Certification Mode Research Articles

Driving Characteristics Analysis Method Based on Real-World Driving Data

All vehicles available for sale undergo certification tests mandated by law, and their certified fuel efficiency from these tests is indicated and disclosed. However, to address discrepancies between the certified fuel efficiency and actual driving conditions, more sophisticated certified modes, post-certification systems, and real-world driving tests have been introduced to complement the fuel efficiency certification system. The incorporation of a real-world driving mode, similar to certification modes, in vehicle research and development is of paramount importance from a directional perspective. To achieve this, various methods of configuring real-world driving modes have been proposed and applied in research. However, the validation of the correlation between fuel efficiency in real-world driving modes and certified driving modes is relatively limited. This study aimed to construct real-road driving cycles that are similar to the federal test procedure (FTP-75) and highway fuel economy test (HWFET) certification modes to determine the differences between the driving characteristics of the certification modes and real-road driving. The present study employed the commonly used relative positive acceleration analysis method along with a segmented short-trip technique for analysis. Additionally, variables such as fuel consumption and driving time were utilized to diversify our analytical methods. Test Routes A and B were configured for comparison with the fuel efficiency certification mode. An analysis of the relative positive acceleration (RPA) in both the test routes and certification mode confirmed that Test Route B, reflecting the actual driving patterns, closely follows the RPA distribution of the certification mode. Additionally, the fuel consumption for each short trip on each route was graphically represented, addressing aspects where determining the driving characteristics based solely on the RPA, such as the road grade, was difficult.

Diverse Stakeholders, Fitness, and Legitimacy: An Isomorphism Mechanism

To develop a sustainable system that balances economic production, environmental ecology, and social equality in organic agriculture, the marginal stakeholders excluded from the mainstream certification mode took the initiative to form communities upholding exchange and cooperation to develop a new certification mode, called participatory guarantee system (PGS). To mitigate the challenge on the diffusion of PGS, this study adopts the isomorphism logic to explore the fitness of diverse PGS stakeholders for enhancing their recognition of the sustainable value on PGS. Based on 113 surveys for multilateral matching in green conservation label, the key research finding indicates that there are three types of stakeholder fitness, namely, similar background, external community, and professional complementarity. Supplementary with neo-institutional theory, which emphasizes the effect of institutional pressure on individual behavior, this study focuses on how marginal stakeholders diffuse a new institution by stakeholder alignment.

Characterizing Black Carbon Emissions from Gasoline, LPG, and Diesel Vehicles via Transient Chassis-Dynamometer Tests

With global anthropogenic black carbon (BC) emissions increasing, automobiles are significantly contributing as the major source of emissions. However, the appropriate regulations of BC emissions from vehicles are not in place. This study examined BC emissions following fuel types (gasoline, liquefied petroleum gas (LPG), and diesel) and engine combustion (gasoline direct injection (GDI) and multi-port injection (MPI) for gasoline vehicles) with emission regulations. To this end, chassis dynamometer and aethalometer (AE33) were used. Driving modes created by the National Institute of Environmental Research (NIER) and emission certification modes (CVS-75 and NEDC) for vehicles in Korea were used to determine BC emissions for various vehicle speeds. In addition, the contributions of biomass and coal combustion to the data of AE33 were analyzed to determine the possibility of tracking the BC sources. MPI, LPG, and EURO 6 with diesel particulate filter (DPF) vehicles emitted the lowest BC emissions in NIER modes. Among gasoline vehicles, MPI vehicles showed the lower BC content in PM emissions. Also, older vehicles in MPI vehicles emitted the high PM and BC emissions. The BC emissions of EURO 3 vehicles without DPF were the highest as the results of previous studies, and it was found that as emissions regulations were tightened, the level of BC results of diesel vehicles became similar with MPI vehicles. The average absorption Ångström exponent (AAE) from difference emissions sources were biomass combustion (oak wood) > coal combustion (the power plant stack) > automobile emissions (gasoline, LPG, diesel).

Inspection of PN, CO2, and Regulated Gaseous Emissions Characteristics from a GDI Vehicle under Various Real-World Vehicle Test Modes

