Asia-Oceania Region Research Articles

A Diagnostic Guide for Orange Rust Disease in Sugarcane

Puccinia kuehnii is an important airborne fungal pathogen of sugarcane, causing orange rust disease. P. kuehnii has been present in the Asia–Oceania region for over a century. The first report of this pathogen in the Western Hemisphere was in 2007, when it appeared in Florida, U.S.A. The main objective of this diagnostic guide is to provide detailed information about symptoms and signs of sugarcane orange rust as well as taxonomy, geographic distribution, isolation, identification, and storage of P. kuehnii. We also highlight the management strategies used in recent years to control this devastating fungal disease. This diagnostic guide will help facilitate future research focusing on fungal isolation procedures, genetics, and population studies of this pathogen.

Women in Science and Mathematics in Japan and Asia-Oceania

The current landscape of women’s participation in STEM in Japan and the broader Asia-Oceania region still exhibits gender disparities. Despite high academic performance in STEM among Japanese students, a persistently low percentage of women pursue advanced STEM degrees, particularly PhDs in mathematics, where Japan ranks among the lowest globally. To address this gap, Japan and other countries have implemented various initiatives, such as STEM outreach programs, affirmative actions, and policy recommendations from advisory bodies like the Science Council of Japan and for mathematics in particular, associations of women mathematicians in the different continents.. Additionally, the newly established Asian and Oceanian Women in Mathematics (AOWM) organization seeks to support and promote women in mathematics through networking, mentoring, and collaborative events. The AOWM has also encouraged its members to strengthen their organizations and address/resolve the gender bias in their home countries.

EVALUATION OF THE PERFORMANCE OF MULTI-GNSS ADVANCED ORBIT AND CLOCK AUGMENTATION – PRECISE POINT POSITIONING (MADOCA-PPP) IN JAPAN REGION

For users of Precise Point Positioning (PPP), Multi-GNSS Advanced Orbit and Clock Augmentation PPP signals provide corrective data. When using the PPP approach and/or PPP-Ambiguity Resolution (AR) method, the QZSS signal provides globally applicable error corrections on satellite orbit, clock offset, and code/phase biases. In addition, from FY2024, as a part of the MADOCA-PPP technology demonstration, wide-area ionospheric correction data will be provided for the Asia-Oceania region. A software estimator of precise satellite information developed by JAXA, Multi-GNSS Advanced Demonstration Tool for Orbit and Clock Analysis (MADOCA), allows u-blox CO99-ZED-F9P and MSJ 3008-GM4-QZS utilizing MADOCA-PPP to be used in GNSS applications that need sub-decimetre precision but don’t have to be expensive. Errors caused by positioning satellites are computed by using observation data from domestic and overseas GNSS monitoring station networks such as IGS and MIRAI, and obtained correction data is transmitted from QZSS signal to provide highly precise positioning augmentation services that can be used in the Asia-Oceania Region. Users may utilize the PPP technique for high-precision locating by employing a GNSS receiver that supports the QZSS signals. This paper describes an experiment carried out with the static method to combine GPS, GLONASS, and QZSS signals in the project site (ISHI, USUD and MIZU stations in Japan). This paper examines the GPS/GLONASS/QZSS obtainable accuracy. These obtained results indicate that integrating GPS system with GLONASS and QZSS is favoured for surveying applications. It appears that integrating GPS/GLONASS/QZSS (MADOCA precise ephemeris file) static measurements in the study area between 0–4 millimetres accuracy can be guaranteed on all occasions.

