bluuebunny/crossref_metadata_2025 huggingface dataset:
Jackson Lake Archeological Project, A Summary
Authors: Connor Melissa
Published: July 2020

The 1987 field season of the Jackson Lake Archeological Project was part of an ongoing project sponsored by the Bureau of Reclamation in conjunction with the repair of the Jackson Lake dam. The field seasons of 1984 and 1985 were spent inventorying the area exposed by the drawdown of the reservoir. This constituted the area around the lake between the elevations of 6772 feet and 6745 feet above sea level (Connor 1985, 1986). The field season of 1986 was spent testing sites which appeared promising (Connor 1987). In 1987, major excavations were undertaken at sites 48TE509 and 48TE1067. This was a very dry year and the reservoir dropped to the pre-reservoir lake levels. Additional inventory in this area recorded 40 new sites. In total, the Jackson Lake Archeological Project has inventoried about 8550 acres and recorded 109 archeological sites that were flooded by the reservoir. During 1987, a co-operative agreement between the Service and the University of Wyoming allowed a team from the Department of Anthropology to complete backhoe excavations in conjunction with the Jackson Lake Archeological Project. The Jackson Lake Archeological Project is guided by six broad research themes (NPS 1987, 1988). These consist of (1) the effect of inundation on archeological resources, (2) refinement of the paleoenvironmental sequence, (3) culture history and culture Chronology, (4) definition of the aboriginal settlement and/or transhumance pattern, (5) definition of subsistence patterns, and (6) the extent of trade.
Field Metabolic Rats in Microtine Rodents
Authors: Negus Norman , Berger Patricia , Pinter Aelita
Published: July 2020

Microtus montanus populations manifest large scale periodic fluctuations in density. Populations of Microtus longicaudus inhabiting the same environment do not exhibit such fluctuations. This study seeks to compare the energetic requirements of the two species at different seasons and among the cohorts that are born successively during the breeding season. From these data we expect to gain a better understanding of the adaptive physiological responses of both species to their environment.
Pathogenic Naegleria from Thermal Springs
Authors: O'Dell William , Scanlan Pamela , Ramaley Robert
Published: July 2020

The long range goal of this research is to document the occurrence of pathogenic amoebae in thermal habitats that have been altered or disturbed by human activity. Immediate goals for this year included the comparison of filtration with centrifugation as a means of concentration of amoebae in water samples and testing the feasibility of using a comerercially available enzyme detection system (API ZYM) for the identification of pathogenic Naegleria.
Climatic Factors, Reproductive Success and Population Dynamics in the Montane Vole, Microtus montanus
Authors: Pinter Aelita
Published: July 2020

Multiannual fluctuations in population density of small rodents have been known since antiquity. However, factors responsible for this phenomenon remain unknown (Krebs and Myers 1974, Finerty 1980, Taitt and Krebs 1985). The objectives of this long-term study are to determine whether environmental variables, possibly acting through reproductive responses, contribute to the multiannual fluctuations of the montane vole, Microtus montanus.
Hydrologic Study of Jewel Cave/Wind Cave
Authors: Alexander, Jr. E. , Davis Marsha
Published: July 2020

The hydrologic study at Wind and Jewel Caves has the following Objectives: 1) to evaluate the water distribution within these two park areas; 2) to determine the effects of human impact upon the natural hydrologic system; 3) to document any detrimental effects to the water quality; 4) to document any instances in which the cave environment is adversely affected by the quality or quantity of the water present; and 5) to suggest options to change present water use practices, if necessary.
Vegetation Distribution in Badlands National Park
Authors: Hoffman George
Published: July 2020

This study concerns the vegetation distribution in habitat types of Badlands National Park, South Dakota. Phase I of the study is that of reconnaissance and determining potential habitat types present. Phase II includes intensive sampling of sites which represent minimally disturbed vegetation. Sites on more disturbed vegetation also will be established. Phase III will include mapping of habitat types and additional sampling to fully substantiate results of Phase II. Study sites established in the Park should be thought of as long-term monitoring sites at which effects of animal grazing, climate changes and fire can affect the vegetation.
Fire History in the Bighorn Canyon National Recreation Area
Authors: Knight Dennis , Wu Yegang
Published: July 2020

Research was initiated in May, 1988, to determine fire history in the coniferous forests and adjacent foothill vegetation located on East Pryor Mountain in the Bighorn Canyon National Recreation Area (BCNRA). The results, anticipated in 1990, will be useful for the development of a fire management plan.
Elk Movements, Habitat use, and Population Dynamics in Theodore Roosevelt National Park
Authors: Irby Lynn , Marlow Clayton , Picton Harold , Westfall Jerry
Published: July 2020

Objectives: 1. Description of daily and seasonal movements of elk (Cervus elaphus); 2. Identification of seasonally important habitat types and physiographic character of areas used for feeding, cover, mating, and calving; 3. Identification of damage to Park resources or property of adjoining landowners by elk; 4. Description of interactions between elk and other ungulates and identification of interactions that could detrimentally affect specific ungulate species; 5. Determination of human impacts on elk behavior and distribution in the Park; and 6. Description of elk age structure, productivity, and survivorship during 1987-88 and development of population goals that are consistent with Park management goals.
Summary of Research Activities within the National Park Service Areas Cooperating with the U.W.-N.P.S. Research Center, 1987
Authors: National Park Service Research Center University of Wyoming
Published: July 2020

