scholarly journals Comparative Analysis of Long-Term Variation Characteristics of SO2, NO2, and O3 in the Ecological and Economic Zones of the Western Sichuan Plateau, Southwest China

2019 ◽  
Vol 16 (18) ◽  
pp. 3265 ◽  
Author(s):  
Pengguo Zhao ◽  
Jia Liu ◽  
Yu Luo ◽  
Xiuting Wang ◽  
Bolan Li ◽  
...  
Keyword(s):  
Southwest China ◽  
Correlation Coefficients ◽  
Atmospheric Pollutants ◽  
Ecological Zone ◽  
Western Sichuan ◽  
Variation Characteristics ◽  
Economic Zone ◽  
Slight Upward Trend ◽  
Economic Zones

Sulfur dioxide (SO2), nitrogen dioxide (NO2), and ozone (O3) are important atmospheric pollutants that affect air quality. The long-term variations of SO2 and NO2 in 2008–2018 and O3 in 2015–2018 in the relatively less populated ecological and economic zones of Western Sichuan Plateau, Southwest China were analyzed. In 2008–2018, the variations in SO2 and NO2 in the ecological zone were not significant, but Ganzi showed a slight upward trend. SO2 decreased significantly in the economic zone, especially in Panzhihua, where NO2 changes were not obvious. From 2015 to 2018, the concentration of O3 in the ecological zone increased significantly, while the economic zone showed a downward trend. The rising trend of the concentration ratio of SO2 to NO2 in the ecological zone and the declining trend in the economic zone indicate that the energy consumption structure of these two zones is quite different. The lower correlation coefficients between NO2 and O3 in the Western Sichuan Plateau imply that the variations of O3 are mainly affected by the regional background. The effects of meteorological factors on SO2, NO2, and O3 were more obvious in the economic zone where there are high anthropometric emissions.

GEOGRAPHY OF FREE ECONOMIC ZONES:WORLD EXPERIENCE AND UZBEKISTAN

2020 ◽  
Vol 4 (3) ◽  
pp. 40-51
Author(s):  
Shaxzod Ibragimov ◽  
◽  
Quvonchbek Sag`dullayev ◽  
Bibisora Sadibekova
Keyword(s):  
Geographical Location ◽  
Investment Climate ◽  
Natural Conditions ◽  
Economic Relations ◽  
Investment Projects ◽  
Free Economic Zone ◽  
Economic Zone ◽  
Economic Zones

This article describes geographical foundations of free economic zones. Each free economic zone has a unique economic geographical location, natural conditions and resources. These factors play an important role in the development of free economic zones. Various forms of free economic zones in world countries, territorial investment conditions, their level favorableness and investment climate, maintaining foreign economic relations, as well as the development of investment projects are determined by the geographical indicators of free economic zones

scholarly journals Variation Characteristics and Transportation of Aerosol, NO2, SO2, and HCHO in Coastal Cities of Eastern China: Dalian, Qingdao, and Shanghai

2021 ◽  
Vol 13 (5) ◽  
pp. 892
Author(s):  
Xiaomei Li ◽  
Pinhua Xie ◽  
Ang Li ◽  
Jin Xu ◽  
Zhaokun Hu ◽  
...  
Keyword(s):  
Eastern China ◽  
Temporal Distribution ◽  
Correlation Coefficients ◽  
Optical Absorption Spectroscopy ◽  
Near Surface ◽  
Mixing Ratios ◽  
Variation Characteristics ◽  
Spatio Temporal ◽  
Gas Volume ◽  
Transport Flux

This paper studied the method for converting the aerosol extinction to the mass concentration of particulate matter (PM) and obtained the spatio-temporal distribution and transportation of aerosol, nitrogen dioxide (NO2), sulfur dioxide (SO2), and formaldehyde (HCHO) based on multi-axis differential optical absorption spectroscopy (MAX-DOAS) observations in Dalian (38.85°N, 121.36°E), Qingdao (36.35°N, 120.69°E), and Shanghai (31.60°N, 121.80°E) from 2019 to 2020. The PM2.5 measured by the in situ instrument and the PM2.5 simulated by the conversion formula showed a good correlation. The correlation coefficients R were 0.93 (Dalian), 0.90 (Qingdao), and 0.88 (Shanghai). A regular seasonality of the three trace gases is found, but not for aerosols. Considerable amplitudes in the weekly cycles were determined for NO2 and aerosols, but not for SO2 and HCHO. The aerosol profiles were nearly Gaussian, and the shapes of the trace gas profiles were nearly exponential, except for SO2 in Shanghai and HCHO in Qingdao. PM2.5 presented the largest transport flux, followed by NO2 and SO2. The main transport flux was the output flux from inland to sea in spring and winter. The MAX-DOAS and the Copernicus Atmosphere Monitoring Service (CAMS) models’ results were compared. The overestimation of NO2 and SO2 by CAMS is due to its overestimation of near-surface gas volume mixing ratios.

scholarly journals Tracking the global reduction of marine traffic during the COVID-19 pandemic

