An Investigation on Open-RAN Specifications:Use Cases,Security Threats,Requirements,Discussions

The emergence of various technologies such as terahertz communications,Reconfigurable Intelligent Surfaces(RIS),and AI-powered communication services will burden network operators with rising infrastructure costs.Recently,the Open Radio Access Network(O-RAN)has been introduced as a solution for growing financial and operational burdens in Beyond 5G(B5G)and 6G networks.O-RAN promotes openness and intelligence to overcome the limitations of traditional RANs.By disaggregating conventional Base Band Units(BBUs)into O-RAN Distributed Units(O-DU)and O-RAN Centralized Units(O-CU),O-RAN offers greater flexibility for upgrades and network automation.However,this openness introduces new security challenges compared to traditional RANs.Many existing studies overlook these security requirements of the O-RAN networks.To gain deeper insights into the O-RAN system and security,this paper first provides an overview of the general O-RAN architecture and its diverse use cases relevant to B5G and 6G applications.We then delve into specifications of O-RAN security threats and requirements,aiming to mitigate security vulnerabilities effectively.By providing a comprehensive understanding of O-RAN architecture,use cases,and security considerations,thisworkserves as a valuable resource for future research in O-RAN and its security.

可生物降解塑料取代传统塑料--对碳排放的影响

In recent years,a great deal of attention has been focused on the environmental impact of plastics,includ-ing the carbon emissions related to plastics,which has promoted the application of biodegradable plas-tics.Countries worldwide have shown high interest in replacing traditional plastics with biodegradable plastics.However,no systematic comparison has been conducted on the carbon emissions of biodegrad-able versus traditional plastic products.This study evaluates the carbon emissions of traditional and biodegradable plastic products(BPPs)over four stages and briefly discusses environmental and economic perspectives.Four scenarios-namely,the traditional method,chemical recycling,industrial composting,and anaerobic digestion-are considered for the disposal of waste BPPs(WBPPs).The analysis takes China as a case study.The results show that the carbon emissions of 1000traditional plastic products(plastic bags,lunch boxes,cups,etc.)were52.09-150.36 carbon emissions equivalent of per kilogram(kg CO_(2)eq),with the stage of plastic production contributing 50.71%-50.77%.In comparison,1000 similar BPPs topped out at 21.06-56.86 kg CO_(2)eq,approximately 13.53%-62.19%lower than traditional plastic prod-ucts.The difference was mainly at the stages of plastic production and waste disposal,and the BPPs showed significant carbon reduction potential at the raw material acquisition stage.Waste disposal plays an important role in environmental impact,and composting and anaerobic digestion are considered to be preferable disposal methods for WBPPs.However,the high cost of biodegradable plastics is a challenge for their widespread use.This study has important reference significance for the sustainable development of the biodegradableplastics industry.

Coexistence of liver abscess, hepatic cystic echinococcosis and hepatocellular carcinoma: A case report

BACKGROUND Human cystic echinococcosis(CE)is a life-threatening zoonosis caused by the Echinococcus granulosus(sensu lato).Hepatocellular carcinoma(HCC)is a leading cause of cancer-related mortality in the world.The coexistence of CE and HCC is exceedingly rare,and only several well-documented cases have been reported.In addition to this coexistence,there is no report of the coexistence of CE,HCC,and liver abscess to date.Herein,we aimed to report a case of coexistence of liver abscess,hepatic CE,and HCC.CASE SUMMARY A 65-year-old herdsman presented to the department of interventional therapy with jaundice,right upper abdominal distension and pain for 10 d.Laboratory test showed that he had positive results for HBsAg,HBeAb,HBcAb,and echino-coccosis IgG antibody.The test also showed an increased level of alpha fetopro-tein of 3400 ng/mL.An abdominal computed tomography(CT)scan revealed an uneven enhanced lesion of the liver at the arterial phase with enhancement and was located S4/8 segment of the liver.In addition,CT scan also revealed a mass in the S6 segment of the liver with a thick calcified wall and according to current guideline and medical images,the diagnoses of hepatic CE(CE4 subtype)and HCC were established.Initially,transarterial chemoembolization was performed for HCC.In the follow-up,liver abscess occurred in addition to CE and HCC;thus,percutaneous liver puncture drainage was performed.In the next follow-up,CE and HCC were stable.The liver abscess was completely resolved,and the patient was discharged with no evidence of recurrence.CONCLUSION This is the first reported case on the coexistence of liver abscess,hepatic CE,and HCC.Individualized treatment and multidisciplinary discussions should be performed in this setting.Therefore,treatment and diagnosis should be based on the characteristics of liver abscess,hepatic CE,and HCC,and in future clinical work,it is necessary to be aware of the possibility of this complex composition of liver diseases.