This section contains a summary of research activities within the National Park Service areas cooperating with the U.W.-N.P.S. Research Center, 1987 including Badlands National Park, Big Hole National Battlefield, Bighorn Canyon National Recreation Area, Bryce Canyon National Park, Arches National Park, Canyonlands National Park, Natural Bridges National Monument, Capitol Reef National Park, Custer Battlefield National Monument, Dinosaur National Park, Fort Laramie National Historic Site, Glacier National Park, Glen Canyon National Recreation Area, Grand Teton National Park, Grant-Kohns Ranch National Historic Site, Jewel Cave National Monument, Knife River Indian Villages National Historic Site, Theodore Roosevelt National Park, Wind Cave National Park, Yellowstone National Park and Zion National Park.
Inventory of Plant Species of Special Concern and the General Flora of Dinosaur National Monument
Authors: Kuntz David , Naumann Tamara
Published: July 2020

Field surveys during the third year (1989) of a botanical inventory of Dinosaur National Monument (DINO) concentrated in Lodore Canyon and selected areas in the Utah portion of the monument. Inventory efforts focused on areas not represented in historical collection records and in habitats known or suspected of supporting populations of rare and/or endemic plant taxa. The museum research component of the study was continued for a second year.
An Analysis of Potential Sensitive Plant Species for Long-Term Monitoring in Glacier National Park
Authors: Maurer Brian
Published: July 2020

To date, we have accomplished several objectives. First, we met with Kim Keating at Glacier National Park last October to work out specific guidelines for submission of the data on plant species that we were gathering from the literature. Although no firm format for the database was decided upon, we did decide what kinds of information to begin collecting. This information included: name, common name and taxonomic status of the species, geographic range and origin, preferred habitat, life cycle, reproduction mode, etc.
The Evaluation of Developing Shoreline Communities and Potential for Natural Vegetation in Glen Canyon National Recreation Area, Arizona-Utah
Authors: Waring Gwendolyn
Published: July 2020

The study of the riparian plant community along the shoreline of Lake Powell offers a unique opportunity to observe the development of a plant community from a very early stage. This annual report discusses some of the results of the initial phase of this study, which was designed to describe the structure of the plant community as it occurs today and to describe preliminary results of experiments begun to assess interactions between the exotic tamarisk and native riparian plant species.
Influence of Habitat Fragmentation on Spotted owl Site Selection, Site Occupancy, and Reproductive Status in Western Oregon
Authors: Meyer Joseph , Irwin Larry , Boyce Mark
Published: July 2020

Currently there is little empirical evidence to guide decision makers on how to manage for viable populations of the Northern Spotted Owl (Strix occidentalis caurina) and how to decide what extent and what types of timber harvesting do not adversely affect Spotted Owls. In this ongoing study we are addressing some of the urgent research needs related to Spotted Owls by testing the null hypotheses that various forms of forest fragmentation do not affect (1) site selection, (2) site occupancy, or (3) reproductive success of Spotted Owls at sites within the Bureau of Land Management (BLM) checkerboard pattern of land ownership and management in Western Oregon.
Fire History and Potential Fire Behavior in a Rocky Mountain Foothill Landscape
Authors: Wu Yegang , Knight Dennis
Published: July 2020

A landscape approach was used to study fire history and fire behavior in the Douglas-fir forests and foothill vegetation of the Bighorn Canyon National Recreation Area in southcentral Montana. The 3,976 ha study area was divided into 4-ha grid cells, and traditional fire scar analysis and fuel sampling methods were used for data collection in each cell. There have been 15 surface fires during the last 109 years and 10 canopy fires during the last 360 years. The mean fire interval in the forests as a whole, was 7 years for surface fires and 31 years for canopy fires. Using the Weibull function, the recurrent time for fire in a specific grid cell was 212 and 226 years for surface and canopy fires, respectively. The distribution of the probability density function showed that there was a peak of high canopy fire frequency between 150-250 years of stand age. There was no obvious peak period for surface fires in humid ravines, which suggests that surface fires there are not associated with aging. Employing Rothermel's model, a fire behavior model (FIREMDL) was developed and linked it to a geographic information system (GRASS) to simulate flammability of each grid cell under different conditions of fuel moisture and wind velocity. The results suggest that flammability is highly variable because of differences in vegetation and topographic position.
Distribution and Significance of Mesozoic Vertebrate Trace Fossils in Dinosaur National Monument
Authors: Lockley Martin , Fleming R. , Conrad Kelly
Published: July 2020

Dinosaur National Monument (DINO) encompasses an area that has rocks with a high potential for preservation of vertebrate trace fossils, especially dinosaur tracks. The purpose of this research is to document the presence, type, and distribution of vertebrate trace fossils in Mesozoic rocks exposed in DINO. These rocks include the Moenkopi Formation, Chinle/Popo Agie Formation, Glen Canyon Sandstone, Carmel Formation, Entrada Sandstone, Morrison Formation, Cedar Mountain Formation, Dakota Formation, and Frontier Formation. This study will increase our knowledge of the stratigraphic and geographic distribution of vertebrate tracks as well as provide taxonomic, behavioral, and paleoenvironmental data. During the 1990 field season, reconnaissance of the western part of DINO revealed the presence of vertebrate trace fossils in the Chinle/Popo Agie Formation. In addition, our examination of the Moenkopi Formation suggests that vertebrate tracks are probably present in this unit. Locality information was also obtained for probable track-sites in the Carmel Formation, Entrada Sandstone, and Morrison Formation.
Sedimentology and Stratigraphy of the Morrison Formation in Dinasuar National Monumant
Authors: Turner Christine , Peterson Fred
Published: July 2020

