tecnologia em Sistemas para Internet, ambos do Instituto Federal de Educação, Ciência e Tecnologia (IFRN), Campus Parnamirim.
"Mãe Quilina”: um Vídeo de uma Escola do Campo e seu Alcance nas Redes Sociais
Authors: Pinto Cláudio Rogério do Nascimento
Published: December 2019

Este artigo tem por objetivo analisar o alcance nas redes sociais de um vídeo produzido por estudantes do 3º ano do Ensino Médio do Colégio Estadual Leôncio Pereira dos Santos, localizado no povoado Estêvão, em Alagoinhas-BA. Pretende-se relatar as menções feitas ao vídeo “Mãe Quilina” no You Tube e no Facebook após o compartilhamento daquele audiovisual nestas redes sociais. Para tanto, foram verificados o quantitativo de visualizações, curtidas, comentários e compartilhamentos ocorridos em cada um dos ambientes virtuais. Na análise qualitativa, os internautas estabeleceram uma relação do vídeo com os costumes do passado ou das histórias pessoais e familiares diretamente ligadas à parteira, tornando-se um meio para conhecer uma das dimensões da história local.
Desenvolvimento de um Protótipo de Identificação do Nível de Escrita para Dispositivos Móveis: uma Ferramenta de Sondagem no Ensino
Authors: Lima Claudemir J. , Oliveira Elidiene G. , Callou Gustavo , Cysneiros Filho Gilberto Amado de Azevedo
Published: December 2019

A sondagem do nível de escrita do estudante é muito importante para o professor direcionar suas práticas com atividades que promovam o avanço da escrita. Há poucos aplicativos que realizam a sondagem do nível de escrita, dessa forma, esse artigo descreve a criação de um protótipo NEA (Nível de Escrita Alfabética) para realização de sondagem do nível de escrita no processo de alfabetização que é embasado na Psicogênese da língua escrita. Os resultados parciais do protótipo, segundo o professor participante de uma escola municipal da rede pública do Recife, contribuíram para a construção de um instrumento de avaliação diagnóstica do nível de escrita dos estudantes. A parceria do profissional na área pedagógica e tecnológica para criação do aplicativo educacional está sendo essencial.
Projeto Colmeia: Elaboração de Site Educacional como Ferramenta para a Gamificação
Authors: Santos Vinicius M. da Silva , Carvalho Maria E. A. , Silva Ricardo P. , Silva Paulo A.
Published: December 2019

Este trabalho tem como objetivo relatar a construção de um site para o projeto de extensão Colmeia Game, como elemento auxiliar no processo de gamificação das disciplinas de Didática e Aprendizagem. Visa promover a melhor experiência dos alunos envolvidos no projeto. O site foi criado usando a plataforma unificada WIX SITE, que permite criar sites HTML5 e sites móveis. O site foi desenvolvido durante o primeiro semestre de 2019, buscando abordar um problema percebido em relação à imersão dos alunos na narrativa do jogo. Este site é uma ferramenta de suporte para o processo de gamificação. Espera-se que permita aos educandos maior acesso à informação e consequente interação.
Recurso Educacional Digital (RED) para Trabalhar o Gênero Cardápio: Qual o seu Pedido?
Authors: Freire Raquel S. , Figueiredo Mércia V. Campos , Hitzschky Rayssa A. , Sousa Danilo C. , G. Júnior Francisco Gilson , de Castro Filho José Aires
Published: December 2019

O RED “Qual é o seu pedido?” foi desenvolvido a partir das concepções da Base Nacional Comum Curricular (BNCC), com o objetivo de trabalhar com a leitura e a produção de cardápios. Por meio de situações de interação com o gênero, este recurso explora a compreensão do cardápio a partir de sua funcionalidade e organização composicional, tais como entrada, prato principal, sobremesa e bebida. Com o desenvolvimento do recurso, espera-se trazer um repertório de pratos diversificados, de maneira que os estudantes em processo de alfabetização e de letramento possam observar diferentes ortografias, ampliar seu vocabulário e conhecimento de mundo e perceber como a culinária envolve uma construção histórica e cultural.
Um Jogo para Dispositivos Móveis com o Objetivo de Auxiliar a Aprendizagem de Libras, ELiS e Português
Authors: do Nascimento Igor Victor Lucena , Falcão Taciana Pontual
Published: December 2019

Existem milhões de pessoas com alguma deficiência auditiva no Brasil, e a maioria destes indivíduos, têm alguma dificuldade de comunicar-se por meio da Língua Portuguesa e, consequentemente, com a sociedade. A língua mais usada pelos Surdos no Brasil é a Libras (Língua Brasileira de Sinais) que se expressa por meio de gestos e expressões faciais. Essa língua tem a sua própria escrita, uma delas é o ELiS, ou Escrita de Língua de Sinais, que auxilia no processo de alfabetização das crianças surdas em Português. Diante disso, o presente artigo é sobre a criação de um jogo de memória para dispositivos móveis, desenvolvido por meio da plataforma Unity, que auxilie as crianças surdas na alfabetização e aquisição da Libras, ELiS e Português.
Structural Alterations of Zirconia Depending on Sintering Parameters and Effects on Bond Strength After Different Surface Treatments
Authors: COSKUN Mehmet Emre , ÇELENK Mehmet Fehim
Published: December 2019

