bluuebunny/crossref_metadata_2025 huggingface dataset:
Aspects of the molluscan fauna of the rocky shores of the Firth of Forth and Forth estuary, Scotland
Authors: Berry A. J. , Smith Shelagh M.
Published: May 2019

Synopsis

Molluscan species diversity decreased westward from the North Sea into the Forth with decreasing diversity of habitats, decreasing algae and increasing turbidity of water. Species diversity varied little from year to year or seasonally at individual sites. Adult Littorina littorea in particular were larger at lower than at higher shore levels, and larger in the outer than the inner firth or estuary, while Nucella lapillus adults were of more uniform size throughout the area.

Population parameters and reproductive output of L. littorea and L. saxatilis in the estuary varied without strict relation to mere position between open firth and up-estuary sites. On the other hand, shells of L. saxatilis became progressively wider, breeding seasons of L. littorea were longer and less defined, breeding in L. saxatilis became more sharply seasonal and eggs of L. saxatilis had greater weight, calorific value and inorganic content at up-estuary sites. L. littoreashowed two-weekly peaks in spawning on spring tides while L. saxatilis showed monthly peaks in release of young near times of full moon.

Comparison of fresh material and stranded shells with material from beach deposits up to 5500′ years old indicates changes in populations with changes in climate about 550 BC. Size of Littorina spp. continued to decrease while numbers of Mytilus edulis increased greatly near the onset of the industrial revolution.
The role of heat pumps for the wise use of energy
Authors: Lopez-Cacicedo C. L.
Published: May 2019

Synopsis

Heat pumps allow the reuse of what might otherwise be waste heat by upgrading such energy to useful temperature levels. Industrial applications to evaporation, distillation and drying are briefly described, together with heat pumps' place within process integration, using examples from the Scottish distilling industries. It is shown that heat pumps are another tool available for energy use optimisation.
Synthesis, crystal structure, and vibrational studies of the monoclinically distorted double perovskite, Sr2Mn1−xNixTeO6 with (x = 0.25, 0.5, and 0.75)
Authors: Zaraq A. , Orayech B. , Igartua J. M. , El Bouari A.
Published: May 2019

The new double perovskite oxides Sr2Mn1−xNixTeO6 with x = 0.25, 0.5 and 0.75 have been synthesized in polycrystalline form by a conventional solid-state reactions process at 1180 °C, in the air. The structural and vibrational properties of these materials were studied by means XRPD, Raman, and IR spectroscopy. It has been proven that all the materials show typical double perovskite structures with a monoclinic symmetry, but with two different space group, P21/n for the compositions (x = 0.25 and 0.5), while the composition (x = 0.75) crystallizes in the space group I2/m. The lattice parameters obtained are in agreement with those of the two pure extremes Sr2MnTeO6 and Sr2NiTeO6. The monoclinic structural distortion involves long range ordering between Te6+ (in 2b site) and a random mixture (Mn2+/Ni2+) (in 2a site) for the two compositions (x = 0.25 and 0.5) that crystallize in P21/n. For the material (x = 0.75) with I2/m, similar distortion, ordering and mixing occur at the B and B’ double perovskite sites. It was observed that Vegard Law is satisfied, taking into account the cell parameters of both extremes. The effect of the partial substitution of Mn by Ni was also seen in Raman and IR data where a significant mode shift was observed with nickel content increase.
Comparison of the phosphorus status of soils managed organically and conventionally
Authors: Lengnick Laura L. , King Larry D.
Published: May 2019

Soils from adjoining farms, one managed organically and the other managed conventionally, were used in a greenhouse study to compare soil P status and the efficiency of concentrated superphosphate (CSP) and North Carolina rock phosphate (RP). Soil and plant parameters were measured as indicators of levels of soil P forms and availability of soil P to soybeans (Glycine max L.). Management did not affect dry matter yield of soybean plants. Conventional management resulted in higher P concentration in the plant and higher P uptake when CSP was the P source. However, when RP was the source, management effect was not significant. RP was only 15% as effective as CSP in increasing yield. When no P was applied, organic management resulted in greater total soil P, organic P, and Ca phosphate (CaP); conventional management resulted in greater Al and Fe phosphate (AlFeP) and occluded AlFeP (OcP). Addition of CSP increased AlFeP and OcP. Addition of RP increased CaP. CSP was more effective than RP in increasing extractable soil P. Multiple regression analysis showed that extractable P was related to AlFeP when CSP was the P source and to CaP when RP was the source. Yield was related to extractable P when CSP was the P source but when RP was the source, no significant regression models were found for yield.
Farmers' opinions about third-wave technologies
Authors: Lasley Paul , Bultena Gordon
Published: May 2019

