bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALISIS KESULITAN PEMAHAMAN KONSEP DAN PRINSIP MATERI POKOK DIMENSI TIGA SISWA KELAS XI SMK KEPERAWATAN YAHYA BIMA
Authors: Syahrir Syahrir , Kusnadin Kusnadin , Nurhayati Nurhayati
Published: January 2019

The results of observations in class XI SMK Health Nursing Yahya Bima note that students still think that math is hard and scary that students often find it difficult when working on math problems. Student difficulties in learning mathematics are also characterized by low daily test results mathematics class XI student of SMK Nursing Yahya Bima. Therefore it is necessary to do an analysis of learning disability and the factors that influence the students' learning difficulties in learning mathematics in particular three-dimensional. This research is a descriptive study conducted on 64 students of class XI SMK Yahya Nursing Bima. Data collected by the method of three-dimensional tests and questionnaires. Tests that have been declared valid and reliable research subjects used to determine which students who received grades of less than KKM defined as research subjects. Questionnaire is used to determine the internal factors and external factors that greatly affect the students' learning difficulties in studying the three-dimensional. Data analysis techniques used in this research is descriptive qualitative and quantitative analysis. The results showed that as many as 33 students have difficulty in solving the three-dimensional, it is due to students 'difficulties in providing examples of specific concepts, students' difficulty in giving up the name space, difficulties in classification, less skills students in basic skills, calculation errors, procedural errors , students are not mastering algorithms and do not understand the basic concepts. Factors - factors that cause learning difficulties students have great influence on quite a high level of learning difficulties experienced by students of class XI Vocational Nursing Yahya Way in three dimensions is the subject matter of interest, motivation, talent and intelligence of students who are on average relatively less and methods applied teachers including the use of visual aids in teaching the less even very low.
SECONDARY IMMUNITY RESPONSE OF MENCIT BALB / C (MUS MUSCULUS) EXPORTED BALI COW TESTISICULAR EXTRACT (BOS SONDAICUS)
Authors: Primawati Sri Novita
Published: January 2019

Based on previous research by observing leukosit ploriferation of Balb / c mice given Balinese cow testical extract which showed significant result on observation to 72 hours after injection, while at 3 hours and 24 hours is not significant, it is suspected that the immunological response given to testicular extract a secondary immune response. This study aims to determine the ploriferation of Balb / c mice leukocytes exposed at some observation time, whether these include primary or secondary immune responses. Therefore it is necessary to do further research by adding exposure time of 1 day, 3 days, 5 days, and 7 days with only one exposure Con A (at 0 hour only). This study was designed with a complete randomized factorial design. The data obtained were analyzed by ANOVA analysis using F test. The results of this study showed that the influence of immunosuppression was highest on the third day (72 hours) and disappeared on the seventh day. This shows that the immunological response shown during observation of leukocyte proliferation of Balb / c mice is a secondary response.
PENGEMBANGAN PERANGKAT PEMBELAJARAN BERBASIS KEUNGGULAN LOKAL PADA MATAPELAJARAN FISIKA SMA
Authors: Hikmawati Hikmawati
Published: January 2019

Penelitian ini bertujuan untuk mengembangkan perangkat pembelajaran berbasis keunggulan lokal pada matapelajaran Fisika SMA. Keunggulan lokal yang dimaksud adalah objek wisata seperti pantai, gili, dan air terjun. Model pengembangan perangkat pembelajaran yang digunakan adalah model 4-D (Define, Design, Develop, Disseminate). Perangkat pembelajaran yang dikembangkan terdiri atas Silabus, Rencana Pelaksanaan Pembelajaran (RPP), Buku Guru, Buku Siswa, Lembar Kegiatan Siswa (LKS), dan Tes Hasil Belajar (THB). Pada tahap Define dilakukan penetapan dan pendefinisian syarat-syarat pembelajaran. Pada tahap Design dilakukan penyusunan prototipe perangkat pembelajaran. Pada tahap Develop dilakukan validasi perangkat pembelajaran oleh Pakar yang dilanjutkan dengan revisi. Tahap Define, Design, dan Develop dilaksanakan mulai Maret hingga Juni 2014. Tahap Disseminate akan dilakukan pada September 2014 untuk menguji efektivitas penggunaan perangkat pembelajaran di Kelas. Rentang skor penilaian Validator terhadap perangkat pembelajaran yang dikembangkan adalah 1 (tidak baik) hingga 4 (sangat baik) ditinjau dari aspek: format, isi, dan bahasa. Nilai yang diberikan oleh Validator adalah 3 dengan kriteria baik sehingga dapat disimpulkan bahwa perangkat pembelajaran berbasis keunggulan lokal pada matapelajaran Fisika SMA dapat digunakan dengan sedikit revisi
PENGEMBANGAN KARAKTER RELIGIUS SISWA MELALUI PENERAPAN CONTEXT RICH PROBLEMS YANG TERINTEGRASI DALAM PEMBELAJARAN KIMIA PADA MATERI IKATAN KIMIA
Authors: Wahyuni Sri , Khaeruman Khaeruman , Khery Yusran
Published: January 2019