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
David March ◽  
Kristian Metcalfe ◽  
Joaquin Tintoré ◽  
Brendan J. Godley
Keyword(s):  
Large Scale ◽  
Human Mobility ◽  
Western Mediterranean ◽  
Western Mediterranean Sea ◽  
Marine Traffic ◽  
Human Movements ◽  
Exclusive Economic Zones ◽  
Global Impacts ◽  
Economic Zones

AbstractThe COVID-19 pandemic has resulted in unparalleled global impacts on human mobility. In the ocean, ship-based activities are thought to have been impacted due to severe restrictions on human movements and changes in consumption. Here, we quantify and map global change in marine traffic during the first half of 2020. There were decreases in 70.2% of Exclusive Economic Zones but changes varied spatially and temporally in alignment with confinement measures. Global declines peaked in April, with a reduction in traffic occupancy of 1.4% and decreases found across 54.8% of the sampling units. Passenger vessels presented more marked and longer lasting decreases. A regional assessment in the Western Mediterranean Sea gave further insights regarding the pace of recovery and long-term changes. Our approach provides guidance for large-scale monitoring of the progress and potential effects of COVID-19 on vessel traffic that may subsequently influence the blue economy and ocean health.

scholarly journals The Effectiveness of the Ecological Forest Rangers Policy in Southwest China

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 746
Author(s):  
Yifan Wang ◽  
Dengju Wang ◽  
Rong Zhao
Keyword(s):  
Poverty Alleviation ◽  
Southwest China ◽  
Rural Poverty ◽  
Ecological Effect ◽  
Income Growth ◽  
Future Research ◽  
Linkage Mechanism ◽  
Short Term ◽  
Forest Protection

To achieve the dual goal of poverty alleviation and ecological restoration, the policy of ecological forest rangers (EFRs) was implemented in rural poverty-stricken areas in China, where local residents commonly depend on nearby forest resources for livelihoods. This study aimed to analyze the short-term and long-term effectiveness of the EFRs policy in China mainly in poverty alleviation and income growth, with a brief discussion on the ecological effect of the policy. A questionnaire survey was conducted in four counties in the Karst rocky desertification region in southwest China. By combing through the early literature on REDD+, community forestry, leasehold forestry, etc., this paper summarizes the experience and lessons of similar community forest management models, aiming to explain the unsustainability of EFRs policy from the perspective of forest tenure and governance. The findings of the effectiveness analysis of EFRs policy in the four poverty-stricken counties reflect different degrees of effect in rural households with different income levels. We believe that the EFRs policy has played important roles in short-term regional poverty alleviation while its potential for long-term income growth has not been stimulated. For the amendment of EFRs policy, we put forward the following points: (1) It is necessary to redesign the selection and recruitment mechanism, as well as the exit mechanism of EFRs adapting to the local conditions. (2) It is advisable to further improve the local assessment and monitoring system of forest protection quality of EFRs and optimize the establishment of benefit linkage mechanism between protection effectiveness and EFRs remuneration. (3) The EFRs remuneration standards should be dynamically raised to assure the active participation of EFRs in forest protection. Furthermore, there is a need for one more effective integration model of forest protection and rural livelihoods improvement, which is considered as a potential future research direction.

The WTO Agreement on Subsidies and Countervailing Measures and Unilateralism of Special Economic Zones

2021 ◽  
Author(s):  
Sherzod Shadikhodjaev
Keyword(s):  
World Trade ◽  
Special Economic Zone ◽  
Special Economic Zones ◽  
Economic Activities ◽  
Export Subsidies ◽  
The World ◽  
The Status ◽  
Economic Zone ◽  
A Charge ◽  
Economic Zones

ABSTRACT Many governmental incentives unilaterally offered in special economic zones affect competition in international markets and thus fall within the scope of the World Trade Organization’s Agreement on Subsidies and Countervailing Measures. Until very recently, products made in such zones could face countervailing duty investigations abroad on a charge of improper subsidization. In 2019, the World Trade Organization issued its first ruling focusing on the legality of certain special economic zone subsidies. In particular, the panel in India—Export Related Measures found fiscal preferences under an Indian scheme to be prohibited export subsidies. This article examines the status of special economic zone incentives under the multilateral subsidy regime, discusses the relevant anti-subsidy practice, and identifies ‘risky’ and ‘safe’ types of support measures that constitute unilateralism of zones in promoting economic activities.