This paper examines farmers' opinions about eight relatively new technologies. Data from a statewide sample of Iowa farmers provide the basis for examining the correlates of support for new technology. Evidence from a series of statewide surveys indicates that farmers are becoming concerned about environmental problems associated with conventional agricultural practices and are interested in alternative production systems. The data show that some new technologies are widely supported among farmers; in other cases farmers expressed considerable hesitancy or opposition to them. This paper draws on previous adoption research to examine the differential support of these technologies among farmers. From this earlier research two sets of variables, personal characteristics and farm characteristics, have been found to be important predictors of farmers' opinions about new technology. The analysis from new data shown here finds generally weak relationships between personal and farm characteristics with level of support for new technologies. Given the generally weak relationships between personal and farm characteristics and support for new technology, the paper argues that other factors need to be included in future research on the adoption of new technology.
Operating Cost Efficiency on Pennsylvania Dairy Farms
Authors: Grisley William , Mascarenhas Juan
Published: May 2019

Operating cost efficiency is evaluated on Pennsylvania dairy farms using a modification of the Farrell efficient unit isoquant frontier method. Evaluating farms by herd size groups, the average measure of cost efficiency ranged from 70 to 80 percent. Farms with larger herds were more homogeneous in efficiency than farms with smaller herds. Regression analysis was used to evaluate for differences in cost efficiency by herd size group.
A Linear Programming Analysis of Economies of Size and Profitability in Vegetable Production
Authors: Fueglein Hugo V. , Bravo-Ureta Boris E.
Published: May 2019

The declining importance of tobacco production in Connecticut and Massachusetts, the likely reduction in the acreage needed to support a shrinking dairy industry, and the growing concern with agricultural land preservation have brought about considerable interest in expanding vegetable production in Southern New England. Furthermore, the proximity to major metropolitan areas gives the cited region a major advantage in the production of vegetables for the fresh market (Swackhamer).
Justice and the Possibility of Good Moralism in Bioethics
Authors: HÄYRY MATTI
Published: May 2019

Moralism in bioethics and elsewhere means going beyond accepted moral principles, either by exaggerating good ethical concerns, by applying them to areas where they do not belong, or simply by assuming anything else than concrete physical or mental harm as normative guides. This paper explores the conceptual background of moralism especially in the consequentialist tradition, presents cases of allegedly bad moralism in the light of this exploration, introduces six approaches to justice, and argues that these approaches question our prevailing views on the goodness and badness of moralism in its various forms.
A Rationale For the Use of Microcomputers in Special Education
Authors: Williams Anne
Published: May 2019

Why should we use computers in our classroms in special education? Will they benefit our children? How can we use them to advantage? This paper presents reasons for using computers as effective teaching tools with children who are having difficulty in learning.
The Challenge of Survival
Authors: Fahey Morgan
Published: May 2019

There remains a challenge to improve worldwide, the medical response, and the ground safety response to the disaster of an aircraft crash. Statistically more survive all crashes than perish, and if an aircraft crashes with survivors, in most cases there will be more survivors than dead.

The challenge of survival is to ensure that if an aircraft does crash, the medical and rescue response to this disaster must be immediate, competent, technically skilled and adequately equipped to save the maximum number of lives possible, and to help preserve the quality of life for all who survive. Improving safety standards has been stimulated by the excellent work of the Flight Safety Foundation, the International Civil Aviation Organization (ICAO), the United States Air Line Pilots Association — in particular by Captain John Stefanski and by the World Association for Emergency and Disaster Medicine.

Many will recall that at the meeting of the Club of Mainz Association held in Monaco in 1979, a committee was appointed to investigate aircraft crash management at 100 international airports. The task of the Airport Disaster Workshop was to develop a model of emergency care for large and smaller airports, in order to produce a standard for the various groups of airports. The Club of Mainz Association has been concerned with the poor standard of medical response that has been shown at recent flight disasters. As a member of this consultant committee, it was obvious even from very early days of my research that the medical response to aircraft crash in some countries with high air traffic flows is incompetent, inadequate, and demonstrates little awareness of advances in resuscitation and on-site care of aircraft crash survivors.
Immediate Care for the Private Pilot
Authors: Baskett Peter J.F.
Published: May 2019

Private aviation being popular, there are many light planes in regular use. Several of these are operated by pilots in training through local flying clubs. There is naturally a risk every time a plane takes to the air, but the statistics show that the risk is actually quite small. Most insurance companies do not increase their premiums for private pilots flying for pleasure. The most common emergencies which arise in light aircraft are caused by deteriorating weather conditions, fuel shortage, engine failure or pilot error.

Accidents caused by the inept pilot usually occur during take-off or landing. Gusting wind conditions can produce an unexpectd stall position when there is inadequate height to recover. The strong vortices generated in the wake of high powered jet engines can turn over a light plane which is following too closely at take-off or landing in the circuit. Accidents may also occur during flight because of the pilot's failure to fly at the correct height on the correct course and communicate properly to the local air traffic control. Fear of being made to look incompetent often results in the inexperienced pilot failing to ask for help when he is in doubt or in trouble.

