bluuebunny/crossref_metadata_2025 huggingface dataset:
Preoperative functional MRI use in neurooncology patients: a clinician survey
Authors: Stopa Brittany M. , Senders Joeky T. , Broekman Marike L. D. , Vangel Mark , Golby Alexandra J.
Published: February 2020

OBJECTIVE

Functional MRI (fMRI) is increasingly being investigated for use in neurosurgical patient care. In the current study, the authors characterize the clinical use of fMRI by surveying neurosurgeons’ use of and attitudes toward fMRI as a surgical planning tool in neurooncology patients.

METHODS

A survey was developed to inquire about clinicians’ use of and experiences with preoperative fMRI in the neurooncology patient population, including example case images. The survey was distributed to all neurosurgical departments with a residency program in the US.

RESULTS

After excluding incomplete surveys and responders that do not use fMRI (n = 11), 50 complete responses were included in the final analysis. Responders were predominantly from academic programs (88%), with 20 years or more in practice (40%), with a main area of practice in neurooncology (48%) and treating an adult population (90%). All 50 responders currently use fMRI in neurooncology patients, mostly for low- (94%) and high-grade glioma (82%). The leading decision factors for ordering fMRI were location of mass in dominant hemisphere, location in a functional area, motor symptoms, and aphasia. Across 10 cases, language fMRI yielded the highest interrater reliability agreement (Fleiss’ kappa 0.437). The most common reasons for ordering fMRI were to identify language laterality, plan extent of resection, and discuss neurological risks with patients. Clinicians reported that fMRI results were not obtained when ordered a median 10% of the time and were suboptimal a median 27% of the time. Of responders, 70% reported that they had ever resected an fMRI-positive functional site, of whom 77% did so because the site was “cleared” by cortical stimulation. Responders reported disagreement between fMRI and awake surgery 30% of the time. Overall, 98% of responders reported that if results of fMRI and intraoperative mapping disagreed, they would rely on intraoperative mapping.

CONCLUSIONS

Although fMRI is increasingly being adopted as a practical preoperative planning tool for brain tumor resection, there remains a substantial degree of discrepancy with regard to its current use and presumed utility. There is a need for further research to evaluate the use of preoperative fMRI in neurooncology patients. As fMRI continues to gain prominence, it will be important for clinicians to collectively share best practices and develop guidelines for the use of fMRI in the preoperative planning phase of brain tumor patients.
Tractography and the connectome in neurosurgical treatment of gliomas: the premise, the progress, and the potential
Authors: Henderson Fraser , Abdullah Kalil G. , Verma Ragini , Brem Steven
Published: February 2020

The ability of diffusion tensor MRI to detect the preferential diffusion of water in cerebral white matter tracts enables neurosurgeons to noninvasively visualize the relationship of lesions to functional neural pathways. Although viewed as a research tool in its infancy, diffusion tractography has evolved into a neurosurgical tool with applications in glioma surgery that are enhanced by evolutions in crossing fiber visualization, edema correction, and automated tract identification. In this paper the current literature supporting the use of tractography in brain tumor surgery is summarized, highlighting important clinical studies on the application of diffusion tensor imaging (DTI) for preoperative planning of glioma resection, and risk assessment to analyze postoperative outcomes. The key methods of tractography in current practice and crucial white matter fiber bundles are summarized. After a review of the physical basis of DTI and post-DTI tractography, the authors discuss the methodologies with which to adapt DT image processing for surgical planning, as well as the potential of connectomic imaging to facilitate a network approach to oncofunctional optimization in glioma surgery.
The growth of pediatric neurosurgery in southern Vietnam and the first separation of pygopagus twins: case report
Authors: Can Dang D. T. , Lepard Jacob R. , Tri Tran T. , Van Duong Tran , Thuy Nguyen T. , Thach Pham N. , Johnston James M. , Oakes W. Jerry , Dong A Tran
Published: February 2020

Conjoined twins are a rare congenital abnormality with an estimated incidence of 1:50,000 pregnancies and 1:200,000 live births. Pygopagus twins are characterized by sacrococcygeal fusion that is commonly associated with perineal and spinal abnormalities. Management of this complex disease requires a well-developed surgical system with multidisciplinary capacity and expertise.

A decade ago there were no dedicated pediatric neurosurgeons in southern Vietnam. This has changed within a few short years; there are now 10 dedicated pediatric neurosurgeons with continually expanding technical capacity. In August 2017 a multidisciplinary surgical and anesthetic team successfully separated female pygopagus twins with fused sacrum and spinal cord with associated myelomeningocele defect.

The authors present here the first successful separation of pygopagus twins in Vietnam as a representative case of gradual and sustainable pediatric neurosurgical scale-up.
Pediatric intracranial arteriovenous malformations: a single-center experience
Authors: LoPresti Melissa A. , Ravindra Vijay M. , Pyarali Monika , Goethe Eric , Gadgil Nisha , Wagner Kathyrn , Kan Peter , Lam Sandi
Published: February 2020

OBJECTIVE

Intracranial arteriovenous malformations (AVMs) are a common cause of intracranial hemorrhage in children. Exploring outcomes of treatment and factors that predict recurrence may help guide the management of pediatric AVMs. In this study, the authors review a single-center experience with pediatric AVMs, aiming to identify factors contributing to recurrence and areas for improvement in treatment.

METHODS

A single-center retrospective review of patients ages 0–18 years with AVMs in the period from 2005 to 2018 was conducted. Demographic, clinical, and radiographic data were collected and examined to compare the clinical and functional outcomes of patients managed with and those managed without open microsurgical resection.

