bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preliminary Shallow Seismic Reflection Survey of Crowley’s Ridge, Northeast Arkansas
Authors: VanArsdale Roy B. , Schweig Eugene S. , Kanter Lisa R. , Williams Robert A. , Shedlock Kaye M. , King Kenneth W. 
Published: July 2019

Abstract
Five high resolution seismic reflection lines (24 channel Mini-Sosie data with 1 s record length) were acquired across the margins of Crowley’s Ridge in northeast Arkansas during the summer of 1990 to test the hypothesis that Crowley’s Ridge is fault bounded. Three of the lines traversed the margins of the northern segment of the ridge near Jonesboro, Arkansas, and the other two were located south of Jonesboro across the margins of the southern segment. All five lines revealed subsurface faulting of the Paleozoic through Eocene (Wilcox) sections beneath the ridge margins. The data did not resolve the uppermost 0.1 s of two way travel time so it is not possible to determine if the Pliocene and younger sediments have been faulted. Thus, we can not determine if the ridge truly owes its topographic relief to fault displacement or if Tertiary faulting controlled subsequent Quaternary river incision. At one site, however, it does appear that the ridge margin is a fault scarp because the ridge height is the same as the structural relief on the ridge-bounding fault and fault displacement can be traced into the shallowest reflectors (0.15 s).
The Damage Potential of Eastern North American Earthquakes
Authors: Greig Glenn L. , Atkinson Gail M. 
Published: July 2019

Abstract
We compare the damage potential of three recent eastern North American (ENA) earthquakes (Nahanni, 1985; Saguenay, 1988; and Mont Laurier, 1990) to that of the 1989 Loma Prieta, California earthquake. The Saguenay and Mont Laurier events were noteworthy due to their unusually high stress drops. The comparisons are based on synthetic ground motion records generated by the stochastic method, using source and attenuation models that were derived from actual records for each event. Damage potential is characterized by inelastic strength demand spectra, obtained by analyzing the response of nonlinear oscillators to each record. There is a strong similarity between the inelastic spectra and the more familiar elastic response spectra, although some significant differences are observed. Comparisons between events show that a moderate high-stress ENA earthquake, like Saguenay, can be as damaging to high-frequency structures as a major California earthquake.
A Note on the Influence of Site Conditions on Ground Motion Values Observed for the Southeastern Illinois Earthquake of June 10, 1987
Authors: Zhang M. , Street R. , Harris J. , Drnevich V.P. 
Published: July 2019

Abstract
Site conditions (i.e., depth to bedrock and intermediate horizons within the soil column, and the shear wave velocities of-the soils and bedrock) have been investigated using and SH-wave velocity data at eight sites in Illinois and Indiana where the June 10, 1987, southeastern Illinois earthquake was recorded on blast monitors. The site effects have been calculated using the site conditions and the one dimensional response analysis program WAVES (Hart and Wilson, 1989), and it was found that the site conditions caused the peak particle accelerations to be amplified by a factor of 2.7 to 4.8. It is suggested that the records of ground motions obtained at sites not on rock be considered inadequate for usage at other sites unless accompanied by a quantitative description of the site conditions.
Did (Or Will) Fluid Injection Cause Earthquakes? - Criteria for a Rational Assessment
Authors: Davis Scott D. , Frohlich Cliff 
Published: July 2019

Abstract
Occasionally, the injection of fluids into deep wells causes or triggers earthquake activity. We propose two lists of yes-or-no questions to assess 1) whether an ongoing injection project has induced an earthquake that has already occurred; or 2) whether a proposed injection project is likely to induce a nearby earthquake. The answers to these questions form a descriptive profile of the injection project that facilitates comparison with other projects. To illustrate the application of these questions, we describe the answers in detail for the first set of questions at two sites: 1) the Rocky Mountain Arsenal near Denver, Colorado, where three significant earthquakes occurred in 1967; and 2) an injection site near Painesville, Ohio, near the epicenter of an earthquake that occurred 31 January, 1986. We also present a table of answers to these questions for several additional sites, and review other factors that may affect the potential for induced, seismic activity. The profiles of injection sites presented herein provide a convenient tool for deciding whether an injection site more closely resembles other sites where injection does, or does not induce earthquakes.
Attenuation of Multiphase Surface Waves in the Basin and Range Province Part II: The Fundamental Mode
Authors: Mitchell Brian J. , Xie Jai-kang , Lin Wen-jack 
Published: July 2019

