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En el tiempo reciente, Mauricio Vasquez ha desarrollado, en conjunto con un grupo activo de estudiantes de la Maestria en Comunicacion Transmedia del Departamento de Comunicacion Social de la Universidad EAFIT, un proyecto pedagogico singular el cual consiste en hacer un retrato de la fiesta barroca entre los siglo XVI y XIX. Esta celebracion de origen colonial estaba constituida por una serie muy amplia de practicas escenicas y artefactuales que resultan familiares a la variantologia de los medios puestos que, tematica y operativamente, hacen referencia a fenomenos mecanicos, opticos y escenicos descritos por pensadores como el mallorquin Ramon Llull (1232-1315) o el aleman Athanasius Kircher (1602-1680). Algunos de los topicos expuestos en los nueve capitulos del presente libro son : la curaduria del programa de la fiesta barroca, los jeroglificos, la arquitectura temporal, los carros alegoricos, el teatro, los gabinetes opticos, los espectaculos de variedades, las fantasmagorias y las sesiones de espiritismo. Este tipo de investigacion es completamente relevante el dia de hoy porque Colombia y buena parte de America Latina fueron fundadas como producto de la Contrarreforma, y este fue en buena medida un proceso instrumental, un proceso profundamente mediatico que es necesario diseccionar y discutir, para conocer y decolonizar (Mignolo, 2003).

Surface water occurrence in river deltas is governed by precipitation, evaporation, and the influx and outflux of water to and from the delta. Although studies of changes in water occurrence have b...

Paramo ecosystems are tropical alpine grasslands, located above 3000 m.a.s.l. in the Andean mountain range. Their unique vegetation and soil characteristics, in combination with low temperature and abundant precipitation, create the most advantageous conditions for regulating and storing surface and groundwater. However, increasing temperatures and changing patterns of precipitation due to greenhouse-gas-emission climate change are threatening these fragile environments. In this study, we used regional observations and downscaled data for precipitation and minimum and maximum temperature during the reference period 1960&ndash, 1990 and simulations for the future period 2041&ndash, 2060 to study the present and future extents of paramo ecosystems in the Chingaza National Park (CNP), nearby Colombia&rsquo, s capital city, Bogot&aacute, The historical data were used for establishing upper and lower precipitation and temperature boundaries to determine the locations where paramo ecosystems currently thrive. Our results found that increasing mean monthly temperatures and changing precipitation will render 39 to 52% of the current paramo extent in CNP unsuitable for these ecosystems during the dry season, and 13 to 34% during the wet season. The greatest loss of paramo area will occur during the dry season and for the representative concentration pathway (RCP) scenario 8.5, when both temperature and precipitation boundaries are more prone to be exceeded. Although our initial estimates show the future impact on paramos and the water security of Bogot&aacute, due to climate change, complex internal and external interactions in paramo ecosystems make it essential to study other influencing climatic parameters (e.g., soil, topography, wind, etc.) apart from temperature and precipitation.

The relationship between climate and forest is critical to understanding the influence of future climate change on terrestrial ecosystems. Research on trees at high elevations has uncovered the relationship in the Hengduan Mountains region, a critical biodiversity hotspot area in southwestern China. The relationship for the area at low elevations below 2800 m a.s.l. in the region remains unclear. In this study, we developed tree ring width chronologies of Pinus yunnanensis Franch. at five sites with elevations of 1170&ndash, 1725 m in this area. Monthly precipitation, relative humidity, maximum/mean/minimum air temperature and the standardized precipitation evapotranspiration index (SPEI), a drought indicator with a multi-timescale, were used to investigate the radial growth&mdash, climate relationship. Results show that the growth of P. yunnanensis at different sites has a similar response pattern to climate variation. Relative humidity, precipitation, and air temperature in the dry season, especially in its last month (May), are critical to the radial growth of trees. Supplemental precipitation amounts and reduced mean or maximum air temperature can promote tree growth. The high correlations between chronologies and SPEI indicate that the radial growth of trees at the low elevations of the region is significantly limited by the moisture availability. Precipitation in the last month of the previous wet season determines the drought regime in the following dry seasons. In spite of some differences in the magnitudes of correlations in the low-elevation area of the Hengduan Mountains region, chronologies generally matched well with each other at different elevations, and the differences are not evident with the change in elevation.

Man-made reservoirs and lakes are key elements in the terrestrial water system. The increased concern about the impact of anthropogenic interventions on and the dynamics of these water resources has given rise to various approaches for representing human-water interactions in land surface models. Synthetic aperture radar interferometry (InSAR) has become a powerful geodetic tool for this purpose, by evidencing changes of ground and water surfaces across time and space. In this research, the Lake Mead and associated Hoover Dam are studied using Small Baseline Subset (SBAS) technique. Lake Mead is the largest reservoir in the United States, in terms of water capacity, supplies water and hydropower for millions of people in Las Vegas, Los Angeles and southwestern part of the USA. In recent years, rising temperature, increasing evaporation and decreasing precipitation have decreased water levels substantially, and probably modified its surrounding groundwater and surface as well.This study aims to identify a hydrology-induced ground deformation around the lake Mead and a probable Hoover dam movement displacement. For the reservoir, we used the SBAS technique using 138 SAR data, including ERS1/2, Envisat, ALOS PALSAR and Sentinel-1, covering a time-spam between 1995 and 2019. For the analysis on the dam, we used the SBAS technique from 2014 to 2019 with descending and ascending modes of Sentinel-1A/B imageries. We found two main deformation patterns around the lake associated with the water level changes. Firstly, ERS and Sentinel-1 data evidenced a ground deformation that manifested itself as as a subsidence pattern in 1995 that has gradually changed into an uplift up to 2019. Secondly, the correlation trend between the deformation and water level changes has changed from negative to positive, with a transition point around March 2008. A possible interpretation for this is that the ground has initially reacted to the water fluctuations in the reservoir before March 2008 but after no longer plays a dominant role in the deformation occurring around the lake. The findings will help us to have a better understanding over the changes happened around the lake due to the water level changes and provide the valuable information for more effective management and maintenance of hydraulic structures and facilities near by the lake and water control in the future.

