Reducing Computational and Communication Complexity for Dynamic Provable Data Possession

Nowadays, an increasing number of persons choose to outsource their computing demands and storage demands to the Cloud. In order to ensure the integrity of the data in the untrusted Cloud, especially the dynamic files which can be updated online, we propose an improved dynamic provable data possession model. We use some homomorphic tags to verify the integrity of the file and use some hash values generated by some secret values and tags to prevent replay attack and forgery attack. Compared with previous works, our proposal reduces the computational and communication complexity from O(logn) to O(1). We did some experiments to ensure this improvement and extended the model to file sharing situation.

Blockchain-Based Light-Weighted Provable Data Possession for Low Performance Devices

Provable Data Possession(PDP)schemes have long been proposed to solve problem of how to check the integrity of data stored in cloud service without downloading.However,with the emerging of network consisting of low performance devices such as Internet of Things,we find that there are still two obstacles for applying PDP schemes.The first one is the heavy computation overhead in generating tags for data blocks,which is essential for setting up any PDP scheme.The other one is how to resist collusion attacks from third party auditors with any possible entities participating the auditing.In this paper,we propose a novel blockchain-based light-weighted PDP scheme for low performance devices,with an instance deployed on a cloud server.We design a secure outsourced tag generating method for low performance devices,which enables a kind of“hash-sign-switch”two-phase tag computing.With this method,users with low performance devices can employ third party auditors to compute modular exponential operations that accounts for the largest portion of computation overhead in tag generation,without leaking their data content.Chaincodes in blockchain network ensure the correctness of such outsourcing and prevent collusion attacks.The security analysis and performance evaluation prove that our scheme is both secure and efficient.

A Novel Provable Data Possession Scheme Based on Geographic Location Attribute

Increment of mobile cloud video motivates mobile users to utilize cloud storage service to address their demands, cloud storage provider always furnish a location-independent platform for managing user＇s data. However, mobile users wonder if their cloud video data leakage or dynamic migration to illegal service providers. In this paper, we design a novel provable data possession protocol based on data geographic location attribute, which allows data owner to auditing the integrity of their video data, which put forward an ideal choice for remote data possession checking in the mobile cloud storage. In our proposed scheme, we check out whether the video data dynamic migrate to an unspecified location （such as： overseas） by adding data geographic location attribute tag into provable data possession protocol. Moreover, we make sure the security of our proposed scheme under the Computational Diffic-Hellman assumption. The analysis and experiment results demonstrate that our proposed scheme is provably secure and efficient.

On the Reason of Changes of Chinese Possession Institution——from the Perspective of Historical Institutionalism

It is the important part of historical institutionalism to explore the reason of the changes of institutions,which includes key issues of historical institutionalism—why do institutions change?How do institutions play a new role through changing?As far as the reason of the changes is concerned,there are social reasons,economic reasons,technological reasons as well as concept reasons.Being part of the China’s civil law system,the possession institution unexceptionally experiences changing process of establishment,amendment,reform and innovation.This paper attempts to analyze the reason of the changes of the possession institution from the perspective of institutional change theory of the historical institutionalism,giving historical explanation of institutional changes and putting forward historical interpretation and support for the perfection of the contemporary possession institution.

Possessions Ceded for the Benefit of the Hospitals and Churches From the Sighisoara County

Transilvania is a province of the actual state of Romania, geographically situated in the middle of the country, in the inner arch of the Carpathians. Starting with the 10th century, the territory of Transilvania became attractive for the neighboring Hungarian royalty and later on, in the 1 lth century it was annexed into Hungary. For a better control of the newly annexed territory and in order to convert the orthodox population to Catholicism, the Hungarian rulers brought the Szeklers to Transilvania and two centuries later, German originating populations, from Rhine, Luxemburg, and Saxony （the name of Sas people, or Saxon of Transilvania derives from ＂Saxony＂）. The aim of this paper is to focus on the Sighisoara County, namely on the easement of certain areas for temporary or permanent maintenance or use by the church and hospitals in the region. That was a common practice in Medieval Europe aimed at ensuring the survival means for these institutions. However, it was not the only one to serve this goal. There were also donations on behalf of various people or allocations of money by the county authorities. The documents attesting this are unpublished, unedited and are to be found in the archives of the Brasov County, Budapest, and Vienna. They are the stepping stone of this paper and hence, they grant its originality. The objectives of the paper are to bring arguments in favor of the thesis that community money was directed towards meeting the needs of the hospitals, as well as towards supporting the widows, the orphans, and the needy ones. Worth noting in this respect is the management of the funds ceded to the church and county hospitals and that actually benefitted the whole community. Moreover, the paper also emphasizes the role played by education, since the latter is an important landmark for a community＇s development level

The Enclosed Personal Space and Female Identity Construction in A. S. Byatt's Possession

From the perspective of feminism, by analyzing single intellectual women's living states in enclosed personal spaces, andcomparing their different spatial changes triggered by external intrusions, this essay intends to explore Byatt's ambivalent attitudestowards the feminists' pursuit for a room of one's own, and point out the significance of harmonious co-existence between men andwomen to female identity construction.