The concept of chemistry is difficult and complicated because it is abstract. Students are encouraged to have a religious mindset. The current learning process in chemistry subjects is still teacher-centered. Different students' understanding needs to be addressed. Therefore, low-ability students can not understand the concepts; consequently the students' learning outcomes and mindset are less religious while learning chemistry. An effort for students to think religiously and improve student learning outcomes is through the use of learning methods and adequate learning resources to improve learning activities and students more active in the learning process. This problem can be solved by developing the 'religious character' of students through the application of Context Rich Problems. This research is PTK (class action) with qualitative and quantitative approach. This research was conducted in MA Nahdlatus Shaufiah Wanasaba. Sampling using simple technique. The sample of the research is the students of class X. The results show that, the religious character and learning outcomes from cycle to cycle have increased. The average score of the students' religious characters in the first cycle was 66.67% and the second cycle was 94.63%. The completeness of each learning outcomes in the first cycle is 44.44% and cycle II is 92.59%. We conclude that the development of the religious character of the students through the application of integrated Context Rich Problems can be used as an alternative to enhance the ability of religious character and student learning outcomes.
Validitas Modul Kimia Berbasis Problem Based Research PBR pada Materi Larutan Elektrolit dan Nonelektrolit
Authors: Dewi Citra Ayu , Handayani Teti Fitri
Published: January 2019

The purpose of this study was to determine the validity of the module based on Problem Based Research (PBR) on electrolyte and non-electrolyte solution material. This research is a descriptive qualitative research to assess and obtain chemical modules on electrolyte solution and non-electrolyte material based on Problem Based Research (PBR). Module development in this study follows the three stages of the ADDIE model, namely, the analysis stage (Analyze), the design stage (Design), and the development stage (Development). Data obtained using questionnaires. The results of the expert lecturer validation showed that the module is valid with a percentage of 81.5%. The results of the expert validity test showed a validity percentage of 92.5%. Furthermore, the group trial was limited to 10 students, the responses were obtained that the aspects of language, readability, and appearance of the module were very good. These results indicate that the Problem Based Research (PBR) -based module on electrolyte and non-electrolyte solution material is developed valid to be continued at the implementation stage, and evaluation.
Pengaruh Pendekatan Inkuiri Terbimbing dipadu dengan Diagram Alir terhadap Prestasi Belajar Siswa SMA
Authors: PAHRIAH PAHRIAH
Published: January 2019

This study aims to compare student achievement in teaching chemical equilibrium topics using a guided inquiry approach combined with and without flow charts. This research is a quasi-experimental study with a pretest-posttest control group design. The study sample consisted of 31 experimental class students and 24 control class students. The instruments in this study consisted of two types, namely (1) the instrument of treatment in the form of learning devices using a guided inquiry approach combined with flow diagrams in the experimental class students and guided inquiry learning in control class students, while (2) measurement instruments in the form of learning outcomes tests students, student activeness observation sheets, and student performance assessment sheets. The instruments are declared valid by 2 chemistry lecturers and 1 chemistry teacher who has good competence and experience in chemistry and chemistry learning. The results showed that the guided inquiry approach combined with the flow diagram provided students’ cognitive learning achievements (83.87 experimental classes and 70.83 control classes), affective (79.00 experimental classes and 74.00 control classes), and psychomotor (84.00 experimental class and 80.00 control class) were better than guided inquiry approaches without flow diagrams.
Pengaruh Metode Make A Match Terhadap Aktivitas, Minat dan Hasil Belajar Siswa pada Pembelajaran IPA
Authors: Herisnawati Herisnawati , Nurhidayati Siti , Wijayanti Tri Sari
Published: January 2019

The study aims to determine the effect of the Make A Match method on the activities, interests, and learning outcomes of class VIII students of MTs Darussalam Bermi West Lombok. The population in this study were all eighth-grade students of MTs Darussalam Bermi, while the study sample was 58 students. Class VIII C as the experimental class and class VIII D as the control class. The sampling technique uses purposive sampling. The research instrument used was an observation sheet to obtain data on learning activities, questionnaires for learning interest data, and tests for student learning outcomes. Based on the results of the analysis of student activity data in the control class, an average value of 71 was obtained with the active category, while the experimental class obtained an average value of 78 with a very active category. The average learning interest of students in the control class is 36.39 with a less high category, then in the experimental class, the average student interest is 45.73 with a fairly high category using the Make A Match method. Analysis of student learning outcomes data obtained an average value in the experimental class of 82.4 with the highest value of 100 and the lowest 72, while the average value of the control class was 76.1 with the highest value 88 and the lowest value 64. Based on the results of the t-test obtained t count is 17.43 and t table is 1.67, because tcount ≥ ttable, then there are differences in activities, interests, and learning outcomes using the Make A Match method in class VIII students of MTs Darussalam Bermi. Based on these results it can be concluded that there is an effect of the Make A Match method on science learning outcomes of class VIII students of MTs Darussalam Bermi.
Pengembangan Perangkat Pembelajaran berbasis Brain-Based Learning untuk Meningkatkan Hasil Belajar Siswa
Authors: Khafid Ainul
Published: January 2019