The planetary boundaries framework defines nine Earth system processes that together demarcate a safe operating space for humanity at the planetary scale. Freshwater - the bloodstream of the biosphere - is an obvious member of the planetary boundary framework. Water fluxes and stores play a key role for the stability of the Earth’s climate and the world’s aquatic and terrestrial ecosystems. Recent work has proposed to represent the water planetary boundary through six sub-boundaries based on the five primary water stores, i.e., atmospheric water, soil moisture, surface water, groundwater, and frozen water. In order to make it usable on all spatial scales we examine bottom-up and top-down approaches for quantification of the water planetary boundary. For the bottom-up approaches, we explore possible spatially distributed variables defining each of the proposed sub-boundaries, as well as possible weighting factors and keystone regions that can be used for aggregation of the distributed water sub-boundaries to the global scale. For the top-down approaches, we re-examine the stability of key biomes and tipping elements in the Earth System that may be crucially influenced by water cycle modifications. To identify the most appropriate variables for representing the water planetary boundary, we evaluate the range of explored variables with regard to scientific evidence and scientific representation using a hierarchy-based evaluation framework. Finally, we compare the highest ranked top-down and bottom-up approaches in terms of the scientific outcome and implications for governance. In sum, this comprehensive and systematic identification and evaluation of variables, weighting factors, and baseline conditions provides a detailed basis for the future operational quantification of the water planetary boundary.

Lake Baikal, located in eastern Russia, is the oldest (25 million years) and the deepest (~1800 meters) lake in the world. There are many rivers flowing into the Lake Baikal (~ 365 rivers), of which the Selenga River is the most important one being responsible for almost 55% of the runoff water into the system and also 60% of the transported sediments. As the hydrological changes of the river and its delta enormously alter the neighbouring area, it is of utmost importance to explore the dynamics of change in terms of flow magnitude, paths and fluvial geomorphology, and the related tipping points defining different states. The questions this study aims to answer are: What are the fluvial geomorphological and hydrological changes? What fluvial geomorphological tipping points can be identified during the last 34 years and what are the discharge and climatic conditions that induce them? In this study, we use the Global Surface Water Dataset (GSWD) to analyze the changes in the river’s stream network. With these products, we assess changes in several fluvial geomorphological proxies (e.g., sinuosity, fractal dimension, meandering characteristics, planform information) and identify possible tipping points. We relate these changes to different hydrological and climatic conditions such as precipitation, river discharge and Lake Baikal water level. We find evident changes in the meandering behaviour and flow path of the Selenga River tributaries in the Delta. The number of oxbow lakes based and corresponding size distribution has varied in time, and evident flow path changes occur that seem to be related to flooding periods, and there appears to be a consistent relationship between meandering and the river discharge variability. These results enable policymakers to understand different contributing factors altering the Selenga River Delta and ultimately leading to better decisions to manage the effects of these changes in the area.

The identification of tipping points in the water cycle has been recently ranked Nr. 1 in the list of the top 23 unresolved problems in Hydrology by the International Association of Hydrological Sciences (IAHS) and as a priority in the field of hydrology and water resources by several studies. Such daunting task is mainly attributed to the concerns that greenhouse gas emission climate change may tip the water cycle into an unfavorable new state. Up to date, tipping points occurring in complex dynamical systems have been identified across a large set of disciplines. In most proven tipping points, hydrologic variables are always taken as the control variables, as changes in water fluxes and stocks are known to act as stressors of socioecological systems, and the affected aquatic and terrestrial ecosystems as the response variables. The main objective of this study is to explore the existence of tipping points in catchment-scale freshwater availability, that is, the tipping points were the response variable is catchment water storage. We first review the existence of reported tipping points in the field of hydrology and water resources, to establish a coherent framework for the identification of hydrological tipping points. We explore their mathematical existence at the catchment scale by Linear Stability Analysis, illustrating cases with potential functions and bifurcation diagrams. We then explore any possible contribution to the existence of hydrological tipping points by adding complexity to the hydrological dynamic system through the inclusion of sociological feedbacks. We find that even with the inclusion of the moisture feedback of evapotranspiration to precipitation, constant socioecological conditions will most likely not present tipping points of water storage in the catchment. However, the inclusion of socioecological feedbacks does generate tipping points under certain assumptions, even without assuming a moisture feedback between evapotranspiration and precipitation. We hope that this study sheds some light on the existence, conditions, assumptions and characteristics of large-scale hydrological tipping points with long-term implications.