Although the chassis dynamometer type approval test considers real-world conditions, there are a few limitations to the experimental test environment that may affect gaseous or particulate emissions such as road conditions, traffic, decreasing tire pressure, or fluctuating ambient temperature. Furthermore, the real driving emission (RDE) test takes a long time, and it is too long to repeat under different experimental conditions. The National Institute of Environmental Research (NIER) test modes that reflect the driving pattern of Korea are not certification test modes, but can be used to evaluate the influence of traffic conditions because these modes consist of a total of 15 test modes that vary according to average speed. The use of the NIER #03, #09, and #13 modes as low-, medium-, and high-speed modes allow for gaseous and particulate emissions to be measured and analyzed. Additionally, the worldwide harmonized light-duty vehicle test procedure (WLTP), the certification mode of Europe, is used to test cycles to investigate the difference under cold- and hot-engine start conditions. The engine operating parameters are also measured to evaluate the relationships between the various test conditions and test cycles. The regulated and greenhouse gas levels decrease under various driving conditions, but the particle number (PN) emission level shows a different trend with gaseous emissions. While the PN and CO2 results dramatically increase when the air conditioner is on, tire pressure conditions show different PN size distributions: a large-sized PN fraction, which contains particles larger than 100 nm, increases and a sub-23 nm-sized PN fraction decreases. Under cold-start conditions in the WLTP modes, there are much higher PN emissions than that of an engine under hot-start conditions, and the sub-23-nm-sized PN fraction also increases.

THE EFFECT OF TEACHER CERTIFICATION PROGRAMS AND EDUCATION AND TRAINING MODES ON IMPROVING PEDAGOGIC COMPETENCIES ON ELEMENTARY SCHOOL TEACHER IN DKI JAKARTA

Enhancing teacher competency is one of the factors that needs to be considered to improve the quality of education. As the effort to improve teacher competence, the government has certified and implemented teacher competency training since 2006. In 2015, the average score of the teacher competency test was only 56.69. Hence, the score based on teacher competency test become the background of this research. Further, as an evaluation of the certification program and the implementation of training on improving teacher competency proclaimed by the government. This study aims to determine the effect of teacher certification programs and training modes on improving the pedagogical competence of elementary school (SD) teachers in DKI Jakarta both partially and jointly. This research method uses a quantitative method approach with ANOVA variance analysis. The results showed that the teacher certification program and training mode policies were positively and significantly affected the partly or all in increasing the elementary school teacher pedagogical competencies in DKI Jakarta. As a suggestion from the results of this study, the government should include criteria for certification of educators in teacher recruitment because the increase in teacher pedagogical competence is strongly influenced by the certification program. In addition, the government should be selective in determining teacher training modes. It is proved that education and training by empowering teacher work groups or peers is more effective in improving teacher pedagogical competencies.
 
 Keywords: Teacher Certification, Pedagogic Competence, Teaching and Training Modes

The Teaching Scheme Improvement of "Hydraulic and Pneumatic Transmission" Based on the Professional Certification Training Mode

With the promotion of Engineering Education Professional Certification, the traditional classroom teaching-oriented model has been unable to meet the requirements of the new period. The new training mode advocates the self-study of students after class, while strengthening the guiding role of the teachers. Combining with the professional certification training mode and the practical and engineering characteristics of the course of "hydraulic and pneumatic transmission", this paper puts forward a new improvement scheme in the aspects of the teaching skills; requirement of actual engineering; teaching in practical and time management after class, etc. This paper puts forward a reform plan aiming at the professional certification mode for the first time. The new teaching program is not only suitable for the new requirements of professional certification training mode, but also preparing for the higher level of professional personnel training.

Nanoparticle Filtration Characteristics of Advanced Metal Foam Media for a Spark Ignition Direct Injection Engine in Steady Engine Operating Conditions and Vehicle Test Modes

In this study, the particle formation and reduction characteristics at the engine-out position, after a three-way catalyst (TWC) and a metal foam gasoline particulate filter (GPF), were evaluated for a gasoline direct-injection (GDI) engine under part-load operating conditions. The vehicle tests were performed under the Federal Test Procedure-75 (FTP-75) and the Highway Fuel Economy Test (HWFET) modes. Particle number (PN) concentrations, size distributions, and the filtering efficiency with the GPF were evaluated with a condensation particle counter (CPC) and a differential mobility spectrometer (DMS500). Under steady engine operating conditions, the PN concentrations at the engine-out position were 9.7 × 105–2.5 × 106 N/cc. While, the PN concentrations after the GPF were 9.2 × 104–3.5 × 105 N/cc, and the PN was reduced by 77%–96%. The PN filtering efficiency with the GPF-GDI vehicle reached approximately 58% in the FTP-75 and 62% in the HWFET mode. The PN concentration of the GPF-GDI vehicle was significantly reduced to 3.95 × 1011 N/km for the FTP-75 and 8.86 × 1010 N/km for the HWFET mode. The amount of nucleation mode particles below 23 nm was substantially reduced with the GPF-GDI vehicle. The fuel economy, CO2, and regulated emissions of the GPF-GDI vehicle were equivalent to those of the base GDI vehicle under the vehicle certification modes.

