It’s possible that I shall make an ass of myself. But in that case one can always get out of it with a little dialectic. I have, of course, so worded my proposition as to be right either way (K.Marx, Letter to F.Engels on the Indian Mutiny)
Friday, March 28, 2025
A new era for green and intelligent transportation: LoRa meets distributed machine learning
LoRa technology addresses the challenges of outdoor monitoring by dynamically adjusting transmission parameters to enhance communication efficiency and range with minimal power. The study employs innovative spreading factor (SF) and hybrid models, along with K-means and DBSCAN algorithms, to optimize the allocation of end devices (EDs). This approach is particularly effective for electric vehicle (EV) station monitoring, reducing traffic congestion and pollution while ensuring robust communication across different gateway configurations.
3 Integrating machine learning with parameter adjustment models, the research significantly improves network efficiency and reliability. It uses a log-distance path loss model to estimate signal losses and explores bandwidth options and duty cycles to prevent network saturation. The strategies effectively extend the operational life of EDs, achieving a zero packet rejection rate in the hybrid model. The study highlights LoRa's potential to transform urban transportation with scalable solutions that enhance network performance and energy efficiency, addressing key urban challenges.
The implications of this research are profound for urban planners and policymakers. By integrating LoRa technology with distributed machine learning, the network connectivity of green intelligent transportation systems can be optimized. Applying LoRa technology to the monitoring systems of parking lots and EV stations significantly enhances the efficiency of goods tracking and logistics management. By utilizing LoRa EDs and strategically placed LoRa gateways, a seamless tracking infrastructure is established, which not only improves operational efficiency but also provides precise inventory levels and location data. This practical application ensures robust communication under different gateway configurations, reduces traffic congestion and pollution, and extends the operational life of terminal devices.
In the future, this technology is expected to revolutionize urban transportation by paving the way for sustainable and intelligent transportation solutions through enhanced network efficiency and reduced environmental impact. The research emphasizes the importance of reducing computational power consumption and establishing decentralized networks, achieving this through model parallelism and federated learning. By improving pure ALOHA and slotted ALOHA mechanisms and implementing distributed algorithms, the study aims to further enhance the performance of outdoor networks. Techniques such as synchronous and asynchronous gradient descent will be used to improve efficiency and responsiveness, while clustering algorithms will play a key role in reducing computational power requirements.
In summary, integrating LoRa technology into green intelligent transportation systems sets new standards for urban transportation. The research findings highlight the potential of LoRa technology in creating resilient and energy-efficient transportation systems, providing a scalable and effective solution to the growing challenges of traffic management. As major cities worldwide strive to manage traffic and reduce environmental impact, the insights from this research offer a forward-looking perspective on the future of urban transportation, showcasing the transformative potential of combining LoRa technology with distributed machine learning.
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References
Authors: Malak Abid Ali Khan a, Hongbin Ma *a, Arshad Farhad b, Asad Mujeeb c, Imran Khan Mirani d, Muhammad Hamza e
Affiliations:
a National Key Lab of Autonomous Intelligent Unmanned Systems, School of Automation, Beijing Institute of Technology, Beijing 100081, China
b Department of Computer Science, Namal University, Pakistan
c Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
d Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China
e School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
A study published in Engineering introduces an innovative approach to address the issue of perchlorate (ClO4−) contamination in water. Perchlorate is a harmful oxo-anion found in aquatic environments. It can enter the human body through drinking water and inhibit iodine absorption in the thyroid gland, potentially causing various thyroid-related diseases. Given the strict perchlorate limits in drinking water worldwide, such as 70 μg/L in China and 15 μg/L in the United States, developing efficient methods for its removal is crucial.
The research team, hailing from Hunan University and Shanghai Jiao Tong University, prepared an adsorbent by anchoring N⁺–C–H hydrogen bond donors in hydrophobic cavities. This was achieved through the interaction of cationic surfactants, like cetyltrimethylammonium bromide (CTAB) and cetylpyridinium chloride (CPC), with montmorillonite (MMT).