The planetary boundaries framework has proven useful for many global sustainability contexts, but is challenging to apply to freshwater, which is spatially heterogeneous, part of complex socio-ecological systems and often dominated by local dynamics. To date, the planetary boundary for water has been simplistically defined by as the global rate of blue water consumption, functioning as a proxy for water partitioning in the global hydrological cycle, and considering impacts on rivers’ environmental flow requirements. We suggest the current planetary boundary should be replaced since it does not adequately represent the influence of water in critical Earth System functions such as regional climate and biodiversity. We review the core functions of water in the Earth System and set out a roadmap towards a more robust, holistic, and locally applicable water planetary boundary. We propose defining the boundary using four core functions of water (hydroclimatic regulation, hydroecological regulation, storage, and transport) in conjunction with five water stores (surface water, atmospheric water, soil moisture, groundwater and frozen water). Through the functions, the stores are inextricably interconnected with the atmosphere, land, ocean and biosphere. The roadmap outlined here suggests how to move towards setting six new water planetary sub-boundaries. This ambitious scientific and policy Grand Challenge that could substantially improve our understanding and management of water cycle modifications in the Earth System and provide a complementary approach to existing water management tools.

International audience; Service businesses are increasingly facing more demanding customers as a result of a shift in power from the service providers' side to the customers' side. Related literature predominantly examines the negative side of this ongoing trend, while overlooking the positive side. The major aim of this paper is to examine how frontline employees — investment account managers — deal with the ongoing increase in customer demandingness. To address this, we draw on adaptability performance theory to test the facilitating effect of frontline employees' post-transaction service behaviors (SBs) — diligence, inducements, information communication, sportsmanship, and empathy — as a means of adaptation to higher levels of customer demand. Findings indicate that frontline employees adapt most of their SBs' intensities to match customers' demands. The results show that some SBs actually increase the effectiveness and efficiency of frontline employees' service performance, leading to an increase in customer value and satisfaction. Customer value is found as a mediator in some of the relationships between SBs and customer satisfaction. Contrary to the conception of the negative outcomes of customer demandingness, service firms need to consider taking advantage of customer demandingness by stressing the role of frontline employees in adapting to customers’ demands.

In order to increase the prevalence of wave energy converters (WECs), they must provide energy at competitive prices, especially when compared with other renewable energy sources. Thus, it is imperative to develop control system technologies that are able to maximize energy extraction from waves, such that the delivered energy cost is reduced. An important part of a model-based controller is the model that it uses. System identification techniques (SITs) provide methodologies to get accurate dynamic models from input-output data. However, even though these techniques are well developed in other application areas, they are seldom used in the context of WECs. This paper proposes several strategies based on SIT to get a linear time-invariant model for a three-body hinge-barge wave energy device using experimental data. The main advantage of the model obtained with this methodology, against other methods such as linear potential theory, is that this model remains valid even for relatively large waves and WEC displacements. Other advantages of this model are its simplicity and the low computational resources that it needs. Numerical simulations are carried out to show the validation of the obtained model against recorded experimental data.

This paper develops a multi-sector model of middle-class-led economic growth, whereby (i) learning by doing interacts with scale economies and nonhomothetic preferences giving rise to endogenous growth, and (ii) the “middle class” label is an endogenous outcome of the model, depending on past economic growth. The emphasis is placed on the entire income distribution, which affects the composition of demand - range of goods consumed - and in turn, the speed and extent of the learning process in the range of goods produced. Learning is sector specific, bounded from above, and constrained by a minimum scale restriction. It starts with a switch from traditional to modern technologies, understood as structural change. A higher share in the purchasing power of the middle class expands the market size for modern goods, and generates more learning in non-mature modern technologies, contributing to productivity gains, and under certain conditions (e.g. a significant learning potential), to sustained growth. Eventually, we make the case for a strong middle class; that is, redistributive policies towards the middle class and the poor. © 2019 Elsevier Inc.

This paper describes design improvement of a current reference, originally based on dual-threshold voltage current mirror stages, these stages have been modified in order to improve the temperature dependence of the current of a diode-connected transistor and the figures of merit to compare this circuit both the base-circuit. The proposed solution has been designed in a 0.18 \text{\ensuremath{\mu}m} technology and analyzed through circuit simulation. Simulation results, when a body-bias generator is used, show an output current of 342 nA and a power consumption below 513 nW at the maximum operating voltage of 1.5 V and at the room temperature. The line sensitivity is 1 %/V, while the temperature coefficient is 17 ppm/°C. On the other hand, when the body-bias generator is neglected, the circuit shows an output current of 188 nA and a power consumption below 282 nW at the maximum operating voltage of 1.5V and at the room temperature. The line sensitivity is 2.89 %/V, while the temperature coefficient is 23 ppm/°C. Resumen Hoy en día, los espejos de corriente o current reference, pueden ser mejorados con las características de inversión débil subthreshold-region cuando son construidos con tecnología CMOS, está tesis trata sobre cuatro estructuras de current reference basadas en un circuito de solo tres transistores, las figuras de merito como coeficiente de temperatura, consumo de potencia, y sensibilidad de carga y proceso son obtenidas en cada una de las estructuras, y posteriormente son comparadas para disernir cual de las implementaciones ha presentado un mejor desempeño. Las simulaciones fueron realizadas en una tecnología de 180 nm, nanómetros, TSMC CMOS usando transistores de tipo MEDIUM VOLTAGE THRESHOLD (MVT) para un voltaje máximo de alimentación de 2 y 3 voltios. La tesis esta compuesta de cuatro capítulos, el primero muestra los principios físicos para inducir una corriente cuando el transistor MOSFET se encuentra en la región de subthreshold, lineal y saturación. El segundo capitulo muestra las especificaciones tomadas en cuenta para implementar los cuatro diferentes diseños, como son el dimensionamiento y los parámetros eléctricos de las fuentes de alimentación, los diseños fueron implementados en Virtuoso de Cadence. El tercer capitulo muestra los resultados obtenidos en cada uno de los circuitos y una comparativa de las figuras de merito calculadas. Finalmente, el cuarto capitulo muestra las conclusiones de cada bloque, los beneficios obtenidos al implementar cada uno de los diseños así como la mejor solución acorde a las figuras de merito obtenidas.

