Lunar Landing Research Articles

Implementasi Peraturan Gubernur Dki Jakarta Nomor 10 Tahun 2015 Tentang Penataan Dan Pemberdayaan Pedagang Kaki Lima Oleh Satuan Polisi Pamong Praja Di Pasar Minggu Jakarta Selatan

Pasar Minggu is one of the oldest markets in DKI Jakarta which is one of the causes of overcrowding, resulting in limited selling space. The lack of selling land has pushed some people to turn into street vendors (PKL) since the expansion of the Jakarta City area. As a result, Pasar Minggu has become an unorganized area, in this case it is contrary to DKI Jakarta Regulation Number 10 of 2015 concerning Arrangement and Empowerment of Street Vendors. This research is aqualitative research that aims to find out how the implementation, supporting and inhibiting factors and the right strategy in the arrangement and control of street vendors carried out by the Civil Service Police Unit at Sunday Market, South Jakarta. This study explains that there are 4 (four) indicators of policy implementation, namely communication, resources, disposition and bureaucratic structure. The process of collecting data using observation techniques, interviews, and documentation. The results showed that the implementation of DKI Governor Regulation Number 10 of 2015 concerning Arrangement and Empowerment of Street Vendors by the Civil Service Police Unit at Pasar Minggu, South Jakarta has not run optimally due to several factors, such as the lack of awareness of street vendors about order, not yet optimal enforcement of regulations, and lack of socialization of regulations. The strategies that can be used to improve the implementation of these regulations are improving the quality of Satpol PP human resources through education and training, conducting outreach related to structuring street vendors and optimizing Satpol PP tasks so they can work optimally.

The first biological experiment on lunar surface for Humankind: Device and results

The Bioregenerative Life Support System (BLSS) is an indispensable part of extraterrestrial bases as it can provide sufficient food, fresh air, recycle waste, and create a safe environment for humans. However, it is still uncertain how the natural environment of extraterrestrial bodies would affect the function of an artificial ecosystem like BLSS. The Chinese Chang'e 4 lunar lander carried a micro-ecosystem called Biological Experiment Payload (BEP), developed by Chongqing University, and conducted the first biological experiments for humans on the back of the Moon to assess the effects of low gravity, intense radiation, and light on the lunar surface to living things. The payload weighs 2.608 kg, with 198 mm in height and 173 mm in diameter, offering a total inside space of 0.82L, containing 0.42L of bio-activity space. Cotton seeds, Potato seeds, Arabidopsis seeds, Rape seeds, Fly eggs, Yeast, and 18 ml of water were placed in the BEP, which was kept at a constant atmospheric pressure. Through a light guide tube, sunlight from the lunar surface can enter the payload's interior, allowing plants to photosynthesize. One remarkable feature of BEP was the gap in radiation protection design.On January 3, 2019, BEP arrived on the back of the Moon and conducted an experiment lasting eight days, 22 h, and 45 min (Earth Day) during the first lunar day after landing. After 22 h of watering, the CCD camera captured cotton seed germination, compared to 53 h after watering in the ground synchronization experiment. The cotton seedling on the lunar surface showed a faster germination rate than the simultaneous experiments on the ground. Also, the morphology of the cotton on the Moon was changed, with its stem growing curved, developing a long part close to the substrate and a short upright portion while forming fat-flowing nodes close to the substrate. Finally, the leaves were also curled and did not unfold. The payload was dormant from 12 to 31 January 2019, with its interior remaining dark and temperatures reaching as low as −52 °C. After the lunar night, the leaves of the terrestrial synchronous experiment were completely blackened and in pieces, in contrast to the Seedling on the Moon, which was upright and green. This experiment demonstrated that plants could grow on the lunar surface even in intense radiation, low gravity (1/6 g), and prolonged intense light. It was also the first time that a biological experiment was carried out by humans on the Moon using sunlight from space to power photosynthesis.