Discussion of thermal activation on heat collection plate of sprinkler heads

Heat collection plates (HCP) are installed above sprinkler heads in some tall halls in the Asia-Oceania region to give faster thermal actuation. In this study, experiments were thus conducted in a fire chamber to determine thermal activation times of sprinkler heads with and without HCP. Three HCP with different diameters were selected and tested with pendent fast response liquid-in-bulb sprinkler heads. A total of 48 sprinklers heads were studied under different conditions of height and pool fire size. The HCP was found to reduce sprinkler activation time in a fire chamber test by up to 61%. Thermal activation time of sprinkler heads was also investigated by the common plunge test in a wind tunnel. Results indicate that activation was delayed by 5%, 18%, and 221% on average by the three HCP. An HCP of pie plate shape with small diameter would alter the physical scenario of heating up the heat sensing element of sprinkler heads assumed in the plunge test. Therefore, the effect of HCP cannot be appropriately assessed in a wind tunnel.

11th Asia Oceania Human Proteome Organization Congress Report

As the first in-person Asia-Oceania Human Proteomics Organization (AOHUPO) congress since 2018, the 11th AOHUPO congress was an opportune time for the research community to reconnect, and to renew friendships after the long period of restricted travel due to the global pandemic. Moreover, this congress was a great opportunity for the many AO regional proteomics and mass spectrometry scientists to meet in Singapore to exchange ideas and to present their latest findings. Co-hosted by the Singapore Society for Mass Spectrometry (SSMS) and the Malaysian Proteomics Society (MAPS), and held in conjunction with the 7th Asia-Oceania Agricultural Proteomics Organisation (AOAPO) Congress and SSMS 2023, the meeting featured both human and agricultural proteomics. Over five hundred scientists from the AO region converged on the MAX Atria @ Singapore EXPO, Changi, Singapore from May 8-10 for the main congress. The diverse program was made up of 64 invited speakers and panellists for 7 plenary lectures, 27 concurrent symposia, pre- and post-congress workshops, and 174 poster presentations. The AOHUPO society were able to celebrate not only their 20th anniversary, but also the outstanding academic research from biological and agricultural proteomics and related 'omics fields being conducted across the Asia-Oceania region.

The Risk Contagion between Chinese and Mature Stock Markets: Evidence from a Markov-Switching Mixed-Clayton Copula Model

Exploring the risk spillover between Chinese and mature stock markets is a promising topic. In this study, we propose a Markov-switching mixed-Clayton (Ms-M-Clayton) copula model that combines a state transition mechanism with a weighted mixed-Clayton copula. It is applied to investigate the dynamic risk dependence between Chinese and mature stock markets in the Americas, Europe, and Asia-Oceania regions. Additionally, the conditional value at risk (CoVaR) is applied to analyze the risk spillovers between these markets. The empirical results demonstrate that there is mainly a time-varying but stable positive risk dependence structure between Chinese and mature stock markets, where the upside and downside risk correlations are asymmetric. Moreover, the risk contagion primarily spills over from mature stock markets to the Chinese stock market, and the downside effect is stronger. Finally, the risk contagion from Asia-Oceania to China is weaker than that from Europe and the Americas. The study provides insights into the risk association between emerging markets, represented by China, and mature stock markets in major regions. It is significant for investors and risk managers, enabling them to avoid investment risks and prevent risk contagion.

Trends of LIS Education and Practice in Asia and Oceania: A Bibliometric Analysis

Abstract: This paper identifies the trend of LIS education and practice in the Asia-Oceania region in four areas, namely LIS research, LIS education, library technologies, and library services. A bibliometric analysis was carried out based on the publications indexed by Scopus, ranging from 1979 to 2021. India, China, Iran, and Australia rank the highest for number of publications within the four focus areas and areas of bibliometrics, research productivity, text mining, and big data are frequently being studied recently. Within the past five years, the LIS education sector has been concerned with the quality of LIS education programs and integration of information and communication technology (ICT) in the education delivery. Meanwhile, library technology adoption and services are seeing a positive move toward enhancing the user experience via the latest technology enhancements, such as green technology initiatives, artificial intelligence, and augmented reality apps. Although several studies have reported on the trends in LIS fields, scarcely any research has been carried out in the area of LIS education and practices as a whole, particularly focusing on Asia and Oceania. This study elucidates the most recent trends of LIS education and practices, including all recent innovations and explorations within the specific areas analyzed in the study.