The objective of this study is to establish a stratigraphic, sedimentologic, and geochronologic framework of the Upper Jurassic Morrison Formation within Dinosaur National Monument, and to tie this framework to the rest of the Colorado Plateau and other important fossil-bearing localities. The study is designed to complement ongoing paleontological inventories of the Morrison Formation within the Monument. During the first field season, emphasis was placed on beginning detailed stratigraphic and sedimentologic work and the collection of samples for various types of analyses.
Changes in Geomorphic Processes in the Snake River Following Impoundment of Jackson Lake and Potential Changes Due to 1988 Fires in the Watershed
Authors: Marston Richard
Published: July 2020

Rivers are dynamic features of the landscape whose characteristics vary over time and space with changes in environmental controls. The Snake River in Grand Teton and Yellowstone National Parks has responded to the impoundment of Jackson Lake and subsequent changes in the operation of Jackson Dam. The 1988 fires in the Snake River watershed may also affect channel morphology. Whether a new system equilibrium might be attained and the extent to which the effects of past events might persist in the fluvial landscape, are two critical questions that need to be addressed for the Snake River. The stability of the Snake River, in turn, will affect the quantity and quality of riparian and aquatic habitats judged to be critical to fish and wildlife in the parks. Stream channel dynamics of the Snake River in Grand Teton National Park are also intimately tied to issues of floodplain delineation and management, the aesthetic value of rivers, and the quality of recreational float trips.
An Evalution of Earthquake Hazards of the Grand Teton National Park Emphasizing the Teton Fault
Authors: Smith Robert , Byrd John , Bruhn Ronald , Susong David , Sylvester Arthur , Geissman John
Published: July 2020

The Teton fault is a major, range-front normal fault that bounds the east side of the ~70 km-long Teton Range, located in northwestern Wyoming. It is an integral component of the 1,300 km-long Intermountain Seismic Belt, an active zone of intraplate seismicity that extends from southern Utah, northward through western Wyoming, eastern Idaho and western Montana. Geologically the Teton fault has evolved in the last 7 to 9 million years accumulating 6 to 9 km of displacement, concomitant with the development of the Basin-Range extensional tectonics in western Wyoming. In the past 5 to 8 million years, the nearby Yellowstone hotspot has likely influenced the activity of the fault including the timing and amount of slip on the fault. Quaternary scarps of the Teton fault extend for ~55 km, north-south along the east side of the Teton Range and provide excellent exposures of the Teton fault. The Teton fault is the primary structure responsible for producing more than 2,100 m (7,000 ft) of vertical topographic relief of the range front and is the single most important factor contribution to the spectacular topography and scenery of the Teton Range - hence to the essence of the Grand Teton National Park.
Test of Natural Potential Method in Locating Cave Passageways of Jewel Cave
Authors: Lange Arthur
Published: July 2020

Ever increasing pressures on our natural environment necessitate measures to detect and ameliorate problems of contamination, construction and overuse, before they become critical. This is particularly the case in our national parks and monuments where the tide of visitors is continually growing. the underground resource of natural caverns is especially vulnerable to damage, due to its fragile features, rare and delicate biota, open communication with groundwater, and its invisibility beneath the ground surface. It is important that we be able to recognize the existence of a cavern system prior to the planning of roads and facilities that may encroach upon or introduce waste and hazardous materials into the underground system.
The Impact of External Development on the Economic and Aesthetic Values of Theodore Roosevelt National Park
Authors: Wallace George , Reed Pat , McKean John
Published: July 2020

Theodore Roosevelt National Park (TRNP), the only national park and wilderness in the United States, to represent a "mixed grass prairie ecosystem, has considerable external development near its boundaries. Park managers have wanted to know to what extent such development was affecting park values and the visitor's experience. They also wanted a better estimate of the park's contribution to the local and state economy so that changes in visitation might be viewed in economic terms. Additional information about visitor perceptions, preferences, and characteristics was also requested.
Pulse duration and environmental effects on the surface nanostructuring and mechanical properties of zinc during femtosecond laser irradiation
Authors: Bashir Shazia , Rafique Muhammad Shahid , Nathala Chandra Sekher , Ajami Ali Asghar , Husinsky Wolfgang , Whitmore K.
Published: July 2020

This paper reports on the effect of both the pulse duration and environments on the surface morphology, ablated area, ablation rate, and mechanical properties of a femtosecond laser irradiated zinc (Zn) in air and ethanol. The targets were exposed to 1000 succeeding pulses of Ti:sapphire laser (800 nm) at a fluence of

2.5

J

c
m

−
2

with various pulse durations ranging from 30 to 550 fs. The surface structures have been characterized by a field emission scanning electron microscope, whereas the ablation rate has been measured using confocal and optical microscopy. The mechanical behavior of irradiated targets has been explored by using a microhardness tester. It is observed that in the case of Zn ablation in air, a crater with nonuniform surface morphology along with formation of both micro- and nanoscale droplets rims, organized laser-induced periodic surfaces are observed, whereas in the case of ablation in ethanol, nano- and microscale scale droplets, pores, cones, agglomerates, and channels are formed. The growth and the shape of these structures are strongly dependent on the pulse durations and environments. The hardness of laser-treated samples is found to be higher as compared to untreated ones and is also found higher for liquid-assisted ablated Zn as compared to air-assisted ablated targets due to an increased chemical reactivity in an ethanol-confined environment. The decreasing trend of hardness with increasing pulse duration for both environments is observed, which is attributed to decreasing trend in both shock pressure and ablation pressure with increasing pulse duration.
Two-dimensional silicon nanoring array enabled polarization-independent narrow spectral linewidth optical filter
Authors: Chen Cheng , Wu Yu , He Rong , Zhang Rongjun , Chen Liangyao , Guo Junpeng
Published: July 2020