Analysis of bona fide acquisition under possession reformulation

The system of bona fide acquisition of movables is a very important system in civil law since modem times. However, in modem society, the further development of concept delivery makes the phenomenon of separation between possession and ownership become more and more universal. There is a potential conflict between possession reform and the announcement of property right of property as a sign of delivery, which has been brought up again in civil law circles. Based on the measure of interest and value analysis, on the possession case of bona fide acquisition system is discussed and reflection, in under the bona fide possession of the application, the modified say. With a view to China＇ s ongoing property rights legislation to benefit.

Paradise Archetype in Possession

A.S.Byatt's Possession has its own appraisal of public and critic alike for its original structure, as well as for the novelty and complexity of its themes. With Northrop Frye's archetypal criticism, this paper analyzes the epic poems"The Garden of Proserpina"so as to identify the hidden creation theme from paradise archetype.

The Quest Motif in Possession

The author of the paper analyzes the story"Glass Coffin"in A. S. Byatt's Possession and compares it with Brothers Grimm's fairy tale with the same name. Through the study, the author identifies the quest motif from our modern hero's discovery journey in Possession.

Human Lives Are More Valuable Than Material Possessions——My Reflections on "Face to Face with Hurricane Camille"

“Face to face With Hurricane Camilleisa Piece of narration writ-ten by Joseph P.Blank.It has been adopted by text-book compilers of various countries ever since its first publication in The Readers Digest,March1970.A Searlyas1973,Nat-aliC.

Mixed-ownership Reform:Private Firms’Role in Targeted Poverty Alleviation-A Perspective on Resource Complementarity and Check&Balance

Targeted poverty alleviation(TPA)serves as a winning formula for fighting poverty and has generated valuable experiences for achieving common prosperity.The mixed-ownership reform has enhanced corporate economic performance.However,further testing is required to assess whether enterprises contribute to the improvement of distribution by participating in TPA.Taking A-share-listed private enterprises between 2016 and 2021 as research samples,we conducted an investigation into the extent and manner in which the mixed-ownership reform contributes to TPA.Our research reveals that a higher proportion of state capital equity participation is correlated with a greater level of private enterprises’contribution to TPA.This indicates that the mixed-ownership reform is beneficial for prompting private enterprises to shoulder responsibilities for building a society of common prosperity.As shown by the mechanism test,state capital equity participation encourages private enterprises to contribute to TPA primarily by alleviating corporate financing constraints through the resource complementarity effect.In contrast,the check&balance effect of promoting corporate poverty alleviation by mitigating the principal-agent problem has not yet been significantly demonstrated.Regarding the poverty alleviation model,state capital equity participation prompts private enterprises to contribute to TPA through industrial development,educational investment,and environmental protection,emphasizing a combination of providing external assistance and cultivating endogenous development capacity.In terms of TPA regions,state capital equity participation plays a significant role in supporting economically less-developed regions,regions with high unemployment rates,and central and western regions.This paper provides new empirical evidence for deepening mixed-ownership reforms and advancing common prosperity.

The Impact of Short Selling Disclosure Regulatory Constraint on the Lending Market and Stock Ownership

We examine the impact of the short sell disclosure(SSD)regime on the stock lending market and investor behaviors,employing a staggered difference-indifference(DiD)methodology.Our research reveals that the introduction of the disclosure regime enhances market transparency,resulting in a diminished appeal of stock ownership in the lending market for active investors.This shift is accompanied by a reduction in information leakage risks and longer loan durations.Specifically,our analysis reveals a significant decrease in the risk of loan recall by 4.87%,accompanied by an average increase of 23.72%in loan duration for short selling activities.Furthermore,the cost associated with short-sell disclosure causes a decline in both lending supply and short demand.

Property Attribute and Property Ownership of Virtual Property

Virtual property has increasingly become a key issue,particularly regarding its nature,ownership,and goodwill acquisition,all of which are worthy of study.Analyzing these issues can contribute to a better understanding of how to develop laws and regulations to protect virtual property.