The purpose of this research is to produce teaching materials based on Brain-based learning that appropriate to improve student’s learning achievement on the topic of salt hydrolysis. The development models of teaching materials used 4-D models using one group pretest-posttest design. The subjects of the research were teaching materials based on Brain-based learning that tried to 30 students of XI grade MIA 1 MA Nahdhatul Ulama Sidoarjo in academic year of 2015/2016. The data-collecting techniques in this research were validation, observation, test, and questionnaire. The results showed that (1) the validity of the lesson plans, student book, worksheet, and learning achievement test were valid; (2) the readability level of student book and worksheet were good category; (3) learning feasibility were good category; (4) the students activities refers to student-centered learning; (5) majority of students gave positive response to learning process; (6) all of students achieved learning completeness criteria on aspect of cognitive, attitudes, and skills. Based on these results, it could be concluded that the teaching materials based on Brain-based learning were appropriate to improve student’s learning achievement on the salt hydrolysis topic.
Implementasi Metode Pembelajaran Diskusi Kelompok untuk Meningkatkan Keterampilan Proses Sains dan Hasil Belajar Siswa
Authors: Rus Aipan , Fatmawati Ani , Muliadi Agus
Published: January 2019

The purpose of this study was to improve science process skills and cognitive learning outcomes of class XI students of Middle 1 Praya Middle school year 2017/2018. The subject of this study were 31 students of class XI IPA-3 Praya Tengah as many as 31 people. This type of research is classroom action research conducted in two cycles. Data collection techniques used observation techniques for the implementation of learning, and tests as many as 20 questions. The results of the learning implementation observation in the first cycle = 41% and in the second cycle was 66%. Cognitive learning outcomes of students reach an average in the first cycle of 56.6 with classical completeness of 38.70% and experienced an increase in the second cycle with an average of 64.35 with classical completeness of 54.83%. Thus, the method of group discussion can improve science process skills and cognitive learning outcomes of class XI Middle Praya 1 Middle School 2017/2018 academic year.
Pengaruh Integrasi Model Pembelajaran Think-Pair-Share dengan Make A Match terhadap Aktivitas dan Hasil Belajar Siswa
Authors: Lestari Dayu Janua , Samsuri Taufik , Adawiyah Siti Rabiatul
Published: January 2019

This study aims to determine the effect of the integration of think pair share learning models with make a match toward the students’ activities and cognitive learning outcomes of class X MA Raudlatusshibyan NW Belencong. This study was a quasi-experimental research with posttest-only control group design. The population in this study were 55 students of class X which were divided into 2 classes. The sample in this study is class X.1 and class X.2 using saturated sampling techniques. Data collection is done by using instruments in the form of observation sheets and student learning outcomes tests. Based on the data analysis, the results of the observation of the learning activities of the experimental class students with an average value of 10.70 are in the active category, while the average value of the control class is 4.96 in the moderately active category. Based on the results of the data analysis it can be seen that the student learning activities of the experimental class are categorized as active while in the control class they are quite active. The cognitive learning outcomes of the experimental and control class students after being analyzed using the t-test were obtained for the tcount of (1.73) the value was smaller than the value of ttable (2,000). Based on these results it can be seen that there is no effect of the integration of the think pair share learning model with make a match toward the cognitive learning outcomes of class X MA Raudlatusshibyan NW Belencong.
Perbedaan Kemampuan Analisis Mahasiswa Antara Pembelajaran Berbantuan Schoology dan Edmodo Pada Mata Kuliah Fisika Biologi
Authors: Dewantara Dewi
Published: January 2019

One of the subjects in the physics education program is Biological Physics. The learning outcome of the course is able to analyze variously integrated and applied physics in understanding biology and be able to apply it. However, the duration of the lecture is not sufficient to train maximum analytical skills in each chapter and every meeting. Efforts to overcome this are by applying online classes to support face-to-face lectures in class with assistance from e-learning in the form of Schoology and Edmodo. The purpose of this study is to describe whether or not there are differences in analytical skills between students who carry out learning with the help of Schoology and with Edmodo's assistance. This type of research is quasi-experiment with Non-equivalent Group Posttest-Only Design methods. Samples were students of Physics Education, Lambung Mangkurat University who attended the Biology Physics course 2017/2018. Data was collected through posttest from classes that use Schoology and classes that use Edmodo, which consists of 4 questions to determine analytical skills with matching, specifying, analyzing error indicators, and generalizing indicators. Based on the results of the study, obtained sig (2-tailed) value of 1.66> 0.05. Therefore, the results of this study indicate that there is no difference in the ability of analysis between classes that carry out Schoology-assisted learning and Edmodo-assisted learning. Thus, both Schoology and Edmodo can be used as an aid in learning to train and improve students' analytical skills.
Pengelolaan Pembelajaran IPA Ditinjau Dari Hakikat Sains Pada SMP Di Kabupaten Lombok Timur
Authors: Ali Lalu Usman
Published: January 2019

This study aimed to describe (1) the teachers understanding on the nature of science, (2) the application of the nature of science in teaching science, (3) the barriers ocoured during its implementation and (4) the solutions which was done to solve the learning problems. Designed as qualitative research, this closed to case study approach. This study in teaching learning process at the junior high school in SMP Negeri 1 Selong, SMP Negeri 1 Terara, and SMP Negeri 1 Masbagik. The data were collected trought observation, interview, questionnaires, and documentations. Triangulation is used to assess the credibility, truth, relevancy of the data and was done using Miles and Huberman intractive model of data analysis. The findings of the study showed (1) the teachers have low understanding about nature of science, (2) the teachers was seldom in applying the nature of science in learning process (25,0%), (3) the barriers found by the teachers was inapropriate of the subject materials with time managements, aspects of cognition oriented, students’ mental readiness and the teachers is not understanding of the nature of science, and (4) the teachers dominantly used discussion and speech methods than used inquiry methode in teaching learning process.
Pengaruh Model Pembelajaran Langsung Berbasis Praktikum Terhadap Keterampilan Proses Sains dan Kemampuan Berpikir Kritis Siswa
Authors: Royani Ida , Mirawati Baiq , Jannah Husnul
Published: January 2019