If problems such as engine failure or fuel starvation occur, however, all is not lost since, unlike their enormous commercial counterparts, light planes have excellent gliding characteristics and can usually make an emergency landing. Requiring only a relatively short landing run if full flaps are used, they can often find a suitable site free from buildings and people.
Triage 81
Authors: Mathews T.P.
Published: May 2019

In recent years a number of disasters have been handled less than perfectly. Large numbers of patients are sent to the medical facility with little or no warning. Hysterical relatives and friends also arrive, plus the media and curiosity seekers. Well-meaning volunteers and off-duty medical people begin to fill in where each individual thinks he or she fits in best. Soon the rooms and the corridors of the hospital are filled with people lying, standing and sitting. All sorts of treatments are attempted, orders for assistance go unanswered and general confusion reigns.

For many years the military have claimed leading roles in disaster care, giving and taking orders more readily than do most groups of medical civilians. It is the nature of their business to plan for disaster. They take the time to practice and may even be able to test their concepts during wartime.

Primary to all these plans is triage or sorting with “the object being to provide preferential treatment for those who could be attended readily and returned to battle, leaving aside those with more complex injuries until either they could be transported or time became available” (1).

Watt writes that in 1863 a Doctor Moyle tried to convince military sugeons to adopt a triage system to save lives: “Death, wounds, … limbs lacerated and torn off, wounds from muskets or splinters, bayonet wounds, all these appalling and horrible injuries have to be coped with in a few minutes…” He suggested a system of dividing casualties into three groups: slight, serious and fatal and argued that immediate live-saving surgery be done on the severely injured only if the slightly injured were deferred and the fatally injured put aside (2).
Aeromedical Transport of the Seriously Ill Patient
Authors: Mathews T.P.
Published: May 2019

Most of us are aware of the medical airlifts that were practiced by the United States Air Force during the Korean and Viet Nam conflicts. Likewise, we read regularly of the air transport of one or more severely burned patients from the scene of an accident to the Burn Center at Brooke Army Medical Center in San Antonio, Texas. But what is not generally known is the daily movement of patients who are armed forces members, or their dependents, throughout the world for the purpose of receiving sophisticated medical care, regardless of where they may be stationed.

The reasons for this service are two: first, quite obviously, it is humanitarian; second, it is a way for the Air Force to maintain medical readiness for their wartime mission by exercising this system on a daily basis during peacetime. We are talking about a worldwide network whose major and minor branches sweep around the globe.

Patients are air transported according to three levels of need: routine, high priority, and urgent. This article will be limited to a general description of the necessary hardware and current practices used for the urgent mission.

We use three types of aircraft: the Huey helicopter for short distances; the C-9, a two-engined jet, for medium range; and the C-141, a four-engined jet, for intercontinental transport. The medical modifications to the C-9 include a built-in ramp; a nurses' station similar to that found on a hospital ward, complete with built-in drug and equipment cabinets; multiple sources for oxygen and suction; and ready communication fore and aft. Seats can be quickly removed, leaving space for litters in tiers, infant isolettes and Stryker frames.
Emergency Care in Chemical Accidents
Authors: Okonek S. , Reinecke H.J. , Löwenthal I.
Published: May 2019

Airplanes and airports are in potential danger during transport of highly toxic chemicals, and accidents can occur if the wrapping material is damaged. The chemicals are listed and classified by the International Civil Aviation Authority ICAO) (7). They are subdivided into nine classes, each marked by a special symbol. The classification is derived from the most important properties of the chemicals in relation to the air transport (Table 1). Special positions are listed in class 6. This does not mean, however, that the chemicals of all other classes are non-toxic. On the contrary, highly toxic substances also exist in each other class. For example, class 2 “compressed gas” includes dangerous toxic substances such as hydrochloric acid, fluorine, carbon monoxide or sulphur dioxide. Class 3 (“flammable liquids”) includes benzene, methanol, acrylonitrile and ethyl methyl ketone, for example. In class 6 (“poisons”), special poisons are listed such as tetraethyl lead, dimethyl mercury, organophosphates and aniline. Class 8 (“corrosives”) consists of poisons like bromide, dimethyl sulphate, phorphorous trichloride and hydrofloric acid.
Emergency Medicine in the United States. Role in Disaster Planning and Management
Authors: Feldstein Bruce
Published: May 2019

International organizations such as the World Association for Emergency and Disaster Medicine (Club of Mainz) have brought attention to the need for improved worldwide emergency medical services (EMS) systems and disaster preparedness (1). Similar concerns in the United States (US) for improved emergency medical care have resulted in the organization of emergency medicine as a new medical specialty (2). The practice of this specialty of medicine in some ways differs from the practice of emergency medicine, reanimation medicine, or resuscitology, in Europe. In the United States, emergency medicine specialists provide emergency care for the full range of emergency health conditions, including accidents and trauma, medical emergencies, toxicologic emergencies, psychiatric and social emergencies, and disasters. This care is provided primarily in hospital emergency departments and includes the immediate initial recognition, evaluation, treatment and disposition of these patients with acute illness and injury. For continuing care, patients are referred to their own physicians.

