Winter Wheat Nitrogen Estimation Based on Ground-Level and UAV-Mounted Sensors

A better understanding of wheat nitrogen status is important for improving N fertilizer management in precision farming. In this study, four different sensors were evaluated for their ability to estimate winter wheat nitrogen. A Gaussian process regression (GPR) method with the sequential backward feature removal (SBBR) routine was used to identify the best combinations of vegetation indices (VIs) sensitive to wheat N indicators for different sensors. Wheat leaf N concentration (LNC), plant N concentration (PNC), and the nutrition index (NNI) were estimated by the VIs through parametric regression (PR), multivariable linear regression (MLR), and Gaussian process regression (GPR). The study results reveal that the optical fluorescence sensor provides more accurate estimates of winter wheat N status at a low-canopy coverage condition. The Dualex Nitrogen Balance Index (NBI) is the best leaf-level indicator for wheat LNC, PNC and NNI at the early wheat growth stage. At the early growth stage, Multiplex indices are the best canopy-level indicators for LNC, PNC, and NNI. At the late growth stage, ASD VIs provide accurate estimates for wheat N indicators. This study also reveals that the GPR with SBBR analysis method provides more accurate estimates of winter wheat LNC, PNC, and NNI, with the best VI combinations for these sensors across the different winter wheat growth stages, compared with the MLR and PR methods.

A Major Challenges Advanced Underground Drainage Monitoring and Automatic Rescue System using Internet of Things

In this project, An Advanced Underground Drainage Monitoring And Automatic Rescue System using Internet of Things is proposed to protect the sanitation workers form health issues. In India sewage can be cleaned from manholes and drains are a difficult and risky task for anyone, but these people/workers are forced to do these jobs just to earn for their family economy. In order to overcome this issues, a new device is proposed to monitor the human health while entering into the sewage and provide the health parameters in the real time to the officials outside or the control room. Particularly, blood pressure of sanitation workers and toxic gas level of drainage is monitored using this new proposed rescue system. The main component of this system is Arduino controller. There are three types of sensors such as Toxic gas sensor, Methane gas sensor and Ultrasonic sensor used for the proposed system. Water level indicator is used when drainage is full to find from ultrasonic sensor, SMS will be send through GSM technology. Methane Gas and Toxic gas sensor level is high, Buzzer will be ON at the same time location will be share automatically with the help of GPS. The received sensor details display on LCD at receiver with help of GSM. The performance of proposed system is compared with other existing system and shown to be more effective in terms of protect the sanitation workers from health issues.

Subjective Aging in Context: Neighborhood Social Environment and Self-perceptions of Aging among Older Adults

Self-perception of aging (SPA), one’s attitude toward one’s own aging, has been associated with health and well-being in later life. Whereas existing literature identifies individual-level predictors of SPA (e.g., education and health), little is known about the role of neighborhood context. The present study examines whether 1) neighborhood social environment is related to SPA and 2) age moderates this relationship. Our analytic sample includes 11,394 adults aged 50+ from the 2014 and 2016 waves of the Health and Retirement Study (Mean Age=68, SD=10.14, range 50-98). Indicators of neighborhood social environment include (a) perceived neighborhood social cohesion (the trust and social ties among community residents), (b) neighborhood friends, and (c) relatives living in the neighborhood. Regression analyses were performed to investigate the associations of each neighborhood-level indicator with the positive and negative dimensions of SPA. The models controlled for demographic, socio-economic, and health covariates. Greater neighborhood social cohesion (B=0.13, SE=0.01, p<.001) and having neighborhood friends (B=0.14, SE=0.02, p<0.001) were associated with higher levels of the positive SPA. As for the negative dimension of SPA, neighborhood social cohesion was the only significant predictor (B=-0.13, SE=0.01, p<0.001). Furthermore, we found significant interaction effects between neighborhood social cohesion and age: higher neighborhood cohesion was associated with more positive (B=-.003, SE=.00, p<.001) and less negative SPA ratings (B=-.003, SE=.00, p<.001) at younger ages than older ages. Our findings provide insights into how neighborhood social context shapes subjective aging, suggesting that a socially cohesive neighborhood may promote more favorable perceptions of aging, particularly for younger residents.