This study aims to determine the effect of practicum-based direct learning model on science process skills and students' critical thinking skills. This study is a quasi-experimental research with the Pretest-posttest Control Group Design. The sampling technique using Cluster Random Sampling. The sample in this study were students of class XI IPA 1 (18 students) as the experimental class and class XI IPA 2 (18 students) as the control class in AL-Hamzar High School Tembeng Putik. The research instruments used were learning implementation observation sheets, the science process skills observation sheets, and learning achievements tests. The data obtained were analyzed using the t test with the help of SPSS 16. The results of data analysis showed that the implementation of learning in the first meeting reached 81% and the second meeting 96% with a very good category. The students’ science process skills in both classes show that students' science process skills varies. The students’ critical thinking ability in the experimental class was higher than the control class. The results of pretest data analysis showed that students' critical thinking ability in the experimental class was 35.5 while the control class was 49.5. Students' critical thinking ability in post-test increased in the experimental class to 73.5 while the control class was 58.6. The results of the t-test show that tcount > ttable (3.45 > 2.04) so it can be concluded that the practicum-based direct learning model was affect toward students' science process skills and  critical thinking ability.
STRUCTURAL DESIGN OF POLYMER PROTECTIVE COATINGS FOR REINFORCED CONCRETE STRUCTURES. PART I: THEORETICAL CONSIDERATIONS
Authors: Kamaitis Zenonas
Published: January 2019

In a number of situations reinforced concrete structures must be protected by barrier materials to prevent contact with aggressive agents. One of the ways to protect concrete structures from corrosion is to use protective polymer coatings. Polymers as coating materials are not totally resistant and impermeable to all aggressive agents. Gases, vapors and liquids penetrate into a polymer so that the polymer mass swells and eventually disintegrates. However, the penetration/disintegration progresses at a much lower rate than that in the concrete. Surface coatings are able to reduce considerably the penetration, to slow down the rate of deterioration of concrete cover and to overcome most durability problems associated with external attack. In this article the mechanism of degradation of polymer coatings are analyzed. Methodology and predictive models for the degradation over time caused by aggressive actions of polymer coatings are presented. Proposed models can be applied to design of polymer coatings. Such a design of coatings is presented in a simple form for engineering design purposes.
NUMERICAL MODEL OF THREE‐DIMENSIONAL COUPLED WALL STRUCTURES
Authors: Miedziałowski Czesław , Chyży Tadeusz , Krętowska Joanna
Published: January 2019

Three‐dimensional description of a building structure taking into consideration the soil structure interaction is a very complex problem; the solution of it is often obtained by the finite‐element method. However, this method takes a significant amount of computational time and memory. Therefore an efficient computational model based on the subdivision of the structure into building elements such as wall and floor slab elements, plane and three‐dimensional joints and lintels, that could provide accurate results with a significantly reduced computational time, is proposed in this study for the analysis of three‐dimensional structures. The examples prove the efficiency and the computing possibilities of the model.
STRENGTH DEVELOPMENT OF CONCRETE WITH FLY ASH ADDITION
Authors: Kosior-Kazberuk Marta , Lelusz Małgorzata
Published: January 2019

Based on experimental results, mathematical models were elaborated to predict the development of compressive strength of concrete with fly ash replacement percentages up to 30 %. Strength of concrete with different types of cement (CEM I 42.5, CEM I 32.5, CEM III 32.5), after 2, 28, 90, 180 days of curing, have been analysed to evaluate the effect of addition content, the time of curing and the type of cement on the compressive strength changes. The adequacy of equations obtained was verified using statistical methods. The test results of selected properties of binders and hardened concrete with fly ash are also included. The analysis showed that concrete with fly ash is characterised by advantageous applicable qualities.
ON DESIGN FEATURES OF PROPPED AND UNPROPPED HYPERSTATIC STRUCTURES
Authors: Kudzys Algirdas , Kliukas Romualdas , Kudzys Antanas
Published: January 2019

An effect of structural and technological features on the design methodology of hyperstatic precast reinforced concrete and composite steel‐concrete structures is discussed. Permanent and variable service, snow and wind loads of buildings and their extreme values are analysed. Two loading cases of precast reinforced concrete and composite steel‐concrete continuous and sway frame beams as propped and unpropped members are considered. A redistribution of bending moments for the ultimate limit state of beams is investigated. A limit state verification of hyperstatic beams by the partial factor and probability‐based methods is presented. It is recommended to calculate a long‐term survival probability of beams by the analytical method of transformed conditional probabilities.
OPTIMISATION OF GEOMETRICALLY NON‐LINEAR ELASTIC‐PLASTIC STRUCTURES IN THE STATE PRIOR TO PLASTIC COLLAPSE
Authors: Karkauskas Romanas
Published: January 2019