Abstract
In order to investigate the large errors which sometimes characterize fundamental-mode attenuation coefficient determinations, we have made many such determinations in the Basin and Range province and have plotted particle motion for the observed three-component seismograms. Rayleigh wave attenuation coefficient values determined for four two-station paths across the Basin and Range province fluctuate between about −2.0 × 10−3km−1 and +3.0 × 10−3km−1 at periods between 6 and 33 s. Partide motion plots indicate that many of those determinations are contaminated by arrivals from non-great circle paths and from waves generated at heterogeneities along the path, factors which lead to systematic errors in the measured attenuation coefficient values. Attenuation coefficient determinations for the path MNV to ELK, which is within 20° of being normal to the structural trends of the Sierra Nevada and Great Valley, are, however, relatively free from such contamination. Mean values for that path decrease rapidly with period from about 3.0 × 10−3 to about 0.7 × 10−3km−1 between 6 and 10 s and then decrease slowly to about 0.3 × 10−3km−1 at 33 s. Standard deviations range between 0.2 × 10−3 and 0.3 × 10−3km−1 for most of the period range, but increase to about 0.4 × 10−3 at periods between 6 and 8 s. These results indicate that careful screening, based upon criteria such as three-dimensional particle motion, are necessary to obtain surface wave attenuation data of sufficient quality to use for inverting for crustal anelasticity in complex regions.
Earthquake Recurrence Rates in the Central Atlantic United States
Authors: Howell B.F. 
Published: July 2019

Abstract
The seaboard area from Rhode Island to Maryland has not experienced an earthquake larger than magnitude 5.1 since European settlement. The rate of occurrence of small earthquakes for the last 200 years suggests that the 500-year earthquake might be about magnitude 5.2. An earthquake comparable to the 1886 Charleston, S. C. earthquake (magnitude 6.7) has an average recurrence period calculated to exceed ten thousand years. The effect of variability in the seismic activity rate and possible incompleteness of the record of activity makes the accuracy of recurrence estimates for this region uncertain.
„Не казися, вітре..., Гуляй собі, небоже, ...” (концепт „вітер” у „малій прозі” Василя Ткачука)
Authors: Horniatko-Szumiłowicz Anna 
Published: July 2019

„Nie sierdźże się, wietrze…, hulaj sobie, niebożę, …” (kоncept „wiatr” w „małej prozie” Wasyla Tkaczuka)
Wiatr – to jeden ważnych obok słońca, księżyca, chmur, mrozu czy nieba konceptów wchodzących w skład konceptosfery Wasyla Tkaczuka – ukraińskiego nowelisty lat 30. XX w. Koncept wiatr funkcjonuje w systemie pozostałych konceptów, treści których zakodowane są w kulturowo-mentalnościowej przestrzeni narodu i jednocześnie w indywidualno-autorskim obrazie świata. Przeżycia bohaterów zharmonizowane są w najwyższym stopniu z elementami świata przyrody. Tak więc czytelnik paralelnie do działań bohaterów śledzi „poczynania” wiatru czy wspomnianych wyżej słońca, księżyca, chmur, mrozu, nieba. Zgłębienie jednego z ważnych konceptów w prozie Wasyla Tkaczuka jest tym bardziej zajmujące, iż mało znana spuścizna twórcza nowelisty wciąż czeka na należne jej miejsce w kanonie ukraińskiej literatury.
Thiol/disulphide homeostasis in Helicobacter pylori infected patients
Authors: Baykan Ahmed Ramiz , Biçer Cemile , Gerçeker Emre , Erel Özcan , Cerrah Serkan , Albayrak Bülent , Utlu Mustafa , Kargılı Ayşe 
Published: July 2019

Objectives:
The aim of the
study was to evaluate the oxidative stress level in patients, diagnosed with Helicobacter pylori infection, using a
novel marker (thiol/disulphide homeostasis) and to compare the level in infected
individuals with that in healthy volunteers. Methods: A total of 60 patients diagnosed with gastritis, erosive gastritis or ulcer by endoscopy were included and biopsied.
The 30 patients diagnosed with H. pylori and 30 healthy individuals were enrolled. Medical histories, physical examination results, body mass index (BMI), hemogram, free triiodothyronine (FT3), free thyroxine (FT4), thyroid stimulating
hormone (TSH), urea, creatinin, aspartate aminotransferase (AST), alanine
aminotransferase (ALT), albumin, total cholesterol, triglycerides, high density lipoprotein (HDL), low density lipoprotein) LDL and thiol/disulphide levels obtained in the study groups were
compared. Results: There was no significant difference between
the total thiol, native thiol,
disulphide/native thiol and dissulphide/total thiol ratios of the patient and
control group. When the H. pylori patients were stratified by
endoscopic evaluation as having mild (superficial gastritis or normal
appearance) or severe (ulcer or erosive areas)
symptoms, there were significant differences in disulphide, disulphide/native thiol, disulphide/total thiol and native thiol/total
thiol levels. We also observed BMI and the total, native thiol levels of H. pylori patients were inversely
related.( r: 0.562, p = 0.001; r: 0.0552,
p = 0.002).