Reaching new heights: investigating adoption factors shaping the moon landing of metaverse tourism

Reaching new heights: investigating adoption factors shaping the moon landing of metaverse tourism

The Role of Time in Post-Normal Knowledge Creation and Decision-Making in Public Administration

Scholars developing the concept of post-normal science have focused on high stakes and uncertainty to illustrate scientific inquiry and decision-making under post-normal conditions. While uncertainty and decision stakes are often challenges in any decision-making process, we argue that they are not the key factors that warrant the use of a post-normal approach, in which facts are ambiguous, values are in dispute, and stakes are high. In this paper, we center the role of time in the definition of post-normal science and offer a model of decision-making that incorporates uncertainty and high stakes within an overarching context of urgency. We then present three cases of decision-making with varying time horizons to illustrate the significance of time: The period leading up to the 2022 Russian invasion of Ukraine, the U.S. development of the atomic bomb during the Manhattan Project, and U.S. space exploration in the 1960s, culminating in the Apollo 11 Moon landing. Elaborating on the role of time in post-normal science is crucial to public administration because our field routinely involves decision making amidst ambiguous facts, disputed values, high stakes, and urgency. As the three illustrative cases further show, administrators on the ground during the lead-up to the Russian invasion of Ukraine, the Manhattan Project, and space exploration also included extended peer communities.

A COVERED SETTLEMENT ON THE MOON TAKING INTO ACCOUNT THE INTERNAL AND EXTERNAL EFFECTS OF POLARIZATION OF ITS SPACE

Statement of the problem. The basis of modern projects of settlements on the Moon, which are being developed by the countries of the space club, is the achievement of scientific and technical progress and the latest technologies in various fields of knowledge, including knowledge in the field of space medicine. This is considered objective, justified and rational. Information generation continues. More and more new sciences and opportunities for their practical application are emerging. This significantly affects the turn of the new lunar race. The competition for the development of the resources of our space neighbor is finding new facets. Ukraine participates in this marathon in cooperation with other countries. At the same time, PDABA does not remain aloof. Among the many questions that are being developed by its specialists, there is the question of accounting for fundamentally new approaches to the formation of rock-covered lunar settlements. For example, approaches to creating a geometric shape of a rounded lunar settlement based on accounting for the phenomena of internal and external polarization of the environment. This effect arises from the fact of the existence of any physical form (settlement), regardless of the materials from which it is created. It significantly affects the psychophysiology of the human body. The purpose of the article is to reveal the architectural and urban planning features of the formation of the lunar settlement based on the accounting of the phenomena of internal and external polarization of its environment.

Conjuring Up a King

Conjuring Up a King

Additive Sensory Noise Effects on Operator Performance in a Lunar Landing Simulation.

INTRODUCTION: Adding noise to a system to improve a weak signal's detectability is known as stochastic resonance (SR). SR has been shown to improve sensory perception and cognitive performance in certain individuals, but it is unknown whether this performance improvement can translate to meaningful macrocognitive enhancements in performance for complex, operational tasks.OBJECTIVE: We investigated human operator performance in a lunar landing simulation while applying auditory white noise and/or noisy galvanic vestibular stimulation.METHODS: We measured performance (N = 16 subjects) while completing simulation trials in our Aerospace Research Simulator. Trials were completed with and without the influence of auditory white noise, noisy galvanic vestibular stimulation, and both simultaneously in a multimodal fashion. Performance was observed holistically and across subdimensions of the task, which included flight skill and perception. Subjective mental workload was collected after completing four trials in each treatment.RESULTS: We did not find broad operator improvement under the influence of noise, but a significant interaction was identified between subject and noise treatment, indicating that some subjects were impacted by additive noise. We also found significant interactions between subject and noise treatment in performance subdimensions of flight skill and perception. We found no significant main effects on mental workload.CONCLUSIONS: This study investigated the utility of using additive sensory noise to induce SR for complex tasks. While SR has been shown to improve aspects of performance, our results suggest additive noise does not yield operational performance changes for a broad population, but specific individuals may be affected.Sherman SO, Shen Y-Y, Gutierrez-Mendoza D, Schlittenhart M, Watson C, Clark TK, Anderson AP. Additive sensory noise effects on operator performance in a lunar landing simulation. Aerosp Med Hum Perform. 2023; 94(10):770-779.