RESULTS

One hundred five patients were diagnosed and treated during the study period. Fifty (47.6%) had been treated surgically and 35 (33.3%) nonsurgically, and 20 (19%) had been treated primarily at an outside institution and thus were excluded from further analysis. Of the 50 treated surgically, 92% had complete obliteration on postoperative imaging, with the remaining patients having residual AVM and undergoing re-resection or SRS, ultimately resulting in a 96% radiographic cure rate. The surgically treated patients were followed up for an average of 3.34 years. Eighty-two percent had a modified Rankin Scale (mRS) score of 0–2. There was a recurrence rate of 12%, with the time to recurrence averaging 327.86 days (range 85–596 days). Of the 35 patients managed without open surgery, 77% underwent serial imaging surveillance, 20% underwent endovascular embolization, and 3% underwent stereotactic radiosurgery. Radiographic cure was seen in 6% of those treated nonsurgically, and all had undergone endovascular treatment alone. The nonsurgically treated patients were followed up for an average of 2.14 years. Eighty percent had an mRS score of 0–2.

CONCLUSIONS

The data revealed that patients with lower-grade AVMs treated surgically and those with higher-grade AVMs managed without surgery have good functional and clinical outcomes. A high rate of recurrence was noted, and the possible contributing factors were explored. The authors encourage further study into mechanisms to reduce AVM recurrence in pediatric patients and look forward to advances in the medical management of lesions that are considered unresectable.
Desert locus combat
Authors: sevilmis ugur
Published: February 2020

According to 3 February 2020 update of “Locust Watch” website of FAO (http://www.fao.org/ag/locusts/en/info/info/index.html) desert locus situation is extremely alarming in Horn of Africa (Ethiopia, Somalia, Kenya, Uganda and South sudan), Red sea (Sudan, Egypt, Eritre, Yemen, Saudi Arabia, Oman) and Southwest Asia (Iran and Pakistan). Spraying pesticides is the main approach to combat desert locus currently. But this solution have adverse effects on human health and environment. Effective, alternative, sustainable solutions are urgently required to fight with this problem.China has tested chickens to combat with huge locus swarms in 2017. They obtained success where observed that one chicken can catch over 600 locusts a day and can cover half a hectare. This paper is an informing technical note on this subject including other benefits.
RANCANG BANGUN SISTEM INFORMASI MANAJEMEN SURAT BERBASIS WEB PADA KANTOR BPJS KETENAGAKERJAAN CABANG SUKABUMI
Authors: Pamulasari Wafa , Suryana Nana
Published: February 2020

Abstract: Based on the regulation of the State Minister for Administrative Reform and Bureaucratic Reform of the Republic of Indonesia Number 6 of 2011 concerning General Guidelines for Electronic Service Manuscripts within government agencies, the government requires all government agencies to draw up their respective electronic service manuscripts (correspondence administration information systems) , which refers to the guidelines in the regulation. In the process of official script administration carried out by the BPJS Employment Branch of Sukabumi City is the disposition of correspondence. Disposition is one of the important information notification media for this government agency. The disposition problem that occurs at the BPJS Employment of the Sukabumi City branch is a disposition process that requires a long time. This study aims to make it easier for secretaries, branch heads, department heads, and BPJS Employment staff to see the disposition of letters and manage existing correspondence data. Design and Development of Disposition Information Systems This letter uses the Waterfall system development method with UML (Unified Modeling Language) Tools. From the results of this website-based letter disposition system research can assist in the management, storage and search of letter archives at the BPJS Employment Office of the Sukabumi City branch.Keywords: Information systems, letters, dispositionsAbstrak : Berdasarkan peraturan Menteri Negara Pendayagunaan Aparatur Negara dan Reformasi Birokrasi Republik Indonesia Nomor 6 Tahun 2011 tentang Pedoman Umum Tata Naskah Dinas Elektronik di lingkungan instansi pemerintah, pemerintah mewajibkan semua instansi pemerintahan untuk menyusun tata naskah dinas elektronik (sistem informasi administrasi persuratan) masing-masing, yang mengacu pada panduan dalam peraturan tersebut. Pada proses tata naskah dinas yang dilaksanakan oleh BPJS Ketenagakerjaan Cabang Kota Sukabumi ialah disposisi persuratan. Disposisi merupakan salah satu media pemberitahuan informasi yang penting bagi suatu instansi pemerintahan ini. Permasalahan disposisi yang terjadi pada BPJS Ketenagakerjaan cabang Kota Sukabumi adalah proses disposisi yang membutuhkan waktu yang lama. Penelitian ini bertujuan untuk memudahkan sekretaris, kepala cabang, kepala bidang, dan staf BPJS Ketenagakerjaan untuk melihat disposisi surat dan mengelola data persuratan yang ada. Rancang Bangun Sistem Informasi Disposisi Surat ini menggunakan metode pengembangan sistem Waterfall dengan Tools UML (Unified Modeling Language). Dari hasil penelitian sistem disposisi surat berbasis website ini dapat membantu dalam pengelolaan, penyimpanan serta pencarian arsip surat pada Kantor BPJS Ketenagakerjaan cabang Kota Sukabumi..Kata Kunci : Sistem Informasi, surat, disposisi
PENERAPAN GEOGEBRA BERBASIS ELITA (E-LEARNING UNTIDAR) DI PERGURUAN TINGGI
Authors: Pamungkas Megita Dwi , Hendrastuti Zuida Ratih
Published: February 2020