Research on Mixed Ownership Reform of State-Owned Enterprises from the Perspective of Marxist Political Economy

Under China’s socialist system,state-owned enterprises are key forces driving the economic trajectory and providing strong momentum.These enterprises not only bear the crucial responsibility of advancing the process of national modernization but also serve as the core of the national economic lifeline through their irreplaceable status and function amidst changing times.In the new era,with the advent of the technological revolution and the wave of globalization,state-owned enterprises face unprecedented opportunities and challenges.As a significant aspect of state-owned enterprise reform,the mixed ownership reform is not only a transformation in the structure of enterprise ownership but also a reflection of China’s broader,comprehensive reform efforts.By deeply advancing this reform,it will help optimize the allocation of state-owned assets and significantly boost technological and management innovation within state-owned enterprises,ensuring their competitiveness in the intense market environment.Therefore,this paper will conduct an in-depth analysis of the mixed ownership reform of state-owned enterprises from the perspective of Marxist political economy.

Modeling household car ownership using ordered logistic regression model

Considering both the discrete and ordered nature of the household car ownership an ordered logistic regression model to predict household car ownership is established by using the data of Nanjing Household Travel Survey in the year 2012. The model results show that some household characteristics such as the number of driver licenses household income and home location are significant.Yet the intersection density indicating the street patterns of home location and the dummy near the subway and the bus stop density indicating the transit accessibility of home location are insignificant.The model estimation obtains a good γ2 the goodness of fit of the model and the model validation also shows a good performance in prediction.The marginal effects of all the significant explanatory variables are calculated to quantify the odds change in the household car ownership following a one-unit change in the explanatory variables.

Corporate Governance, Ownership and Financial Distress of Publicly Listed Companies in China

This paper examines the effects of internal control mechanisms on the financial distress of publicly listed companies in China. Using t-test and Logistic regression analysis, we investigated the following aspects: ownership by top managers and the CEO, the number of directors, the percentage of inside directors, CEO duality, and ownership concentration. The empirical tests indicate a lower probability of financial distress when ownership by top managers and that by the CEO are higher. The evidence also shows that a combination of two parts, the CEO and the chairman of the board, may influence the internal control system of a publicly listed companies.

Impact of Enterprise Ownership and Size on Registered Hematotoxicity in Benzene-exposed Workers

Benzene is a classified as ahuman carcinogen that can cause myelodysplastic syndrome and acute myelogenousleukemia;.This compound is also a potent toxin suppressing the bone marrow.Accordingly,benzene causes serious hematological adverse effects,such as pancytopenia and aplastic

Support Vector Machine Prediction Modeling for Automobile Ownership

To address some inherent defects of artificial neural networks, such as insufficient generalization performance, local extremum problem, and dimensional catastrophe problem, a support vector machine was proposed and applied to the modeling of automobile ownership prediction. By analyzing the data on automobile ownership and its influencing factors, the learning sample couples for automobile ownership prediction modeling were constructed, and support vector machine (SVM) was used to regression the nonlinear function relation of automobile ownership prediction model, and the established automobile ownership prediction model was used to predict the automobile ownership in different years. To reduce the impact on the accuracy of automobile ownership prediction caused by the large order of magnitude difference between the data of automobile ownership and its influence factors, the normalization method was used to pre-process the automobile ownership and its influence factors, and the inverse normalization was used to process the automobile ownership prediction results. The comparison between the automobile ownership prediction results and the statistical results shows that the automobile ownership prediction model has good generalization performance, and the support vector machine is an effective method to model the automobile ownership prediction.

SOE Ownership Diversification and Environmental Performance

Based on the panel data of China's 34 industrial sectors during 2005-2013, this paper tests the water pollution effects of SOE ownership diversification in China. The result shows that in general, greater state ownership and less private ownership in a sector will lead to lower water pollution intensity. Test of threshold effect shows that, irrespective of its current level, an increase in state ownership helps improve the environment by different degrees. When pollution intensity is low, ownership diversification helps reduce pollution intensity; when pollution intensity is high, state ownership is the optimal choice for mitigating pollution. This paper's findings suggest that while advancing the mixedownership reform of SOEs, China cannot relax the environmental responsibilities of SOEs, and still less should economic interests override environmental concerns.

Research on Financial Performance of State-owned Enterprise Mixed Ownership Reform

Mixed ownership is an important form of realization of China＇s economic system reform and development, and it is also the main direction of state-owned enterprise reform. In order to further promote the deepening of the reform of mixed ownership, this paper randomly selects 200 listed state-owned enterprises as research objects, and studies the trends of the financial performance of these enterprises from the mixed state-owned enterprises and non-mixed-modification enterprises in the five years from 2013 to 2017, and compares their various trends. Financial indicators, a comprehensive evaluation of the problems and causes in the reform of the mixed ownership system, and then propose countermeasures to further deepen the reform of mixed ownership based on the research conclusions.