In this paper, we investigate a new, to the best of our knowledge, type of guided-mode resonance optical filter with polarization-independence at normal incidence and relatively narrow spectral linewidth in the near-infrared regime. The new optical spectral filter consists of a 2D array of silicon nanorings on silicon film on silica substrate. Using finite difference time domain (FDTD) simulations, it is found that the spectral linewidth of the optical filter is primarily controlled by nanoring width and is tolerant to the variations of the size and height of silicon nanorings. FDTD simulations also reveal that the excited guided mode is more tightly confined in the nanoring structures with smaller ring widths. It is explained that the narrow spectral linewidth of the nanoring structure filter is due to the smaller scattering cross-section of the silicon nanorings and tighter confinement of the guided mode. Our optimally designed optical reflection filter exhibits a 2.4 nm spectral linewidth with nearly 100% peak reflectance at the resonance wavelength.
Photoinduced tunable birefringence and dichroism in silver nanogratings
Authors: Talebi Razieh , Taheri Ghahfarokhi Forough , Vashaee Daryoosh
Published: July 2020

Silver nanogratings are anisotropic plasmonic nanostructures with
potential application in optical components due to their large
birefringence and dichroism. We induced linear birefringence and
linear dichroism in subwavelength Ag-AgCl films by irradiating with a
single low-power linearly polarized laser beam. The laser beam aligns
silver nanoparticles in the direction of laser polarization and forms
nanograting. We used Stokes parameters to determine linear
birefringence and linear dichroism in silver aligned nanostructures.
The values of linear dichroism and linear birefringence in silver
nanogratings are controllable through manipulating the spatial period
of nanogratings. The dispersion characteristic of dichroism and
birefringence is also investigated.
Power scaling of dispersive-wave generation in higher-order optical fiber modes
Authors: Lægsgaard Jesper
Published: July 2020

Dispersive-wave generation in higher-order

HE

1
l

modes of step-index optical fibers is studied numerically. The limits to power scaling from nonlinear intermodal couplings are investigated. It is shown that single-mode operation is possible up to power levels of a few MW, whereas both pump and dispersive-wave power distributes over several modes for higher powers, making the frequency conversion process less specific and efficient. The use of a circularly polarized pump is found to be beneficial for power scaling, both due to a reduced effective nonlinearity, and a reduction in intermodal couplings to

LP

2
l

-like modes.
Gain-nonlinearity-induced tunable phonon sideband spectrum and frequency comb
Authors: Zhang Mengqin , Zheng Anshou , Zhang Guangyong
Published: July 2020

We propose a scheme for generation of the high-order phonon sideband spectra (HPS) and frequency comb arising from the strain-induced coupling of a nitrogen-vacancy (NV) impurity to a resonant vibrational mode of a diamond nanoresonator. The underlying nonlinear process of the nanomechanical system, due to the coupling between the NV center and an additional pump laser in a phonon nanoresonator, results in the formation of efficient HPS and the frequency comb. Using a perturbation method, we give an explicit analytical expression for second-order phonon sideband generation. Our numerical simulations show that the HPS and frequency comb exhibit ultralow power consumption and good tunability of phonon sideband-line spacing, number, and intensity in a wide parameter range. The sideband-line spacing is determined entirely by the beating frequency between the two input lasers and is as low as a few megahertz. Of particular interest is that the symmetry of the phonon frequency comb can be controlled by adjusting some parameters. Our approach based on a solid system with good integration and expansibility may be useful for the construction of phonon networks.
Measurements of the nonlinear refractive index of AgGaSe2, GaSe, and ZnSe at 10  µm: erratum
Authors: Pigeon J. J. , Matteo D. A. , Tochitsky S. Ya. , Ben-Zvi I. , Joshi C.
Published: July 2020

Typographical errors in our recently published paper [J. Opt. Soc. Am. B
37, 2076 (2020)JOBPDE0740-322410.1364/JOSAB.395844] are
corrected.
Deep learning based projector defocus compensation in single-pixel imaging
Authors: Rizvi Saad , Cao Jie , Hao Qun
Published: July 2020

Fourier single-pixel imaging (FSI) uses a digital projector to illuminate the target with Fourier basis patterns, and captures the back-scattered light with a photodetector to reconstruct a high-quality target image. Like other single-pixel imaging (SPI) schemes, FSI requires the projector to be focused on the target for best performance. In case the projector lens is defocused, the projected patterns are blurred and their interaction with the target produces a low-quality image. To address this problem, we propose a fast, adaptive, and highly-scalable deep learning (DL) approach for projector defocus compensation in FSI. Specifically, we employ a deep convolutional neural network (DCNN), which learns to offset the effects of projector defocusing through training on a large image set reconstructed with varying defocus parameters. The model is further trained on experimental data to make it robust against system bias. Experimental results demonstrate the efficacy of our method in reconstructing high-quality images at high projector defocusing. Comparative results indicate the superiority of our method over conventional FSI and existing projector defocus rectification method. The proposed work can also be extended to other SPI methods influenced by projector defocusing, and open avenues for applying DL to correct optical anomalies in SPI.
Cryogenic electro-optic polarisation conversion in titanium in-diffused lithium niobate waveguides
Authors: Thiele Frederik , vom Bruch Felix , Quiring Victor , Ricken Raimund , Herrmann Harald , Eigner Christof , Silberhorn Christine , Bartley Tim J.
Published: July 2020