Mahasiswa calon guru matematika sering menemukan konsep geometris yang sulit untuk dipahami. Hal ini menyebabkan penurunan minat dalam geometri. Tujuan dari penelitian ini adalah untuk mendekripsikan dampak menggunakan GeoGebra berbasis ELITA pada prestasi belajar mahasiswa calon guru matematika di mata kuliah geometri bidang. Sebanyak 56 siswa dipilih dari program studi Pendidikan Matematika Universitas Tidar, sebuah universitas negeri yang terletak di Magelang, Jawa Tengah, Indonesia. Kelompok eksperimen (35) diajarkan tentang melukis garis-garis istimewa pada segitiga menggunakan GeoGebra sementara kelompok kontrol (36) diajarkan menggunakan metode pengajaran konvensional. Pada akhir penelitian, prestasi belajar mahasiswa diukur dengan menggunakan post-test. Hasil penelitian menunjukkan bahwa GeoGebra berbasis ELITA adalah alat yang efektif untuk mengajar dan belajar geometri bidang di perguruan tinggi.
Relationship between Family Health Tasks and Blood Glucose Levels in Elderly Diabetes Mellitus
Authors: Hanani Tyas Aulia , Ratnawati Diah
Published: February 2020

Elderly as an individual who is at risk of encountering health problems such as diabetes mellitus because the body's functional decline requires a family health task in the form of controlling blood glucose levels that are expected to be able to overcome the problem of diabetes mellitus for the elderly. The objective of this study is to determine the relationship of the implementation of family health tasks with controlling blood glucose levels on the elderly. The research design used was descriptive-analytic with a cross-sectional approach. The population of the families who cared for and lived with elderly suffering from diabetes who are older than 60 years was 136 families, so the researchers determined the sample based on a minimum sample using the Slovin formula. The samples obtained were 102 respondents selected by the stratified random sampling method. The univariate analysis used frequency proportions, and bivariate analysis used the chi-square test. The results of this study indicate that there was a relationship between the implementation of family health tasks with controlling blood glucose levels in the elderly with diabetes mellitus with p-value = 0,000 and OR = 56,893. Based on the results of the study, it was found that the implementation of family health tasks has an important role in controlling blood glucose levels on the elderly with diabetes mellitus. The conclusion of this study was there is a significant relationship between the implementation of family health tasks and controlling blood glucose levels on the elderly with diabetes mellitus in Limo Village, Depok.
Implementasi Model Pembelajaran Kooperatif Tipe Numbered Head Together (NHT) Dalam Meningkatkan Kemampuan Berpikir Kritis Siswa Pada Pembelajaran IPS
Authors: Febrianti Fitri Ayu
Published: February 2020

Rendahnya kemampuan berpikir kritis siswa menjadi masalah krusial dalam pembelajaran IPS. Oleh karena itu, perlu adanya upaya agar pembelajaran IPS dapat menstimulus siswa untuk berpikir kritis, salah satunya dengan menggunakan model pembelajaran kooperatif tipe Numbered Head Together (NHT). Adapun rumusan masalah dari penelitian ini,“apakah terdapat pengaruh model pembelajaran kooperatif tipe NHT terhadap kemampuan berpikir kritis siswa pada mata pelajaran IPS?”. Sementara itu,tujuan penelitian ini untuk mengetahui pengaruh model pembelajaran kooperatif tipe NHT terhadap kemampuan berpikir kritis siswa pada mata pelajaran IPS. Metode penelitian yang digunakan adalah kuasi eksperimen dengan populasi terbatas yaitu siswa kelas V SDN Tanjungsari. Sampel dipilih dengan menggunakan teknik sampling jenuh, sehingga terdapat dua kelas yang dijadikan sebagai sampel, yaitu kelas VA yang berjumlah 20 orang dan VB yang berjumlah 20 orang. Kelas VA dijadikan sebagai kelas kontrol, dan mendapat model pembelajaran konvensional berbasis media gambar. Sementara itu, kelas VB dijadikan sebagai kelas eksperimen, dan mendapat model pembelajaran kooperatif tipe NHT. Instrumen penelitian yang digunakan berupa tes (pilihan ganda dan uraian), serta lembar observasi. Berdasarkan hasil analisis secara statistik, diperoleh hasil thitung sebesar 2,89 dan ttabel dengan taraf signifikansi 5% (ɑ =0,05) sebesar 2,025. Dari hasil tersebut, maka dapat dinotasikan thitung > ttabel, sehingga dapat disimpulkan bahwa terdapat pengaruh model pembelajaran kooperatif tipe NHT terhadap kemampuan berpikir kritis siswa pada mata pelajaran IPS. Kata Kunci: kemampuan berpikir kritis, model  pembelajaran kooperatif tipe NHT
Implementation of nature-like technologies in the development of new working bodies for tillage in arid conditions
Authors: Parhomenko G. G
Published: February 2020