Nepal on the IFLA Library Map of the World

IFLA’s Library Map of the World, launched in response to the need to accurately collect and share basic data and information about the library landscape in each country, has grown into a powerful advocacy tool providing access to country-level library statistics from more than 130 countries in the world, full country profiles describing the library field in each country, and SDG stories about impactful library programmes contributing to the Sustainable Development Goals.
 Nepal has engaged in the LMW project with library data covering all library types and a full country profile containing information about the library environment in Nepal, including organisations and institutions in the library field, policy and legislation documents, and information about education and events for library professionals. Nepal's presence can be strengthened by adding SDG stories highlighting the contribution that libraries around the country are making to the country’s development.
 During the last five years since Nepal joined the LMW project, the country has demonstrated an increase in its data availability that is higher as the regional average in Asia-Oceania region. The article outlines the benefits to the library field in Nepal from its involvement and visibility in this project and offers suggestions for using high-quality library data to demonstrate the value libraries bring to their communities and achievement of the country’s development goals.

Upgrading of fire safety requirement for tall buildings in Bulgaria and proposal of implementing fire safety management under facility management

PurposeThe purpose of this paper is to check and fill the gap between the existing fire safety regulations for newly built tall buildings in Bulgaria and those in areas with rapid economic growth in the Asia-Oceania regions like the Hong Kong Special Administrative Region and Mainland China, by making comparative analysis and identifying good practices. The main focus is on the development of fire safety designs, facilities and management, which shall be recognized as essential parts of facility management in tall buildings.Design/methodology/approachBulgarian regulations are analyzed and then compared with those in the Hong Kong Special Administrative Region and Mainland China. In addition, the scientific aspect of fire load density in the fire codes is discussed. The possibility of implementing a fire engineering approach to supplement prescriptive codes is outlined. The essential roles of fire safety management and fire safety culture are presented.FindingsKey points and recommendations that are worthy for discussion about incorporation in the Bulgarian tall buildings fire safety requirements are upgraded requirements for fire load density, detection and sprinkler systems in tall residential buildings, refuge floors, ventilation/air conditioning control systems, full-scale burning tests and fire engineering approach. The importance of fire safety management is emphasized as a main, key component in facility management.Originality/valueThe research is the first study focusing on implementation of additional and specific fire safety regulations for tall buildings in Bulgaria.

Mapping the spatio-temporal dynamics of global mangrove crabs to reveal its status and challenges: A bibliometric evaluation of research output during 1980–2016

Crabs are the most dominant groups in mangrove ecosystem and play a vital role in building and sustaining the structure and function of the mangrove ecosystems. However, a systematic evaluation of global research status of mangrove crabs is still lacking. Here, a bibliometric analysis based on the Science Citation Index Expanded (SCI-E) was carried out to provide insights into research activities, tendencies, and challenges of the mangrove crabs from 1980 to 2016. The results showed that the average annual output of the publications was low. Brazil took a leading position out of the 63 countries/territories with the largest number of publications, followed by USA, Australia, China, and Germany. Journal of Experimental Marine Biology and Ecology was the most popular journal. The reproductive ecology (e.g., reproduction), population ecology (e.g., population structure), and their relationship were the mainstream. The estuarine ecosystem and the method of stable isotope received ecologists’ favor. Behavioral ecology (e.g., bioturbation), ecosystem function (e.g., carbon), and the ecological effect among them were the main issues in this field. Biodiversity was a new hot topic. Brazil, Australia, USA, China, and Kenya were the top five hot regions among the 53 hot countries on a global scale. Different regions have different hot topics. The breeding ecology was the most popular theme in the Americas region, the ecological effects of crabs were the most hotstops in the Africa-East Asia region and the East and South Asia-Oceania region. The challenges of the development were not comprehensive and uneven on a global scale. There was a certain number of countries with mangrove distributions were still outside this field, such as most of the western and northeastern countries of Africa (e.g., Angola), some Central American countries (e.g., Guatemala), and some western and southeast Asian countries (e.g., Cambodia). Furthermore, we found that some topics were ignored or lagged in each territory. Our results highlight that the global research status of mangrove crab is still at a relatively backward stage, and regional development is extremely unbalanced.