Many technologies in quantum photonics require cryogenic conditions to operate. However, the underlying platform behind active components such as switches, modulators and phase shifters must be compatible with these operating conditions. To address this, we demonstrate an electro-optic polarisation converter for 1550 nm light at 0.8 K in titanium in-diffused lithium niobate waveguides. To do so, we exploit the electro-optic properties of lithium niobate to convert between orthogonal polarisation modes with a fiber-to-fiber transmission >43%. We achieve a modulation depth of 23.6±3.3 dB and a conversion voltage-length product of 28.8 V cm. This enables the combination of cryogenic photonics and active components on a single integration platform.
Carving out configurable ultrafast pulses from a continuous wave source via the optical Kerr effect
Authors: Fenwick Kate L. , England Duncan G. , Bustard Philip J. , Fraser James M. , Sussman Benjamin J.
Published: July 2020

Wavelength-tunable, time-locked pairs of ultrafast pulses are crucial in modern-day time-resolved measurements. We demonstrate a simple means of generating configurable optical pulse sequences: sub-picosecond pulses are carved out from a continuous wave laser via pump-induced optical Kerr switching in 10 cm of a commercial single-mode fiber. By introducing dispersion to the pump, the near transform-limited switched pulse duration is tuned between 305–570 fs. Two- and four-pulse signal trains are also generated by adding birefringent α-BBO plates in the pump beam. These results highlight an ultrafast light source with intrinsic timing stability and pulse-to-pulse phase coherence, where pulse generation could be adapted to wavelengths ranging from ultraviolet to infrared.
Sub-kHz linewidth, hybrid III-V/silicon wavelength-tunable laser diode operating at the application-rich 1647-1690 nm
Authors: Brian Sia Jia Xu , Li Xiang , Wang Wanjun , Qiao Zhongliang , Guo Xin , Zhou Jin , Littlejohns Callum G. , Liu Chongyang , Reed Graham T. , Wang Hong
Published: July 2020

The wavelength region about of 1650 nm enables pervasive applications. Some instances include methane spectroscopy, free-space/fiber communications, LIDAR, gas sensing (i.e. C2H2, C2H4, C3H8), surgery and medical diagnostics. In this work, through the hybrid integration between an III-V optical amplifier and an extended, low-loss wavelength tunable silicon Vernier cavity, we report for the first time, a III-V/silicon hybrid wavelength-tunable laser covering the application-rich wavelength region of 1647-1690 nm. Room-temperature continuous wave operation is achieved with an output power of up to 31.1 mW, corresponding to a maximum side-mode suppression ratio of 46.01 dB. The laser is ultra-coherent, with an estimated linewidth of 0.7 kHz, characterized by integrating a 35 km-long recirculating fiber loop into the delayed self-heterodyne interferometer setup. The laser linewidth is amongst the lowest in hybrid/heterogeneous III-V/silicon lasers.
All-optical fiber filter based on an FBG inscribed in a silica/silicone composite fiber
Authors: Zeng Yilong , Serandi Gunawardena Dinusha , Zhou Bin , Liu Zhengyong , Tam Hwa-Yaw
Published: July 2020

An all-optical tunable filter based on a fiber Bragg grating (FBG) inscribed in a self-heated silica/silicone composite fiber is demonstrated. A thin silicone film is coated inside the suspended core fiber), which acts as the silicone cladding. A periodic refractive index modulation is inscribed in the silicone cladding by UV irradiation. Silicone is an organic material whose optical properties are different than silica, which leads to interesting applications. The high thermo-optic properties are studied and applied here. A 1550 nm pump laser is utilized to heat the silicone grating where a wavelength shift is observed for the gratings when subjected to different pump powers. Experimental results indicate a wavelength tuning coefficient of

−

0.128

n
m

/

m
W

with a response time of 0.5 s to obtain a wavelength shift of 1 nm under periodic pump light. The new design of this miniature all-optical filter is cost-effective and can potentially be adhered in optical fiber sensing and communication systems.
A new model for state-of-the-art leadership education with performance as a driving factor for future viability
Authors: Faix Werner G. , Windisch Liane , Kisgen Stefanie , Paradowski Laurentia , Unger Felix , Bergmann Wilfried , Tippelt Rudolf
Published: July 2020

The challenges of today’s rapidly changing environment are tremendous. Almost every organization has new tasks; some must even completely modify their objectives, strategy, business focus, or business model. In addition to the necessity of managing processes as effectively and efficiently as possible, the topic of leadership has gained increasing importance. Thus, training and development programs aimed at preparing future generations of leaders have long been well frequented. However, current leadership education fails to meet the demands of either the present or the future, as our analysis shows. For this article, we have thoroughly researched current leadership education programs and comprehensively studied the pertinent literature. Based on this, we recommend goals, content, and methods for a state-of-the-art leadership education program. Our main findings demonstrate that leadership education should focus on (1) the development of competencies and their demonstrated performance, (2) personal development, and (3) the implementation of real-world projects as a form of inquiry-based learning. Furthermore, we precisely describe an evidence-based approach for an innovative study program: the newly developed ‘Diploma of Performance and Leadership’ (DPL). We end by giving an outlook on the program’s implementation, which will be accompanied by empirical evaluation.
Martínez, M., Zamorano, A. (coords.) (2018). Teoría y metodología para la enseñanza de ELE. Editorial En Clave-ELE: España
Authors: Amador Solano María Gabriela
Published: July 2020