Numerical investigation of the electrostatic dust transport around a lunar lander

Since the Apollo era, lunar dust has been one of the major problems for lunar surface explorations, since these very abrasive and adhesive grains are harmful for both the instruments and the human beings. Normally, the lunar surface can get charged with an electric field of several V/m, which is not strong enough to launch the dust grains from the surface. However, the electric field may be enhanced when the solar wind and the sunlight are shadowed by an obstacle. Such a shadowing effect can be caused by either a natural topographic feature or a man-made object. Here we study the shadowing effect of a lunar lander with particle-in-cell simulations. It is found that the shadowed region is negatively charged, with a surface potential as low as −30 V and an electric field as large as 20 V/m. A local dust cloud is caused by the electrostatic dust transport around the lander, with a number density of about 104 m−3 at 1 m altitude and up to 105 m−3 near the surface. The surface potential is determined by the temperature of solar wind, but a higher temperature can bring a weaker electric field and a smaller dust cloud, due to the enhanced Debye length. The electrostatic dust transport favors a larger shadowed area, caused by either a larger solar zenith angle or a higher lander height. In addition, the dust transport favors a conductive lander surface, where the maximum dust density can reach 106 m−3. Our results are helpful for the future lunar explorations and have general implications in studying the dust environment of other airless bodies.

Exploiting Lunar Navigation Constellation for GNC Enhancement in Landing Missions

To support the increasing number of planned lunar missions, a collaborative international initiative is underway to conceptualise and establish a lunar satellite constellation for communication and navigation. In this context, the goal of the current paper is to analyse what the obtainable performance is for a lunar lander that executes state estimation employing one-way ranging signals from such a Lunar Navigation Service (LNS). In particular, a small-sized optimised navigation constellation is considered as the main source of measurements, which, coupled with an accelerometer and an altimeter, is used to estimate the lander absolute trajectory during the main braking phase. The guidance is extracted on board by interpolation of a ground-optimised trajectory, followed by a reference-tracking regulator. Two alternative control tuning cases are presented, one targeting high performance, the other targeting low propellant mass. Nominal performance and associated sensitivity analyses assessed the feasibility of supporting such a critical phase with a reduced LNS constellation, reaching final control errors below 500m, with the better performing one going down to 56m. Among the two proposed alternatives, the one targeting low fuel expenditure has proven, however, to also be more robust against time and state uncertainty, providing much larger success rates.

Automated precision counting of small lunar craters - A broader view

An automated system for counting small craters at lunar landing sites has been expanded to include selected locations on the Moon's far side and high latitudes. Highland areas were generally excluded from this new survey, because sloping terrain can have a significant effect on crater lifetimes. But some locations on highland light plains units were analysed, as were some young Copernican age crater ejecta blankets and impact melts.This study focuses on craters having diameters between 2.5 m and 50 m, for which counts are so high that they are best plotted as Crater Size Frequency Histograms (CSFHs), rather than the conventional cumulative plots (CSFDs). This histogram representation enables the finest details of the plots to be compared across sites. Using multiple precisely aligned images of each site enables false negatives to be included and false positives rejected, ensuring that no visually recognisable craters are missed, a capability that is not possible when analysing single images.There are some very distinct differences between the curves at different sites. Based on the known ages of boulder tracks and counts of craters formed over the last 50 years, the largest craters within the size range up to 50 m are thought to be no more that a few hundred million years old. A model for the evolution of small crater populations on an absolute time scale is presented and the absolute ages of young features are estimated.There is no evidence in the data for secondary cratering, nor is there any clear variation of counts and slopes with longitude or latitude, so other possible explanations for the variabilities between sites must be found.The results obtained by this project should prove useful for modelling crater formation and destruction and also as training data for machine learning systems.

The Eagle, the Rocket, and the Moon: U.S. Postal Iconography at the End of History

In this Photoarticle, we survey what we will call the post-historical U.S. postage stamps of the last third of the twentieth century. We focus on stamps depicting the space race and space travel, as well as the linkage of some of those stamps to the 1992 Olympic games, to analyze the iconographic and narrative consequences of an increasing turn toward the commercialization of postal services. The stamps we consider coincide with a series of new commercial strategies on the part of the United States Postal Service (USPS) and a broad resurgence in public interest in space travel. While many critics during the 1960s considered the space race to be a distraction from more pressing political concerns—such as urban poverty or the war in Vietnam—by the 1980s and 1990s, space travel had become a less controversial endeavor (perhaps due to its large-scale defunding), and astronauts, especially the Apollo 11 astronauts, were widely lauded as heroes. We have chosen this “topical” focus (as stamp collectors say) for two reasons. First, the iconography of space exploration is dominated by one specific moment, when the lunar module Eagle touched down on the moon on July 20, 1969. Despite an ongoing history of space exploration before and after 1969, the moon landing, we will argue, was treated in postal iconography as a timeless event —a climactic technological triumph that seemed to announce what Francis Fukuyama, in an influential essay, called “the end of history.”