A mathematical model and calculation algorithm for geometrically non‐linear structure cross‐sectional optimisation are developed. Inelastic strains in the state prior to plastic collapse are evaluated. The algorithm is obtained combining the extreme energy principle for minimum value dissipated power and mathematical programming theory in concert with a large displacement analysis. An evaluation of dissipative features by employing inelastic strains finally results in a significant reducement of structure carrying capacity resource versus accounting its elastic response only. The safety requirements of structure involve stability conditions in addition to the strength ones. Stability conditions define the minimum cross‐sectional and slenderness values of structural members. An evaluation of the above‐mentioned factors restrict a free development of plastic strains, thus an optimal structure generally is in a state prior to plastic failure. The problem is solved iteratively, as the employed values of structural elastic response are functionally related with the optimised parameters ones. During iterative calculus process the design parameters are defined applying the non‐linear analysis and the tangent stiffness computational procedures. A simulation of 16‐storey steel optimal frame created from standard profiles is presented.
MECHANICAL BEHAVIOUR OF TIMBER‐TO‐CONCRETE CONNECTIONS WITH INCLINED SCREWS
Authors: Kavaliauskas Saulius , Kvedaras Audronis Kazimieras , Valiūnas Balys
Published: January 2019

The purpose of this paper is to adopt the Johansen's yielding theory as a possibility to predict the ultimate load for timber‐to‐concrete joints using self‐tapping threaded connectors screwed at an angle into the wood. The ultimate load‐bearing capacity of a single connector is predicted to be when either the stresses in the wood reach the plastic failure stress level or when a combination of plastic failure in wood and dowel is attained. K. W. Johansen assumed that no axial tension occurred in the dowel and, thus no frictional contribution affected the lateral load‐bearing capacity. However, the joints with inclined fasteners are first affected by tension load, so the withdrawal capacity of the screws has to be taken into account. In order to determine the load bearing capacity for specific connector geometry, the kinematical possible failure modes are determined. The screw in the concrete part of connection was taken as rigidly embedded and thus no deformations appeared. The study showed that the load‐bearing capacity for connections with inclined high tensile strength screws can be predicted using the yielding theory, but this theory was unable to predict precisely the failure mode. Possible reasons for that include limited fastener ductility and influence of the screw inclination on the strength properties of timber.
Quasilinear Consequences of Turbulent Ion Heating by Magnetic Moment Breaking
Authors: Isenberg Philip A. , Vasquez Bernard J. , Hollweg Joseph V.
Published: January 2019

The fast solar wind emerging from coronal holes is likely heated and accelerated by the dissipation of magnetohydrodynamic turbulence, but the specific kinetic mechanism resulting in the perpendicular ion heating required by observations is not understood. A promising mechanism has been proposed by Chandran et al., which in this paper we call “magnetic moment breaking” (MMB). As currently formulated, MMB dissipation operates only on the ion perpendicular motion, and does not influence their parallel temperature. Thus, the MMB mechanism acting by itself produces coronal hole proton distributions that are unstable to the ion-cyclotron (IC) anisotropy instability. This quasilinear instability is expected to operate faster than the nonlinear turbulent cascade, scattering ions into the parallel direction and generating quasi-parallel-propagating IC waves. To investigate the consequences of this instability on the MMB-heated protons, we construct a homogeneous model for protons with coronal hole properties. Using a simplified version of the resonant cyclotron interaction, we heat the protons by the MMB process and instantaneously scatter them to lower anisotropy while self-consistently generating parallel-propagating IC waves. We present several illustrative cases, finding that the extreme anisotropies implied by the MMB mechanism are limited to reasonable values, but the distinctive shape of the proton distribution derived by Klein & Chandran is not maintained. We also find that these combined processes can result in somewhat higher particle energization than the MMB heating alone. These quasilinear consequences should follow from any kinetic mechanism that primarily increases the perpendicular ion temperature in a collisionless plasma.
The Spectral Content of SDO/AIA 1600 and 1700 Å Filters from Flare and Plage Observations
Authors: Simões Paulo J. A. , Reid Hamish A. S. , Milligan Ryan O. , Fletcher Lyndsay
Published: January 2019

The strong enhancement of the ultraviolet emission during solar flares is usually taken as an indication of plasma heating in the lower solar atmosphere caused by the deposition of the energy released during these events. Images taken with broadband ultraviolet filters by the Transition Region and Coronal Explorer and Atmospheric Imaging Assembly (AIA; 1600 and 1700 Å) have revealed the morphology and evolution of flare ribbons in great detail. However, the spectral content of these images is still largely unknown. Without knowledge of the spectral contribution to these UV filters, the use of these rich imaging data sets is severely limited. Aiming to solve this issue, we estimate the spectral contributions of the AIA UV flare and plage images using high-resolution spectra in the range 1300–1900 Å from the Skylab NRL SO82B spectrograph. We find that the flare excess emission in AIA 1600 Å is dominated by the C iv 1550 Å doublet (26%), Si i continua (20%), with smaller contributions from many other chromospheric lines such as C i 1561 and 1656 Å multiplets, He ii 1640 Å, and Si ii 1526 and 1533 Å. For the AIA 1700 Å band, the C i 1656 Å multiplet is the main contributor (38%), followed by He ii 1640 (17%), and accompanied by a multitude of other, weaker chromospheric lines, with minimal contribution from the continuum. Our results can be generalized to state that the AIA UV flare excess emission is of chromospheric origin, while plage emission is dominated by photospheric continuum emission in both channels.
L1 Stream Deflection and Ballistic Launching at the Disk Bow Shock: An Absorption-line Velocity Analysis in Semi-detached Binaries
Authors: Godon Patrick
Published: January 2019