Rebuilding Post-Pandemic Societies: Editorial Section

INDONESIAN SCHOLARS SCIENTIFIC SUMMIT (I3S) 2021 & OISAA ASIA-OCEANIA SYMPOSIUM 2021
 DefinitionIndonesian Scholars Scientific Summit (I3S) 2021 is a scientific conference involving Indonesian scholars who currently work or study in Taiwan and outside of Taiwan, such as Indonesia and other countries. 
 This event is conducted by Perhimpunan Pelajar Indonesia (PPI) Taiwan, which is the Overseas Indonesian Student’s Association Alliance in Taiwan, in collaboration with Perhimpunan Pelajar Indonesia Dunia Kawasan (PPIDK) Asia-Oceania or the Overseas Indonesian Student’s Association Alliance for Asia-Oceania Region, who have their annual symposium in 2021. These two associations are referred to as PPI Taiwan and OISAA Asia-Oceania, throughout this conference. 
 The joint event of I3S 2021 and the OISAA Asia-Oceania Symposium 2021 is scheduled to be conducted on June 21-27, 2021 and being hosted by PPI Taiwan. The main event is taking place on June 25-27, 2021 which is prompted by four days of pre-event series on June 21-23, 2021.
 BackgroundDated back on December 31, 2019, the World Health Organization (WHO) received a notification of pneumonia disease, whose source was unidentified, in Wuhan, China. Then, the disease which was caused by the SARS-CoV-2 virus was referred by WHO as COVID-19. The COVID-19 was designated by WHO as a pandemic on March 11, 2020. Furthermore, by January 29, 2021, as many as 102.6 million cases of COVID-19 worldwide with more than 2.2 million deaths have been reported by WHO. Globally, five countries experiencing the highest number of COVID-19 positive cases are the United States, India, Brazil, Russia and Great Britain.
 The COVID-19 pandemic has caused not only casualties but also opens up opportunities, among others are in the fields of technology, education and health. In the field of technology, we can observe the increasing use of technology for distance or remote education and the utilization of Artificial Intelligence (AI) in various fields including health. In the health sector, technology related to telemedicine and vaccines has also begun to develop. There has also been an expectation that within the post- COVID-19 period, the novel ideas keep developing, and Indonesia can take an active role in developing this.
 Regarding the aforementioned situation, the establishment of the 2021 Indonesian Scholar Scientific Summit (I3S 2021) is expected to serve as a scientific forum for exchanging ideas among scientists, students and industry practitioners in all relevant fields in order to generate innovative ideas that can be developed in the post-COVID-19 pandemic situation.
 Objectives
 
 To promote the development of scientific ideas from and among the participants and speakers.
 To disseminate new knowledge to the participants, committees, and speakers.
 To establish a network among the participants, committees, and speakers.
 To increase awareness on current issues related to the conference’s theme.

Visibility Anomaly of GNSS Satellite and Support from Regional Systems

In a multi-GNSS (global navigation satellite system) environment with operational GPS, GLONASS and Galileo Satellites, the Asia–Oceania region is expected to get better benefits of a large number of GNSS satellites for use. However, it is witnessed that during some parts of the day, no GNSS satellite is present above 60° elevation angle from many parts of the earth, including India. Real-time data from India show the regular absence of usable GPS satellites above 60° elevation angles during some parts of the day; addition of GLONASS and Galileo satellites does not improve the situation much. From Burdwan, West Bengal, India at least twice a day, no GNSS satellite is found above 60° elevation angles for more than 30 min. Simulation study for scattered places of India and data from IGS Centres confirm similar observations, except for the extreme northern region. The global scenario also supports these observations, while the individual operator’s country is free from the problem using their own navigational system. The consequences of the problem affect GNSS-based solutions; for locations with obstruction of GNSS signals from low elevation angles, the concurrent occurrence of this incidence poses a threat for seamless GNSS-based navigation through intermittent loss of solution and degraded solution quality. Regional navigation satellite systems (RNSS) help mitigate this problem within the respective service regions. For a large part of the globe, the problem may be allayed using GNSS–RNSS hybrid operation. The result would be important for location-specific GNSS mission planning in strategic, life and safety-critical applications.