In accordance with nature-friendly technologies, in arid conditions, the accumulation of moisture inside the soil layer is necessary. With a significant difference in the soil temperature of neighboring layers and a decrease in the thickness of the treated layer, moisture is available locally for the plant root system, without dissipation over the entire arable horizon. Purpose: improving the design of the working bodies for tillage, taking into account the zonal-natural conditions of their application. A significant difference in thermophysical characteristics can be achieved with a different structure of neighboring soil layers. The thickness of the treated layer decreases due to the differentiation of the layers during layer-by-layer subsurface tillage and a decrease in the depth of cultivation by each element of the working body. Finding the optimal shape and parameters of the cultivator, chisel and rack of paraplow type of the working body will provide the necessary formation structure to control the process of moisture accumulation in the soil, provided that the agrotechnical indicators are of high quality at a minimum cost. To reduce the resistance to crumbling of the reservoir, it is advisable to present the cultivator in the form of a curve with the property of minimum, the ellipse. The solution to the problem of transforming a paraplow-type strut from a broken line into a curved line is the differential brachistochrone equation of the first order. The parameters of the chisel for the implementation of the technological process with the least energy consumption are selected due to the rational ratio of the cross-sectional area of the treated formation. It is necessary to spend the optimal amount of energy when compressing the soil formation on the bit, creating the necessary and sufficient stress (not more than 3 kPa) to ensure high-quality crumbling of the formation without unloading in front of the working body. It is advisable to apply the principle of the golden ratio, dividing the depth of cultivation into a harmonic proportion of 62 % and 38 %. The depth of the cultivator will be 13-15 cm while the depth of cultivation is 34-39 cm.
Determination of the effect on the energy intensity of granulation of the radii of the working bodies of the press granulator
Authors: Polishchuk V. Y.U , Panov E. I , Vasilevskaya S. P
Published: February 2020

Previously unknown properties of the pressing mechanism of the press granulator with one largediameter pressing roller were revealed. Using the method of a computational experiment taking into account a previously conducted experimental study of the granulation of a semifinished product of plant origin, the energy intensity of the granulation process is determined using a mathematical model of the stress state of the semifinished product pressed in the working space of a press granulator. The dependences of the geometric parameters of the working space of the pressing mechanism are determined. Using the methods of plasticity theory, the forces of useful resistance to the motion of the annular matrix are determined. Based on them, the power of useful resistance forces is determined. Based on the calculation of the stress state of the pressed semifinished product in the pressing mechanism, the boundaries of the zone of extrusion of the semifinished product into the die plate are determined. Based on the calculation of the mass flow rate of the semifinished product at the entrance to the extrusion zone and at the exit from it, the productivity of the pressing mechanism on the unit width of the working bodies is calculated. The energy intensity of the granulation process is determined by the ratio of the power of the forces of useful resistance to the productivity of the pressing mechanism on the unit width of the working bodies. In a computational experiment, a comparison was made of the energy intensity of the pressing mechanism of the PGM-05 press granulator and the design of the pressing mechanism with the working tool radii increased proportionally by 20 %. It is shown that an increase in the radii of the matrix and roller of the press granulator by 20 % increases productivity and reduces the energy consumption of granulation. If the energy intensity of the process is the same, then productivity increases by 60...89 %. With an increase in energy intensity, an increase in productivity decreases. If the productivity is the same, then the energy intensity is reduced by 31...38 %. With increasing productivity, the drop in energy intensity decreases. Thus, we can conclude that it is advisable to increase the radii of the working bodies of the PGM-05 press granulator by 20 %.
On the relationship between +/– ratings and event-level performance statistics
Authors: Gelade Garry A. , Hvattum Lars Magnus
Published: February 2020

This work considers the challenge of identifying and properly assessing the contribution of a single player towards the performance of a team. In particular, we study the use of advanced plus-minus ratings for individual football players, which involves evaluating a player based on the goals scored and conceded with the player appearing on the pitch, while compensating for the quality of the opponents and the teammates as well as other factors. To increase the understanding of plus-minus ratings, event-based data from matches are first used to explain the observed variance of ratings, and then to improve their ability to predict outcomes of football matches. It is found that event-level performance statistics can explain from 22% to 38% of the variance in plus-minus ratings, depending on player positions, while incorporating the event-level statistics only marginally improves the predictive power of plus-minus ratings.
Naive Bayes approach to predict the winner of an ODI cricket game
Authors: Wickramasinghe I.
Published: February 2020

This paper presents findings of a study to predict the winners of an One Day International (ODI) cricket game, after the completion of the first inning of the game. We use Naive Bayes (NB) approach to make this prediction using the data collected with 15 features, comprised of variables related to batting, bowling, team composition, and other. Upon the construction of an initial model, our objective is to improve the accuracy of predicting the winner using some feature selection algorithms, namely univariate, recursive elimination, and principle component analysis (PCA). Furthermore, we examine the contribution of the appropriate ratios of training sample size to testing sample size on the accuracy of prediction. According to the experimental findings, the accuracy of winner-prediction can be improved with the use of feature selection algorithm. Moreover, the accuracy of winner prediction becomes the highest (85.71%) with the univariate feature selection method, compared to its counterparts. By selecting the appropriate ratio of the sample sizes of training sample to testing sample, the prediction accuracy can be further increased.
Comprehensive solving tasks of deep processing of titanium-magnetite ores
Authors: Kornilkov S. V. , Dmitriev A. N. , Pelevin A. E.
Published: February 2020

Despite the plants of the Ural region have significant mining capacities, they are buying raw materials from other regions, therefore the task of wastes minimization is a perspective of supporting their raw materials base. A technology was proposed to increase the quality of titanium-magnetite concentrate, comprising dividing of the ore into two technological grades – a rich and a poor ones following separate crushing and concentration of the grades at separate sections. Due to this technological scheme, the ore is divided into easy-concentrated and hard-concentrated grades at the concentration stage, but not at the stages of preparation to development, mining, transporting and crushing. The advantage of the new technology is the relative simplicity of equipment modernization, since the technological scheme of the ore processing is modified only at the concentration plant. Under laboratory conditions, an iron-vanadium concentrate with iron content of 67.1% and vanadium pentoxide of 0.6% was obtained.
Effect of the natural gas hydrogen on variation of the heat and reducing processes along the blast furnace radius
Authors: Rogozhnikov S. P. , Rogozhnikov I. S.
Published: February 2020