El angiosarcoma cutáneo es un tumor poco frecuente con tendencia a localizarse en la cabeza y el cuello, en especial en el cuero cabelludo y la cara. Es considerado un tumor de rápido crecimiento y frecuentemente hace metástasis a distancia. Su tratamiento no está claramente definido y es basado en estudios retrospectivos y reportes de caso. Al parecer, la mejor opción de manejo es la cirugía con resección local amplia y, en lo posible, con bordes negativos; posteriormente, radioterapia adyuvante, debido a la alta tasa de recaída que presentan estos tumores. Se presenta el caso de un paciente de 91 años quien recibió manejo exclusivo con radioterapia hipofraccionada, quien presentó respuesta completa a los tres meses de finalizar y permaneció libre de enfermedad hasta la fecha de este reporte, 16 meses después de la radioterapia.

Purpose Mobile technologies have become indispensable in sales. However, there is a lack of agreement about whether mobile technology use facilitates the sales job or contributes to the salesperson’s stress and reduced job satisfaction. To address this controversy, this study aims to examine the effect of mobile technology use (smartphones, laptop computers and tablets) on salespeople’s role stress and job satisfaction. Design/methodology/approach Hypotheses are tested using responses of 265 sales employees working for a broad range of industries in Spain. Findings This study shows that mobile technology use during working hours has a positive effect on job satisfaction through a mediating process that involves role stress. In addition, the impact of mobile technology use on role stress is strengthened by technological compatibility. Originality/value The current study extends previous research by moving beyond a focus on technology-centric outcomes (i.e. sales performance) to understanding broader, more psychological outcomes, namely, role stress and job satisfaction. Importantly, previous research reporting that salespeople feel “plugged in” to a device all day have not made the distinction about when the mobile device is used. One important difference in this study is that it exclusively focuses on mobile technology use during working hours.

The Cienaga Grande de Santa Marta (CGSM), Colombia is possibly the wetland that has experienced the largest mangrove mortality on record due to modification of hydrologic connectivity and consequent hypersaline conditions. We used hydroclimatic, salinity and mangrove basal area data collected in five stations from 1993 to 2015 to study the relation between ongoing mangrove recovery, changes in salinity in the wetland and hydroclimatic changes in precipitation, potential evapotranspiration and freshwater inputs. We found that until 2015, the mangrove ecosystems in CGSM are in general terms in a path of recovery due to the combined effect of favorable hydroclimatic conditions and management operations to increase freshwater inputs into the wetland. We observed in three stations that the annual growth of mangrove basal area increased as pore water salinity decreased. Regarding surface water salinity, El Nino/Southern Oscillation explained most of the inter-annual variability in the wet season by regulating freshwater and in the dry season by regulating potential evaporation from the wetland. However, persistent channel reopening appeared to be the cause for the largest salinity decreases, whereas lack of persistent dredging slowed recovery in other areas. The monitoring of the mangrove-salinity-hydroclimate system must continue in order to increase its understanding and to avoid more recurring episodes of mangrove mortality.

The nature of causality between international trade and industrialization remains ambiguous. We consider a model of international trade that features the home market effect—where there are differences in income and productivity between sectors and between countries—to identify additional channels by which to determine the effects of international trade on industrialization. The introduction of non-homothetic preferences and differences in productivity can aid in interpreting of some apparent paradoxes within international trade, such as the commercial relations between more populated countries as China and India and large economies in term of their GDP as the U.S. Population size, demand composition, and productivity levels constitute the three main channels by which to determine the effects of international trade. Interactions among these channels define the results obtained, especially in terms of the countries’ industrialization levels. Additionally, we find that welfare levels under trade are always higher than those under autarky.

