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1 |
Tracking the northern seasonal cap retreat of mars using computer vision
ردیابی عقب نشینی کلاهک فصلی شمالی مریخ با استفاده از بینایی کامپیوتر-2022 Using polar stereographic images from the Mars Color Imager (MARCI), we use Python
to autonomously track the Northern Polar Seasonal Cap (NPSC) recession from Mars Years (MY)
29 to MY 35 between Ls = 10° and Ls = 70°. We outline the cap and find an ellipse of best fit. We
then compare our results to previously published recession rates, that were manually tracked,
and find them to be consistent. Our process benefits from being automated, which increases
the speed of tracking and allows us to monitor the recession with higher Ls fidelity than past
studies. We find that most MYs have a local minimum recession rate at Ls = ~32° and a local
maximum at Ls = ~51°. We also find that MY 30 experiences a rapid latitude increasing event
that involves ~1° Ls of a rapid increase and ~5° Ls of slower recession, which then increases
above the interannual average rate. We interpret this to be the result of a major sublimation
driven by off-polar winds. We also discover divergent effects in the recession and size of the
NPSC following the MY 28 and MY 35 global dust storms. MY 29’s cap is significantly smaller
and retreats slower than the multi-year average, whereas MY 35’s cap is slighter larger and
retreats very close to the average. We hypothesize that the diverging behavior of the caps in
post-storm years can be a result of the differences in the date of onset and the duration of the
storms.
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مقاله انگلیسی |
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A two-stage multi-objective second generation biodiesel supply chain design considering social sustainability: A case study
یک طرح زنجیره تأمین بیودیزل چند مرحله ای چند مرحله ای با توجه به پایداری اجتماعی: یک مطالعه موردی-2021 Undesirable environmental impacts caused by fossil fuel consumption have motivated governments to focus on biofuels production. Therefore, in our paper, we design a multi-objective biodiesel supply chain from Jatropha, which includes biomass cultivation center, pretreatment, and oil extraction center, bio- refinery, and demand zone. In our study, a two-stage approach presented, which first specifies candidate locations for biomass cultivation with a common weight data envelopment analysis (CWDEA) method and then strategic and tactical decisions were made by a mathematical model. The presented multi- objective model focuses on cost minimization, besides social benefits and environmental impacts maximization while a life cycle assessment approach is used to model social indicators. The capability of the model is validated by proposing a case study of Iran and the augmented ε-constraint method is employed to reach a trade-off between three pillars of sustainability while managerial insights are provided by employing a Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method for the optimal solution selection. Models results and sensitivity analysis on key parameters, specify the best locations for Jatropha Curcas L. (JCL) cultivation and facility construction as well as an optimal value of supply chain variables, which finally proves that Iran has a high potential for biodiesel production from JCL that leads improving balanced socio-economic development in this country.© 2021 Elsevier Ltd. All rights reserved. Keywords: Biodiesel supply chain design | Jatropha | Multi-objectives optimization | CWDEA | TOPSIS | Social responsibility |
مقاله انگلیسی |
3 |
The Reinvented accounting firm office: Impression management for efficiency, client relations and cost control
اداره حسابداری مجتمع: مدیریت تصفیه برای بهره وری، روابط مشتری و کنترل هزینه-2021 The office has become a large scale organisational phenomenon accommodating large numbers of
organisational employees most often housed in open plan and Activity Based Working settings that
arguably resemble the new factory. This study examines contemporary Big 4 accounting firm office
design innovations and their representation with a view to eliciting their claimed rationales, reflections
of historical office design and management thinking, and apparent strategic agendas with respect to
office efficiency, client relations and cost control involved in their offering of professional services. In
doing so, it also explores the implications that public practice firms office design may have for auditor
independence and audit quality. Informed by Goffmans theories of impression management, the study
employs historical and website analysis, finding a predominant firm focus on office efficiency and client
relations with an undercurrent of cost reduction and revenue enhancement aspirations. While represented as innovative current office design and work pattern developments, public practice accounting
firm office innovations and intentions are found to significantly reflect historical office design and
management thinking, with dramaturgical circumspection of floor designs and props oriented towards
creating front stage performances predesigned for clients impression management. Where backstage
redesign and frame breaking does not produce desired employee performance changes, some signs of
retreating to more traditional floor redesign and territorial marker usage are evident. The study also
signals the potential for innovative accounting firm office designs to carry some significant impacts upon
audit independence and audit quality.
keywords: بزرگ 4 حسابداری | مدیون | طرح باز | از امکان پذیر است | روابط مشتری | کنترل هزینه | استقلال حسابرسی | کیفیت حسابرسی | Big 4 accounting firms | ABW | Open plan office | Office efficiency | Client relations | Cost control | Audit independence | Audit quality |
مقاله انگلیسی |
4 |
Performance assessment of institutional photovoltaic based energy system for operating as a micro-grid
ارزیابی عملکرد سیستم انرژی مبتنی بر فتوولتائیک سازمانی برای کارکرد به عنوان یک میکرو شبکه-2020 A building integrated photovoltaic (PV) system with energy storage within an institution may need appropriate
coordination among distributed energy sources (DERs). It is required to have an appropriate energy management
strategy to improve system performance as well as to operate it as a micro-grid during the grid outage condition.