Conclusions: Thiol/disulphide homeostasis is likely to differ with
both duration and severity of H. pylori
infection. Further investigations are needed to investigate the effect of H. pylori on oxidative stress.
El amor en la novela griega
Authors: Rojas Álvarez Lourdes 
Published: July 2019

La novela griega de amor y aventuras, mejor conocida como erótica, no tiene un patrón estructural fijo en relación con el tema amoroso, por lo que cada autor lo maneja de diversa manera. En este texto daré cuenta de las variantes en el manejo del tema amoroso, que va desde el flechazo amoroso que hace surgir este sentimiento de forma súbita, hasta un lento cortejo que lleva a conquistar al ser amado. Centraré mi análisis en las obras de Longo, Jenofontede Éfeso y Aquiles Tacio. De igual modo, con el afán de destacar la importancia del tema amoroso, voy a analizar algunas digresiones insertas en el desarrollo de la trama que lo abordan de manera tangencial. Me refiero a las emociones del hombre ante el amor: la mirada y el beso, y ciertas técnicas de conquista, incluido el amor homosexual, para finalizar con las situaciones en que se pone a prueba la castidad y fidelidad de los protagonistas. A partir del análisis realizado,podemos concluir que el eros pasional de los protagonistas se presenta como base de un lazo conyugal que es sometido a un sinnúmero de pruebas durante las cuales se transforma, desde la pasión arrasadora inicial, en algo estable y permanente, que se ofrece como un modelo a seguir para el público de la novela.
La jupiterización de los signa militaria: cambios simbólicos en la estructura socio-militar romana
Authors: Llantén Quiroz Nicolás Fernando , Penna Órdenes Nicolás Eduardo 
Published: July 2019

El presente artículo propone una nueva interpretación con respecto al simbolismo político-religioso de las enseñas militares romanas de fines del siglo II a. C. donde la eliminación de cuatro de sus cinco estandartes estaría vinculada estrechamente con las reformas para la profesionalización del ejército llevadas a cabo por Cayo Mario. En este caso la supervivencia del estandarte del águila iría en concordancia con la supremacía de Júpiter por encima de Marte, quien simbólicamente en su origen fue también un dios agrícola cuya fisonomía religiosa encarnaría el ideal de la dualidad de campesino-soldado que se buscó eliminar por el nuevo soldado profesional.
PEMBELAJARAN FLUIDA BERBASIS PROYEK UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KREATIF SISWA SMA
Authors: Simanjuntak Erniaty , Hakim Abdul , Qadar Riskan 
Published: July 2019

Abstract. The purpose of this study was to determine the project performance of students and improve the creative thinking skills of high school students after being taught project-based learning. The population in this study were all students of eleventh grade of State Senior High School 8 (SMAN 8) Samarinda in the academic year of 2018/2019. The samples taken were students of eleventh grade MIPA 1(n=36 students) and MIPA 2(n=36 students). This type of research was a quasi-experimental study with a nonequivalent control group design. Data collection is done by using observation and written test techniques. The results of the analysis with a Mann Whitney test showed that there’s a significant differences between students’ creative thinking skills of the experimental class which applied project-based learning and the control class which applied conventional learning with the p-value 0.00. Generally, students’ creative thinking skills increased with N-Gain 0.6, middle category. The results of research on project performance amounted to 86.2 which is categorized as an excellent category. Keywords: project based learning, creative thinking skills, project performance Abstrak. Penelitian ini bertujuan untuk mengetahui kinerja proyek siswa dan peningkatan keterampilan berpikir kreatif siswa SMA setelah diajarkan pembelajaran berbasis proyek. Populasi penelitian ini adalah seluruh siswa kelas XI SMA Negeri 8 Samarinda tahun ajaran 2018/2019. Sampel penelitian adalah siswa kelas XI MIPA 1(n = 36 Siswa) dan XI MIPA 2 (n=36 Siswa). Jenis penelitian ini adalah penelitian kuasi-eksperimen dengan rancangan nonequivalent control group. Pengumpulan data dilakukan dengan menggunakan teknik observasi dan tes tertulis. Hasil analisis melalui uji Mann Whitney menunjukkan terdapat perbedaan yang signifikan antara keterampilan berpikir kreatif siswa kelas eksperimen yang diterapkan pembelajaran berbasis proyek dengan kelas kontrol yang diterapkan pembelajaran konvesional dengan p-value 0,00. Rata-rata keterampilan berpikir kreatif siswa mengalami kenaikan dengan N-Gain 0,6; kategori sedang. Hasil penelitian kinerja proyek sebesar 86,2 yang termasuk dalam kategori sangat baik. Kata Kunci : project based learning, keterampilan berpikir kreatif, kinerja proyek
Model MPPT Metode Fractional Short Circuit Current Menggunakan JST - AG untuk Solar Panel
Authors: Wibisono Gunawan 
Published: July 2019