Little information is apparently available regarding the nephrotoxic effects induced by pesticides. The aim of this study was to examine the influence of low doses of methyl parathion (MP) on the structure and function of the kidney of male Wistar rats. A corn oil (vehicle) was administered to control rats, whereas treated rats received MP at 0.56 mg/kg orally (1/25 of LD

Water management by the impoundment of reservoirs has been found to influence evapotranspiration not only locally but also at the basin scale. Highly regulated hydrological basins generally show the effect of a net increase in evapotranspiration accompanying the successive impoundment of reservoirs. However, understanding and isolating the effect from a particular single impounded reservoir remains a challenge due to the lack of long-term observation data required and the existence of many other drivers present at the basin scale. Focusing on the hydrological basin having the largest hydropower potential in China, we isolated in time and space and quantified the effects of a single impounded reservoir on evapotranspiration and the evaporative ratio (i.e., the ratio of actual evapotranspiration to precipitation) before and after the construction of the Ertan Dam in 1998. We find that the dam has increased evapotranspiration in the smallest subbasin by 46±15 mm/yr and the evaporative ratio by 0.05±0.015, from the period before impoundment (1983-1997) to that after impoundment (2000-2012). This increase is found only within the smallest differential subbasin holding the impounded reservoir and cannot be explained by other changes in land use or vegetation. We use this result from our hydrological basin-constrained approach to calculate the water footprint of the hydroelectric project as 16.5 m3/GJ, which accounts for additional hydroclimatic effects of the impoundment of the reservoir beyond the water surface. Hence, this study finds that when runoff data is available, the water consumption and the water footprint of hydropower projects can be calculated by water mass balance at the scale of their hydrological basins.

At the local scale, artificial impounded reservoirs in dry regions exert influence on the surrounding local climate. Impounded reservoirs have been found to alter precipitation patterns and increase temperature, specific humidity and surface evaporation. The consequences of impoundment or its related climatic changes on the surrounding vegetation are still not well understood. We here examined the potential effect on surrounding tree growth from the impoundment of the Ertan Reservoir, China, in 1998. We measured Yunnan pine tree rings at three sites on a slope close to the reservoir and two control sites far away from the reservoir. We compared the annual radial growth of tree rings at all sites with air temperature, precipitation and air humidity in the region. We also used cumulative distribution functions to quantify the probability of attributing radial growth changes to background climate variability. We find an enhancement of tree growth from 2000 to 2002, right after the reservoir's impounding in experimental and control sites. The tree growth can initially be explained by favourable conditions benefiting tree growth. However, we cannot entirely attribute such enhancement to the background climate variability when studying the relationship between tree growth and climatic variables over the 36 years and their probability of occurrence. Hence, we infer that the tree growth in the three years following impoundment can only be attributed to the simultaneous effect of favourable regional climate conditions and the reservoir's impoundment in itself. These conditions decrease vegetation stress by decreasing air temperature and increasing air relative humidity. Although the findings of this study shed more light on the environmental and climatic changes induced by the impoundment of reservoirs, they also call for the need of monitoring climatic variables in the vicinity of the reservoirs.

Gingko biloba leaves have been used as herbal medicine in China for 5000 years, and the standardized leaf extract (GB-STE) has some beneficial effects in the treatment of age-related, cardiovascular, and neurological diseases. The aim of this study was to investigate the renoprotective effects of the Gingko biloba extract (GbE) against the toxicity of a single and relatively low dose of carbon tetrachloride (CCl4). In male adult Wistar rats, we determined the urine flux, the concentration of total proteins in urine, the concentration of glucose in urine, and the concentration of malondialdehyde (MDA) in renal cortex as well as two markers of renal function (clearance of inulin and p-aminohippurate); we also compared the histological lesions caused by CCl4. Carbon tetrachloride increased the urinary concentration of total proteins, and the renal concentration of MDA; however, it did not modify the urine flux, urinary concentration of glucose, nor the inuline or the p-aminohipurate clearances. Morphologically, CCl4 generated some tubular damage that was more intense in the inner cortex of kidneys. The GbE extract counteracted the effects of CCl4 on the concentration of total proteins in urine, the concentration of renal MDA, and the renal histological changes. In conclusion the main toxic effects produced by CCl4 were prevented by the GbE, probably due to their antioxidant properties and the inhibition of the main P450 isoenzyme (CYP2E1) that metabolize CCl4.

While previous literature provides evidence of the positive relationship between ethical climate and job satisfaction, the possible mechanisms of this relationship are still underexplored. This study aims to enhance scholars’ and practitioners’ understanding of the ethical climate–job satisfaction relationship by identifying and testing two of the possible mechanisms. More specifically, this study fills an existing research gap by examining social and interpersonal mechanisms, referred to in this study as workplace isolation of colleagues and salesperson’s teamwork, of the ethical climate–job satisfaction relationship. This is vital for the selling profession because job satisfaction is known to drive higher levels of salespeople’s performance. The arguments for such mechanisms are built on the foundations of social/psychological contract theory and ethical climate literature. Empirical testing using a large sample of salespeople shows higher levels of ethical climate to decrease workplace isolation and increase teamwork. Findings support hypothesized model where ethical climate positively relates to job satisfaction as partially mediated by workplace isolation and teamwork. Ethical climate is negatively related to workplace isolation and positively to teamwork. Further, findings indicate negative effect of workplace isolation on teamwork and sales performance. Job satisfaction is found to be key factor in driving performance of salespeople.