The expenses for the blast furnace coke are one of most significant part of the hot metal cost. To save the coke, various technologies are used, capable to replace the coke by cheaper additional fuel (AF), in particular by natural gas (NG). The injection of considerable volumes of NG results in an increase of hydrogen share in the blast furnace gases and in a significant variation in the blast furnace technology. Study of peculiarities of such variations is necessary to use the NG more effectively. Based on the mathematical model of the blast furnace process, estimation of the effect of natural gas hydrogen on changes in the heat and reducing processes along the blast furnace radius was accomplished. A formula was elaborated, confirmed by practice, for calculating the degree of hydrogen usage ηН2along the radius of the furnace. It was determined, that the reducing action of hydrogen along the furnace radius takes place unevenly –decreasing from the periphery to the axial zone of the blast furnace. To estimate the quantitative relations of the reducing action of hydrogen, parameters of the PAO “MMK” and PAO “ArcelorMittal Krivoy Rog” blast furnaces for a long period of operation were analyzed. It was determined, that in the axial and intermediate zones of a blast furnace, values of criterion RН2, designating the oxygen share in the burden removed by hydrogen, are in the range of 0.11–0.16 and weakly depend on the NG consumption. In the peripheral zone near the walls, the value of R Н 2 sharply increases to 0.22–0.27. In this zone of the blast furnace the quantity the burden oxygen, removed by hydrogen, accounts for 80–85%. Therefore, hydrogen accomplished the heat and reducing processes mainly in the peripheral zone of the furnace. At the NG consumption increase, the ore load should be increased for the peripheral zone, near the walls individually accounting hydrogen action along the furnace radius. This will make possible to increase the degree of hydrogen usage and decrease the coke consumption.
Optimalisasi Peran Guru Dalam Proses Transformasi Nilai
Authors: Sari Fatma
Published: February 2020

Study the role of the teacher as if it has never been finished to be studied because the role of the teacher has a big role in changes in students, both changes in self-quantity and self-quality. Changes in these two things need to be supported by several aspects, one of which is the optimal aspect of the teacher's role in playing each of his roles. What often happens in the learning process today is that not a few teachers play a role as instructors, transferring knowledge to students. Actually the needs of students are not only knowledge but also value, so that when teachers can optimize all their roles, what happens is that students not only increase their quantity in terms of science but also increase their quality in terms of mindset, speech, and behavior. Optimizing the role carried out by the teacher should be done comprehensively, starting from as a teacher, mentor, facilitator, and even motivator. To be a mentor, the teacher must have an understanding of the student being guided, understand the character and psychological structure. By understanding the concepts of guidance and counseling, the teacher is expected to be able to function as a guide. As a facilitator, the teacher can understand what the talents of his interests are, the teacher can build positive communication with parents of students and those who can help develop the talents of the students' interests and potential. As a motivator, teachers must understand the concepts and theories of motivation that are expected to help teachers to develop their skills in motivating their students to demonstrate superior learning or performance.
Pengaruh Kecemasan Terhadap Minat Belajar Matematika Siswa
Authors: Lisma Eryanti , Rahmadhani Rahmadhani , Siregar Machrani Adi Putri
Published: February 2020

Anxiety is a condition that arises when there is a threat of helplessness, feelings of isolation. Anxiety is also a matter of excessive concern and internalized as well as a variety of summative symptoms that cause significant disturbances in social or work functions that cause a decrease in interest in learning mathematics in students. Interest has a very important role in the learning process because interest is one of the determining factors in the success or action of the instructor's objectives to be achieved. Students who are not interested in the subject matter will show less sympathetic, lazy and not passionate attitudes. The data collection method uses a questionnaire for learning interest variables. The purpose of this study was to determine the relationship of student anxiety to interest in learning mathematics. The research subjects were 30 students. Based on the results of the study, it was concluded that: (1) there was a relationship of students 'anxiety to the interest in learning mathematics, or in other words the interest in learning mathematics at all was related by students' anxiety in their interest in learning mathematics in the face of examinations, especially in mathematics; (2) there is no relationship of interest in learning mathematics, or in other words there is no relationship of interest in learning mathematics that students have in learning mathematics. The relationship of anxiety that occurs between mathematics learning interest and anxiety is negative 0,417; (3) as a stimulus, anxiety about learning interest has a proven influence on the relationship of students' anxiety to mathematics learning interest
KEMANDIRIAN BELAJAR MAHASISWA MELALUI BLENDED LEARNING PADA MATA KULIAH MATEMATIKA EKONOMI
Authors: Wahyuni Rahmi , Nurhayati Nurhayati
Published: February 2020

Matematika Ekonomi merupakan salah satu matakuliah wajib dari prodi pendidikan Matematikan Universitas Almuslim. Penelitian ini bertujuan untuk mengetahui respon mahasiswa terhadap kemandirian belajar melalui blended learning pada mata kuliah matematika ekonomi. Penelitian ini menggunakan metode kualitatif karena data diperoleh dari para narasumber khususnya para siswa dengan metode yang lebih alamiah, yaitu mengobservasi langsung dan pembagian angket sehingga dapat mengambil suatu kesimpulan terhadap yang diteliti. Angket yang digunakan merujuk pada skala liked dengan pilihan untuk responden adalah sangat setuju, setuju, tidak setuju, dan sangat tidak setuju. Jumlah pertanyaan ada 15 pertanyaan dengan kesemuanya adalah pertanyaan positif. Berdasarkan hasil analisis data maka dapat disimpulkan bahwa, tanggapan responden terhadap kemandirian belajar mahasiswa melalui pembelajaran blanded learning pada mata kuliah matematika ekonomi sebesar 77% dari hasil tersebut maka tanggapan responden berada pada kriteria baik karena 77% ada pada rentan 68.01-84.00.