Emergency medicine physicians provide medical direction for community EMS and supervise the prehospital emergency medical care provided by non-physicians (emergency medical technicians and paramedics). Emergency physicians engage in the administration, research and teaching of all aspects of emergency medical care. They also provide consultation to governmental and nongovernmental organizations on emergency health care issues. Recently, with the basic framework of emergency medicine established, attention is being given to disaster planning and management.
Nutritional State of Children in Jalalaksi Refugee Camps, Somalia
Authors: Hussein A. Shek , Yussuf M.I. , Tarsitani G. , Curti A.
Published: May 2019

Migration of whole populations, driven by natural calamities or war in search for safe territory, has come to the attention of International Organizations. The sanitary situation of refugee camps in Somalia which take care of the nomad populations arriving from the contested Ogaden territory, has been studied in Nov.-Dec. 1980 at the refugee camp of 3alalaksi. A study of the environment and organization of the camp was made to examine housing, water supply, sewage and alimentation. The nutritional state of refugees was recorded. The anthropometric data of 1185 children, including weight, height and arm circumference according to age and sex have provided interesting comparisons.
Simulation of the Crash of a Heavy Transport Plane on the International Airport Roissy–Charles–de–Gaulle
Authors: Lapandry C. , Valeri L. , Fleury M. , Bergot J. , Cupa M.
Published: May 2019

Airline companies, the Director of the International Paris Airport, and sanitary and administrative authorities of the Seine-Saint-Denis Dpt of SAMU were asked to organize a simulation of an aircraft crash on the site of the Charles-de-Gaulle airport. The two main purposes of this simulation were to check the efficiency of the rescue means from a technical point of view, the delays in the organization, and the coordination of services.

The scenario was an accident during take-off of a big jet. The fuselage of the plane was in three parts. There was an intense fire in the middle one. The crash happened at the end of the runway, on soft ground which was normally unapproachable for ordinary vehicles. The casualties were distributed according to aircraft accidents statistics; 200 military personnel and 30 volunteers of Civil Security participated. The victims were classified into 5 groups: 1) uninjured (30 in front and 40 in rear); 2) slightly injured (15 in frontand 15 in rear); 3) severely wounded (8 in front 4 in center, and 8 in rear); 4) critically injured (5 in front, 6 in center, and 4 in rear)); and 5) dead (95 in center).

The injured were simulated by first aid workers who had been trained and made up so as to be seen by the rescuers. Besides, they were given a tag on which was indicated the group, the types of injuries, the delay of survival without care, the necessary time for the diagnosis, and the appreciation of the victims.
Rescue from a Deep Well
Authors: Fava E. , Rossi M.
Published: May 2019

The impromptu and unforseeable problems, which the physician faced who was called upon to help a boy who had fallen into a deep well, are illustrated. Inability to recover the boy rapidly required oxygen and fluids to be provided in the well for over 2 days. The reasons why heroic efforts failed to save him will be presented in this rescue case report.

In reoccurring types of disasters, such as earthquakes and fires, the type of aid required can be predicted from previous experiences and results. Sometimes in cases involving one individual, who due to special circumstances is in danger of losing his life, rescue organizations have difficulty in organizing and providing the special aid required, which touches public sympathy, creating a state of general anxiety and interest. An unusual and dramatic case, the accidental fall of a boy into a deep well, had these characteristics. The intensive care unit (ICU) of our hospital had to deal with this extraordinary event. National and worldwide news media gave extensive coverage and direct transmission, with emotional details, ending with the drama of human life and the attempted rescue.

In the afternoon of 3une 10, 1981, in Vermicino, on the rural outskirts of Rome, a 6 year old boy did not return home. After carrying out an anxious and fruitless search, the parents informed the local authorities. The police continued the search, until they finally heard from the tunnel opening of an unmarked well the tearful wail of the boy.
Interventions in Civilian Nuclear Emergencies: An Operational Plan for Population and Injured Workers
Authors: Muzzi Armando , Strambi Ernesto , Trenta Giorgio
Published: May 2019

The authors describe Italian public health intervention planning for civil nuclear emergencies. With the exception of a few special aspects of prophylaxis and therapy, public health intervention in the case of nuclear emergencies are basically the same as those planned for “conventional emergencies,” however, a key role in nuclear emergencies could be played by the psychological aspect. Two different situations must be considered: 1) nuclear accidents involving workers only; and 2) nuclear accidents involving population as well. Differences in public health intervention required to address these two situations are discussed, both in terms of public health personnel involved, and of public health means and structures that should be available.
Psychometric properties of the Cognitive and Behavioural Responses Questionnaire (CBRQ) in adolescents with chronic fatigue syndrome
Authors: Loades M. E. , Vitoratou S. , Rimes K. A. , Ali S. , Chalder T.
Published: May 2019

Background:

To better understand the maintenance of chronic fatigue syndrome (CFS), a valid and reliable measure of cognitive and behavioural responses to symptoms is required. Such a measure could also assess beliefs and coping behaviours in the context of fatigue in other somatic conditions.