Multi-criteria decision analysis to evaluate foot and mouth disease control strategies with the perspectives of Chief Veterinary Officers in the Asia-Oceania region.

The objective of this study was to evaluate the effectiveness of foot and mouth disease (FMD) control strategies using multi-criteria decision analysis (MCDA). The FMD control strategies were evaluated for epidemiological, economic and social-environmental criteria, accounting for the preferences of Chief Veterinary Officers (CVOs) from the Asia-Oceania region, with the preferences quantified using a questionnaire study. Previously reported simulation results of an FMD epidemic were used to measure the epidemiological effectiveness of FMD control strategies. The simulated FMD epidemic results, such as the number of infected farms, the duration of the epidemic and the outbreak area, were compared for a number of FMD control strategies. Based on previous simulation and economic modelling results and incorporating a literature search to quantify the social and environmental outcomes of an FMD outbreak, MCDA analysis was conducted to evaluate control strategies. According to the overall score in the MCDA results, an FMD control strategy which consisted of a 3-km radius of pre-emptive slaughter, 100 days of movement restriction and vaccinating all FMD-susceptible animals (baseline strategy) was the preferred strategy, with the highest overall score of 62.99. In contrast, the same duration of movement restriction and vaccination strategy with a 0.5-km radius of pre-emptive slaughter was least preferred, with the lowest overall score of 37.05. The evaluation of the FMD control strategies presented here using MCDA has provided scientific evidence for selecting an appropriate baseline FMD control strategy, based on the preferences of CVOs.

Numerical studies on explosion hazards of vehicles using clean fuel in short vehicular tunnels

Short vehicular tunnels (SVT) with heavy traffic are commonly constructed in urban areas of densely populated cities of the Asia-Oceania Region. The introduction of vehicles using clean fuel poses new concerns on the fire safety of existing road tunnels. The explosion of a taxi using Liquefied Petroleum Gas (LPG) occurred in a garage, alarming the need for protecting existing road tunnels against hazards in using clean energy.In this paper, explosion hazards of an LPG taxi in a section of SVT were studied by using Computational Fluid Dynamics (CFD) Flame Acceleration Simulator (FLACS). The scenario of LPG leaking into the concealed space beneath the tunnel floor level of SVT through vents at the road side is simulated. A full tank of LPG would completely be released in about 231 s. The leaked LPG in the concealed space is ignited 19 s after the complete release, i.e. at t = 250 s. Predicted results on explosion pressure and temperature illustrate that appropriate protection measures should be provided to ensure the safety of SVT. Results also suggest that the existing fire safety codes for SVT should be revised by including an explosion analysis of LPG taxis.

Performance Analysis of the Korean Positioning System Using Observation Simulation

The Korean government has a plan to build a new regional satellite navigation system called the Korean Positioning System (KPS). The initial KPS constellation is designed to consist of seven satellites, which include three geostationary Earth orbit (GEO) satellites and four inclined geosynchronous orbit (IGSO) satellites. KPS will provide an independent positioning, navigation, and timing (PNT) service in the Asia-Oceania region and can also be compatible with GPS. In the simulation for KPS, we employ 24 GPS as designed initially and 7 KPS satellites. Compared to the true orbit that we simulated, the averaged root mean square (RMS) values of orbit-only signal-in-space ranging errors (SISRE) are approximately 4.3 and 3.9 cm for KPS GEO and IGSO. Two different positioning solutions are analyzed to demonstrate the KPS performance. KPS standard point positioning (SPP) errors in the service area are about 4.7, 3.9, and 7.1 m for east (E), north (N), and up (U) components, respectively. The combined KPS+GPS SPP accuracy can be improved by 25.0%, 31.8%, and 35.0% compared to GPS in E, N, and U components. The averaged position errors for KPS kinematic precise point positioning (KPPP) are less than 10 cm. In the fringe of the KPS service area, however, the position RMS errors can reach about 40 cm. Unlike KPS, GPS solutions show high positioning accuracy in the KPS service area. The combined KPS+GPS can be improved by 28.7%, 27.1%, and 30.5% compared to GPS in E, N, and U components, respectively. It is noted that KPS can provide better performance with GPS in the Asia-Oceania region.