Observations of semi-detached interacting binaries reveal orbital modulation in the optical, UV, and X-ray bands, indicating the presence of absorbing material obscuring the disk and accreting primary star at specific orbital phases consistent with L1 stream material overflowing the disk edge. We simulate the L1 stream interaction with the disk using tests particles within the context of the Roche model in the restricted three-body problem. At the disk bow shock the L1 stream particles are deflected and launched onto ballistic trajectories above the disk (as would normally occurs at the front of a detached shock in the hypersonic flow past a blunt body). At a given scale height, the material is assumed to continue without being affected by the disk, while at lower altitude it is being launched at an increasing elevation, as well as gradually being dragged by the Keplerian flow. Near the disk midplane (z ≪ H) the material is assumed to become part of the disk. We follow the stream material ballistic trajectories over the disk surface, where they reach a maximum height z/r at a binary phase Φ ∼ 0.75 and land on the disk at a smaller radius around phase Φ ∼ 0.5. The phase of the maximum height, the phase of the landing site, and the phase of the hot spot itself, all decrease significantly with decreasing radius. The radial velocity for each L1 stream ballistic trajectory along the line of sight (of the observer) to the hot inner parts of the disk is computed as a function of the orbital phase for a binary configuration matching the dwarf nova U Geminorum. The computed velocity amplitudes, phases, and pattern match the observed velocity offsets of the metal lines in the FUSE spectrum of U Gem during outburst. As ballistic trajectories are much easier to compute than realistic 3D hydrodynamical simulations, we propose the use of the L1 stream deflection and ballistic launching as a way to analyze the absorption-line orbital variability in semi-detached binaries and to assess or confirm, with some limitations, system parameters such as the mass ratio, inclination, and disk outer radius.
Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy–Galaxy and Galaxy–Mass Power Spectra
Authors: Yoon Mijin , James Jee M. , Anthony Tyson J. , Schmidt Samuel , Wittman David , Choi Ami
Published: January 2019

We present cosmological parameter measurements from the Deep Lens Survey (DLS) using galaxy–mass and galaxy–galaxy power spectra in the multipole range ℓ = 250–2000. We measure galaxy–galaxy power spectra from two lens bins centered at z ∼ 0.27 and 0.54 and galaxy–mass power spectra by cross-correlating the positions of galaxies in these two lens bins with galaxy shapes in two source bins centered at z ∼ 0.64 and 1.1. We marginalize over a baryonic feedback process using a single-parameter representation and a sum of neutrino masses, as well as photometric redshift and shear calibration systematic uncertainties. For a flat ΛCDM cosmology, we determine

, in good agreement with our previous DLS cosmic shear and the Planck cosmic microwave background (CMB) measurements. Without the baryonic feedback marginalization, S
8 decreases by

because the dark-matter-only power spectrum lacks the suppression at the highest ℓ values owing to active galactic nucleus (AGN) feedback. Together with the Planck CMB measurements, we constrain the baryonic feedback parameter to

, which suggests an interesting possibility that the actual AGN feedback might be stronger than the recipe used in the OverWhelmingly Large cosmological hydrodynamical Simulations. The interpretation is limited by the validity of the baryonic feedback simulation and the one-parameter representation of the effect.
Expected Imprints of the Carousel in Multi-frequency Pulsar Observations and New Evidence for Multi-altitude Emission
Authors: Maan Yogesh
Published: January 2019

Subpulse modulation has been regarded as one of the most insightful and intriguing aspects of pulsar radio emission. This phenomenon is generally explained by the presence of a carousel of sparks in the polar acceleration gap region that rotates around the magnetic axis due to the E × B drift. While there have been extensive single pulse studies, geometric signatures of the underlying carousel, or lack thereof, in simultaneous multi-frequency observations have remained largely unexplored. This work presents a theoretical account of such expected signatures, particularly that of a geometry induced phase-offset in subpulse modulation, including various formulae that can be readily applied to observations. A notable result is a method to resolve aliasing in the measured subpulse modulation period without relying on knowledge of the viewing geometry parameters. It is also shown in detail that the geometry induced phase-offset enables critical tests of various observed phenomena as well as proposed hypotheses, e.g., multi-altitude emission, magnetic field twisting, pseudo-nulls, etc., in addition to that of the carousel model itself. Finally, a detailed analysis of a 327 MHz pulse sequence of PSR B1237+25 is presented as a case study to test the single frequency multi-altitude emission scenario. The analysis provides firm evidence of the inner and outer conal components of this pulsar to have originated from the same carousel of sub-beams and emitted at different heights.
Density and Mass Distribution of Spiral Galaxy NGC 3198
Authors: Daod Nazzeha A. , Zeki Mohammed K.
Published: January 2019

The density and mass of the spiral galaxy NGC 3198 have been studied as functions of the distance from the center of galaxy depending on its observed rotation curve. Calculation of density and mass at different radii of the galaxy NGC 3198 show that the central inner density ρ1(r) at r < r
t (r
t is the turn-off radius) is found to be constant ρ1 = 0.387 M
o pc−3, while the density ρ2(r) of the outer region r > r
t is much less than the inner region, which varies from 0.0187 M
o pc−3 at r = 4 kpc to 0.00278 M
o pc−3 at r = 30 kpc. On the other hand, the inner mass m1(r) at r < r
t grows from 1.33 × 109
M
o at r = 0.1 kpc to a mass of 8.539 × 109
M
o at r = 4 kpc, while the outer mass m2(r) at r ≥ r
t changes from 8.539 × 109
M
o at the turn-off radius r
t to 5.262 × 1010
M
o at r = 30 kpc of the galaxy. Finally, the behavior of the calculated density and mass is consistent with other works.
A new species of Polyonyx (Crustacea, Anomura, Porcellanidae) inhabiting polychaete-worm tubes (Annelida, Chaetopteridae) in the Indo-West Pacific
Authors: Werding Bernd , Hiller Alexandra
Published: January 2019