Aims:

We aimed to establish the psychometric properties of both the Cognitive and Behavioural Responses Questionnaire (CBRQ) and its shortened version (CBRQ-S) in adolescents with CFS.

Method:

The full questionnaire was completed by a clinical cohort of adolescents (n= 121) presenting to specialist CFS units in the UK.

Results:

Both the CBRQ and CBRQ-S had good internal consistency. The CBRQ scores were strongly associated with depression, anxiety, school and social functioning, but weakly associated with fatigue and physical functioning, providing evidence of validity.

Conclusion:

Both the 40-item and the 18-item versions of the CBRQ were found to be reliable and valid in adolescents with CFS. To minimize unnecessary burden, the 18-item version is favoured. Using this assessment tool in future studies, including intervention studies, may help to better target interventions during clinical practice and improve outcomes.
Boundary Detection in Three Dimensions With Application to the SMILE Mission: The Effect of Photon Noise
Authors: Jorgensen Anders M. , Sun Tianran , Wang Chi , Dai Lei , Sembay Steven , Wei Fei , Guo Yihong , Xu Ronglan
Published: May 2019

Imaging magnetospheric satellite missions provide information, which is complementary to in situ observations. Imaging is often able to provide an instantaneous picture of large‐scale structures, whereas in situ measurements, even multipoint in situ measurements, can only provide an average view of large‐scale structure. But imaging also presents some challenges. When three‐dimensional structures need to be extracted from two‐dimensional images, it is necessary to either make suitable assumptions or record a large enough number of images from different viewing geometries to allow a reconstruction (e.g., tomography). Imaging data exist over a wide range of sources including visible light, ultraviolet light, extreme ultraviolet, energetic neutral atoms, and X‐rays, each informing different physical mechanisms. In this paper we consider the extraction of the geometry of the magnetopause and the bow shock from single X‐ray images expected from the Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) mission. We examine the effect of photon‐counting noise in determining the boundary geometries. We also consider the effect of different viewing geometries in the form of orbital vantage point and target look direction. Finally, we consider the effect of background noise. We find that our approach is relatively robust to viewing geometry effects and works at low count rates.
Observing and Modeling Ice Sheet Surface Mass Balance
Authors: Lenaerts Jan T. M. , Medley Brooke , van den Broeke Michiel R. , Wouters Bert
Published: May 2019

Surface mass balance (SMB) provides mass input to the surface of the Antarctic and Greenland Ice Sheets and therefore comprises an important control on ice sheet mass balance and resulting contribution to global sea level change. As ice sheet SMB varies highly across multiple scales of space (meters to hundreds of kilometers) and time (hourly to decadal), it is notoriously challenging to observe and represent in models. In addition, SMB consists of multiple components, all of which depend on complex interactions between the atmosphere and the snow/ice surface, large‐scale atmospheric circulation and ocean conditions, and ice sheet topography. In this review, we present the state‐of‐the‐art knowledge and recent advances in ice sheet SMB observations and models, highlight current shortcomings, and propose future directions. Novel observational methods allow mapping SMB across larger areas, longer time periods, and/or at very high (subdaily) temporal frequency. As a recent observational breakthrough, cosmic ray counters provide direct estimates of SMB, circumventing the need for accurate snow density observations upon which many other techniques rely. Regional atmospheric climate models have drastically improved their simulation of ice sheet SMB in the last decade, thanks to the inclusion or improved representation of essential processes (e.g., clouds, blowing snow, and snow albedo), and by enhancing horizontal resolution (5–30 km). Future modeling efforts are required in improving Earth system models to match regional atmospheric climate model performance in simulating ice sheet SMB, and in reinforcing the efforts in developing statistical and dynamic downscaling to represent smaller‐scale SMB processes.
Western Mediterranean Subcontinental Mantle Emplacement by Continental Margin Obduction
Authors: Gueydan Frédéric , Mazzotti Stephane , Tiberi Christel , Cavin Remy , Villaseñor Antonio
Published: May 2019

Obduction is the tectonic process that results from thrusting of an oceanic lithosphere section (ophiolite) onto a continent. In contrast, thrusting of subcontinental mantle, observed in several mountain belts, remains a major unknown of plate tectonics. In the western Mediterranean, the Ronda and Beni Bousera peridotites are the largest worldwide subcontinental mantle exposure. From a geological point of view, the Ronda peridotites are exhumed by hyperstretching of the continental lithosphere in a back‐arc immediately followed by thrusting, explaining their present‐day position inside the Alboran crust. Using 2‐D and 3‐D modeling of new gravimetric data combined with local seismic tomography, we show that the Ronda peridotites are rooted inside the Alboran mantle along the entire Gibraltar arc. On these bases, we propose that the emplacement of the Ronda peridotites occurred in a back‐arc setting and corresponds to the thrusting of an entire hyper‐stretched continental margin onto a continent, a process that we define as continental margin obduction. This results from two successive deformation events: continental upper plate extension driven by slab roll‐back, immediately followed by upper plate shortening, likely triggered when a buoyant continental domain enters the subduction. We propose that this process affected the entire western Alboran domain, with peridotite bodies embedded within the crust along the whole Gibraltar Arc. We suggest that other examples such as the Alps Ivrea mantle body could likely represent continental margin obduction at the onset of continental collision.
On the Influence of Upstream Flow Contributions on the Basin Response Function for Hydrograph Prediction
Authors: Bunster Tomás , Gironás Jorge , Niemann Jeffrey D.
Published: May 2019