Trajectory design and dispersion analysis of nano moon lander OMOTENASHI

OMOTENASHI is a CubeSat that was launched by a NASA SLS rocket. Its mission was to demonstrate that a CubeSat could make a semi-hard landing on the Moon. A chemical propulsion system which provides high thrust and can be re-ignited is large and difficult to install on a CubeSat. Therefore, a small cold-gas jet makes orbit corrections with only a small ΔV. Moreover, a rocket motor with a high Isp and structural mass ratio is used for a lunar landing deceleration. The spacecraft consists of an orbiting module, a rocket motor, and a surface probe. This paper analyzes the trajectory design of the Moon landing and a method that increases the landing success rate under the tight constraints of the CubeSat. To reduce fuel and power consumption, the maneuver conditions during the lunar transition to reach the target landing site are evaluated based on several error factors. This study considers the trade-off between vertical and horizontal landings. Because active control is not possible for decelerating a rocket motor for the lunar landing, the optimal altitude at the starting maneuver is determined by considering such errors as attitude and timing. Finally, the paper discusses mission feasibility and the landing success rate.

Image-Based Lunar Hazard Detection in Low Illumination Simulated Conditions via Vision Transformers.

Hazard detection is fundamental for a safe lunar landing. State-of-the-art autonomous lunar hazard detection relies on 2D image-based and 3D Lidar systems. The lunar south pole is challenging for vision-based methods. The low sun inclination and the terrain rich in topographic features create large areas in shadow, hiding the terrain features. The proposed method utilizes a vision transformer (ViT) model, which is a deep learning architecture based on the transformer blocks used in natural language processing, to solve this problem. Our goal is to train the ViT model to extract terrain features information from low-light RGB images. The results show good performances, especially at high altitudes, beating the UNet, one of the most popular convolutional neural networks, in every scenario.

UWB and MB-OFDM for Lunar Rover Navigation and Communication

This paper presents a comprehensive study of ultra-wideband (UWB) and multi-band orthogonal frequency-division multiplexing (MB-OFDM) technologies for lunar rover navigation and communication in challenging terrains. Lunar missions pose unique challenges, such as signal propagation in the lunar environment, terrain elevation, and rover movement constraints. To address these challenges, we propose a hybrid communication and navigation system that leverages UWB technology for high-precision positioning and MB-OFDM for robust and high-throughput communication. We develop a realistic simulation framework that incorporates terrain elevation, obstacles, and rover movement constraints, along with a simple fading model for communication. Simulation results demonstrate the effectiveness of the proposed system in navigating lunar rovers to their target locations while maintaining reliable communication links with a lunar lander. A novel approach based on game theory for rover navigation is also presented. The study provides valuable insights into the design and optimization of communication and navigation systems for future lunar missions, paving the way for seamless integration of advanced terrestrial technologies in extraterrestrial environments.

Life Detection on Icy Moons Using Flow Cytometry and Exogenous Fluorescent Stains.

Flow cytometry is a potential technology for in situ life detection on icy moons (such as Enceladus and Europa) and on the polar ice caps of Mars. We developed a method for using flow cytometry to positively identify four classes of biomarkers using exogenous fluorescent stains: nucleic acids, proteins, carbohydrates, and lipids. We demonstrated the effectiveness of exogenous stains with six known organisms and known abiotic material and showed that the cytometer is easily able to distinguish between the known organisms and the known abiotic material using the exogenous stains. To simulate a life-detection experiment on an icy world lander, we used six natural samples with unknown biotic and abiotic content. We showed that flow cytometry can identify all four biomarkers using the exogenous stains and can separate the biotic material from the known abiotic material on scatter plots. Exogenous staining techniques would likely be used in conjunction with intrinsic fluorescence, clustering, and sorting for a more complete and capable life-detection instrument on an icy moon lander.