A Resident Fish Guild as a Higher Trophic Level Indicator of Oyster Reef Restoration Success

Eastern oysters (Crassostrea virginica) are critical foundation species in estuarine waters, but due to a combination of natural and anthropogenic pressures, oyster abundance has declined. Restoring oyster reefs and monitoring restoration success often focuses on oyster metrics, but relatively infrequently, responses of higher trophic level species and the production of related ecosystem services are accounted for. To address this, we compare the response of a resident reef fish guild (gobies, blennies, toadfish) to standard metrics of oyster restoration success. Using lift nets and seines, natural and restored reefs were monitored over a two-year period within Mosquito Lagoon, Florida, USA. Standard metrics are indicative of restoration success; live oyster density and reef thickness increased in restored reefs after 12 and 24 months. Combined, live oyster density and reef thickness were the best predictors of annual resident reef fish abundance compared to water quality metrics. These results suggest that the benefits of restoring oyster reef habitat are conferred to broader components of the food web, with benefits accruing to reef resident fishes that are a key trophic linkage between lower trophic level foundation species and higher trophic level predators inhabiting coastal ecosystems.

Rigid-Flexible Coupling Fatigue Life Reliability Study on Bonic Fish Driving Shaft

Due to the complex loads on a bionic robotic fish operating underwater, the reliability of its working mechanism has an important effect on its overall performance. By establishing a virtual prototype model for the rigid–flexible coupling of a bionic robotic fish, we obtained the instantaneous load on the caudal fin of the robotic fish based on the flapping-wing propulsion theory with MATLAB. A rigid–flexible coupled virtual prototype model for the caudal fin drive as a flexible member of the bionic robotic fish was established, and dynamic simulations were conducted on the model. The simulations revealed the weak links in the drive shaft and established a damage level indicator and fatigue reliability analysis method based on damage theory. The behavior of fatigue reliability for different stress cycles was established, and a dynamic reliability design method with great engineering application value was proposed for virtual prototypes of rigid–flexible coupled underwater bionic robots by combining the virtual prototype technology of rigid–flexible coupling with the theory of flapping wing propulsion and the theory of random load fatigue reliability.

MIS 5e sea-level history along the Pacific Coast of North America

The primary last interglacial, marine isotope substage (MIS) 5e records on the Pacific Coast of North America, from Washington (USA) to Baja California Sur (Mexico), are found in the deposits of erosional marine terraces. Warmer coasts along the southern Golfo de California host both erosional marine terraces and constructional coral reef terraces. Because the northern part of the region is tectonically active, MIS 5e terrace elevations vary considerably, from a few meters above sea level to as much as 70 m above sea level. The primary paleo-sea level indicator is the shoreline angle, the junction of the wave-cut platform with the former sea cliff, which forms very close to mean sea level. Most areas on the Pacific Coast of North America have experienced uplift since MIS 5e time, but the rate of uplift varies substantially as a function of tectonic setting. Chronology in most places is based on uranium-series ages of the solitary coral Balanophyllia elegans (erosional terraces) or the colonial corals Porites and Pocillopora (constructional reefs). In areas lacking corals, correlation to MIS 5e can sometimes be accomplished using amino acid ratios of fossil mollusks, compared to similar ratios in mollusks that also host dated corals. U-series analyses of corals that have experienced largely closed-system histories range from ~124 to ~118 ka, in good agreement with ages from MIS 5e reef terraces elsewhere in the world. There is no geomorphic, stratigraphic, or geochronology evidence for more than one high-sea stand during MIS 5e on the Pacific Coast of North America. However, in areas of low uplift rate, the outer parts of MIS 5e terraces apparently were re-occupied by the high-sea stand at ~100 ka (MIS 5c), evident from mixes of coral ages and mixes of molluscan faunas with differing thermal aspects. This sequence of events took place because glacial isostatic adjustment processes acting on North America resulted in regional high-sea stands at ~100 ka and ~80 ka that were higher than is the case in far-field regions, distant from large continental ice sheets. During MIS 5e time, sea surface temperatures (SST) off the Pacific Coast of North America were higher than is the case at present, evident from extralimital southern species of mollusks found in dated deposits. Apparently no wholesale shifts in faunal provinces took place, but in MIS 5e time, some species of bivalves and gastropods lived hundreds of kilometers north of their present northern limits, in good agreement with SST estimates derived from foraminiferal records and alkenone-based reconstructions in deep-sea cores. Because many areas of the Pacific Coast of North America have been active tectonically for much or all of the Quaternary, many earlier interglacial periods are recorded as uplifted, higher elevation terraces. In addition, from southern Oregon to northern Baja California, there are U-series-dated corals from marine terraces that formed ~80 ka, during MIS 5a. In contrast to MIS 5e, these terrace deposits host molluscan faunas that contain extralimital northern species, indicating cooler SST at the end of MIS 5. Here I present a standardized database of MIS 5e sea-level indicators along the Pacific Coast of North America and the corresponding dated samples. The database is available in Muhs (2021) [https://doi.org/10.5281/zenodo.5557355].