Kata kunci : kemandirian belajar, blended learning, matematika ekonomi
Russian regional finances analysis and regional debt sustainability
Authors: Sheremeta Sergei V.
Published: February 2020

Russian regions recovered financial stability in 2017—2019 due to high ruble commodities prices, improving tax collection and conservative expenditures and borrowings policy. Panel data analysis shows that social-demographic structure of population is one of the key factors of regional budgets balance. Government measures will contribute to sustainability of regional finances and reducing interregional differences in debt sustainability, but provide negative impact of regional fiscal policy on output dynamics in the coming years. Strengthening of fiscal burden via federal taxes will diminish procyclicality of regional budgets revenues, but require a return of full profit tax rate on regional level for compensating lost incomes. For improving borrowing conditions Bank of Russia and regional governments must develop placement of bonds with floating rates, indexed and amortized nominal.
ELDERLY MISTREATMENT
Authors: Zukhrufan Muhammad Huki
Published: February 2020

Elderly mistreatment atau salah perlakuan terhadap orangtua merupakan segala tindakan disengaja yang menyebabkan kerusakan atau bahaya yang serius terhadap orang lanjut usia. Salah perlakuan juga dapat didefinisikan sebagai kegagalan untuk memenuhi kebutuhan dasar dan melindungi orang lanjut usia dari bahaya. Salah perlakuan ini pada umumnya disebabkan oleh care giver atau pengasuh. Salah perlakuan terhadap orang lanjut usia dapat dicurigai terkait dengan berbagai sindrom geriatri yang terjadi. Telah dilaporkan kasus salah perlakuan terhadap pasien perempuan berusia 90 tahun. Pasien datang dalam keadaan perubahan kesadaran. Kecurigaan salah perlakuan pada pasien ini karena adanya multipel sindrom geriatri pada pasien, seperti gangguan kognitif, infeksi, dan malnutrisi serta imobilisasi dengan komplikasi ulkus dekubitus  Pada pemeriksaan fisik ditemukan konjungtiva anemis, luka lecet pada daun telinga, pada auskultasi paru dijumpai ronkhi basah halus nyaring di kedua lapangan paru dan edema pada kedua tungkai serta ulkus dekubitus yang multipel. Pasien juga mengalami malnutrisi. Pada pasien dilakukan penanganan komprehensif meliputi perbaikan status gizi, pemberian antibiotika, perawatan luka ulkus dekubitus, dan konseling keluarga.

Kata kunci: Elderly mistreatment, sindrom geriatri
HUBUNGAN OUTCOME QUALITY, INTERACTION QUALITY, PEER-TO-PEER QUALITY , HOSPITAL BRAND IMAGE, KEPUASAN DAN LOYALITAS PASIEN
Authors: Safitri Tessa , Lita Ratni Prima , Putra Abdi Setia
Published: February 2020

Pada saat ini rumah sakit dihadapkan pada peningkatan persaingan dalam mempertahankan loyalitas pasien. Hal ini terlihat dari meningkatnya jumlah rumah sakit baik pemerintah dan swasta, termasuk di Kota padang. Kunjungan berulang pasien di Semen Padang Hospital menurun jika dibandingkan dari tahun 2014 sampai dengan 2016, namun pada 2017 meningkat tapi dengan persentase yang tidak banyak. Penelitian ini bertujuan untuk mengetahui hubungan outcome quality, interaction quality, peer to peer quality, hospital brand image, kepuasan pasien terhadap loyalitas pasien poli rawat jalan Semen Padang Hospital. Jenis penelitian yang digunakan dalam penelitian ini adalah explanatory research dengan menggunakan pendekatan cross sectional secara kuantitatif, dengan sampel 165 orang pasien poli rawat jalan Semen Padang Hospital. metode pengambilan sampel yang digunakan adalah Purposive Sampling. Penelitian ini dilakukan pada April 2016 sampai Juli 2018. Analisis data dilakukan dengan teknik analisa indeks dan analisa Structural Equation Modelling- Partial Least Square (SEM-PLS) menggunakan aplikasi SmartPLS 2.0 m3.Hasil penelitian menunjukkan bahwa outcome quality dan interaction quality mempengaruhi kepuasan pasien secara signifikan, namun tidak diperngaruhi signifikan oleh peer-to-peer quality. Secara keseluruhan kepuasan pasien dipengaruhi oleh outcome quality, peer-to-peer quality dan interaction quality dengan R-Square 0,45. Hospital brand image dan kepuasan pasien juga dibuktikan mempengaruhi loyalitas pasien secara signifikan dengan R-Square 0,26.
Implementación del sistema de información Descubre, para el proceso de orientación vocacional en la I. E. “Rafael Loayza Guevara”, Cajamarca – 2018.
Authors: Paredes Caipo Luis M , Llanos Muñoz Oswaldo O. , Valdivia Vargas Liz J.
Published: February 2020

