scholarly journals The effect of illegal mining activities on vegetation: A case study of Bontefufuo Area in the Amansie West District of Ghana

2020 ◽  
Author(s):  
Richard Amankwah Kuffour ◽  
Benjamin Benjamin M. Tiimub ◽  
Isaac Manu ◽  
Wellington Owusu
Keyword(s):  
Vegetation Cover ◽  
Carbon Dioxide Concentration ◽  
Small Scale ◽  
Photographic Images ◽  
Illegal Mining ◽  
Global Concern ◽  
The Mean ◽  
Vegetation Loss ◽  
The Relationship

Abstract Background: The destruction of vegetation cover is among the main factors contributing to climate variation. The study investigated the distribution of trees, shrubs and herbs in the mined and unmined communities of Bontefufuo namely: Esaase, Manhyia, Aboabo and Mpatuam. The research was intended to determine the relationship between the spatial distribution of vegetation, composition and examine the effects of vegetation loss in the area. A total of forty 40 plots (10 m x 10 m) were studied. In each community, five (5) plots were studied each for mined and unmined areas. Results: The mean numbers of plant population were determined and analyzed using ANOVA. There were significant differences among the tree, shrub and herb populations at P < 0.05. The number of shrubs and trees population was reduced in the mined areas in relation to the areas that are not mined. Herbs were overwhelming within the mined regions and were found to be much higher than within the unmined regions. Photographic images showed that the practices of illicit small-scale mining contributed to land destruction by compacting the topsoil and accumulation of laterites. Conclusion: Climate change issues still remain a global concern and vegetation cover which plays an imperative role in regulating the carbon dioxide concentration of the atmosphere should be restored.

scholarly journals Challenging Teachers’ Pedagogic Practice and Assumptions about Social Media

2017 ◽  
Vol 21 (2) ◽  
Author(s):  
Helen C. Cartner ◽  
Julia L. Hallas
Keyword(s):  
Professional Development ◽  
Social Media ◽  
Online Course ◽  
Small Scale ◽  
Pedagogical Practice ◽  
Critical Reasoning ◽  
Professional Development For Teachers ◽  
Effective Technology ◽  
The Relationship

This article describes an innovative approach to professional development designed to challenge teachers’ pedagogic practice and assumptions about educational technologies such as social media. Developing effective technology-related professional development for teachers can be a challenge for institutions and facilitators who provide this support. To contend with this challenge, we drew on Bain’s (2004) “baker’s dozen” questions to guide the design of an online postgraduate course for teachers. This article discusses the design of the online course and what teachers came to understand about the relationship between social media and teaching as a result of completing the course activities. This small-scale case study utilised qualitative data from three cohorts of participating teachers and found that teachers do change their pedagogical practice and assumptions about social media for their own teaching contexts when they engage in course activities that challenge their existing mental models and encourage critical reasoning and reflection on learning.

Brooklyn's agrarian questions

2014 ◽  
Vol 30 (1) ◽  
pp. 92-102 ◽  
Author(s):  
Evan Weissman
Keyword(s):  
New York ◽  
Urban Agriculture ◽  
Food Justice ◽  
Small Scale ◽  
Food Network ◽  
Alternative Food Network ◽  
The Usa ◽  
The Relationship ◽  
The City

AbstractThroughout the USA, urban agriculture is expanding as a manifestation of an emerging American food politics. Through a case study of Brooklyn, New York, I used mixed qualitative research methods to investigate the political possibilities of urban agriculture for fostering food justice. My findings build on the existing alternative food network (AFN) literature by indicating that problematic contradictions rooted in the neoliberalization of urban agriculture limit the transformative possibilities of farming the city as currently practiced in Brooklyn. I suggest that longstanding agrarian questions—concerns over the relationship between agriculture and capitalism and the politics of small-scale producers—are informative for critical interrogation of urban agriculture as a politicization of food.

As Seen on TV: Putting the NBC Opera on Stage

2018 ◽  
Vol 71 (3) ◽  
pp. 595-654 ◽  
Author(s):  
Danielle Ward-Griffin
Keyword(s):  
Twentieth Century ◽  
Small Scale ◽  
Television Watching ◽  
New Model ◽  
The 1950S ◽  
La Traviata ◽  
The Relationship ◽  
Opera Houses

This article examines the relationship between opera on television and opera on the stage in America in the 1950s and 1960s. Using the NBC Opera (1949–64) as a case study, I trace both what television borrowed from the operatic stage and what television sought to bring to the stage in a relationship envisioned by producers as symbiotic. Focusing on the NBC's short-lived touring arm, which produced live performances of Madam Butterfly, The Marriage of Figaro, and La traviata for communities across America in 1956–57, I draw upon archival evidence to show how these small-scale stage productions were recalibrated to suit a television-watching public. Instead of relying on the stylized presentation and grand gestures typical of major opera houses, the NBC touring performances blended intimate television aesthetics with Broadway typecasting and naturalistic direction. Looking beyond the NBC Opera, I also offer a new model for understanding multimedial transfer in opera, one in which the production style of early television opera did not simply respond to the exigencies of the screen, but rather sought to transform the stage into a more intimate—and supposedly more accessible—medium in the mid-twentieth century.