We study the single machine preemptive scheduling problem with both regular and overtime modes.The objective is to minimize the total tardiness and overtime costs.We propose a heuristic solution methodology for the problem.The efficiency of the heuristic is tested with upper bounds generated by the mathematical model. This paper studies the scheduling of a finite set of jobs on a single resource that operates under both regular and overtime capacity modes. Jobs, which can be preempted, have associated release and due dates. Limited overtime capacity can be utilized to reduce tardiness. However, since overtime is costly, justification of the overtime use depends on the trade-off between the tardiness and the overtime costs. The overall objective is to minimize the total cost of tardiness and overtime. To achieve this objective, we develop a holistic method composed of three-stages. We first provide a heuristic based on an effective priority rule for the base case where no overtime capacity is considered. This heuristic is later employed in the first-stage to produce a compact non-delay schedule built based on the assumption that overtime capacity incurs no additional cost. In the second stage, the overtime usage is reduced by shifting workload and generating a full-delay schedule without altering the tardiness of jobs produced in the first stage. The third stage improves the total costs by altering the tardiness of jobs in return for savings in overtime utilization. Using computational tests, we compare the performance of our heuristics to the upper bounds generated by the exact mixed-integer programming formulation. The results show that the proposed method is efficient in obtaining solutions that are considerably better than the generated upper bounds in significantly short times and as such, it can be quite useful as an effective solution approach especially for large size problems.

Meta-analytic inquiries enable researchers to synthesize empirical findings obtained over the evolution of a topic area and identify boundary conditions affecting the associations of key variables. Sales researchers can employ meta-analytic techniques to amalgamate empirical work conducted in a given topic area, and several sales researchers have effectively used meta-analyses to advance our understanding of the field. This article provides an exposition of this research design by analyzing its application in sales research. The authors review the meta-analytic studies in sales research and advance key considerations in topical foci, article selection, data coding and evaluation, and analytic approaches. An empirical example is provided to illustrate the power of meta-analysis in substantiating or refuting findings that diverge from accumulated insight in sales research. Results provide support for a positive effort–job satisfaction association in contrast to findings evidencing a negative association bet...

Purpose The aim of this study is to reveal the contribution that Journal of Business & Industrial Marketing has to scientific research and its most influential thematic work in B-to-B since its beginning in 1986 until 2015, in commemoration of the 30th anniversary. Design/methodology/approach The paper begins with a qualitative introduction: the emergence of the magazine, its origins, editorial and positioning. Subsequently, it is based on bibliometric methodologies to develop quantitative analysis. The distribution of annual publications is analyzed, the most cited papers, the keywords that are mostly used, the influence on the publishing industry and authors, universities and the countries that have the most publications. Findings The predominant role of the USA at all levels is highlighted. It also highlights the presence (given its size and population) of the countries of Northern Europe. There is great interest in appreciating the evolution of the number of publications that are always increasing which demonstrates the growing and sustained interest in these types of articles, with certain times of retreat (often coincide with economic crisis). Research limitations/implications The Scopus database gives one unit to each author, university or country involved in the paper, without distinguishing whether it was one or more authors in the study. Therefore, this may bring some deviations in the analysis. However, the study considers some figures with fractional counting to partially solve these limitations. Practical implications After observing the different perspectives of the journal’s production, it allows to give an objective view of the evolution that the Journal of Business & Industrial Marketing has had in the past 30 years. Originality/value It is part of the trend that several journals (Journal of Marketing, Journal of Public Policy & Marketing, Journal of Marketing Research, Journal of Business Research) made special sections to show progress and contribution of these journals to scientific research.

This research investigates the effects of sales-service ambidexterity on salesperson role perceptions, behaviors, and customer satisfaction. Using a business-to-business, salesperson-customer sample, we build and test a model which highlights both the positive and negative consequences of this simultaneous goal pursuit. Specifically, while sales-service ambidexterity positively impacts adaptive selling behaviors, it also increases perceptions of role conflict among salespeople. Customer demandingness moderates these relationships. Taken together, the results provide insights for firms on how to manage their sales force to optimize both sales and service outcomes based on characteristics of their salespeople and customers.

Este volumen contiene los trabajos presentados y discutidos en el IX Coloquio de la Sociedad Colombiana de Filosofía, que se reunió en la Facultad de Ciencias Humanas de la Universidad Nacional de Colombia en Bogotá durante los días 20 y 21 de abril de 1989. La temática del Coloquio giró en torno a la obra del filósofo vienés Ludwíg Wittgenstein, cuya influencia sobre las dos corrientes más importantes de la filosofía contemporánea, la Filosofía Neopositivista y la Filosofía Analítica, ha sido universalmente reconocida. Esta doble influencia asociada a dos de los trabajos más importantes del filósofo (su Tractatus Lógico-Philosophicus y las Investigaciones Lógicas Filosóficas) corresponde también a dos momentos claramente diferenciados en la evolución intelectual de su pensamiento.