Objectives:
Zirconia having different physical and optical properties is obtained
after the application of different sintering parameters. This study aims to investigate structural variations
after administering different sintering protocols and to evaluate the effect of
different surface treatments on shear bond strength.Materials and Methods: Eighty translucent zirconia specimens (7x3 mm)
were divided into two different sintering groups (1480 0C for 180
min; 1510 0C for 30 min), then divided into four subgroups according
to surface treatments: control, sandblasted, Er-YAG, and Nd-YAG (n:10). One specimen from each group was analyzed with XRD and
one from each subgroup was analyzed with SEM. Ceramics (5x3 mm) were fired onto
the zirconia for shear bond strength test using universal testing machine and
the failure mode was determined by using stereomicroscope. Translucency
and contrast ratio were measured by using spectrophotometer, and biaxial
flexural strength test performed by employing universal testing machine on
specimens with a diameter (15x1,3 mm) from each sintering group (n:10). Data was analyzed by using
two-way ANOVA and Bonferroni Post hoc tests (P<.05).Results: The short
sintering group showed higher biaxial flexural strength (943.87±48.69 MPa). The
highest surface roughness values were obtained in short sintering groups and
within the groups Nd-YAG application was found the most effective method
(4.11±0.28 Ra). The highest bond strength value was obtained in sandblasted
short time sintered group (29.71±2.52 MPa). The translucency and contrast ratio
showed no significant difference.

Conclusion: Although a physically stronger zirconia is
obtained by short sintering process, long-term sintered zirconia forms a more
durable bond strength with ceramics. Sandblasting improve the ceramic-zirconia
bond strength may have more benefits than the use of Er-YAG, and Nd-YAG lasers.
Hildegard de Bingen: uma intelectual diante da religião — conhecimento e política
Authors: Oliveira Terezinha
Published: December 2019

O objetivo deste artigo é analisar a figura feminina de uma das personagens mais importantes do conhecimento ocidental cristão no século XII, Hildegard de Bingen (1098-1179). Monja beneditina, autora de muitas obras de cunho “científico”, moral e religioso e de muitas cartas, das quais mais de uma centena foi preservada. Além disso, compôs partituras musicais. Assim, por meio de seus escritos, evidenciaremos que, mesmo de dentro do mosteiro, essa personagem estabeleceu relações com pessoas muito influentes do seu tempo, o que nos permite afiançar que suas ideias circularam e interferiram na sociedade do seu tempo. As fontes do nosso estudo são o livro Scivia e uma de suas Cartas, dirigida ao abade Bernardo de Claraval (1090-1153). Nossas reflexões buscarão explicitar, por meio de uma abordagem histórica de “longa duração”, que os seus escritos nos permitirão um duplo caminho. De um lado, recuperar a memória de escritos femininos – obras de Hildegard – nos permite afirmar que a figura feminina esteve presente e atuante, como autora e intelectual, na sociedade medieval cristã do século XII e, portanto, a mulher ocupa lugar na história desde há séculos. De outro, trazero debates sobre uma fonte feminina cristã medieval, pode contribuir com a construção de novos olhares para o campo da história da educação brasileira.
Semper Parata: catolicismo e bandeirantismo no Brasil
Authors: Orlando Evelyn Almeida , Silva Alexandra Lima da
Published: December 2019

Neste trabalho se procura discutir a dimensão religiosa presente no bandeirantismo no Brasil a partir da análise de impressos, com destaque para o periódico Bandeirantes, criado em 1928 pela Companhia do Coração de Jesus e dirigido por Maria de Lourdes Lima Rocha. Fundada em 1919, a Federação Bandeirante ainda existe até os dias atuais. O nome bandeirantismo foi sugestão do intelectual católico Jonathas Serrano. Apesar de o princípio elementar do bandeirantismo não estar ligado a nenhuma religião ou crença, é possível aferir que o movimento no Brasil esteve fortemente entrelaçado com um discurso religioso e moral na conformação da “boa bandeirante”, que deveria ser devotada e dedicada à promessa de servir a Deus e a pátria, cuja base é claramente católica.
Potential of Using Imidazoline in Recycled Asphalt Pavement
Authors: Jurczak Robert , Mieczkowski Paweł , Budziński Bartosz
Published: December 2019

The environmental considerations need to be taken into account in any road resurfacing and upgrading project, for example, by reusing asphalt rubble for production of new pavement courses. Mixtures containing larger amounts of recycled asphalt pavement are improved by adding rejuvenator additives. The tests performed on the recycled asphalt mixtures containing lard imidazoline confirm the suitability of this agent for paving applications. Lard imidazoline was found to improve the stiffness modulus, fatigue performance and resistance to the action of water and freezing temperatures. The parameters obtained at the optimum content of additive complied with the criteria defined for virgin asphalt concrete and other mixtures of that kind.