국내 소형자동차의 실제 도로 주행 배출가스 특성에 관한 연구

Strengthening vehicle emission regulation is one of important policies to improve air quality in urban area. Due to the limitation of specified driving cycles for certification test to reflect real driving conditions, additional off-cycle emission regulations have been adopted in US and being developed in Europe. The driving cycles of US or Europe have been used in emission certification for Korean light-duty vehicles, but it has not been known how well the driving cycles reflect various real driving patterns in Korea. In that point of view, it is required to estimate vehicle emission based on real road driving conditions to raise the effectiveness of vehicle emission regulation in Korea. In this study, real driving emission measurements have been conducted for three Korean light-duty vehicles with PEMS. The driving routes consisted of urban, rural and motorway in Seoul and Incheon. The data have been analyzed with various averaging methods including moving averaging windows method and compared to emission limits set with emission certification modes applied to tested vehicles. The results have shown that the real driving pollutant emissions of a gasoline and a LPG vehicles have been ranged quite lower than those of emission limits on CVS-75 driving cycle. But real driving NOx of a light duty diesel vehicle has been considerably higher than emission limit of NEDC driving cycle. The higher than expected NOx emission of a diesel vehicle might be caused by different strategy to control EGR in real driving condition from NEDC driving.

Comparative investigation of regulated emissions and nano-particle characteristics of light duty vehicles using various fuels for the FTP-75 and the NEDC mode

This study was focused on experimental comparisons of the effects of various vehicle certification modes on the nano-particle and regulated emission characteristics of light duty vehicles with gasoline, diesel particulate filter (DPF) diesel, liquefied petroleum gas (LPG) and non-DPF diesel. The particulate matter, regulated emissions, and CO2 emission of various fueled vehicles were analyzed with the golden particle measurement system, as recommended by the particle measurement program. The solid particles with a diameter above 23nm, which in only non-volatile, were measured using a particle number counter (CPC). The vehicle tests were performed on the federal test procedure-75 (FTP-75) and the new European driving cycle (NEDC) mode, and the results were compared to evaluate particle formation with both CPC and a differential mobility spectrometer (DMS500). Particle formation was highly dependent on the vehicle speed and load conditions of each mode. In particular, the particle numbers of conventional fuels sharply increased during cold start, fast transient acceleration, and high-load operation phases of the vehicle emission tests. The DPF diesel vehicle fitted with a particulate filter showed substantial reduction of particulate matter whose number concentration was equivalent to those of gasoline and LPG fueled vehicles. It was found that particle emission and regulated emissions as well as CO2 emission, and fuel economy were closely related with vehicle driving patterns and fuel composition, simultaneously. Finally, sub-23nm nucleation mode particles using DMS500 were majority in the gasoline and LPG vehicles, whereas accumulation mode particles were mainly discharged in the diesel vehicles.

벤치 연비 모사 조건에서 차량용 에어컨 압축기의 특성에 관한 연구

본 연구에서는, 차량용 에어컨 시스템으로 구성된 벤치 장비에서의 실험을 통하여 에어컨 관련 북미실차 연비 평가 모드 중의 하나인 SC03 모드 연비 평가의 벤치 모사 시험 가능성을 검증하였다.본 연구에 사용된 설비는 차량용 에어컨 시스템을 실차 조건처럼 구성할 수 있는 각각의 챔버로 구분되어져 있으며, 외부 환경을 재연할 수 있도록 온도와 습도, 풍속을 제어할 수 있도록 구성하였다. 지금까지 실차 환경 풍동에서 평가 되어지던 SC03 모드 연비 평가에 대하여 시스템 벤치에서 모사가 가능하도록 실차에서 가장 중요한 변수인 차속과 차량 전면 풍속에 대응하는 압축기 회전수와 응축기 전면풍속에 대한 신뢰성을 확보하였다.이를 바탕으로 다양한 토출 용량을 가지는 압축기를 가지고 에어컨 시스템 벤치 장비에서 SC03 연비 모사 실험을 수행하여, 압축기 토출량의 차이에 따른 연비의 차이가 특징 지어지는 것을 확인하였다.

Particle number and size distribution characteristics from diesel- and liquefied-natural-gas-fuelled buses for various emission certification modes in the Republic of Korea

This study was primarily focused on the experimental comparison of the particle emission characteristics of diesel and liquefied-natural-gas (LNG) fuels for heavy-duty vehicles. Particulate matter from various heavy-duty engines and vehicles were analysed with a golden particle measurement system recommended by the Particle Measurement Program. This system consists of a constant-volume sampler, a particle number counter, and particle number diluters. To verify the particle number and size distribution characteristics of diesel-fuelled engines and buses, including LNG fuel, various dynamic operation modes, such as the European Transient Cycle (ETC) mode, the European Stabilized Cycle (ESC) mode, and the National Institute of Environmental Research mode, uniquely developed in Korea, were evaluated. The formation of the particles depended closely upon the vehicle speed and the load conditions of each mode. In particular, the particle number sharply increased for fast-transient-acceleration and high-load operation within a heavy-duty engine. The partial diesel particulate filter efficiency was evaluated under the ETC and ESC modes using both engine and vehicle dynamometers.