El libro examina el desempeno del sector externo colombiano desde 1950 con enfasis en las politicas de comercio exterior, las instituciones que disenan y ejecutan la politica, y los efectos de la proteccion sobre los costos de participar en el comercio internacional, , la productividad de la economia, y los incentivos para exportar. La publicacion desarrolla estos temas en tres secciones. La primera examina la historia de la politica comercial, las instituciones del sector externo y la participacion de Colombia en el comercio mundial. La segunda parte cuantifica los costos de comerciar y el monto de la proteccion a la produccion local, esencialmente la manufacturera, en el periodo 1950-2016. La tercera parte cuantifica los desincentivos para exportar y el impacto del proteccionismo sobre la productividad del sector manufacturero. A lo largo del libro se explica como durante setenta anos la economia colombiana experimento cambios importantes en su politica comercial y en las instituciones que gobiernan el sector externo. Aunque en distintas epocas se busco liberalizar el comercio, el proteccionismo reino durante todo el periodo. Casi siempre, las razones coyunturales determinaron los intentos de libera lizacion, y en muy contadas ocasiones puede decirse que la busqueda de una apertura a la competencia externa obedecio a un proposito genuino de liberalizar el comercio con el fin de hacer mas productiva y eficiente a la economia colombiana. Al tiempo que los instrumentos de control crecieron y cambiaron en el tiempo, volcandose hacia un uso intensivo de las medidas no arancelarias, el andamiaje institucional y regulatorio se torno mas extenso y complejo, afectando la calidad de las instituciones del sector. En resumen, el libro concluye que Colombia no ha explotado su potencial exportador porque los incentivos para hacerlo han sido magros, un resultado de la alta proteccion a la produccion nacional, de una infraestructura y de unos servicios logisticos ineficientes y costosos. Una apertura verdadera de la economia contribuiria a a reducir los costos de comerciar, a aumentar la productividad en forma significativa y a crear incentivos para exportar bienes de mayor valor agregado, todo ello en beneficio de una participacion mas intensiva de Colombia en las redes de comercio internacional.

Coastal Louisiana hosts 37% of the coastal wetland area in the conterminous US, including one of the deltaic coastal regions more susceptible to the synergy of human and natural impacts causing wetland loss. As a result of the construction of flood protection infrastructure, dredging of channels across wetlands for oil/gas exploration and maritime transport activities, coastal Louisiana has lost approximately 4900 km2 of wetland area since the early 1930s. Despite the economic relevance of both wetland biomass and net primary productivity (NPP) as ecosystem services, there is a lack of vegetation simulation models to forecast the trends of those functional attributes at the landscape level as hydrological restoration projects are implemented. Here, we review the availability of peer-reviewed biomass and NPP wetland data (below and aboveground) published during the period 1976&ndash, 2015 for use in the development, calibration and validation of high spatial resolution (&lt, 200 m &times, 200 m) vegetation process-based ecological models. We discuss and list the knowledge gaps for those species that represent vegetation community associations of ecological importance, including the long-term research issues associated to limited number of paired belowground biomass and productivity studies across hydrological basins currently undergoing different freshwater diversions management regimes and hydrological restoration priorities.

Este documento utiliza desarrollos metodologicos recientes para la estimacion del equivalente arancelario de las barreras no arancelarias en Colombia a un nivel de desagregacion de Nandina 10 digitos. A este mismo nivel de desagregacion se estima la proteccion total, el indice de proteccion al comercio (TRI) y el indice conjunto de proteccion al comercio (OTRI). Los resultados muestran un alto grado de sustituibilidad entre la barreras arancelarias y no arancelarias en Colombia, siendo estas ultimas un instrumento de regulacion ampliamente utilizado en los diferentes sectores economicos. Igualmente se evidencia un alto y creciente nivel de proteccion en Colombia, siendo el sector agropecuario el que presenta un mayor indice de restriccion al comercio. Contrario a lo esperado, no parece existir una apertura economica a los mercados internacionales.

Este documento analiza la evolucion de la productividad total factorial en la industria colombiana entre 1993 y 2011 haciendo uso de datos a nivel de firma. La determinacion de la productividad total factorial es bastante importante debido a sus implicaciones en el crecimiento economico, la innovacion y el nivel de ingresos del pais. Una vez definida la evolucion de la productividad total factorial se estudian sus determinantes. Fundamentalmente se consideran especificaciones que evaluan la importancia de la apertura economica y el nivel de concentracion de la produccion sobre los niveles de productividad. Los resultados muestran un estancamiento en la productividad factorial en la industria manufacturera del pais y, ademas, se identifica una relacion directa entre los niveles de incorporacion de las firmas a los mercados internacionales y su nivel de productividad.

El presente articulo estima las elasticidades de oferta y demanda de importaciones a un nivel de desagregacion de Nandina 10 digitos para Colombia. A diferencia de las estimaciones previamente realizadas, la metodologia utilizada admite un nivel de desagregacion en las elasticidades calculadas, casi a nivel de producto. Ademas, permite una estimacion insesgada de las elasticidades de oferta y demanda de importaciones debido a que toma en cuenta la entrada y salida de empresas a lo largo del tiempo. Los resultados muestran las elasticidades de oferta y demanda de importaciones para un total de 7055 posiciones Nandina. Los valores de las elasticidades son altamente diferenciados entre productos y sectores.

Este documento realiza un analisis detallado de la dispersion del arancel en Colombia, evaluando su evolucion desde la implementacion de la apertura economica en la decada de los noventa, y presenta un marco comparativo de los niveles de dispersion del arancel nacional frente al de los paises de la region. El analisis de la dispersion del arancel en Colombia, junto con los niveles de este en cada uno de los sectores de la economia nacional, serviran de insumo para la estimacion de un arancel menos disperso que permita la incursion de la economia colombiana en las cadenas globales de valor.