El propósito principal de la presente investigación fue determinar la influencia de la implementacióndel sistema de información Descubre, en el proceso de orientación vocacional para alumnosde la Institución Educativa Rafael Loayza Guevara, Cajamarca – 2018.Descubre, está basado en el código de identificación de personalidades (Modelo SDS BúsquedaAuto Dirigida) del psicólogo John L. Holland, que propone analizar intereses y habilidades delos alumnos para determinar su perfil vocacional y facilitar la elección de una carrera profesional.Descubre, fue aplicada en una muestra de 40 alumnos que cursan el último año de educaciónsecundaria en la Institución Educativa Rafael Loayza Guevara y un tutor, (involucrado en el temade orientación vocacional). Para lograr este fin, se hizo un análisis del proceso de orientaciónvocacional (realizando un diagnóstico de la situación actual de la Institución Educativa), y sepropuso un sistema de información denominado Descubre, como herramienta de apoyo paratutores en el proceso de orientación vocacional.Descubre se implementó como un sistema web, pero se ejecutó en una red LAN y se desarrollóbajo los paradigmas de la metodología ágil SCRUM. Además, se basa en los estándares de calidadque indica la ISO 9126 se utilizó herramientas virtuales como Jira Software y GitHub para controlde versiones, Laravel 5.5 como framework de desarrollo y MYSQL como gestor de datos.De este modo, los resultados mostraron que existe un alto grado de aceptabilidad, por parte delos alumnos, tutor y expertos, quienes afirman que el sistema Descubre sirve como una guíadidáctica, visual, entretenida y útil además, los alumnos, pueden ser orientados sobre su futuroprofesional de acuerdo a su personalidad, en un tiempo ponderado aceptable.Finalmente, se utilizó el coeficiente de correlación de Pearson para demostrar la influencia deuna variable sobre la otra, los resultados afirmaron que existe una dependencia positiva entre lasdos variables. De este modo se pudo concluir que el sistema de información Descubre, influyepositivamente en el proceso de orientación vocacional.Palabras clave: Sistema de información, orientación vocacional, perfil vocacional, guía didáctica.
Influencia de la temperatura y tiempo de residencia en la recuperación de zinc por lixiviación oxidante de esfalerita con persulfato de amonio, Cajamarca, 2019
Authors: Herrera Aldave Bella Luz , Chávez Díaz Víctor Samuel , Farfán Chilicaus Gary Christiam
Published: February 2020

Se estudió la influencia del tiempo de residencia y temperatura en la recuperación de zinc porlixiviación oxidante con persulfato de amonio. El estudio experimental se realizó utilizandoun concentrado disuelto en solución con contenidos de zinc sometida a diferentes tiempos deresidencia a 2, 4, 6 horas, y diferentes temperaturas a 20, 40 y 60 °C, con una concentracióninicial de zinc de 53.80 %. El resultado del estudio concluyó que el inicio de la recuperación dezinc a 2 horas y 20° C fue de 44.64 %; es así que se llegó a obtener una mayor recuperación de88.73 % a un parámetro de 6 horas y 40° C. Los resultados son confirmados mediante análisis devarianza para un nivel de confianza de 95%. De esto se concluye que la recuperación de zinc porla influencia del tiempo de residencia de F0 = 803.27 es mayor al F0.05; 2; 18= 3.55, y la influencia dela temperatura es de F0 = 5388.01 es mayor al F0.05; 2; 18= 3.55; y con la interacción de influenciadel tiempo de residencia y temperatura de F0 = 94.90 mayor al F0.05; 4; 18= 2.93, obtenido de maneratabular. Esto confirma la aceptación de la hipótesis alterna, por lo tanto, la influencia del tiempode residencia y temperatura de manera individual como en conjunto sí afectan significativamenteen la recuperación de zinc.Palabras clave: Lixiviación oxidante, esfalerita, persulfato de amonio, zinc
Electrocardiographic Outcome of Resynchronization Therapy
Authors: KITTNAR O. , RIEDLBAUCHOVÁ L. , TOMIS J. , LOŽEK M. , VALERIÁNOVÁ A. , HRACHOVINA M. , MLČEK M. , HUPTYCH M. , JANOUŠEK J. , LHOTSKÁ L.
Published: February 2020

Cardiac resynchronization therapy (CRT) has proven efficacious in reducing or even eliminating cardiac dyssynchrony and thus improving heart failure symptoms. However, quantification of mechanical dyssynchrony is still difficult and identification of CRT candidates is currently based just on the morphology and width of the QRS complex. As standard 12-lead ECG brings only limited information about the pattern of ventricular activation, we aimed to study changes produced by different pacing modes on the body surface potential maps (BSPM). Total of 12 CRT recipients with symptomatic heart failure (NYHA II-IV), sinus rhythm and QRS width ≥120 ms and 12 healthy controls were studied. Mapping system Biosemi (123 unipolar electrodes) was used for BSPM acquisition. Maximum QRS duration, longest and shortest activation times (ATmax and ATmin) and dispersion of QT interval (QTd) were measured and/or calculated during spontaneous rhythm, single-site right- and left-ventricular pacing and biventricular pacing with ECHO-optimized AV delay. Moreover we studied the impact of CRT on the locations of the early and late activated regions of the heart. The average values during the spontaneous rhythm in the group of patients with dyssynchrony (QRS 140.5±10.6 ms, ATmax 128.1±10.1 ms, ATmin 31.8±6.7 ms and QTd 104.3±24.7 ms) significantly differed from those measured in the control group (QRS 93.0±10.0 ms, ATmax 79.1±3.2 ms, ATmin 24.4±1.6 ms and QTd 43.6±10.7 ms). Right ventricular pacing (RVP) improved significantly only ATmax [111.2±10.6 ms (p<0.05)] but no other measured parameters. Left ventricular pacing (LVP) succeeded in improvement of all parameters [QRS 105.1±8.0 ms (p<0.01), ATmax 103.7±7.1 ms (p<0.01), ATmin 20.2±3.7 ms (p<0.01) and QTd 52.0±9.4 ms (p<0.01)]. Biventricular pacing (BVP) showed also a beneficial effect in all parameters [QRS 121.3±8.9 ms (p<0.05), ATmax 114.3±8.2 ms (p<0.05), ATmin 22.0±4.1 ms (p<0.01) and QTd 49.8±10.0 ms (p<0.01)]. Our results proved beneficial outcome of LVP and BVP in evaluated parameters (what seems to be important particularly in the case of activation times) and revealed a complete return of activation times to normal distribution when using these CRT modalities.
From Walking Bankers to Blockchain Technology The History of Payment Systems
Authors: Kriskó Andrea , Tatay Tibor
Published: February 2020