Tourism Special Economic Zone

2022 ◽  
Vol 13 (1) ◽  
pp. 0-0
Keyword(s):  
Comparative Study ◽  
Heritage Tourism ◽  
Special Economic Zone ◽  
Mining Activities ◽  
Special Economic Zones ◽  
African Countries ◽  
Economic Zone ◽  
Sustainable Income ◽  
Economic Zones

Tanjung Kelayang is a tourism special economic zones (SEZ) established in Belitung regency, Indonesia, as an alternative and sustainable income to the community after the decline of tin mining. The TSEZ is focusing on rural and heritage tourism although mining activities are actively and continuously conducted. SEZs have been successful in some countries; however, India, China, and African countries have experienced less success in several aspects. The TSEZ offers some benefits but is vulnerable to external shock, since it was not developed based on a comprehensive design, and is associated with horizontal conflicts. This study reviewed Tanjung Kelayang's TSEZ policy based on SEZ implementation in various countries as a comparative study by adjusting the context of the phenomena occurring in Tanjung Kelayang. This research produced a review related to the TSEZ’s design, facilities, rules and regulations, also efforts to overcome horizontal conflicts.

scholarly journals Long-term stability of maxillary anterior alignment in non-extraction cases

2013 ◽  
Vol 18 (3) ◽  
pp. 46-53 ◽  
Author(s):  
Luiz Filiphe Gonçalves Canuto ◽  
Marcos Roberto de Freitas ◽  
Karina Maria Salvatore de Freitas ◽  
Rodrigo Hermont Cançado ◽  
Leniana Santos Neves
Keyword(s):  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Term Stability ◽  
Long Term Stability ◽  
Irregularity Index ◽  
Posttreatment Period ◽  
Fixed Appliances ◽  
Maxillary Incisors ◽  
Dental Cast

OBJECTIVE: The purpose of this retrospective study was to evaluate long-term stability of maxillary incisors alignment in cases submitted to non-extraction orthodontic treatment. METHODS: The sample comprised 23 patients (13 female; 10 male) at a mean initial age of 13.36 years (SD = 1.81 years), treated with fixed appliances. Dental cast measurements were obtained at three different time points (T1 - pretreatment, T2 - posttreatment and T3 - long-term posttreatment). Variables assessed in maxillary arch were Little Irregularity Index, intercanine, interpremolar and intermolar widths, arch length and perimeter. The statistical analysis was performed by one-way ANOVA and Tukey tests when necessary. Pearson' correlation coefficients were used to investigate possible associations between the evaluated variables. RESULTS: There was no significant change in most arch dimension measurements during and after treatment, however, during the long-term posttreatment period, it was observed a significant maxillary incisors crowding relapse. CONCLUSION: The maxillary incisors irregularity increased significantly (1.52 mm) during long-term posttreatment. None of the studied clinical factors demonstrated to be predictive of the maxillary crowding relapse.

scholarly journals Influence of Macrotexture and Microtexture on the Skid Resistance of Aggregates

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Bowen Guan ◽  
Jiayu Wu ◽  
Chao Xie ◽  
Jianhong Fang ◽  
Haile Zheng ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
Correlation Analysis ◽  
Surface Treatment ◽  
Critical Point ◽  
Friction Surface ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Skid Resistance ◽  
Mean Square

This article intends to study the influence of macrotexture and microtexture on the skid resistance of four types of aggregates. For this purpose, fractal dimension (D), root mean square height (Rq), and Polished Stone Value (PSV) were tested. The Pearson correlation coefficients between PSV and D or Rq in the interval of different polishing cycles were calculated and analyzed with correlation analysis. The relationships between PSV and Rq were also established. The results showed that the PSV development was approximately divided into 3 stages including accelerated attenuation stage, decelerated attenuation stage, and stabilization stage. There is a critical point of the entire polishing cycles. When the number of the polishing cycles exceeds this critical point, microtexture replaces macrotexture to play a major role in the skid resistance of aggregates. In the accelerated attenuation stage, macrotexture plays a major role in the skid resistance of aggregates. In the decelerated attenuation stage and stabilization stage, microtexture gradually plays a major role in the skid resistance of aggregates. Because of roughest microtexture in the stabilization stage, bauxite can provide the highest levels of skid resistance for high friction surface treatment over the long-term period.

scholarly journals Effect of climatic factors on the dynamics of radial increments of Norway spruce, European beech and sessile oak

2011 ◽  
Vol 57 (No. 7) ◽  
pp. 293-302 ◽  
Author(s):  
P. Petráš ◽  
J. Mecko
Keyword(s):  
Norway Spruce ◽  
Annual Ring ◽  
Climatic Factors ◽  
Correlation Coefficients ◽  
European Beech ◽  
Vegetation Period ◽  
Monthly Precipitation ◽  
Sessile Oak ◽  
Fagus Sylvatica L

Correlations of increment indexes with average monthly temperatures and total monthly precipitation were studied on annual ring series of 455 trees of Norway spruce (Picea abies [L.] Karst.), sessile oak (Quercus petrea Liebl.) and European beech (Fagus sylvatica L.). Data on precipitation from the period 1901–2005 and on temperatures from the period 1931–2005 were used. Statistically significant dependences with correlation coefficients in the range of 0.2–0.5 were confirmed. All tree species react positively to precipitation mainly in June and July. An increase in precipitation by 1 mm when compared with the long-term average results in an increase in increment index of spruce almost by 0.13%. This index in oak and beech increases only by a half value of the value for spruce. Precipitation from the second half of the vegetation period of the previous year is also important. Higher temperatures during the vegetation period affect increment changes mostly negatively. With temperature increase by 1°C, when compared with the long-term average, the increment index of trees decreases by about 1–2%.

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