La reseña de este libro dedicado a la enseñanza de ELE ofrece a sus lectores una secuencia de temas que integran los cuatro volúmenes. Después de una lectura reflexiva de este texto se puede afirmar que el docente interesado en este campo, encontrará en sus páginas ideas nuevas, conceptos que le permitirán pensar, explicar y discutir con sus colegas y con sus alumnos el origen de sus dificultades en todo proceso de adquisición de una lengua. También nos ayuda a tomar decisiones en la planificación de objetivos o en la incorporación de cursos en la malla curricular de los programas de formación docente. Queda claro que tanto el Marco Común Europeo de Referencia para el Aprendizaje, la Enseñanza y la Evaluación de las Lenguas (MCER) como el Plan Curricular del Instituto Cervantes (PCIC) son una fuente de principios y un estado de arte sobre el tema. Una obra como esta es recomendada al cien por cien para ponerse al día y hacerse preguntas desafiantes sobre el proceso que estamos empleando en nuestros centros de enseñanza.
Una herramienta TIC para la redacción del Trabajo de Fin de Grado (TFG)
Authors: Da Cunha Iria
Published: July 2020

Desde la implantación del Espacio Europeo de Educación Superior a través del Plan Bolonia, en la universidad española es obligatorio que los estudiantes elaboren un Trabajo de Fin de Grado (TFG). El objetivo del presente trabajo es desarrollar una herramienta TIC (Tecnologías de la Información y la Comunicación) para ayudar a los estudiantes en la redacción del TFG en español. La herramienta tiene forma de editor de textos en línea e integra recursos de Procesamiento del Lenguaje Natural (PLN), como un analizador morfológico y un segmentador discursivo. Está dividida en tres módulos, que ayudan al estudiante a: 1) estructurar el TFG, 2) darle formato y corregirlo ortográficamente, y 3) revisar la adecuación del texto, mediante recomendaciones lingüísticas específicas para este género textual, relacionadas, por ejemplo, con oraciones largas, siglas, definiciones o unidades léxicas subjetivas. La evaluación user-driven realizada con estudiantes universitarios ofrece resultados positivos del uso de la herramienta.
Valoraciones de futuros profesores de español hacia las variedades cultas de su lengua. Datos de Granada
Authors: Manjón-Cabeza Cruz Antonio
Published: July 2020

Tras la aplicación de la encuesta de PRECAVES XXI, comprobamos que los futuros profesores de español granadinos muestran un grado de identificación de las variedades que oscila entre la buena identificación (variedades rioplatense, castellana y andaluza), media identificación (canaria, caribeña, mexicana y andina) y mala identificación (chilena). Constatamos la tendencia a establecer jerarquías entre variedades, en este caso a favor de la castellana. Asimismo, las valoraciones directas nos señalan que la variedad castellana tiene un tratamiento especial frente a las demás, porque tiene la mejor consideración cognitiva (es considerada urbana y clara), pero tiene la peor consideración afectiva porque se considera lejana, fea y aburrida. Las valoraciones indirectas de la variedad andaluza reflejan un fuerte grado de estigmatización, especialmente en la valoración socioeconómica. También hay una variedad americana mal valorada: la andina. Suponemos que se refleja una reacción discriminatoria hacia comunidades inmigrantes de ese origen.
El estudio de los discursos alimentarios desde una perspectiva crítica
Authors: Rodríguez Barcia Susana
Published: July 2020

La alimentación, por su condición esencial como parte indisociable de la naturaleza humana, constituye una de las temáticas más relevantes para la población mundial y, por ello, se conforma como un objeto de estudio fundamental desde los ámbitos económico, antropológico, médico y, por supuesto, discursivo. Este último interesa especialmente en cuanto que las sociedades contemporáneas se caracterizan por la información excedente y normalizada sobre la alimentación que se vehicula a través de las publicaciones científicas y divulgativas. Este contexto propicia el interés que, fundamentealmente desde el año 2000, despierta el estudio de los discursos alimentarios dentro del ámbito del análisis del discurso con perspectiva crítica, pues los discursos de la alimentación resultan determinantes en la conformación del ethos de la nueva figura de consumidores y consumidoras. En este artículo se resumen las principales investigaciones que vinculan ideología y discurso alimentario realizadas en clave principalmente lingüística, más allá de los estudios de comunicación y marketing. Se conforma así como un estado de la cuestión y una reflexión teórica de utilidad para afrontar el abordaje de investigaciones lingüísticas y críticas de los discursos alimentarios.
Venezuela en etapa de colapso macroeconómico: un análisis histórico y comparativo
Authors: Puente Camba José Manuel , Rodríguez Jesús Adrián
Published: July 2020

Para el 2018, se había perdido el 49,32 % del PIB total de Venezuela en tan solo cinco años (2014-2018). Realizando un análisis histórico y comparativo con el paquete econométrico Stata, se evidencia que esta evolución agregada del PIB representa el peor desempeño macroeconómico en magnitud y duración en la historia de Venezuela (1950-2018), el peor de América Latina y el segundo peor en el mundo en el periodo 1980-2018
Iskolai bántalmazás a diákok perspektívájából
Authors: Siegler Anna
Published: July 2020