RESUMEN: Introducción: La región norponiente del estado de Morelos (RNEM) es reconocida como uno de los territorios más privilegiados de México, con hermosos paisajes naturales y un abanico de barrancas. Este es un espacio rico en ecosistemas, cuya conservación es de gran relevancia para el mantenimiento de los servicios ambientales que estos proveen, como son, la abundante agua superficial y subterránea, la generación de suelos fértiles y microclimas, y el mantenimiento de un ambiente confortable que disfrutan los habitantes de esta región, y que permiten el desarrollo y la calidad de vida actual y futura. Sin embargo, la riqueza natural de la RNEM ha tenido un acelerado deterioro y destrucción durante las últimas décadas como consecuencia del explosivo incremento de la población humana y del desarrollo urbano, agropecuario e industrial, a costa de los ecosistemas naturales, lo que ha ocasionado una gran demanda e incorrecto manejo del recurso hídrico. Al mismo tiempo, ha habido una falta de planificación, gestión y manejo sustentable del agua, del territorio y de los recursos naturales, por parte de las instituciones públicas responsables de estos temas. Para atender esta problemática es necesario entender el funcionamiento integrado de las cuencas en esta región e impulsar acciones estratégicas que contribuyan a la protección del ambiente. Por lo que consideramos prioritario generar una iniciativa en la que, con fundamento en la ecología histórica de las microcuencas, se promueva la participación intersectorial en la planificación y gestión de programas de manejo integral de microcuencas hidrológicas (MICH), que tome como base el conocimiento y las experiencias que se han tenido en otros países, en México y en Morelos en este tema. Para este estudio se seleccionaron dos microcuencas, Chalchihupan y El Pantano, que presentan muchas de las problemáticas que también existen en otras microcuencas de la RNEM. El objetivo de esta tesis fue explorar y entender la evolución histórica de los socio-ecosistemas, del uso del territorio y de los recursos naturales, en dos microcuencas ubicadas en la RNEM, así como combinar los análisis sociohistóricos y funcionales bajo una perspectiva regional para identificar debilidades, soluciones y alternativas y comprender los patrones de gestión de tierras y aguas. En base a este conocimiento, poder explicar los patrones de uso y gestión del agua, la biodiversidad y del territorio, y sustentar propuestas de planificación y manejo integral comunitario de estas microcuencas y de la RNEM. Métodos. El trabajo se desarrolló durante un lapso de 4 años (2015-2018). Las metodologías utilizadas, fueron: Revisión y análisis de información bibliográfica, documental y cartográfica de diversas fuentes, aplicación de entrevistas y talleres con actores clave, uso de SIG, y verificación en campo, para: Investigar la evolución y el funcionamiento actual del sistema territorio-aguabiodiversidad en las dos microcuencas, se analizó la evolución de las estrategias de gestión pública y ciudadana de los sistemas. Se hizo la revisión y análisis de los fundamentos teóricometodológicos del MICH para evaluar y proponer alternativas de manejo de las microcuencas bajo estudio. Resultados: Se establecieron los alcances, enfoques o disciplinas involucradas en el MICH, los aciertos, problemáticas y las propuestas más viables para la planificación y gestión intersectorial de microcuencas. Con base en ello se elaboraron propuestas de mejora al MICH que se puedan aplicar en México y en Morelos en materia de los instrumentos legales, institucionales y de participación ciudadana en los procesos de planificación, manejo y gestión del MICH. Se elaboró el diagnostico biofísico y socioeconómico de las dos microcuencas hidrológicas seleccionadas para este estudio, y se prepararon y consensuaron los programas de manejo de estas microcuencas y de las barrancas de la región norponiente de Morelos. Conclusiones: Para la sostenibilidad del desarrollo en Morelos es estratégico impulsar el MICH, lo cual requiere reformar la legislación y las instituciones responsables del ambiente, e impulsar la participación ciudadana en la planificación, gestión y uso sostenible del territorio, el agua y la biodiversidad.

Wetlands are often vital physical and social components of a country’s natural capital, as well as providers of ecosystem services to local and national communities. We performed a network analysis to prioritize Sustainable Development Goal (SDG) targets for sustainable development in iconic wetlands and wetlandscapes around the world. The analysis was based on the information and perceptions on 45 wetlandscapes worldwide by 49 wetland researchers of the Global Wetland Ecohydrological Network (GWEN). We identified three 2030 Agenda targets of high priority across the wetlandscapes needed to achieve sustainable development: Target 6.3—“Improve water quality”, 2.4—“Sustainable food production”, and 12.2—“Sustainable management of resources”. Moreover, we found specific feedback mechanisms and synergies between SDG targets in the context of wetlands. The most consistent reinforcing interactions were the influence of Target 12.2 on 8.4—“Efficient resource consumption”, and that of Target 6.3 on 12.2. The wetlandscapes could be differentiated in four bundles of distinctive priority SDG-targets: “Basic human needs”, “Sustainable tourism”, “Environmental impact in urban wetlands”, and “Improving and conserving environment”. In general, we find that the SDG groups, targets, and interactions stress that maintaining good water quality and a “wise use” of wetlandscapes are vital to attaining sustainable development within these sensitive ecosystems.