The Global Significance of Contemporary Chinese Outlook on Human Rights

Since the 18^(th)National Congress of the Communist Party of China(CPC),General Secretary Xi Jinping has prioritized the advancement of human rights as a significant aspect of governing the country and has delivered a series of important speeches,instructions,and discussions centered on respecting and protecting human rights,thereby shaping the contemporary Chinese outlook on human rights.

Asia Pacific Regional Young Professional Campaign held in Shenzhen

Jointly supported by the Secretariat of IEC and SAC,the 2024 Asia Pacific Regional Young Professional(APRE YP)Campaign was successfully held in Shenzhen from June 25 to 30.The event was hosted by the Quality and Standards Academy,Shenzhen Technology University(SZTU),guided by the IEC Asia-Pacific Regional Center and the IEC Academy&Capacity Building.The 6-day event included roundtable discussion,theme discussion,expert lectures,business practice,and other activities,which were participated by 27 young experts from Singapore,Malaysia,Thailand,Vietnam,Laos,Myanmar,Cambodia,Russia,and China.

NAVIGATING REGIONAL DYNAMICS--ASEAN’s unwavering path to regional development and stability

From July 21 to 27,Vientiane,the capital of Laos,hosted the 57th ASEAN Foreign Ministers'Meeting(AMM)and related gatherings.Over an intense week,25 ministerial meetings took place,including core ASEAN discussions and dialogues with 11 partner nations.The attendance of representatives from over 30 countries emphasized ASEAN's role as a crucial platform for multilateral engagement.

Consumption and Culturonomics

Lawmakers testify to the power of culture combined with tourism to spur economic growth and enhance the confidence of the nation.“Cultural economics.”That was President Xi Jinping’s thrust in his discussions with fellow deputies to the National People’s Congress(NPC)from Jiangsu Province during last year’s NPC session.Economically developed provinces generally see a cultural boom,he said.“It is worthwhile looking into the reason behind it.”

Promising Signals--High-standard opening up promotes China-ASEAN high-quality cooperation and development

The third plenary session of the 20th Central Committee of the Communist Party of China(CPC)attracted worldwide attention.The meeting facilitated discussions of the future course of China’s economy,which will also influence the development of the global economy.

Celebrating 20 Years of Progress RSPO to release revised global standards for sustainable palm oil

The Roundtable on Sustainable Palm Oil(RSPO)held its annual conference(RT2023)in Jakarta,Indonesia,from November 20 to 22,2023.Themed“Partners for the Next 20,”the meeting highlighted what RSPO’s members and partners have achieved over the last two decades.Nearly a thousand delegates from the global sustainable palm oil industry held discussions on the core challenges facing the industry including mitigating climate change,increasing uptake of certified sustainable palm oil(CSPO),protecting labor rights,and facilitating greater smallholder inclusion in green supply chains through compliance with emerging international regulations.

First Event of CIIS Dialogue Held on Multipolar World and Economic Globalization

On April 26,the first event of CIIS Dialogue was held under the theme of“An Equal and Orderly Multipolar World&A Universally Beneficial and Inclusive Economic Globalization:Implications and the Way Forward.”Officials of international organizations in China and renowned scholars at home and abroad had in-depth discussions on the two major Chinese propositions.

ISO Annual Meeting

The ISO Annual Meeting is the world’s premier event for the international standards community.This year’s event is hosted by ICONTEC,the national standards body of Colombia.With the theme“Breaking boundaries”,this open-to-all event comes at a pivotal time for the world.Over the course of a week,participants will engage in meaningful discussions about the most pressing challenges facing our planet today,while also exploring collaborative standards-based solutions for the future.

Integrating Knowledge and Action

The diplomatic protocol of the Chinese foreign minister beginning a year’s foreign visits in Africa highlights the distinct Chinese characteristics and style in its relations with Africa.For more than 30 years,such visits have allowed Chinese foreign ministers to engage in faceto-face discussions and learn firsthand about the economic and social development in Africa,thereby helping China to deepen its understanding of the continent and adjust its Africa policies.