A kortársak zaklatása gyakori jelenség az iskolai évek során, hosszú távú nehézségeket okozva a csoport perifériájára szorult diákok és az egész osztályközösség számára. A probléma rendszerszemléletű megközelítése a figyelem fókuszába helyezi az egész közösséget, a szemlélőket passzív helyett aktív ágensként kezeli, és a zaklató-áldozat hatalmi dinamikáját megerősítő vagy hátráltató erőként vizsgálja. Jelen kutatás a diákok mentalizációjának vizsgálatára fókuszált iskolai bántalmazásról szóló narratíváikon keresztül. Három magyarországi iskola (Budapest, Martfű és Barcs) összesen 138 kilencedikes diákjának válaszai kerültek elemzésre. Az eszközök között szerepelt Ken Rigby Iskolai Zaklatás Kérdőíve, illetve egy iskolai bántalmazásról szóló történet felidézését szolgáló instrukció. A kapott eredmények alapján elmondható, hogy az osztályközösség tagjai eltérő mértékben tulajdonítanak mentális állapotokat társaiknak attól függően, hogy milyen szerepben észlelik magukat a bullying dinamikájában.
COVID-19 AND RACIAL ISSUES: HOW THIS DISEASE HAS GENERATED REPERCUSSIONS IN AFRICAN AMERICANS
Authors: Rolim Neto Modesto Leite , Nobre Camila Bezerra , Silva Anne Karoline Avelino , Cruz Camila Morais , Figueiredo Mabel Maria Sousa , Landim Taís Maia
Published: July 2020

Abstract: Black people represent only 13% of the US population, however they represent 30% of deaths caused by Covid-19. Many discrepancies like these are the result of structural inequalities that make black communities in the country more susceptible to contagion and more likely to develop severe forms of Covid-19, the disease caused by the new coronavirus. It is evident therefore, that as with any other social problem, the impacts caused by the new coronavirus are even more destructive in socially segregated niches. The crises in the health system and the economy that humanity has been through have opened up differences and intensely victimized the most vulnerable populations. African-Americans, the poor and individuals with low schooling are the people who suffer a potentially overwhelming effect, caused, to a great extent, by historical structural prejudice and by the stereotypes historically constructed by society. Keywords: Covid-19; Racial issues; Social differences.
Nilai Kerukunan Umat Beragama dalam Tradisi Merti Bumi Tunggularum Kabupaten Sleman
Authors: Rosidin Rosidin
Published: July 2020

Indonesia is known for its variety of tradition. The ritual of Merti Bumi Tunggularum is among the important traditions which has not been explored in studies. This study explores the origin of Merti Bumi tradition, especially related to the community values of religious harmony. This study employs a qualitative-descriptive approach. The results of this study highlight that: (1) The tradition of Merti Bumi Tunggularum is referred to the respected figure of Kyai Tunggul Wulung, in which his death is commemorated through the ritual of annual Haul held in the community in the month of Sapar 21st. This annual haul has been developed into various traditions, including the Carnival of the Merti Bumi and some other related ceremonies. (2) The ritual of Merti Bumi reflects community’s value of religious harmony as it involves tolerance, equality and mutual cooperation among people from various religious backgrounds in the society.[Indonesia dikenal dengan keragaman tradisinya. Ritual Merti Bumi Tunggularum adalah salah satu tradisi berharga yang belum dieksplorasi dalam studi ilmiah. Penelitian ini menelusuri awal mula tradisi Merti Bumi, terutama yang beekenaan dengan nilai-nilai kerukunan umat beragama. Penelitian ini menggunakan pendekatan kualitatif-deskriptif. Hasil dari penelitian ini mengemukakan bahwa: (1) Tradisi Merti Bumi Tunggularum merunut pada tokoh Kyai Tunggul Wulung yang sangat dihormati, yang kematiannya diperingati melalui ritual Haul tahunan yang diadakan pada bulan Sapar ke 21. Peringatan ini telah dikembangkan menjadi berbagai tradisi, termasuk upacara Merti Bumi dan upacara lainnya yang berkaitan. (2) Ritual Merti Bumi mencerminkan nilai kerukunan beragama masyarakat karena memegang teguh toleransi, kesetaraan, dan gotong royong timbal balik pada semua lapisan masyarakat dengan berbagai latar belakang agama yang berbeda-beda.]
A imagem que faz sintoma: Sobre o método naturalista de Cláudio Assis
Authors: Leites Bruno
Published: July 2020

Neste artigo, investigo enunciados proferidos e imagens produzidas por Cláudio Assis, buscando compreender a concepção que o cineasta faz a respeito do seu próprio cinema e do espectador que visa atingir. A conjugação de Assis entre a necessidade de desconfortar e a de satisfazer o espectador indicam que o cineasta compreende a imagem como uma materialidade que deve provocar experiências de sintoma em coletividade.
A memória enquanto ato teórico dos 'making of' documentários
Authors: De Oliveira Iuva Patricia
Published: July 2020

Este artigo discute a dimensão da memória nos processos de criação cinematográficos através dos making ofs documentários, compreendendo-os enquanto índices de pensamento teórico e criativo, cujos vestígios temporais reverberam e disseminam sentidos de uma memória do (e para o) cinema, ultrapassando o texto fílmico ao qual se refere. Admitimos o making of como processo e obra, donde a memória desponta enquanto um ato teórico no ambiente de criação cinematográfica possível de desvelamento. O percurso teórico-metodológico revela uma breve explanação acerca dos conceitos de memória e dialética do olhar para, num segundo momento, conjugar determinados aspectos com as noções de imagem crítica e dupla distância, a partir de Didi-Huberman (2010). A reflexão sobre os agenciamentos da memória audiovisual nos making ofs documentários se dá através do seguinte corpus: Burden of Dreams (de 1982, direção de Les Blank) e The Hamster Factor and Other Tales of Twelve Monkeys (de 1996, direção de Keith Fulton e Louis Peppe).
O ator experimental no cinema: mimese-jogo nas fronteiras da re-presentação
Authors: De Oliveira Sandro
Published: July 2020