Effects of gasoline, diesel, LPG, and low-carbon fuels and various certification modes on nanoparticle emission characteristics in light-duty vehicles

This study was focused on experimental comparisons of the effects of various vehicle certification modes on particle emission characteristics of light-duty vehicles with gasoline, diesel, LPG, and low-carbon fuels such as bio-diesel, bioethanol, and compressed natural gas, respectively. The particulate matter from various fueled vehicles was analyzed with the golden particle measurement system recommended by the particle measurement programme, which consists of CVS, a particle number counter, and particle number diluters. To verify particle number and size distribution characteristics, various vehicle emission certification modes such as NEDC, FTP-75, and HWFET were compared to evaluate particle formation with both CPC and DMS500. The formation of particles was highly dependent on vehicle speed and load conditions for each mode. In particular, the particle numbers of conventional fuels and low-carbon fuels sharply increased during cold start, fast transient acceleration, and high-load operation phases of the vehicle emission tests. A diesel vehicle fitted with a particulate filter showed substantial reduction of particulate matter with a number concentration equivalent to gasoline and LPG fuel. Moreover, bio-fuels and natural gas have the potential to reduce the particulate emissions with the help of clean combustion and low-carbon fuel quality compared to non-DPF diesel-fueled vehicles.

Experimental investigation of nanoparticle formation characteristics from advanced gasoline and diesel fueled light duty vehicles under different certification driving modes

This paper mainly focused on the comparison of nanoparticle size distribution and number concentration level characteristics with gasoline and diesel fueled light duty vehicles. In the engine research, particle size distribution and number concentrations were analyzed by a DMS500 with engine parameters. Time-resolved particle number concentration levels from test vehicles were measured by a golden particle measurement system (GPMS) as recommended by a Particle Measurement Programme (PMP) on certification modes such as New European Driving Cycle (NEDC), Federal Test Procedure (FTP)-75, and Highway Fuel Economy Test (HWFET). In addition, particle emission characteristics from vehicles were analyzed by DMS500 during transient and high-speed driving conditions. From the results, we found that the formation of particles was highly dependent on vehicle speed and load conditions for each mode. The diesel vehicle equipped with a particulate filter showed substantial reduction of the total particle number whose number concentration was equivalent to that of the gasoline vehicle. The nucleation mode particles from gasoline fuel were mainly emitted; however, the accumulation mode particles from the diesel fuel were generally analyzed.

From fur to fir: Lessons for the BC forest industry from the anti-fur campaign

BC's forest industry is feeling internal and international pressure to change its practices, and there is an increasing move to certification, amidst debates about preferred certification modes. This reflects changes in the economies of many of Canada's rural and northern communities, which have traditionally been dependent upon natural resources, but are now coming under pressure from the global community – not only in economic terms, but in terms of social values. As demography changes, and with it, social and economic values, this pressure is likely to continue. The Canadian North first felt such pressure as a result of the European boycott of the Newfoundland seal hunt, and then anti-trapping boycotts that have occurred periodically since then. These campaigns have had a profound effect on the lifestyles, cultures and sustainability of the northern communities. Over almost three decades, the government, non-government organizations and people of the North have had to learn to deal with and respond to these external campaigns that threaten them. The lessons they have learned about the nature of these campaigns could be useful to the province of British Columbia, which is now coming under increasing pressure from Europe and the US regarding its forestry practices. This paper outlines the evolution and characteristics of the international campaigns against sealing and trapping, as well as the experiences of northerners in dealing with them. It goes on to apply these lessons to the BC situation, with some recommendations for appropriate responses. Fundamentally, these campaigns reflect changing demographic and social characteristics and values in North America and Europe, and the changing relationship of people to natural resources, but they also raise questions about fair reflection of the variety of stakeholder interests in resource decision-making, and the limits on definition of "stakeholders." Key words: Boycotts, resource use

Determination of vitamins in food-matrix Standard Reference Materials

In recent years, the National Institute of Standards and Technology (NIST) has developed several food-matrix Standard Reference Materials (SRMs) characterized for vitamins and other organic nutrients. NIST uses several “modes” for assignment of analyte concentrations in SRMs, one of which includes the use of data provided by collaborating laboratories. Certification modes and liquid chromatographic methods that were used by NIST for value assignment of vitamin concentrations in recently introduced food-matrix SRMs are described in this paper. These materials and methods include vitamins D and E in coconut oil (SRM 1563) by gravimetry and multi-dimensional liquid chromatography (LC); vitamins A, E, and several B vitamins by reversed-phase LC and vitamin C by ion-exchange chromatography in infant formula (SRM 1846); and carotenoids and vitamins A and E by reversed-phase liquid chromatography in a baby food composite (SRM 2383).