Finishing first with Monforts at Techtextil 2024

Monforts–which celebrates its 140th anniversary this year–continues to lead the field in finishing and coating technologies for technical textiles.The company is looking forward to many fruitful discussions on the scope of existing and new processes and applications at the forthcoming Techtextil show in Frankfurt from April 23-26.

西藏交通警察道路执法工作的风险与防范

西藏自治区自然、地理与气候环境复杂且特殊,道路交通环境相对恶劣,这导致当地交通警察道路执法工作面临诸多风险,包括警员人身安全和执法效能等风险。对此,文章对西藏交通警察道路执法工作风险进行了调查分析,从地区环境、警员安全意识与技能、执法装备、社会宣传和教育等角度探讨了相关风险的成因,针对性相关风险成因,提出从优化警力配置与道路信息推送、加强警员培训、完善警务装备、加强法治化宣传教育等工作来消除相关风险,以期保障警员安全并改善西藏交通环境。

Ensemble Mean Forecast Skill and Applications with the T213 Ensemble Prediction System

Ensemble forecasting has become the prevailing method in current operational weather forecasting. Although ensemble mean forecast skill has been studied for many ensemble prediction systems（EPSs） and different cases, theoretical analysis regarding ensemble mean forecast skill has rarely been investigated, especially quantitative analysis without any assumptions of ensemble members. This paper investigates fundamental questions about the ensemble mean, such as the advantage of the ensemble mean over individual members, the potential skill of the ensemble mean, and the skill gain of the ensemble mean with increasing ensemble size. The average error coefficient between each pair of ensemble members is the most important factor in ensemble mean forecast skill, which determines the mean-square error of ensemble mean forecasts and the skill gain with increasing ensemble size. More members are useful if the errors of the members have lower correlations with each other, and vice versa. The theoretical investigation in this study is verified by application with the T213 EPS. A typical EPS has an average error coefficient of between 0.5 and 0.8; the 15-member T213 EPS used here reaches a saturation degree of 95%（i.e., maximum 5% skill gain by adding new members with similar skill to the existing members） for 1–10-day lead time predictions, as far as the mean-square error is concerned.

Review of relaying protection sessions in International Conference on Power System Technology in China 1991

There were two sessions and onepanel discussion on relaying pro-tection at the conference,with participantsfrom Australia,Canada,Japan,Korea,arepresentative of the well known relaymanufacturer ABB and from the host coun-try China.The papers presented at thesessions covered a large variety of subjectsrelated to protection,including novel pro-tection principles and schemes。

Discussing the Oil-Control Effects of the North Latitudinal 38° Belt in Central Part of the Ordos Basin

The Ordos Basin in the western part of the North China Craton is commonly believed to be a multi-controlled oil- bearing basin. It is bounded by the Xing＇an--Mongolian Orogen to the north, the Qingling Orogen to the south, the Lüliang mountain to the east and the Helanshan--Liupanshan mountain belt to the west. The interpretation of geophysical data reveals a latitudinal （38°） fault belt in the centre of the Ordos Basin, which controls the hydrocarbon generation, migration and accumulation in the basin. This study attempts to investigate this belt from outcrops and indicates a structurally controlled system of migration fairway within the fault belt.

DISCUSSION ON″THE BOUNDEDNESS AND ASYMPTOTIC BEHAVIOR OR SOLUTION DIFFERENTIAL SYSTEM OF SECOND-ORDER WITH VARIABLE COEFFICIENT" (App1ied Mathematics and Mechanics,Vo1.3,No.4,1982)

After reading the article "The Boundedness and Asymptotic Behavior of Solution of Differential System of Second-Order with Variable Coefficient" in "Applied Mathematics and Mechanics", Vol. 3, No. 4, 1982, we would like to put forward a few points to discuss with the author and the readers. Our opinions are presented as follows:

The electric scheme option for Three Gorges Hydropower Station and the System

EDlTOR’S NOTE: We had published an article on Vol.1, No.1 of this Journal entitled "A study on the schemes of power trons-mission from Three Gorges Project to East China", in which various possible options were discussed from the researcher’s point of view.This paper we present here discusses the same problem but from the planner/designer’s point of view. These different viewpoints aresurely helpful to the final decision of the huge project. We expect some further discussions on this problem to be published on ourJournal.