Este trabalho propõe articular as manifestações do ator experimental no cinema com o conceito de ‘má mimese’ do pensamento Platónico, tomando para análise uma leva de obras cinematográficas modernas, de movimentos espraiados nos anos de 1960-70 e situados fora do que se convencionou classificar de ‘arte cinematográfica clássica’. O ator experimental nega os primados da mimese como representação em três momentos definidos pelo pensamento Platónico: falsidade do símile; vacuidade da aparência; e incompletude do signo.
O corpo que resta: Energia negativa no cinema de Pedro Costa
Authors: Brandão Pinto Eduardo
Published: July 2020

O cinema de Pedro Costa é atravessado pelas figuras humanas, como Vanda Duarte e Ventura, que emergem em uma tensão entre corpo, olhar e imagem. Neste ensaio, reconhecemos a aparição dessas corporeidades, sempre sob um permanente status nascendi a destituir a implantação de um estatuto que as identifique como personagens ou sujeitos. Para isso, discutimos a carnalidade como aquilo que é tramado por energias negativas a instituírem uma forma de subjetividade sem sujeitos. Buscando homologias entre imagem cinematográfica e filosofia – em conexão com o pensamento do filósofo brasileiro Vladimir Safatle – reconhecemos o negativo como categoria estética central, com que se produz uma imagem proletária, altamente magnetizada por um poder de revolta.
O lado político das fábulas do 'western'
Authors: Carreiro Rodrigo
Published: July 2020

Recensão do recém-lançado livro "Sergio Leone: Cinema as Political Fable"(Christian Uva), que integra um movimento de revalorização crítica do diretor italiano, prestando especial atenção como ideias políticas complexas, e muitas vezes ambivalentes, se infiltravam em filmes que pareciam, à primeira vista, mero entretenimento apolítico.
Tecendo os misteriosos fios da cinefilia
Authors: Natálio Carlos Eduardo
Published: July 2020

"Mysteries of Cinema" (2018) é uma obra que compila mais de três decadas de produção ensaística de Adrian Martin. Nesta recensão procura encontrar-se um fio condutor - metodológico e de análise - que atravessa muitos dos textos aqui presentes, na sua variedade e relação com o mistério da cinefilia.
A periferia reimaginada: Uma conversa com Affonso Uchôa
Authors: Maria Leite Chiaretti  , Araújo Mateus
Published: July 2020

Conversa com o cineasta Affonso Uchôa sobre seu itinerário artístico, suas estratégias de produção e alguns aspectos de sua obra: relação com as pessoas filmadas, importância da palavra, necessidade da imaginação, experiência da periferia, seus padrões de sociabilidade, a violência cotidiana, a amizade como comprensação para a ausência de família.
O tempo confinado: A partir da exposição "Time Machine : Cinematic Temporalities"
Authors: Yung Mariano Raphaël
Published: July 2020

Trata-se de uma análise da exposição Time Machine : Cinematic Temporalities no contexto do confinamento. Esta situação singular oferece uma outra relação com o espaço e o tempo. A partir da exposição, o texto é uma reflexão pessoal sobre o tempo.
ANALISIS YURIDIS DASAR PERTIMBANGAN KEBIJAKAN LOCKDOWN PADA SITUASI DARURAT KESEHATAN DI TINGKAT DAERAH
Authors: Kusumaputra Ardhiwinda , Retnowati Endang
Published: July 2020

Indonesia merupakan negara yang memberlakukan hak otonomi di daerah. Melalui adanya Undang-Undang Nomor 23 Tahun 2014 tentang Pemerintahan Daerah, diatur pembagian urusan antara Pemerintah Pusat dan Pemerintah Daerah. Namun, pengaturan atas pembagian urusan tersebut tidaklah selalu menjamin kepastian hukum, khususnya dalam menangani situasi darurat kesehatan, seperti wabah virus corona. Tidak menutup kemungkinan adanya konflik kewenangan yang terjadi berkaitan dengan penyusunan kebijakan, khususnya pada pembentukan kebijakan lockdown atas suatu daerah tertentu. Dalam penulisan ini akan dibahas: Pertama, apa yang menjadi dasar fundamental adanya kebijakan lockdown atas situasi darurat kesehatan? Kedua, apakah pemerintah daerah dapat menetapkan kebijakan lockdown atas situasi darurat kesehatan yang terjadi di daerah? Tulisan ini merekomendasikan perlunya konstruksi lebih lanjut terkait peran Pemerintah Daerah dalam hal tersebut.
PENEGAKAN HUKUM “ KEJAHATAN SEKS MAYANTARA” YANG DILAKUKAN OLEH ANAK DI INDONESIA
Authors: Astuti Laras , Purwanto Heri
Published: July 2020

Penyalahgunaan penggunaan internet banyak dilakukan oleh anak-anak terutama dalam aktivitas seksual. Kajian ini penting untuk dianalisis karena banyaknya anak-anak yang terjerat tidak hanya menjadi korban tetapi juga menjadi pelaku dalam aktivitas tersebut yang dikenal dengan kejahatan “seks mayantara”. Contoh dari kejahatan “seks mayantara” antara lain cyber pornografi, cyber prostitution, dan cyber sex. Penegakan hukum terhadap tindak pidana tersebut dapat dilihat melalui pendekatan terhadap undang-undang antara lain, KUHP, Undang-Undang ITE, dan Undang-Undang Anti Pornografi. Melalui pendekatan normatif ditemukan bahwa penegakan hukum tersebut dapat dilihat dari penerapan sanksinya yang disesuaikan dengan batas umur anak, tindak pidana yang dilakukan sebagaimana yang tertuang dalam Undang-Undang Sistem Peradilan Pidana Anak. Prosedur penyelesaian terhadap anak sebagai pelaku harus mengutamakan proses diversi sepanjang syarat diversi terpenuhi.