Spatially distributed travel time (SDTT) methods have been developed as an alternative to semidistributed and fully distributed methods for rainfall‐runoff modeling. In these methods, the travel times of grid cells are summed along flow paths and then convoluted to generate the hydrograph at the outlet. One central aspect of SDTT models that remains partially addressed is the effect of upstream flow contributions and their dynamics on the calculated flood wave travel times. Some methods neglect upstream contributions, but these are known to produce incorrect representations of the hydrological response. Other methods assume static upstream contributions, but the reliability of this approximation is poorly understood. In this study, we develop a new travel time method that accounts for dynamic upstream contributions. We test our method in three synthetic basins generated with a landscape evolution model that allows explicit control of primary watershed characteristics. We evaluate the method's performance for different storms by comparing its response to that produced by a fully distributed kinematic wave model. Furthermore, the method is tested in a real basin. We also analyze the dynamic behavior of the upstream contribution and travel times within the synthetic basins. Results show that existing static upstream contribution approaches in SDTT models do not adequately reproduce the hydrographs from the fully distributed kinematic wave model nor the observed hydrograph of the real basin. The proposed method improves the reproduction of hydrograph peak flows and temporal variability. Furthermore, the instantaneous unit hydrographs produced by the new method exhibit more positive skewness than the static approximations.
New Stamps Tell a Wild and Scenic River Story
Authors: Showstack Randy
Published: May 2019

The U.S. Postal Service has issued a new set of Forever postage stamps that feature evocative photos of some of the rivers protected by the U.S. National Wild and Scenic Rivers System.
Precipitation From Persistent Extremes is Increasing in Most Regions and Globally
Authors: Du Haibo , Alexander Lisa V. , Donat Markus G. , Lippmann Tanya , Srivastava Arvind , Salinger Jim , Kruger Andries , Choi Gwangyong , He Hong S. , Fujibe Fumiaki , Rusticucci Matilde , Nandintsetseg Banzragch , Manzanas Rodrigo , Rehman Shafiqur , Abbas Farhat , Zhai Panmao , Yabi Ibouraïma , Stambaugh Michael C. , Wang Shengzhong , Batbold Altangerel , de Oliveira Priscilla Teles , Adrees Muhammad , Hou Wei , Zong Shengwei , Santos e Silva Claudio Moises , Lucio Paulo Sergio , Wu Zhengfang
Published: May 2019

Extreme precipitation often persists for multiple days with variable duration but has usually been examined at fixed duration. Here we show that considering extreme persistent precipitation by complete event with variable duration, rather than a fixed temporal period, is a necessary metric to account for the complexity of changing precipitation. Observed global mean annual‐maximum precipitation is significantly stronger (49.5%) for persistent extremes than daily extremes. However, both globally observed and modeled rates of relative increases are lower for persistent extremes compared to daily extremes, especially for Southern Hemisphere and large regions in the 0‐45°N latitude band. Climate models also show significant differences in the magnitude and partly even the sign of local mean changes between daily and persistent extremes in global warming projections. Changes in extreme precipitation therefore are more complex than previously reported, and extreme precipitation events with varying duration should be taken into account for future climate change assessments.
CD271 is a molecular switch with divergent roles in melanoma and melanocyte development
Authors: Filipp Fabian V. , Li Chen , Boiko Alexander D.
Published: May 2019

Dysregulation of signaling networks controlling self-renewal and migration of developmental cell lineages is closely linked to the proliferative and invasive properties of tumors. Identification of such signaling pathways and their critical regulators is vital for successful design of effective targeted therapies against neoplastic tissue growth. The neurotrophin receptor (CD271/NGFR/p75NTR) is a key regulator of the melanocytic cell lineage through its ability to mediate cell growth, survival, and differentiation. Using clinical melanoma samples, normal melanocytes and global gene expression profiling we have investigated the role of CD271 in rewiring signal transduction networks of melanoma cells during neoplastic transformation. Our analysis demonstrates that depending on the cell fate of tumor initiation vs normal development, elevated levels of CD271 can serve as a switch between proliferation/survival and differentiation/cell death. Two divergent arms of neurotrophin signaling hold the balance between positive regulators of tumor growth controlled by E2F, MYC, SREBP1 and AKT3 pathways on the one hand, and differentiation, senescence, and apoptosis controlled by TRAF6/IRAK-dependent activation of AP1 and TP53 mediated processes on the other hand. A molecular network map revealed in this study uncovers CD271 as a context-specific molecular switch between normal development and malignant transformation.
The influence of progesterone on bovine uterine fluid energy, nucleotide, vitamin, cofactor, peptide, and xenobiotic composition during the conceptus elongation-initiation window
Authors: Simintiras Constantine A. , Sánchez José M. , McDonald Michael , Lonergan Patrick
Published: May 2019