Batch experiments demonstrated the excellent performance of the cationic surfactant-modified MMT. It showed high selectivity for perchlorate over common competing anions, including SO42–, NO3–, PO43–, HCO3–, and halide anions. The adsorption kinetics were fast, and the adsorption capacity was relatively high compared to traditional adsorbents such as activated carbon, clay, or zeolite. For instance, the pseudo-second-order adsorption rate constants for CTAB-MMT and CPC-MMT were 0.0306 and 0.0153 per minute respectively, much higher than those of some traditional counterparts.
The researchers delved into the adsorption mechanisms. Electrostatic attraction was ruled out as the main driving force because the adsorbent could effectively remove perchlorate even at pH values higher than its isoelectric point. Instead, density functional theory (DFT) calculations indicated that unconventional CH···O hydrogen bonding was the primary mechanism. The C–H bonds adjacent to the quaternary ammonium in the cationic surfactants could act as hydrogen bond donors, forming strong bonds with perchlorate. The hydrophobic cavities formed by the long-chain tail groups of the cationic surfactants also played a role. They sheltered the C–H bonds, allowing only anions with low hydration energy, like perchlorate, to interact with the hydrogen bond donors.
To assess its practicality, cyclic adsorption experiments and fixed-bed column tests were carried out. The adsorbent exhibited good cyclic stability, maintaining a removal efficiency of over 80% after 20 cycles. In the fixed-bed column test, it could treat a large volume of water with an initial perchlorate concentration of 500 μg/L to below the drinking water limit of 70 μg/L, with an enrichment factor of 10.3.
This new adsorbent provides a practical and potentially cost-effective solution for perchlorate removal from water. It holds promise for applications in drinking water treatment plants, potentially improving the quality of drinking water and safeguarding public health.
Highly Selective Removal of Perchlorate from Water: Roles of Unconventional Hydrogen Bond and Hydrophobic Cavity
Scientific freedom faces a number of threats and challenges, says researcher
Illiberal and authoritarian governments, economic power and digital media are some of the problems facing scientists, says São Paulo State University professor Murilo Gaspardo in a lecture during FAPESP Week Germany
Fundação de Amparo à Pesquisa do Estado de São Paulo
Heide Ahrens, Secretary General of the DFG, Moacyr Ayres Novaes Filho, professor at FFLCH-USP and coordinator of the panel, and Murilo Gaspardo, from UNESP
The world is going through a critical moment of polycrises, characterized by climate change, growing economic and social inequalities, geopolitical instability and the advance of illiberal democracies. At the same time, the institutions responsible for finding solutions to these and other crises have failed to act, facilitating the rise of nationalist and populist leaders who, once in power, exacerbate the deadlocks in global governance.
To meet these challenges, science diplomacy will become even more necessary. However, at a time when it is most needed, scientific freedom also faces threats and challenges, said Murilo Gaspardo, professor at the Faculty of Humanities and Social Sciences at São Paulo State University (UNESP), at its campus in Franca, Brazil, in a lecture presented during FAPESP Week Germany.
“At a time when the world needs international cooperation the most, it’s become more difficult because the problems are planetary in scale and global governance is at an impasse. Something similar is also happening with science diplomacy, which is more necessary than ever to respond to global challenges, but there are a number of threats to scientific freedom in the world today,” Gaspardo told.
According to the researcher, who coordinates a FAPESP-funded Thematic Project on the crisis of democracy and institutional legal arrangements, one of the threats to scientific freedom is illiberal and authoritarian governments.
In Brazil, for example, during the administration of former President Jair Bolsonaro (2019-2022), scientific freedom was challenged by disregard for the autonomy of federal universities, restrictions on research funding, and symbolic attacks on science and scientists, Gaspardo said.
“Fortunately, Brazilian institutions proved resilient. The judiciary defended the protection of freedom of expression and university autonomy, and civil society and the press also played an important role in defending science,” he pointed out.