scholarly journals The effects of ionization feedback on star formation: a case study of the M 16 H II region

2019 ◽  
Vol 627 ◽  
pp. A27 ◽  
Author(s):  
Jin-Long Xu ◽  
Annie Zavagno ◽  
Naiping Yu ◽  
Xiao-Lan Liu ◽  
Ye Xu ◽  
...  
Keyword(s):  
Star Formation ◽  
Large Scale ◽  
Young Stellar Objects ◽  
Ionized Gas ◽  
Stellar Objects ◽  
Multi Wavelength ◽  
The Mean ◽  
The Impact ◽  
The Relationship

Aims. We aim to investigate the impact of the ionized radiation from the M 16 H II region on the surrounding molecular cloud and on its hosted star formation. Methods. To present comprehensive multi-wavelength observations towards the M 16 H II region, we used new CO data and existing infrared, optical, and submillimeter data. The 12CO J = 1−0, 13CO J = 1−0, and C18O J = 1−0 data were obtained with the Purple Mountain Observatory (PMO) 13.7 m radio telescope. To trace massive clumps and extract young stellar objects (YSOs) associated with the M 16 H II region, we used the ATLASGAL and GLIMPSE I catalogs, respectively. Results. From CO data, we discern a large-scale filament with three velocity components. Because these three components overlap with each other in both velocity and space, the filament may be made of three layers. The M 16 ionized gas interacts with the large-scale filament and has reshaped its structure. In the large-scale filament, we find 51 compact cores from the ATLASGAL catalog, 20 of them being quiescent. The mean excitation temperature of these cores is 22.5 K, while this is 22.2 K for the quiescent cores. This high temperature observed for the quiescent cores suggests that the cores may be heated by M 16 and do not experience internal heating from sources in the cores. Through the relationship between the mass and radius of these cores, we obtain that 45% of all the cores are massive enough to potentially form massive stars. Compared with the thermal motion, the turbulence created by the nonthermal motion is responsible for the core formation. For the pillars observed towards M 16, the H II region may give rise to the strong turbulence.

scholarly journals Relationships between the Number and Power of Hungarian Household-Sized Photovoltaic Power Plants and Selected Indicators of the Settlements: A Case Study

Processes ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 4
Author(s):  
Nóra Hegedűsné Baranyai ◽  
Henrik Zsiborács ◽  
András Vincze ◽  
Nóra Rodek ◽  
Martina Makai ◽  
...  
Keyword(s):  
Power Plants ◽  
Small Scale ◽  
Significant Relationships ◽  
Photovoltaic Power ◽  
Almost Everywhere ◽  
Pairwise Correlations ◽  
Service Areas ◽  
Complex Indicators ◽  
The Relationship

In the global transformation of energy systems, solar energy plays a prominent role, since the energy from our star is a limitless and clean resource, which is available practically almost everywhere. In spite of the immense advancements of photovoltaic systems, which utilize this source of energy, no in-depth research has been carried out regarding the present Hungarian status of the small-scale photovoltaic power plants, the most common type of solar power plant in Hungary. The novelty of this study is that it examines the number and power of these small-scale power plants at the settlement level within the service areas of the various distribution companies, by also considering the economic and infrastructural dimensions of the settlements. The paper seeks answers to the questions whether there are any significant relationships between the number and the power of power plants of this type and the indicators of the settlements, and if so, how strong they are. Besides pairwise correlations, the study also involved the analysis of the relationship between the ranking of the settlements based on the settlements’ complex indicators that were created from the settlements’ indicators and the ranking of the settlements according to the number and power of household-sized photovoltaic power plants per 1000 people. In the course of exploring the relationships, a regression model was also devised concerning the number of household-sized photovoltaic power plants and the settlement indicators.

scholarly journals Muscle Activity and Morphology in Slalom Skiing by a Single-Leg Amputee Ski Racer: A Case Study of a Paralympic Athlete

2021 ◽  
pp. 500-5007
Author(s):  
Yusuke Ishige ◽  
Shinsuke Yoshioka ◽  
Noriko Hakamada ◽  
Yuki Inaba
Keyword(s):  
Muscle Activity ◽  
Elite Athlete ◽  
Vastus Lateralis ◽  
Biceps Femoris ◽  
Cross Sectional ◽  
Measurement Units ◽  
The Mean ◽  
The Right ◽  
The Relationship