Polyonyxsocialissp. n.from the South China Sea of Vietnam is described. The new species was collected in a previous study that compared the vertebrate and invertebrate symbiont communities living in the tubes of two syntopic species of the polychaete genusChaetopterus.Polyonyxsocialissp. n.inhabits the tubes of the smaller polychaete species as a heterosexual pair, and frequently shares the cavity of the host’s tube with a larger porcellanid,P.heok, also present as a male-female pair, and with a species of trinchesiid nudibranch. Less frequently, the new species shares its host with a heterosexual pair of a larger species of pinnotherid crab.Polyonyxsocialissp. n.belongs to theP.sinensisgroup, a world-wide distributed morphological line within the heterogeneous genusPolyonyx. Most species in this group are obligate commensals of chaetopterid polychaetes. The crabs have a transversally cylindrical habitus, which enables them to move laterally along the worm tubes with ease.Polyonyxsocialissp. n.is a relatively small species that lives attached to the inner walls of the polychaete tube. The small size and flattened chelipeds and walking legs of the new species confers it an advantage to cohabiting the same worm tube with larger decapod species occupying most of the tube’s cavity.
Epidemiologic Profile of Erectile Dysfunction in Patients with Systemic Lupus Erythematosus: The Latin American Landscape
Authors: Merayo-Chalico Javier , Barrera-Vargas Ana , Morales-Padilla Sandra , la Garza Roberto Reyna-De , Vázquez-Rodríguez Ricardo , Campos-Guzmán Jonathan , Alcocer-Varela Jorge , Sotomayor Mariano , Abud-Mendoza Carlos , Martínez-Martínez Marco , Colunga-Pedraza Iris , Uriarte-Hernández Christian , Acosta-Hernández Roberto , Fajardo Daniel , García-García Conrado , Padilla-Ortíz Diana , Gómez-Martín Diana
Published: January 2019

Objective.

The aim of this study was to describe the prevalence of erectile dysfunction (ED), as well as associated demographic and clinical features, in men with systemic lupus erythematosus (SLE), by means of a systematic, standardized evaluation.

Methods.

We performed a transversal study in 8 tertiary care centers in Latin America. We included male patients ≥ 16 years who fulfilled ≥ 4 American College of Rheumatology criteria for SLE and had regular sexual activity, and evaluated them with the International Index of Erectile Function-5 questionnaire. Relevant demographic, clinical, and serological characteristics were recorded. We included 2 control groups: the first was made up of healthy men and the second of men with autoimmune diseases other than SLE (non-SLE group).

Results.

We included 590 subjects (174 SLE, 55 non-SLE, and 361 healthy controls). The prevalence of ED in the SLE group was 69%. Mean age in that group was 36.3 ± 1.03 years. Among SLE patients with and without ED, these factors were significantly different: the presence of persistent lymphopenia (p = 0.006), prednisone dose (9.3 ± 1.2 vs 5.3 ± 1.3 mg, p = 0.026), and the Systemic Lupus International Collaborating Clinics damage score (1.25 ± 0.14 vs 0.8 ± 0.16 points, p = 0.042). Independent risk factors for ED in patients with SLE were persistent lymphopenia (OR 2.79, 95% CI 1.37–5.70, p = 0.001) and corticosteroid use in the previous year (OR 2.15, 95% CI 1.37–3.37, p = 0.001).

Conclusion.

Regardless of comorbidities, treatment (excluding steroids), and type of disease activity, patients with SLE have a high prevalence of ED, especially considering that most patients are young. Recent corticosteroid use and persistent lymphopenia, which could be related to endothelial dysfunction, are risk factors for this complication in men with SLE.
Osteopontin and Disease Activity in Patients with Recent-onset Systemic Lupus Erythematosus: Results from the SLICC Inception Cohort
Authors: Wirestam Lina , Enocsson Helena , Skogh Thomas , Padyukov Leonid , Jönsen Andreas , Urowitz Murray B. , Gladman Dafna D. , Romero-Diaz Juanita , Bae Sang-Cheol , Fortin Paul R. , Sanchez-Guerrero Jorge , Clarke Ann E. , Bernatsky Sasha , Gordon Caroline , Hanly John G. , Wallace Daniel , Isenberg David A. , Rahman Anisur , Merrill Joan , Ginzler Ellen , Alarcón Graciela S. , Chatham W. Winn , Petri Michelle , Khamashta Munther , Aranow Cynthia , Mackay Meggan , Dooley Mary Anne , Manzi Susan , Ramsey-Goldman Rosalind , Nived Ola , Steinsson Kristjan , Zoma Asad , Ruiz-Irastorza Guillermo , Lim Sam , Kalunian Ken , Inanc Murat , van Vollenhoven Ronald , Ramos-Casals Manuel , Kamen Diane L. , Jacobsen Søren , Peschken Christine , Askanase Anca , Stoll Thomas , Bruce Ian N. , Wetterö Jonas , Sjöwall Christopher
Published: January 2019

Objective.