According to the researcher, in the state of São Paulo, FAPESP has played and continues to play a crucial role in defending and guaranteeing the conditions for scientific freedom. “This is due to the commitment of its leadership, its broad public recognition and its legal institutionalization, including the constitutional guarantee of funding,” he said.
The United States, meanwhile, faces an even more complex challenge at the start of President Donald Trump’s second term, the researcher pointed out. “What can we expect from the resilience of American institutions in defending scientific freedom? How will this process affect scientific freedom around the world?” he asked.
Economic power and social media
Economic power also poses a threat to scientific freedom, Gaspardo pointed out. Partnerships with companies and private foundations are beneficial and necessary for scientific and technological progress. But the scientific agenda should not be driven by private interests, he reflected.
“Just as scientific freedom requires protecting the autonomy of scientists and research institutions from non-liberal governments, it must also remain independent from economic power. This underscores the essential role of public investment,” he argued.
Another new challenge to scientific freedom is digital information technologies and social media, Gaspardo said.
While they are valuable tools for scientific research and the dissemination of discoveries, they have also been used to threaten and intimidate scientists, spread disinformation, and undermine the authority of scientific knowledge, he pointed out. “Critical thinking and scientific progress cannot flourish under fear and intimidation.”
The researcher reflected that in the current world scenario, science diplomacy has a crucial role to play in promoting cooperation among scientists in developing analyses and responses to global challenges, as well as in defending scientific freedom and the safety of researchers. But it will not be able to solve all the current problems on its own.
“As there are impasses in government diplomacy, science diplomacy has become even more important and indispensable. It’s perhaps the only rational channel of communication between countries today. The most important channel of conversation between Brazil and Germany today, for example, will be between academics, scientists,” he said.
Safe spaces
Science diplomacy can also provide “safe spaces” for scientists, pointed out Heide Ahrens, Secretary General of the German Research Foundation (DFG).
“A good example of this is the funding line for academic refugees that the DFG set up a few years ago,” she said.
Cross-border scientific interactions that address global challenges have great diplomatic potential, she pointed out.
“They can make a valuable contribution precisely because science is often the last issue to be discussed when there’s political disagreement or conflict, and the first when relations begin to thaw. This makes it exceptionally useful even in the most difficult diplomatic situations,” she noted.
In her opinion, conflicts and crises around the world have always had a negative impact on free research. Today, however, science is also facing a series of concrete political interference and targeted attacks on scientific freedom.
“This includes populist simplifications, fake news, and anti-scientific ideologies, as well as deep and sudden budget cuts, scientific espionage, and attacks on research and data infrastructures. There’s no doubt that the freedom of scientific research in most parts of the world has rarely been as threatened as it is today.”
She emphasized that it is precisely freedom from political, ideological, or religious restrictions that allows researchers to pursue their innate curiosity and epistemological thirst for knowledge without hindrance.
“This makes freedom of research and the independence of scientific organizations indispensable prerequisites for the discovery of new knowledge and the realization of innovative ideas that were previously unimaginable across the entire spectrum of possibilities. In short, scientific freedom is indispensable for the progress and well-being of economies and societies. Scientific freedom is therefore neither an end in itself nor a matter of routine – unfortunately, not even when it’s enshrined in the constitution, as it is here in Germany,” she said.
ECNU Review of Education study calls for reconstructing human education in an uncertain world
In light of new challenges and uncertainties, the study calls for a complete revamping of the education system in today’s world
In a complex world full of uncertainty, being able to uphold the ideal of quality education that promotes human development, and a shared life of happiness is essential. It is imperative for education policy researchers to free themselves from the confines of the local perspective and seek international cooperation based on global interests in a concerted effort to provide intellectual support for catalyzing a new system for education.