The aim of this study was to clarify the characteristics of skiing by a single-leg amputee ski racer from the viewpoints of muscle activity, morphology, and the relationship between both elements through comparisons with those of a non-disabled ski racer. One elite athlete, classified as LW2 (left thigh amputation), and one non-disabled athlete, as a control, participated in this study. The cross-sectional area of thigh muscles was measured through magnetic resonance imaging. Additionally, muscle activities and joint and segment kinematics during slalom skiing were measured using electromyography and inertial measurement units, respectively. The muscle activities and joint kinematics of the amputee racer in the turn in which he performed with the inside edge of the ski were similar to those of the outside leg of the non-disabled racer over a turn. In contrast, at the turn in which the amputee racer performed with the outside edge (more difficult side), the amputee racer largely activated the biceps femoris (BF) in the first half of the turn compared to the non-disabled racer. The reason could be to control the angular momentum of the trunk during the forward tilting motion. This is because a greater activity of the BF was observed during the period in which the forward tilt of the trunk was increased, and the mean activity of the BF was the greatest during the first half of the right turn in which the range of the motion of the forward tilt was the greatest. In terms of muscle morphology of the amputee racer, a significant hypertrophy of the BF and vastus lateralis was observed compared to the non-disabled racers. The well-developed BF was considered to be related to the large activity during the turn performed with the outside edge of the ski.

scholarly journals La variabilidad de la frecuencia cardiaca en el control del entrenamiento en un corredor de Ironman. Estudio de caso (Heart Rate Varibility in the training monitoring of an Ironman runner. A case study)

Retos ◽  
2019 ◽  
pp. 339-343
Author(s):  
Claudio Nieto-Jimenez ◽  
José Ruso-Álvarez ◽  
Elena Elena Pardos-Mainer ◽  
José Naranjo Orellana
Keyword(s):  
Heart Rate ◽  
Sympathetic Activity ◽  
Training Load ◽  
Moderate Increase ◽  
Load Planning ◽  
Training Methodology ◽  
The Mean ◽  
Stress Score ◽  
The Relationship

El objetivo de este artículo es el de proporcionar información sobre la carga de entrenamiento a partir del seguimiento de un atleta durante siete meses de preparación para una competición de Ironman (3.8 km de natación, 180 km de ciclismo y 42.195 km de carrera), utilizando una metodología de entrenamiento con registros diarios de variabilidad de la frecuencia cardiaca (VFC). Como variable para evaluar la actividad parasimpática se calculó la raíz cuadrada de la media de las diferencias de la suma de los cuadrados entre intervalos RR adyacentes (RMSSD) y el índice de estrés (SS) como indicador de actividad simpática. En los meses dos, tres y cuatro presentó un moderado incremento del SS (d =1,17) paralelamente a una moderada disminución de la RMSSD (d = -1,04). Para los meses cinco, seis, y siete se observó una pequeña disminución del SS (d = -0,23) y moderado aumento de la RMSSD (d = 1,08). Como concusión es que las mediciones de VFC de cinco minutos al despertar parecen ser una forma útil de monitorizar el estado de equilibrio parasimpático en un triatleta antes de abordar las sesiones de entrenamiento. El análisis de esta monitorización serviría para detectar precozmente posibles estados de fatiga y para poder modificar, en caso necesario, la planificación de las cargas de entrenamiento en la preparación para una competición de Ironman.  Summary. The objective of this article is to provide information on the relationship between external (TL) and internal training load (ITL) from the tracking of an athlete during seven months of preparation for an Ironman competition (3.8 km of swimming, 180 km of cycling, and 42,195 km of running), using a training methodology with daily records of the heart rate variability (HRV). As a variable to assess parasympathetic activity, the square root of the mean of the differences in the sum of the squares between adjacent RR intervals (RMSSD) was calculated, together with the stress score (SS) as an indicator of sympathetic activity. In months two, three and four, there was a moderate increase in SS (d = 1.17) parallel to a moderate decrease in RMSSD (d = -1.04). In months five, six, and seven, a small decrease in SS (d = -0.23) and a moderate increase in RMSSD (d = 1.08) were observed. As a conclusion, the five-minute HRV measurements upon awakening appear to be a useful tool to monitor the state of parasympathetic equilibrium in a triathlete before approaching training sessions. The analysis of this monitoring would serve to detect possible fatigue states in the early stages and to modify, if necessary, the training load planning in preparation for an Ironman competition.

Uncertainty and Control in Russia

2013 ◽  
Author(s):  
Jacob N. Shapiro
Keyword(s):  
Northern Ireland ◽  
Organizational Dynamics ◽  
Small Scale ◽  
Secret Police ◽  
Terrorist Organizations ◽  
Terrorist Groups ◽  
History Of ◽  
And Control ◽  
The Relationship

This chapter analyzes the organization of pre-Revolutionary Russian terrorist groups in the 1880s and 1900s. Understanding these groups is useful in many ways. First, and most important, many of the organizational pathologies of terrorism are starkly illustrated by the travails of what were really the first modern terrorist organizations. Second, comparing these groups offers an opportunity to test hypotheses about the relationship between uncertainty and control. Third, the history of these groups is extremely well developed, in part because the archives of the Tsarist secret police were preserved, giving historians a rich set of investigative and interrogation reports to work with. Finally, the scale of violence in Russia was much greater than in Northern Ireland or Palestine. Examining this case thus complements the al-Qa'ida in Iraq case study in confirming that organizational dynamics described in preceding chapters are not unique to small-scale conflicts.

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