Conceptus elongation coincides with one of the periods of greatest pregnancy loss in cattle and is characterized by rapid trophectoderm expansion, commencing ~ Day 13 of pregnancy, i.e. before maternal pregnancy recognition. The process has yet to be recapitulated in vitro and does not occur in the absence of uterine gland secretions in vivo. Moreover, conceptus elongation rates are positively correlated to systemic progesterone in maternal circulation. It is, therefore, a maternally-driven and progesterone-correlated developmental phenomenon. This study aimed to comprehensively characterize the biochemical composition of the uterine luminal fluid on Days 12–14 – the elongation-initiation window – in heifers with normal vs. high progesterone, to identify molecules potentially involved in conceptus elongation initiation. Specifically, nucleotide, vitamin, cofactor, xenobiotic, peptide, and energy metabolite profiles of uterine luminal fluid were examined. A total of 59 metabolites were identified, of which 6 and 3 displayed a respective progesterone and day effect, whereas 16 exhibited a day by progesterone interaction, of which 8 were nucleotide metabolites. Corresponding pathway enrichment analysis revealed that pyridoxal, ascorbate, tricarboxylic acid, purine, and pyrimidine metabolism are of likely importance to to conceptus elongation initiation. Moreover, progesterone reduced total metabolite abundance on Day 12 and may alter the uterine microbiome.
Bidirectional, Daily Temporal Associations between Sleep and Physical Activity in Adolescents
Authors: Master Lindsay , Nye Russell T. , Lee Soomi , Nahmod Nicole G. , Mariani Sara , Hale Lauren , Buxton Orfeu M.
Published: May 2019

This study evaluated the daily, temporal associations between sleep and daytime physical activity and sedentary behavior among adolescents from the Fragile Families & Child Wellbeing Study. A sub-sample of the cohort at age 15 (N = 417) wore actigraphy monitors for one week during the school year from which we derived daily minutes in sedentary and moderate-to-vigorous physical activity (MVPA) and nighttime sleep measures. Multilevel models tested temporal associations of nightly sleep onset, offset, duration, and sleep maintenance efficiency, with daily MVPA and sedentary behavior. More MVPA than an individual’s average was associated with earlier sleep onset (p < 0.0001), longer duration (p = 0.03), and higher sleep maintenance efficiency (p < 0.0001). On days with more sedentary behavior than an individual’s average, sleep onset and offset were delayed (p < 0.0001), duration was shorter (p < 0.0001), and sleep maintenance efficiency was higher (p = 0.0005). Conversely, nights with earlier sleep onset predicted more next-day sedentary behavior (p < 0.0001), and nights with later sleep offset and longer sleep duration were associated with less MVPA (p < 0.0001) and less sedentary time (p < 0.0001, p = 0.004) the next day. These bidirectional associations between sleep and physical activity suggest that promoting MVPA may help to elicit earlier bedtimes, lengthen sleep duration, and increase sleep efficiency, critical for healthy adolescent development.
Sexual dimorphism in Homo erectus inferred from 1.5 Ma footprints near Ileret, Kenya
Authors: Villmoare Brian , Hatala Kevin G. , Jungers William
Published: May 2019

Sexual dimorphism can be one of the most important indicators of social behavior in fossil species, but the effects of time averaging, geographic variation, and differential preservation can complicate attempts to determine this measure from preserved skeletal anatomy. Here we present an alternative, using footprints from near Ileret, Kenya, to assess the sexual dimorphism of presumptive African Homo erectus at 1.5 Ma. Footprint sites have several unique advantages not typically available to fossils: a single surface can sample a population over a very brief time (in this case likely not more than a single day), and the data are geographically constrained. Further, in many cases, the samples can be much larger than those from skeletal fossil assemblages. Our results indicate that East African Homo erectus was more dimorphic than modern Homo sapiens, although less so than highly dimorphic apes, suggesting that the Ileret footprints offer a unique window into an important transitional period in hominin social behavior.
Size and shape control of a variety of metallic nanostructures using tilted, rotating evaporation and lithographic lift-off techniques
Authors: Eschimese Damien , Vaurette François , Troadec David , Leveque Gaëtan , Melin Thierry , Arscott Steve
Published: May 2019