Sistem photovoltaic memerlukan sebuah metode untuk meningkatkan efisiensi konversinya. Salah satu metodenya adalah menggunakan maximum power point tracking (MPPT). Salah satu metode MPPT, adalah metode fractional short circuit current. Metode ini sediri dapat dioptimalkan lebih jauh menggunakan jaringan syaraf tiruan. Jaringan syaraf tiruan sendiri dapat dilatih menggunakan algoritma genetika. Dengan menggunakan algoritma genetika untuk melatih jaringan syaraf tiruan, didapatkan nilai mean square error (MSE) pelatihan berkisar antara 0,000690983- 0,003210547, dengan rata-rata sebesar 0,002499517. Sedangkan error pengujian berada pada rentang 8,91%-13,21%.
The Lower Cretaceous Atzompa Formation In South-Central Mexico: Record of Evolution From Extensional Backarc Basin Margin To Carbonate Platform
Authors: Sierra-Rojas María I. , Molina-Garza Roberto S. , Lawton Timothy F. 
Published: July 2019

Abstract: Lower Cretaceous depositional systems of southwestern Oaxaquia, in south-central Mexico, were influenced by initiation of a continental arc on mainland Mexico and subsequent accretion of the Guerrero composite arc terrane to mainland Mexico. The Atzompa Formation, defined herein, which crops out in the Sierra de Tentzo, constitutes a succession of conglomerate, sandstone, siltstone, and limestone with Early Cretaceous fauna and detrital zircon maximum depositional ages that range 126–123 Ma (late Barremian to early Aptian). The lower part of the Atzompa records a transition from alluvial to deep lacustrine depositional environments, suggesting the early stages of an extensional basin; overlying deposits of anabranching axial fluvial systems that flowed to the NE–SE accumulated after a period of rapid subsidence in the Tentzo basin, also formerly undescribed. Fluvial facies grade up-section to tidal deposits overlain in turn by a carbonate ramp succession that contains late Barremian to early Aptian fossils. The ramp deposits of the uppermost Atzompa Formation are overlain on a sharp contact by basinal carbonates of early Albian age.The Tentzo basin, formed due to crustal extension of the overriding plate in a backarc setting, was characterized by very high rates of sedimentation (3.6 mm/yr) during the early stages of basin formation (rift initiation and rift climax), and slower rates during the development of tidal systems and the carbonate ramp (post-rift stage). Regional and local subsidence took place in the backarc region of the Zicapa magmatic arc, which was established in the western margin of Mexico by Hauterivian time. Abrupt deepening following Atzompa Formation deposition is attributed to flexural subsidence related to collision of the Guerrero composite volcanic terrane with the western margin of Mexico. Following late Aptian accretion of the Guerrero terrane to Oaxaquia, the carbonate basin eventually shallowed to become a carbonate platform that faced the Gulf of Mexico.
Using Google Earth and Google Street View To Rate Rock Slope Hazards
Authors: Swanger William , Admassu Yonathan 
Published: July 2019

