The challenges of sustainability and sustainable development are multifaceted complex. Addressing them in the long run requires a revolution training future generations learners so that they can devise solutions for dilemmas environments characterized by uncertainty, information deficits, asymmetric power relationships. Such is under way many disciplines. Within field studies, there much promise problem-driven, solution-focused approach emphasizes experiential learning best tradition...

A fiber optic sensor (FOS) embedded perpendicular to the reinforcing fibers causes an ‘eye’-shaped defect. The length of eye is about 16 times radius (R FOS ) and height 2R FOS. contains optics in center surrounded by elongated resin pocket. Embedding geometric distortion over a equal 6-8 R . This defect severe stress concentration at root pocket, interface (in composite) between optical composite, 90 load direction composite. calculated finite element modeling representative micrograph. FE...

Abstract Multi‐ion doped hydroxyapatite (HA) is gaining more attention due to its potential in enhancing multifunctional biological, structural, and mechanical properties for orthopedic dental applications. In this study, HA with multiple cations (Sr +2 , Zn Ag + ) anion (F − was prepared by high‐energy ball milling. Sintered samples were evaluated their vitro cytocompatibility, ion release, bioactivity. The composition of multi‐ion optimized using Design experiments (DOE). Our analysis...

Demand heterogeneity often makes it profitable for firms to price and promote goods services differently in different market segments. When private consumption brings public benefits, this same can be used target subsidies. We explore the design of public–private targeting segmentation strategies case a resource-conserving agricultural technology India. To understand farmers’ heterogeneous demand laser land leveling (LLL), we conducted an experimental auction LLL with integrated randomized...

With heterogeneous demand and consumption externalities, market segmentation targeting can improve social welfare. We use a selective trial for laser land leveling (LLL) in India to understand such strategies. elicit farmer benefits from LLL services. reduces groundwater extraction by 24%, with comparable fuel savings reduced pumping. To leverage positive we combine demand, pumping effects, service provider costs evaluate the cost-effectiveness other impacts of potential A first-hour...

ABSTRACT An attempt is taken to develop a flexible and light weight polycarbonate‐based nanocomposite system which could be successfully used as dielectric material below percolation conducting beyond percolation. The has been prepared by solution mixing method in few layer graphene was incorporated conductive filler. X‐ray diffractometry, Raman spectroscopy, transmission electron microscopy, scanning microscopy techniques were employed for characterization studies. constant conductivity...

Demand heterogeneity often makes it profitable for firms to price and promote goods services differently in different market segments.When private consumption brings public benefits, this same can be used develop targeted subsidies.We explore the design of public-private targeting segmentation strategies case a resourceconserving agricultural technology India.To understand farmers' heterogeneous demand Laser Land Leveling (LLL), we conducted an experimental auction LLL with integrated...

Abstract A detailed and accurate three-dimensional finite element stress analysis was conducted on countersunk rivet holes in a plate subjected to tension loading. The included wide range of depths, thicknesses, angles widths. study confirmed some the previous results, addressed their differences, provided many new investigated angle width effects. Using FE results limiting conditions, design equation for concentration developed verified.

Heterogeneous nanocomposites based on polycarbonate (PC) as matrix and nano-sized copper (Cu) filler were prepared using the solution mixing method followed by hot pressing. Transmission electron microscopy, x-ray diffractometry, differential scanning calorimetry employed for characterization studies. Dielectric spectroscopy was carried out pure PC its within range of 1 kHz to 15 MHz. constant gradually increased with increasing volume percentage Cu particles in matrix. Percolation threshold...

ABSTRACT Polycarbonate (PC)/Lead Zirconate Titanate (PZT) composites were prepared using solution mixing method followed by hot pressing. The volume fraction of PZT particles was varied from 0 to 27.5%. SEM showed good dispersion in the PC matrix. XRD confirmed perovskite structure and amorphous polycarbonate. dielectric constant measured at 1 kHz, increased ∼3.5‐fold compared with pure PC. modified Lichtenecker equation agreed well experimental data. There no for frequency range kHz 10 MHz....

Countersunk rivets are used to join components achieve aerodynamic or hydrodynamic surfaces. At countersunk holes, three‐dimensional stress and strain concentrations occur. Previously, the present authors developed a equation for concentration factor K t through detailed finite element analysis. This paper extends study include an tε using similar approach. The resulting was verified by analysis wide range of hole configurations plate sizes. Results showed that maximum is at edge. within 5...

This paper investigates whether higher unskilled agricultural wages attributed to a labor market intervention incentivize farm owners adopt labor-saving technology. Using regression discontinuity design centered on the rollout of India's National Rural Employment Guarantee in 2006 and detailed census data, I find 10–25 percentage point shifts away from labor-intensive technologies toward ones due program. These are driven by smallest farmers use basic that directly replace labor. Unintended...

A detailed three-dimensional finite element stress analysis was conducted for countersunk rivet and straight-shank holes in a plate subjected to tension loading. The study included wide range of width radius, thickness depth ratios angles (θc). maximum concentration occurs at or near the edge. found be function depth, width, it nearly independent angle 90 ≤ θc≤ 110 deg. Using results limiting conditions hole configurations, an equation factor developed verified.