Examining the gendered organizations: evidence of institutional discrimination

Purpose The purpose of this study is to examine how a group of special companies, i.e. highly acknowledged and awarded ones operating in Brazil handle the gender issue. Design/methodology/approach This investigation relies on historical analysis by addressing essentially a surface-level indicator (i.e. gender preferences). Rather, this study is grounded on data from the companies that were awarded as one of the best organizations to work for in Brazil by Época-Great Place to Work® Institute and Guia Você S/A lists (between 2012 and 2016). As a result, four organizations were selected, that is, the most representative examples of gender doing. Findings Overall, it found that the glass ceiling is apparently breaking down within at least some germane Brazilian organizations. However, data suggest that other sorts of institutional discrimination may be taking place, i.e. the one in which a feminist mindset may be permeating an organization or even a whole business sector. Under such a scenario, male workers will likely have only a few opportunities. Research limitations/implications The sample size of this study does not permit that the results be generalized. In addition, data were elicited from only a specific cohort of companies. Practical implications It was found no substantial evidence that these organizations are making strides toward at least mitigating the effects of their gender unbalance, although gender equality and, broadly speaking, diversity does not constitute a new management topic anymore. Originality/value Unlike other investigations, it encompasses a larger sample of companies, draws exclusively upon gender-based organizations and is grounded on multiple sources of information. Additionally, data revealed that gendered organizations may encompass different levels of salience.

Automatic Water Tank Filling System with Water Level Indicator

In this project, we have worked with an indicator on an automatic water level controller. When we looked up our topic on the internet, we realized that most of the projects used microcontrollers or IC 555, but we didn't include any of these circuits in our model. Our design is based on the LM324N IC, which functions as a rectifier, oscillator, and comparator. On this foundation, we construct our circuit, and our model is successfully executed at a minimal cost. The project's goal is to conserve water. Water is a necessary component of our daily life. Water plays a vital role in our everyday life since there is not any water we can't imagine in our lives. Water is essential for digestion and plays some important roles in the body, such as waste removal, body temperature control, and nutrient transport. Our daily lives began in the upper tank that is the most crucial part of all the houses. Water in your house, including drinking, cooking, bathing, cleaning, and washing, is used almost for all purposes. Appliances such as washing machines and scrubbers require continuous flow. Inhouse, overhead tanks comply with those requirements. As a result, saving water for humans is important. This problem can be solved by using an automatic water level controller and indicator. The water level controller's operation is based on the fact that water conducts electricity due to the minerals in it. So As a result, the circuit can be opened or closed using water. The various circuits in the control unit send out different signals as the water level rises or falls. These signals are used to turn ON or OFF the motor pump depending on our requirements. I'm going to install an automatic water level controller so we don't have to manually turn the motor ON and OFF. The unit tracks the water level and then activates the relay, which activates the Motor. The LM324N IC, carbon level sensor, and relay are the key components in this unit. With this project, we will be able to automatically monitor water wastage and maintain water levels in various systems, such as water tanks, boilers, swimming pools, and so on. Water and energy losses are reduced as a result of this. This also saves manpower because it is no longer necessary to run it manually.

Automatic Water Tank Filling System with Water Level Indicator

In this project, we have worked with an indicator on an automatic water level controller. When we looked up our topic on the internet, we realized that most of the projects used microcontrollers or IC 555, but we didn’t include any of these circuits in our model. Our design is based on the LM324N IC, which functions as a rectifier, oscillator, and comparator. On this foundation, we construct our circuit, and our model is successfully executed at a minimal cost. The project’s goal is to conserve water. Water is a necessary component of our daily life. Water plays a vital role in our everyday life since there is not any water we can’t imagine in our lives. Water is essential for digestion and plays some important roles in the body, such as waste removal, body temperature control, and nutrient transport. Our daily lives began in the upper tank that is the most crucial part of all the houses. Water in your house, including drinking, cooking, bathing, cleaning, and washing, is used almost for all purposes. Appliances such as washing machines and scrubbers require continuous flow. In-house, overhead tanks comply with those requirements. As a result, saving water for humans is important. This problem can be solved by using an automatic water level controller and indicator. The water level controller’s operation is based on the fact that water conducts electricity due to the minerals in it. So As a result, the circuit can be opened or closed using water. The various circuits in the control unit send out different signals as the water level rises or falls. These signals are used to turn ON or OFF the motor pump depending on our requirements. I’m going to install an automatic water level controller so we don’t have to manually turn the motor ON and OFF. The unit tracks the water level and then activates the relay, which activates the Motor. The LM324N IC, carbon level sensor, and relay are the key components in this unit. With this project, we will be able to automatically monitor water wastage and maintain water levels in various systems, such as water tanks, boilers, swimming pools, and so on. Water and energy losses are reduced as a result of this. This also saves manpower because it is no longer necessary to run it manually.