Credit: gibsongolfer on Flickr | Image Source Link: https://openverse.org/image/d8b3c4a2-2e1f-40bf-bf2c-0db3d52ae251
As of 2009, researchers have declared that the world and its various economic, technological, and social systems, have entered an era of increased ambiguity and volatility. The enduring aftermath of the COVID-19 pandemic, including the persistent effects of “long COVID-19,” heightened geopolitical insecurities, repercussions of sluggish global economic growth, and challenges and opportunities posed by smart technology to economic and social development have contributed to an increasingly uncertain global landscape. In response to these global challenges in politics, economics, science and technology, coupled with escalating uncertainties in social development, there is a pressing need to design an innovative and dynamic human education system centered around the advancement of human well-being and sustainable development.
Now, a study by Dr. Guorui Fan from East China Normal University emphasizes the urgent need to build an innovative and dynamic education system in response to the increasing uncertainties in global politics, economy, science, and technology. This article was made available online on January 8, 2025, in ECNU Review of Education. The research utilizes empirical data from renowned international organizations such as the United Nations, UNESCO, the World Bank, and the Organisation for Economic Co-operation and Development to analyze the uncertainties facing global development. It also explores the challenges and opportunities in educational reform and delves into the complexities of contemporary uncertainties.
The study highlights several key factors contributing to the uncertainty in the world. The COVID-19 pandemic, the most severe public health crisis since World War II, has had long-term impacts on people’s physical and mental health. The Russia-Ukraine war and complex geopolitics have dealt a heavy blow to human values and the model of globalization. The global economy has been severely affected, and economic development is facing a long and continuous downturn. Meanwhile, the emergence of generative artificial intelligence technologies, such as ChatGPT and DeepSeek, has changed the way humans learn, work, and live.
The study points out that the existing education system’s organizational structure and systems reinforce its inherent conservatism, making it less adaptable to the rapidly changing social, economic, and cultural developments outside the education system. The growing uncertainty in economic and social development has weakened society’s support for educational reform. The deterioration of the labor market has led people to question the value of the industrialist education system. Artificial intelligence is fundamentally changing the way human knowledge is produced and disseminated, shaking the foundation of the modern education system.
Moreover, the study also highlights the current limitations of the education system which divides an individual’s life into stages of education, work, and retirement. Additionally, the various levels and types of education (schools) are disconnected from one another owing to their increasingly organized and institutionalized nature of current schooling systems around the world. This compartmentalized and divided process of teaching leads to the artificial fragmentation of the education process. The rigid and mechanical nature of the institutionalized education also makes it inherently vulnerable to the control and intervention of powerful external forces such as governmental departments and education administration systems.
To tackle these issues, Dr. Fan proposes strategies including reconstructing humanistic education values, rebuilding an educational contract based on understanding and cooperation, developing a dynamic and flexible lifelong education system, and exploring AI-empowered education models. The focus should shift from knowledge-based teaching to enhancing thinking and abilities, aiming to create a new educational system promoting healthy and sustainable development.
In summary, Dr. Fan emphasizes that reconstructing human education in an uncertain world is an urgent task. By adopting the strategies outlined in this study, we can build an innovative and dynamic education system that meets the needs of the changing world and promote human well-being and sustainable development.
The Reconfiguration of Human Education in an Uncertain World
US Youth gun homicides doubled during second half of pandemic while adult rates returned to pre-COVID level
New findings indicate that gun homicide rates rose faster among youth than adults during the second half of the pandemic, and these rates show no sign of decreasing
At the height of the COVID-19 pandemic, firearm violence surpassed motor vehicle accidents as the leading cause of death among US children. A new study led by Boston University School of Public Health (BUSPH) for the first time reveals how this worrying pattern among children varied by age—and how the pandemic-related gun homicide spike is rising faster among kids than adults.
Published in JAMA Pediatrics, the study found that the spike in gun death rates during the first two years of the pandemic disproportionately affected adolescents ages 10-16, as well as adults over 30 years old. These increases lowered the peak risk of being a victim of a fatal shooting from 21 years old to 19 years old.
Also concerning is that as adult gun death rates returned to pre-COVID levels in 2022 and 2023, gun homicide rates continued increasing for the 10-16 adolescent age group, doubling pre-pandemic rates.