In this paper, TERI’s (India) Retreat Facility’s energy system has been used, and its performance with a distributed
generator has been assessed with operational strategies for fulfilling the institutional load demand in
coordination with the PV, grid and battery storage; and with possibility of operating it as a micro-grid during the
grid outage period too. The energy management techniques have been proposed for minimizing the energy cost
of locally generated electricity with maximization of PV contribution and battery energy throughput to meet the
institutional load demand. It has been observed that the effective coordination of DERs with the battery energy
storage can contribute in fulfilling the institutional essential load, and to supply the total load during the grid
outage conditions. The presented results are going to be useful for techno-economic analysis of sustainable
energy systems for minimizing the energy cost and to operate it as a micro-grid. Keywords: Solar photovoltaic (PV) systems | Building integrated photovoltaic (BIPV) system | Battery energy throughput | Techno-economics of energy system |
مقاله انگلیسی |
5 |
Construction of various nanostructures on carbon nanotube films
ساخت انواع نانوساختارها بر روی فیلم های نانولوله کربنی-2020 Construction of nanostructures on surfaces has appealed intensive attention due to its significant applications
in diverse fields. Especially, engineering surface properties via surficial nanostructures is
actually the creation of functional interface-based materials and slated to be the key aspect for the future
of materials science. Although many efforts have been made, there are only a few reports about the
construction of nanostructures on carbon nanotube film surfaces. The big challenge for constructing on
carbon films is that these carbon assemblies are easy to be dispersed by immersion in a chemical solution.
Here, in this paper, we have shown for the first time the fabrication of different kinds of nanostructures,
i.e. nanoneedles, nanoparticles, nanospirals, on carbon nanotube films by using facile and
cheap electrodeposition method and precise physical deposition method. We pretreat the films by an
electrical method to strengthen the films to avoid dispersion during the electrodeposition process. These
composite films are still very flexible after coating with nanostructures. Compared with those precise
physical deposition methods, the facile electrodeposition method is more suitable for constructing
nanostructures on carbon nanotube films, due to the low requirement for planeness of films. It is
interesting to find that these nanostructures can endow superhydrophobicity or higher conductivity for
these flexible composite films, which greatly broaden the potential applications for carbon nanotube
films in the fields of battery, moisture self-cleaning, electrostatic energy harvesting, and enhancing
condensation heat transfer for more efficiency of energy utilization, environmental, and thermal
management Keywords: Arrays of nanostructures | Nano films | Superhydrophobicity | Environmental and energy management |
مقاله انگلیسی |
6 |
Evaluating erosion management strategies in Waikiki, Hawaii
ارزیابی استراتژی های مدیریت فرسایش در Waikiki ، هاوایی-2020 Waikiki is an internationally recognized tourist destination and a major source of economic activity in Hawaii.
Erosion is a constant threat to Waikiki’s beaches and coastal properties. This applied study presents an assessment
and comparison of three erosion management approaches – beach nourishment, armoring and managed
retreat – in the context of Waikiki. A geographic information system (GIS) is used to project erosion rates to 2050
and 2100, while approximating effects of sea level rise (SLR). The spatial extent of erosion and costs of each
management approach are estimated. Suitability of each approach is evaluated based on management impacts to
economy, environment, recreation, storm protection, and resources. This framework provides a comparative
analysis that can be replicated in similar settings. The findings indicate that nourishment may be a beneficial and
economical approach to manage erosion in this densely developed, economically significant beach setting.
Nourishment costs are on the same order of magnitude as armoring, while retreat costs are an order of magnitude
higher. The larger indirect impacts and economic losses associated with armoring (beach loss) and retreat
(property loss) make nourishment the least impactful option for addressing erosion in Waikiki. As the projections
and understanding of climate change impacts improve, solutions may evolve. Nourishment may provide a noregrets,
suitable approach for managing erosion in Waikiki until other solutions emerge. This paper presents
opportunities and implications of nourishment for planning and future research in Waikiki. Keywords: Coastal erosion | Erosion management | Coastal planning | Sea level rise |
مقاله انگلیسی |
7 |
The two-speed coastal climate adaptation economy in Australia
اقتصاد سازگار با آب و هوای ساحلی دو سرعته در استرالیا-2020 There is increasing global concern that climate adaptation efforts are falling behind the increasing risks associated with climate change. A number of reviews have identified this general issue in multiple nations and jurisdictions. In Australia, it is argued here that adaptation of the coastal built environment is operating at two speeds: the two-speed adaptation economy. Large civil assets and facilities in Australia now mostly have adaptation plans and strategies in place; although progress in actual on-the-ground implementation is variable in some cases. By contrast, adaptation of coastal communities and settlements continues at a very slow pace with very few specific adaptation measures being implemented that were not already being implemented as business as usual for flood or erosion management. The reasons for these differences in adaptation progress is investigated here. A key outcome of the thinking presented here is the reinforcement of the result that adaptation of coastal communities is not a challenge of relocating buildings, but rather a challenge of incentivising and supporting communities to act. Keywords: Climate change | Coastal adaptation | Vulnerability | Coastal retreat |
مقاله انگلیسی |
8 |
Financial deglobalisation in banking?