The technique and technology of payment settlement systems has completed an enormous journey from the 18th century to modern times. Nowadays, we have gone from bilateral settlements to global payment systems. Numerous payment options are available to us, from paper based settlements to mobile wallets. In my study, I am primarily tracking the development of the technology on the basis of the payment systems of the USA, introducing the primary open and closed loop systems, as well as the changing customer needs which have brought the bank card and Bitcoin to life.
TÜRKÇE ÖĞRETMENLERİNİN SÖYLEM BELİRLEYİCİSİ KULLANIMI
Authors: ÇAKIR SARI Hamide
Published: February 2020

Söylem belirleyicileri (discourse markers)
sözlü ve yazılı söylemde sıkça kullanılan birimlerdir ve bildirişimde önemli
işlevler üstlenmektedirler (Schiffrin, 1987, 2001). Söylem belirleyicileri,
konuşma içerisindeki bölümleri gösteren ve bu bölümler arasında tutarlığı
sağlayan "yani", "işte", "şimdi",
"evet", "ama", "şey" ve "tamam" gibi
dilsel öğelerdir (Özbek, 1998). Sınıf içi söylemde pek çok farklı dilsel
yapılarla birlikte, söylem belirleyicileri de önemli bir yere sahiptir. Bu
yapılar aracılığıyla öğretmenler, sınıf içinde öğrencileri
yönlendirebilmekte,  konuya yönelik
ilgilerini canlı tutabilmekte ve dersin evrelerine ilişkin değişimlere dikkati
çekebilmektedir. Diğer bir deyişle, söylem belirleyicileri, sınıf içi
etkileşimindeki ya da öğrenme döngüsündeki değişiklikleri ortaya
koyabilmektedir. Bu doğrultuda bu araştırmanın amacı, günlük yaşamda
kullandığımız söylem belirleyicilerinin sınıf içi iletişimde ne sıklıkla
kullanıldığını ve iletişimdeki işlevlerini ortaya koymaktır. Schiffrin'in
(1987) söylem modeli çerçevesinde oluşturduğu sınıflandırma, çalışmanın
kuramsal çerçevesini oluşturmaktadır.

Kesitsel
olarak planlanan bu çalışmada, Türkçe öğretmenlerinin söylem belirleyicileri
kullanımı üzerine odaklanılmıştır. Veri tabanının oluşturulma sürecinde,
mesleksel deneyim süreleri farklılaşan ve farklı ortaokullarda görev yapan 4’ü
kadın, 4’ü erkek olmak üzere toplam 8 Türkçe öğretmeni ve 7. sınıf
öğrencileriyle çalışılmıştır. 2012-2013 Eğitim Öğretim yılı güz döneminde 16
ders saati kayda alınmıştır. Öncelikle, öğretmenlere araştırmanın konusu ile
ayrıntılı bilgi verilmeden, öğrencileriyle ders sırasındaki tüm etkileşimleri
kamera ile kaydedilmiştir. Daha sonra da bu öğretmen-öğrenci etkileşimleri
yazıya dökülerek çözümlenmiş ve söylem belirleyicisi kullanımı incelenmiştir. Elde
edilen bulgulara göre, söylem belirleyicilerinin kullanım sıklığı öğretmenin
cinsiyetine, yaşına ve deneyimine göre değişiklik göstermektedir.
Phytoplankton Growth and Productivity in the Western North Atlantic: Observations of Regional Variability From the NAAMES Field Campaigns
Authors: Fox James , Behrenfeld Michael J. , Haëntjens Nils , Chase Alison , Kramer Sasha J. , Boss Emmanuel , Karp-Boss Lee , Fisher Nerissa L. , Penta W. Bryce , Westberry Toby K. , Halsey Kimberly H.
Published: February 2020

The ability to quantify spatio-temporal variability in phytoplankton growth and productivity is essential to improving our understanding of global carbon dynamics and trophic energy flow. Satellite-based observations offered the first opportunity to estimate depth-integrated net primary production (NPP) at a global scale, but early modeling approaches could not effectively address variability in algal physiology, particularly the effects of photoacclimation on changes in cellular chlorophyll. Here, a previously developed photoacclimation model was used to derive depth-resolved estimates of phytoplankton division rate (μ) and NPP. The new approach predicts NPP values that closely match discrete measurements of 14C-based NPP and effectively captured both spatial and temporal variability observed during the four field campaigns of the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES). We observed favorable growth conditions for phytoplankton throughout the annual cycle in the subtropical western North Atlantic. As a result, high rates of μ are sustained year-round resulting in a strong coupling between growth and loss processes and a more moderate spring bloom compared to the high-latitude subarctic region. Considerable light limitation was observed in the subarctic province during the winter, which resulted in divergent growth dynamics, stronger decoupling from grazing pressure and a taxonomically distinct phytoplankton community. This study demonstrates how detailed knowledge of phytoplankton division rate furthers our understanding of global carbon cycling by providing insight into the resulting influence on phytoplankton taxonomy and the loss processes that dictate the fate of fixed carbon.