These results underscore the need to improve gun violence prevention programs and policies substantially for all age groups, but especially school-aged children, for whom few such programs exist. Most community-based violence intervention (CVI) programs target older teens and adults, the groups that are traditionally at highest risk of gun violence. But these latest findings indicate that the victims of gun violence are getting—and staying—younger than in pre-pandemic times.
This stark and persistent rise in firearm homicide rates among adolescents is startling, says study lead and corresponding author Dr. Jonathan Jay, assistant professor of community health sciences at BUSPH and director of the Research on Innovations for Safety and Equity (RISE) Lab. While he was surprised by the magnitude of increase in homicides among 10-16-year-olds later in the pandemic, he says the findings echo what he has heard from violence prevention advocates for some time.
“We already knew that there was a huge spike in firearm mortality early in the pandemic, but no one had documented this really striking increase in deaths in subsequent years, and how this risk changed by age,” Dr. Jay says. “Our study results are entirely consistent with communities’ concerns that gun violence is worsening among younger people.”
For the study, researchers from BUSPH and the University of Michigan (UM) examined federal data on firearm mortality per 100,000 people ages 10-44 in the US from 1999 to 2023, labeling the period from 1999 to 2020 as the “prepandemic” period and the years from 2020-2023 as the “postonset” period.
Prior to the pandemic, firearm deaths among this population steadily increased until peaking at age 21, and then gradually decreased among all ages. Age-specific firearm mortality rates were most pronounced in 2022 and 2023, during which deaths among 10-16-year-olds doubled from their prepandemic total, while deaths among 22-26-year-olds showed the smallest increase.
CVI programs focused on adolescents are needed, the researchers say. Led by trusted community members, these programs are in a unique position to connect with members of their own community who are most at risk of gun violence. They provide evidence-based strategies to prevent gun violence, such as mentorship, dispute resolutions, conflict mediation, and psychotherapy to help gun violence victims (as well as those who are indirectly affected) cope with the resulting physical and emotional trauma of shootings.
This work is particularly critical because most child homicides happen in the community, the researchers note.
Although the national conversation around child firearm violence prevention tends to revolve around mass shootings at schools, these shootings—while tragic—are rare, Dr. Jay says. Interventions that seek to limit children’s access to firearms (such as gun locks and safe storage options) are important, but they are not the primary measures that should inform child homicide prevention, he adds.
“Most children are not shot by other kids,” he says. “The majority of gun homicides of school-aged children occur in the community, and we still don’t have a model for what community-based violence interventions should look like at those ages.”
Summer youth programs are one promising solution, says study coauthor Dr. Patrece Joseph, assistant professor of community health sciences at BUSPH.
“Many cities began offering summer youth employment programs as a way to reduce youth firearm violence, but more research is needed to understand the effects of these programs, as well as to identify opportunities to reduce after-school risk of gun violence,” Dr. Joseph says.
Cities are also beginning to implement initiatives such as Safe Passage programs, which often include collaborations among community leaders, law enforcement, and others to ensure that students travel to and from school safely. Other cities, such as Toledo, Ohio, are calling on “interrupters”—trusted members of the community—who work to de-escalate violence in schools, communities, and online.
More research is needed to understand the specific ways in which social media contributes to youth gun violence.
“There are many different pathways by which social media can lead to firearm violence in communities,” says Dr. Joseph. “Sometimes conflicts start on social media platforms and then escalate in the community, and other times, these posts amplify confrontations that began in the community and then spread online, creating a cycle of violence.”
The study was funded by the National Institute on Minority Health and Health Disparities. The senior author is Dr. Jason Goldstick, director of statistics and methods at the University of Michigan Injury Prevention Center, and a research associate professor of emergency medicine and health behavior and health equity at UM.
About Boston University School of Public Health
Founded in 1976, Boston University School of Public Health is one of the top ten ranked schools of public health in the world. It offers master's- and doctoral-level education in public health. The faculty in six departments conduct policy-changing public health research around the world, with the mission of improving the health of populations—especially the disadvantaged, underserved, and vulnerable—locally and globally.