AbstractRockfall hazard from cut slopes along highways are caused primarily by unfavorable orientations of discontinuities, presence of unconsolidated cobble/boulder deposits, undercutting of strong rocks by weaker rocks, or degradation of weak rock masses. The rockfall hazard rating system (RHRS) was introduced in Oregon to evaluate the hazard and associated risk to an adjacent transportation facility for a cut slope's potential for releasing rockfalls. RHRS is a numerical score–based rating of parameters that characterize rockfalls. The parameters include slope geometry (height, angle, roughness, orientation), geologic information (discontinuity characterization, undercutting susceptibility), driver's line of sight, and climate. Geologic information, such as discontinuity orientation data, is traditionally collected using a transit compass and measuring tape at the site. The method is time consuming and expensive and can be dangerous. This study tests the use of Google Earth and Google Street View tools to remotely collect data for selected parameters that characterize rockfall hazard. The selected parameters are categorized under slope profile, geologic characteristics, and impact factor parameters, which are quantitatively and qualitatively measurable using Google Street View and Google Earth. A section of U.S. 33 with a high density of road cuts and two more sites along Interstate 64, all located in Virginia, were selected for the study. Sites were evaluated by using a combination of measurement tools available in Google Earth and a visual inspection of the rock units in Google Street View. The results of seven of the sites were re-evaluated using field-derived data.
Water-mortar Interaction in a Tunnel Located in Southern Calabria (southern Italy)
Authors: Vespasiano Giovanni , Notaro Pasqualino , Cianflone Giuseppe 
Published: July 2019

Abstract
In this work, we analyzed the results of a geochemical analysis aimed to define the origin of pH anomalies (pH > 11) in water samples collected inside a tunnel located in southern Calabria (southern Italy). We also analyzed the precipitates found close to the main drainage pipes. The hydrogeochemical study allowed us to identify a main NaOH water facies for the many samples collected close to the tunnel. In addition, the correlation diagrams highlighted high concentrations of Na, K, and Al, unrelated to simple water-rock interaction. Further evaluation excluded the possibility that interaction between the water and the outcropping lithologies was the only cause of the ongoing processes. This consideration is supported by the high Na and K concentrations, which cannot be accounted for by interaction between water and calcareous marl. Excluding a natural origin and some anthropogenic factors, one possible explanation is an interaction between the groundwater and the mortars used for consolidation during the excavation phase of the tunnel. Mortar and concrete degradation in aqueous environments produces a great increase in pH, initially deriving from interstitial fluids containing strong alkali (NaOH and KOH) and non-negligible K and Na concentrations, such as we observed in the collected samples.
Lidar Scanning of an Air-filled Cavern Accessed Through a Borehole
Authors: Maerz Norbert H. , Boyko Kenneth J. , Pendergrass Gary J. , Brown Justin W. 
Published: July 2019

Abstract
A development in a karstic area of southwest Missouri initiated a geophysical survey as part of an initial site investigation. After conducting an extensive geophysical survey over the proposed site, a significant anomaly was discovered. Subsequently drilling of a 0.15 m (6 in.) borehole into the anomaly intersected a void between 16.2 m (53 ft) and 28.7 m (94 ft) of depth. The property is at the top of the watershed, so both the borehole and the void were dry.
In order to model the stability of the cavern in response to the proposed development, it was necessary to determine both the size and the shape of the void.
Lateritic Soil Treated with Waste Wood Ash As Liner in Landfill Construction
Authors: Oluremi Johnson R. , Eberemu Adrian O. , Ijimdiya Stephen T. , Osinubi Kolawole J. 
Published: July 2019

ABSTRACTInherent variability in engineering properties of lateritic soil in relation to its plasticity, permeability, strength, workability, and natural moisture content, has made it an unpredictable material for use in civil engineering works, resulting in the need for its treatment by stabilization. A lateritic soil classified as A-6(6) and CL, according to American Association of State Highway and Transportation Officials and Unified Soil Classification System of ASTM (2011), was treated with up to 10 percent waste wood ash (WWA). Compaction was carried out using four energies, namely, reduced British Standard light, British Standard light (BSL), West African Standard, and British Standard heavy, on samples, which were then examined for hydraulic conductivity, volumetric shrinkage, and unconfined compressive strength as major criteria for use as liner and for the development of acceptable zones. Specimens with 4 percent WWA content compacted with a minimum BSL energy satisfied the maximum hydraulic conductivity (k) value of 1 × 10−9 m/s, maximum volumetric shrinkage strain of 4 percent, and minimum unconfined compressive strength value of 200 kN/m2 required for use as liner in engineered landfills. The overall acceptable zone was enlarged for up to 4 percent WWA content, thereby accommodating higher moulding water content, but the minimum compactive effort required to achieve it became reduced. The beneficial treatment of lateritic soil with up to 4 percent WWA will perform satisfactorily as liner and covers in waste containment application and will minimize the pollution and environmental impact of wood waste disposal.