Development of Land Surface Albedo Algorithm for the GK-2A/AMI Instrument

The Korea Meteorological Administration successfully launched Korea’s next-generation meteorological satellite, Geo-KOMPSAT-2A (GK-2A), on 5 December 2018. It belongs to the new generation of GEO (Geostationary Elevation Orbit) satellite which offers capabilities to disseminate high spatial- (0.5–2 km) and high temporal-resolution (10 min) observations over a broad area, herein a geographic disk encompassing the Asia–Oceania region. The targeted objective is to enhance our understanding of climate change, owing to a bulk of coherent observations. For such, we developed an algorithm to map the land surface albedo (LSA), which is a major Essential Climate Variable (ECV). The retrieval algorithm devoted to GK-2A/Advanced Meteorological Imager (AMI) data considered Japan’s Himawari-8/Advanced Himawari Imager (AHI) data for prototyping, as this latter owns similar specifications to AMI. Our proposed algorithm is decomposed in three major steps: atmospheric correction, bidirectional reflectance distribution function (BRDF) modeling and angular integration, and narrow-to-broadband conversion. To perform BRDF modeling, the optimization method using normalized reflectance was applied, which improved the quality of BRDF modeling results, particularly when the number of observations was less than 15. A quality assessment was performed to compare our results to those of Moderate Resolution Imaging Spectroradiometer (MODIS) LSA products and ground measurement from Aerosol Robotic Network (AERONET) sites, Australian and New Zealand flux tower network (OzFlux) site and the Korea Flux Network (KoFlux) site from throughout 2017. Our results show dependable spatial and temporal consistency with MODIS broadband LSA data, and rapid changes in LSA due to snowfall and snow melting were well expressed in the temporal profile of our results. Our outcomes also show good agreement with the ground measurements from AERONET, OzFlux and KoFlux ground-based network with root mean square errors (RMSE) of 0.0223 and 0.0306, respectively, which is close to the accuracy of MODIS broadband LSA. Moreover, our results reveal still more reliable LSA products even when clouds are frequently present, such as during the summer monsoon season. It shows that our results are useful for continuous LSA monitoring.

Clinical burden associated with postsurgical complications in major cardiac surgeries in Asia-Oceania countries: A systematic review and meta-analysis.

Evidence on the burden of postsurgical complications is mainly from studies in western countries, and little is highlighted in the Asia-Oceania region. This study aimed to identify and compare the burden of postsurgical complications in major cardiac surgeries in Asia-Oceania countries. A systematic search was performed in PubMed, Embase, and CENTRAL between January 2000 and July 2018. Inclusion criteria were: (a) observational studies or randomized control trials; (b) studied in coronary artery bypass graft (CABG) and/or heart valve procedures; (c) measured postsurgical clinical outcomes; and (d) conducted in Asia-Oceania countries. Pooled effects were calculated using a random-effects model. Of the 6032 articles screened, 472 studies with a total of 614 161 patients met the inclusion criteria. The pooled incidences (95% confidence interval) of hospital mortality and 30-day mortality were similar at 2.38% (2.16%-2.59%) and 2.33% (2.16%-2.50%), respectively. Length of stay (LOS) was 14.07 days (13.44-14.71 days). The incidence for atrial fibrillation (AF) and stroke/cerebrovascular accident (CVA) was 17.49% (15.99%-18.99%) and 1.64% (1.51%-1.78%), respectively. Below outcomes tended to be better in studies on CABG compared to heart valve procedures, including the incidence of hospital mortality (1.97%[1.75%-2.18%] vs 3.97% [3.29%-4.65%]), AF (16.47% [14.85%-18.10%] vs 21.98% [17.41%-26.54%]), stoke/CVA (1.51% [1n 37%-1.65%] vs 2.55% [2.07%-3.04%]), and mean LOS (days) (13.08 [12.51-13.65] vs 19.58 [16.72-22.45]). Similarly, all postsurgical complications tended to be higher in studies involving high-risk patients vs non-high-risk patients. There are opportunities to improve clinical outcomes of patients with high surgical risks and those undertaking heart valve procedures, as they tend to have poorer survival and higher risk in developing postsurgical complications.