تبعید مالی در بانکداری؟-2019 This paper argues that the decline in cross-border banking since 2007 does not amount to a
broad-based retreat in international lending (‘‘financial deglobalisation”). We show that
BIS international banking data organised by the nationality of reporting banks provide a
clearer picture of international financial integration than the traditional ‘‘residence”, or
balance-of-payments, view. They show that what appears to be a global shrinkage of bank
positions is actually driven by European banks. These banks uniquely responded to credit
losses after 2007 by shedding assets abroad to restore capital ratios. Other banking systems’
global footprints, notably those of Japanese, Canadian and even US banks, have
expanded since 2007. Using a global dataset of banks’ affiliates (branches and subsidiaries),
we demonstrate that the who (i.e., bank nationality) accounts for more of the peak-totrough
shrinkage in foreign claims than does the where (i.e., locational factors). We relate
bank nationality in turn to EU membership, which may reflect asset shrinkage required by
the EU competition authorities in response to state aid, bank profitability and credit losses. Keywords: Financial globalisation | International banking | Consolidation | Bank nationality | Ownership |
مقاله انگلیسی |
9 |
Rapid identification and quantification of Panax notoginseng with its adulterants by near infrared spectroscopy combined with chemometrics
شناسایی سریع و اندازه گیری Panax notoginseng با زاینده های آن توسط طیف سنجی مادون قرمز نزدیک به همراه شیمی سنجی-2019 Traditional methods for identification of Panax notoginseng (PN) such as high performance liquid chromatography
(HPLC) and gas chromatography (GC) are time-consuming, laborious and difficult to realize rapid and online
analysis. In this research, the feasibility of identification and quantification of PN with rhizoma curcumae (RC),
Curcuma longa (CL) and rhizoma alpiniae offcinarum (RAO) are investigated by using near infrared (NIR) spectroscopy
combinedwith chemometrics. Five chemical pattern recognitionmethods including hierarchical cluster
analysis (HCA), partial least squares-discriminant analysis (PLS-DA), artificial neural networks (ANN), support
vector machine (SVM) and extreme learning machine (ELM) are used to build identification model of the dataset
with 109 samples of PN and its three adulterants. Then seven datasets of binary, ternary and quaternary adulterations
of PN are designed, respectively. Five multivariate calibration methods, i.e., principal component regression
(PCR), support vector regression (SVR), partial least squares regression (PLSR), ANN and ELM are used to
build quantitativemodel and compared for each dataset, separately. Finally, in order to further improve the prediction
accuracy, SG smoothing, 1st derivative, 2nd derivative, continuous wavelet transform (CWT), standard
normal variate (SNV), multiple scatter correction (MSC) and their combinations are investigated. Results show
that PLS-DA and SVMcan achieve 100% classification accuracy for identification of 109 PN with its three adulterants.
PLSR is an optimal calibration method by comprehensive consideration of prediction accuracy, over-fitting
and efficiency for the quantitative analysis of seven adulterated datasets. Furthermore, the predictive ability of
the PLSRmodel for PNcontents can be improved obvious by pretreating the spectra by the optimal preprocessing
method, with correlation coefficients of which all higher than 0.99. Keywords: Panax notoginseng | Adulteration | Near infrared spectroscopy | Chemical pattern recognition | Multivariate calibration | Preprocessing |
مقاله انگلیسی |
10 |
Fourier transform infrared spectroscopy and chemometrics for the discrimination of paper relic types
تبدیل فوریه طیف سنجی مادون قرمز و کمومتریکس برای تشخیص انواع کاغذ یادگاری-2019 The paper relic identification is a pending issue to be resolved in the field of cultural heritage. As we all known,
heritage paper has significant importance in archaeological research. Nowadays, there are a variety of research
methodologies focuses on the analysis of inks for dating documents.While the paper analysis attained little attention.
This work is to explore the non-destructive application of ATR-FTIR technique in discrimination of
paper relics. 15 types of paper spectra were collected by ATR-FTIR, which wavenumber range were range from
4000 to 650 cm−1. And the moving average smoothing and normalization was used for pretreatment analysis.
Five different classification algorithms, principal component analysis-linear discriminant analysis (PCA-LDA),
partial least squares discriminant analysis (PLS-DA), soft independent modeling of class analogy (SIMCA), least
squares-support vectormachine (LS-SVM), partial least squares-linear discriminant analysis (PLS-LDA) were selected
to classify the types of paper. PLS-LDA and LS-SVM are effective techniques with 100% classification accuracy.
PCA-LDA, PLS-DA and SIMCA give accuracy of 98.67%, 97.33% and 95.56%, respectively. The present
experiment suggested that ATR-FTIR combining with chemometrics will be highly useful in paper identification
of cultural heritage. Keywords: Pattern recognition | ATR-FTIR | Paper relics | LS-SVM | PLS-LDA |
مقاله انگلیسی |