In cross-sectional studies, elevated osteopontin (OPN) levels have been proposed to reflect, and/or precede, progressive organ damage and disease severity in systemic lupus erythematosus (SLE). We aimed, in a cohort of patients with recent-onset SLE, to determine whether raised serum OPN levels precede damage and/or are associated with disease activity or certain disease phenotypes.

Methods.

We included 344 patients from the Systemic Lupus International Collaborating Clinics (SLICC) Inception Cohort who had 5 years of followup data available. All patients fulfilled the 1997 American College of Rheumatology (ACR) criteria. Baseline sera from patients and from age- and sex-matched population-based controls were analyzed for OPN using ELISA. Disease activity and damage were assessed at each annual followup visit using the SLE Disease Activity Index 2000 (SLEDAI-2K) and the SLICC/ACR damage index (SDI), respectively.

Results.

Compared to controls, baseline OPN was raised 4-fold in SLE cases (p < 0.0001). After relevant adjustments in a binary logistic regression model, OPN levels failed to significantly predict global damage accrual defined as SDI ≥ 1 at 5 years. However, baseline OPN correlated with SLEDAI-2K at enrollment into the cohort (r = 0.27, p < 0.0001), and patients with high disease activity (SLEDAI-2K ≥ 5) had raised serum OPN (p < 0.0001). In addition, higher OPN levels were found in patients with persistent disease activity (p = 0.0006), in cases with renal involvement (p < 0.0001) and impaired estimated glomerular filtration rate (p = 0.01).

Conclusion.

The performance of OPN to predict development of organ damage was not impressive. However, OPN associated significantly with lupus nephritis and with raised disease activity at enrollment, as well as over time.
Standardizing Terminology and Assessment for Orofacial Conditions in Juvenile Idiopathic Arthritis: International, Multidisciplinary Consensus-based Recommendations
Authors: Stoustrup Peter , Resnick Cory M. , Pedersen Thomas Klit , Abramowicz Shelly , Michelotti Ambra , Küseler Annelise , Verna Carlalberta , Kellenberger Christian J. , Nordal Ellen Berit , Caserta Giuliana , Jankovska Iveta , Halbig Josefine Mareile , Kristensen Kasper Dahl , Arvidsson Linda Z. , Spiegel Lynn , Stoll Mathew L. , Lerman Melissa , Glerup Mia , Defabianis Patrizia , Frid Paula , Alstergren Per , Cron Randy Q. , Ringold Sarah , Nørholt Sven Erik , Peltomäki Timo , Herlin Troels , Peacock Zachary S. , Twilt Marinka ,   the TMJ Juvenile Arthritis Working Group
Published: January 2019

Objective.

To propose multidisciplinary, consensus-based, standardization of operational terminology and method of assessment for temporomandibular joint (TMJ) involvement in juvenile idiopathic arthritis (JIA).

Methods.

Using a sequential expert group–defined terminology and methods-of-assessment approach by (1) establishment of task force, (2) item generation, (3) working group consensus, (4) external expert content validity testing, and (5) multidisciplinary group of experts final Delphi survey consensus.

Results.

Seven standardized operational terms were defined: TMJ arthritis, TMJ involvement, TMJ arthritis management, dentofacial deformity, TMJ deformity, TMJ symptoms, and TMJ dysfunction.

Conclusion.

Definition of 7 operational standardized terms provides an optimal platform for communication across healthcare providers involved in JIA-TMJ arthritis management.
Opioid Use in Patients with Ankylosing Spondylitis Is Common in the United States: Outcomes of a Retrospective Cohort Study
Authors: Sloan Victor S. , Sheahan Anna , Stark Jeffrey L. , Suruki Robert Y.
Published: January 2019

Objective.

To assess the prevalence of chronic opioid use in patients with ankylosing spondylitis (AS), and to compare the characteristics of patients with and without chronic opioid use.

Methods.

This was a retrospective cohort study of patients with AS identified in the Truven Health MarketScan Research database between January 1, 2012, and March 31, 2017. Commercial and Medicaid claims data were examined using both specific (720.0 and M45.x) and broader (720.x and M45.x) International Classification of Diseases (ICD) coding definitions. Patients were aged ≥ 18 years on the date of first qualifying ICD code occurrence (the index date). Demographics and clinical characteristics were assessed in the 12-month period preceding the index date. The 12-month followup period was used to assess prevalence and characteristics of chronic opioid use.

Results.

Chronic opioid use was common among patients with commercial claims (23.5% of ICD 720.0 patients; 27.3% of ICD 720.x patients), and especially those with Medicaid claims (57.1% and 76.7%, respectively). The proportion of patients with claims for anti–tumor necrosis factor therapies during followup was often low, and for Medicaid patients was lower among those with chronic opioid use (29.6% of ICD 720.0 patients; 2.3% of ICD 720.x patients) than those without (47.1% and 7.1%, respectively). Among chronic opioid users in all cohorts, the cumulative supply of opioids was typically high (≥ 270 days in the followup period); most opioids prescribed were Schedule II.

Conclusion.

Patients with AS receive opioids with disturbing frequency. The infrequent prescription of recommended therapies to these patients reflects a need to optimize treatment further through education of patients and healthcare professionals alike.