Here, we demonstrate a simple top-down method for nanotechnology whereby electron beam (ebeam) lithography can be combined with tilted, rotated thermal evaporation to control the topography and size of an assortment of metallic objects at the nanometre scale. In order to do this, the evaporation tilt angle is varied between 1 and 24°. The technique allows the 3-dimensional tailoring of a range of metallic object shapes from sharp, flat bottomed spikes to hollow cylinders and rings—all of which have rotational symmetry and whose critical dimensions are much smaller than the lithographic feature size. The lithographic feature size is varied from 400 nm down to 40 nm. The nanostructures are characterized using electron microscopy techniques—the specific shape can be predicted using topographic modelling of the deposition. Although individual nanostructures are studied here, the idea can easily be extended to fabricate arrays for e.g. photonics and metamaterials. Being a generic technique—depending on easily controlled lithographic and evaporation parameters—it can be readily incorporated into any standard planar process and could be adapted to suit other thin-film materials deposited using physical means.
Brain structures and functional connectivity associated with individual differences in trait proactive aggression
Authors: Zhu Wenfeng , Zhou Xiaolin , Xia Ling-Xiang
Published: May 2019

Although considerable efforts have been made to understand the neural underpinnings of (state) reactive aggression, which is triggered by provocation or perceived threat, little is known about the neural correlates of proactive aggression, which is driven by instrumental motivations to obtain personal gains through aggressive means and which varies dramatically across individuals in terms of tendency of appealing to such means. Here, by combining structural (grey matter density, GMD) and functional (resting-state functional connection, RSFC) fMRI, we investigated brain structures and functional networks related to trait proactive aggression. We found that individual differences in trait proactive aggression were positively associated with GMD in bilateral dorsolateral prefrontal cortex (DLPFC) and negatively correlated with GMD in posterior cingulate cortex (PCC); they were also negatively correlated with the strength of functional connectivity between left PCC and other brain regions, including right DLPFC, right IPL, right MPFC/ACC, and bilateral precuneus. These findings shed light on the differential brain bases of proactive and reactive aggressions and suggested the neural underpinnings of proactive aggression.
Removal of Arsenate and Chromate by Lanthanum-modified Granular Ceramic Material: The Critical Role of Coating Temperature
Authors: Yang Haiyan , Wang Yin , Bender John , Xu Shangping
Published: May 2019

The development of economical, low-maintenance, environmentally friendly and effective water filtration techniques can have far-reaching public health, social and economic benefits. In this research, a cost-effective La-modified granular ceramic material made of red art clay and recycled paper fiber was developed for the removal of two major anionic contaminants, As(V) (arsenate) and Cr(VI) (chromate). La modification temperature significantly impacted the resulting composition and properties of the adsorbents, and thus played a crucial role in the adsorbent performance. The La-modified ceramic materials were extensively characterized through scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area measurement, thermal gravimetric analysis (TGA), zeta potential measurements, and Fourier-transform infrared spectroscopy (FTIR) analysis. The characterization results suggested that surface coating by LaONO3-related compounds was critical for As(V) and Cr(VI) adsorption. At the modification temperature of 385 °C, the adsorption of As(V) and Cr(VI) reached maximum, which were 23 mg/g and 13 mg/g, respectively, under circumneutral conditions that are relevant to various aquatic systems. The adsorption kinetics and isotherm, the influence of pH, ionic strength and coexisting anions on As(V) and Cr(VI) adsorption were investigated to further understand both As(V) and Cr(VI) adsorption behavior. Findings from this research showed that La-modified ceramic material made of recycled paper waste represents a cost-effective adsorbent for anionic contaminant removal under environmentally relevant conditions.
Dietary tryptophan deficiency and its supplementation compromises inflammatory mechanisms and disease resistance in a teleost fish
Authors: Machado M. , Azeredo R. , Domingues A. , Fernandez-Boo S. , Dias J. , Conceição L. E. C. , Costas B.
Published: May 2019

Tryptophan participates on several physiological mechanisms of the neuroendocrine-immune network and plays a critical role in macrophages and lymphocytes function. This study intended to evaluate the modulatory effects of dietary tryptophan on the European seabass (Dicentrarchus labrax) immune status, inflammatory response and disease resistance to Photobacterium damselae piscicida. A tryptophan deficient diet (NTRP); a control diet (CTRL); and two other diets supplemented with tryptophan at 0.13% (TRP13) and 0.17% (TRP17) of feed weight were formulated. Fish were sampled at 2 and 4 weeks of feeding and the remaining were i.p. injected with Phdp (3 × 106 cfu/fish) at 4 weeks and the inflammatory response (at 4, 24, 48 and 72 hours post-infection) as well as survival were evaluated. Results suggest that fish immune status was not altered in a tryptophan deficient scenario whereas in response to an inflammatory insult, plasma cortisol levels increased and the immune cell response was compromised, which translated in a lower disease resistance. When dietary tryptophan was offered 30% above its requirement level, plasma cortisol increased and, in response to bacterial infection, a decrease in lymphocytes, monocytes/macrophages and several immune-related genes was observed, also compromising at some degree fish disease resistance.