Women fish vendors in Kerala, India: an analytical study of access to inputs and services

Women are predominantly engaged in postharvest fisheries and comprise about 75% of those engaged in fish marketing in India. The roles performed by fisherwomen are often not recognized. With the recent penetration of technology, mechanization, and capital orientation in fishing and fish vending, the business atmosphere has further turned against the interests of women. Women have to face competition in accessing fish, availing a prospective selling space, locating customers at their preferred time, and to adjust with the changing consumer preference to provide fish in a ready-to-cook form. With this background, a study was undertaken among women fish vendors of the south Indian state of Kerala, to analyze their access to inputs and services and to collect gender-disaggregated data. A large level of regional variation was observed in terms of the involvement of women in fish vending owing to established cultural norms. There exists skewed access to inputs and services like fish, credit, ice, infrastructure facilities, transportation, and storage facilities for women in the state. Women with poor social and economic networking were less privileged to have an incremental income from their traditional fish vending. There was a clear indication of the influence of financial capabilities such as employment days, volume, and variety of fish handled in determining the daily income of vendors. The inability to invest in fish vending activities was found to influence daily revenue. We recommend the convergent efforts of various organizations to enhance the livelihood status of fisherwomen

Design and implementation of regional integrated environmental measurement for China space station

The monitoring of cabin air pressure, temperature, humidity, microgravity and other environmental parameters is very important for the long-term and reliable operation of large manned spacecraft. Based on the characteristics of 1553B bus, a design method of regional integrated environmental measurement for the space station was proposed, which realized the high precision and reliable measurement of environmental parameters such as pressure, temperature, humidity and microgravity of china space station. The measurement data can accurately reflect the environmental changes of astronauts’ in-orbit living, working and extravehicular activities, which verifies the effectiveness of the design. It provides the necessary new principle application verification for higher precision pressure measurement in lunar landing missions.

Interpreted Investigation Report: Loss of Vikram Lander During Lunar Landing Phase

This article examines India's first science lander mission on 22 July 2019, attempting a historic landing on the Lunar South Pole Region. Communication was lost at 2.1 km above the lunar surface during the rough braking phase. The cause of the Chandrayaan 2 lander "Vikram" failure remains undisclosed. Possible factors such as vibrations, thruster issues, and power depletion are considered. Recommendations include backup power sources and direct communication systems for interplanetary missions. Despite the setback, ISRO proposed "Chandrayaan 3" to explore the lunar polar region. Chandrayaan 2's legacy influences future missions, shaping India's aspirations for pioneering space endeavors. Gratitude is expressed to ISRO for insights gained during live coverage.

Accelerating Deep Neural Network training for autonomous landing guidance via homotopy

The feasibility of utilizing Deep Neural Networks for generating guidance commands in spacecraft landing scenarios has garnered recent research interest. A primary challenge lies in the inefficiency of training sample generation. This paper proposes a new approach to address it by utilizing nonlinear homotopy methods, which involve embedding the homotopic parameter either into the performance index or the right-hand side of the differential equations. Unlike the existing approaches that overlooked the potential value of the intermediate solutions during homotopy process, the proposed method incorporates these discarded solutions as supplementary training data, which treats the homotopic parameter and state as inputs, and the control as the output. Two examples, namely a minimum-fuel lunar landing and a minimum-time asteroid landing, are provided to illustrate the effectiveness and advantages of the proposed method.

Review and Revision of the Lunar Cratering Chronology—Lunar Timescale Part 2

Times and rates of planetary surface-modifying processes are crucial for the sequence and correlation of events on planetary bodies. For most planetary surfaces, superposition principles and crater densities are commonly used methods to collect relative age information. Lunar-based cratering-chronology models, which pair crater densities and sample ages from several lunar landing and sampling sites, calibrate the relative age information in absolute time. Here, we propose calibration pairs based on new crater statistics and spectrally supported sample-age assignments for the lunar cratering-chronology model. The resulting model reflects modern high-precision, radiometric ages, compositional and spectral information, and an up-to-date crater-production function. This revision supports a crater-forming projectile flux with monotonic decay, similar to previous standard models, but of distinctively lower flux. This originates from lower crater densities identified in spectrally and morphologically defined reference units, and from assigning more precise sample ages accounting for spectral resemblance between reference unit and sample. The observed maximal values for crater densities and ages provide the oldest and most densely cratered calibration pair. Because of the nature of highland samples, age constraints for the Luna 20 and Apollo 16 sampling sites remain challenging, which restricts the confidence in times for individual basin-formation events older than Orientale Basin. The new cratering-chronology model, when transferred to other planetary bodies, would cause aging of the surfaces, because of the lower overall flux.