Speeding up PPP ambiguity resolution using triple-frequency GPS/BeiDou/Galileo/QZSS data

Precise point positioning (PPP) has been suffering from slow convergences to ambiguity-fixed solutions. It is expected that this situation can be relieved or even resolved using triple-frequency GNSS data. We therefore attempt an approach where uncombined triple-frequency GPS/BeiDou/Galileo/QZSS (Quasi-zenith satellite system) data are injected into PPP, whereas their raw ambiguities are mapped into the extra-wide-lane, wide-lane and narrow-lane combinations for integer-cycle resolution at a single station (i.e., PPP-AR). Once both extra-wide-lane and wide-lane ambiguities are fixed to integers, the resulting unambiguous (extra-)wide-lane carrier-phase can usually outweigh the raw pseudorange to improve the convergence of positions and narrow-lane ambiguities. We used 31 days of triple-frequency multi-GNSS data from 76 stations over the Asia Oceania regions and divided them into hourly pieces for real-time PPP-AR. We found that the positioning accuracy for the first 10 min of epochs could be improved by about 50% from 0.23, 0.18 and 0.43 m to 0.12, 0.08 and 0.27 m for the east, north and up components, respectively, once wide-lane ambiguity fixing was achieved for triple-frequency PPP. Consequently, 48% of PPP solutions could be initialized successfully with narrow-lane ambiguities resolved within 2 min, in contrast to only 26% for dual-frequency PPP. On average, 6 min of epochs were required to achieve triple-frequency PPP-AR, whereas 9 min for its dual-frequency counterpart. Of particular note, the more satellites contribute to triple-frequency PPP-AR, the faster the initializations will be; as a typical example, the mean initialization time declined to 3 min in case of 20–21 satellites. We therefore envision that only a few minutes of epochs will suffice to reliably initialize real-time PPP once all GPS, BeiDou, Galileo and QZSS constellations emitting triple-frequency signals are complete in the near future.

Ambitions as the Regional Representative of Asia-Oceania Region, IAWE

Ambitions as the Regional Representative of Asia-Oceania Region, IAWE

Survey of postgraduate medical physics programmes in the Asia-Oceania region

The increased use of medical imaging and radiation therapies has resulted in a high demand for medical physicists. Although medical physics programmes are well established in advanced countries, the same cannot be said for many low- and medium-income countries. In some countries, there may be huge variations in the graduates' skill and quality, which pose a problem in ensuring patient safety, providing quality assurance in treatments, optimisation of protocols and standardisation of quality. It also makes any yet-to-be-established regional peer recognition efforts problematic. In order to understand the depth of this problem, a survey was carried out as part of the home-based assignment under the RAS 6088 IAEA programme. A large diversity in terms of course content, duration, clinical training and student profile could be observed across the Asia-Oceania universities surveyed. Out of 25 programmes, only six received recognition from professional bodies, and they were mostly in Australia and New Zealand. Hence, to ensure quality education, a regional curriculum model needs to be developed to harmonise standards. And there is still a long way to go towards standardizing medical physics education and clinical training in the region.