scholarly journals Performance Comparison of Zn-Based and Al–Si Based Coating on Boron Steel in Hot Stamping

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7043
Author(s):  
Long Chen ◽  
Wei Chen ◽  
Miao Cao ◽  
Xin Li
Keyword(s):  
Hot Stamping ◽  
Performance Comparison ◽  
Boron Steel ◽  
Deformation Degree ◽  
Significant Difference ◽  
Die Surface ◽  
Substrate Protection ◽  
Boron Steels ◽  
Better Than

The coatings of boron steels play an important role in affecting the quality of hot stamping parts, so it is important to evaluate the hot stamping performance of coatings before designing processes. Taking the U-type hot stamping part of boron steel as research objects, the surface quality, microstructure and temperature variation of samples with GA (galvannealed), GI (galvanized) and Al–Si coatings were observed and analyzed to evaluate the anti-oxidation, forming and quenching performances of different coatings. The results show that all the GA, GI and Al–Si coatings could provide good oxidation protection and also act as the lubricants for avoiding the friction damage of sample substrates and die-surface. But the different compositions of GA, GI and Al–Si coatings will contribute the different colors. Under the same deformation degree, the Al–Si coating can provide the best substrate protection and the GI coating will induce cracks in the substrate because of the liquid metal-induced embrittlement phenomenon. There is no significant difference between the quenching performances of GA, GI and Al–Si coatings, and the thermal conductivity of the GI coating is slightly better than Al–Si and GA coatings.

scholarly journals PERBANDINGAN KUALITAS PRODUK DAN MINAT MENABUNG PADA LPD DESA ADAT TAJUN DENGAN DESA ADAT TEGAL

2020 ◽  
Vol 4 (1) ◽  
pp. 59-67
Author(s):  
Eka Swarnadi Luh ◽  
Ketut Budi Susrusa ◽  
Ida Ayu Listia Dewi
Keyword(s):  
Product Quality ◽  
Financial Institutions ◽  
Rapid Development ◽  
Research Data ◽  
The Other ◽  
Physical Evidence ◽  
Significant Difference ◽  
The Difference ◽  
Better Than

LPDs are non-bank financial institutions that are regulated and approved by the Regional Regulations of the Province of Bali. The management of LPD is fully handed over to the relevant Pakraman village. In line with the rapid development of LPDs, it turns out that on the other hand it shows diverse performance, so that LPDs need to pay attention to the level of product quality and customer interest in the products offered.            The purpose of the study was to determine the comparison of product quality and interest in saving at the Tajun Traditional Village LPD with the Traditional Village of Tegal. The number of samples from Tajun Adat Village LPD was 98 people and the LPD of Tegal Traditional Village was 84 people. The research data were analyzed by the Mann-Whitney Test. The results showed that there was a significant difference between the quality of the products of the Adat Village of Tajun LPD and the Traditional Village of Tegal. This difference is indicated by indicators of physical evidence, reliability, responsiveness and empathy. The product quality of Tajun Adat Village's LPD is better than the traditional village of Tegal. There is a significant difference between the interest in saving the traditional village of Tajun LPD and the traditional village of Tegal. The difference is in the indicator of confidence. Interest in Saving Tajun Indigenous Village LPD is higher than the Traditional Village of Tegal.

Quality of Life of People With Alzheimer Disease: Comparison Between Dyads Degree of Kinship

2020 ◽  
pp. 089198872091552
Author(s):  
Marcela Moreira Lima Nogueira ◽  
Jose Pedro Simões Neto ◽  
Marcia Cristina Nascimento Dourado
Keyword(s):  
Quality Of Life ◽  
Alzheimer Disease ◽  
Linear Regression ◽  
Multivariate Regression ◽  
Self Report ◽  
Regression Analyses ◽  
Burden Of Care ◽  
Significant Difference ◽  
Better Than

The quality of life (QoL) of people with Alzheimer disease (PwAD) may be influenced by the type of relationship between carer and the PwAD. Dyads of 98 PwAD/carers (N = 49 spouse-carers; N = 49 nonspouses carers) were measured about QoL, cognition, dementia severity, awareness of disease, functionality, depression, anxiety, and burden of care. Univariate and multivariate regression analyses were conducted to identify the factors that influenced the spouse and nonspouse self-report PwAD QoL (PQOL) and to compare carers’ ratings of PwAD QoL (C-PQOL). The total score of QoL for spouse and nonspouse PwAD showed no significant difference ( P = .29). The linear regression demonstrated that higher awareness of disease was significantly related to spouse PQOL ( P = .001). Nonspouse PQOL was negatively related to lower depression ( P = .007). The total score of QoL for spouse and nonspouse C-PQOL showed no significant difference ( P = .14). The linear regression demonstrated that depression of spouse-PwAD ( P < .001) and burden of care ( P = .001) were negatively related to spouse-dyads’ C-PQOL. The nonspouse-dyads C-PQOL was negatively related to depression of nonspouse-PwAD ( P < .001), awareness of disease ( P = .001), and the mood of the carer ( P = .01). Spouse and nonspouse PwAD evaluate PQOL better than carers (C-PQOL). No significant difference was found in the total PQOL and C-PQOL of spouse and nonspouse, but dyads evaluated differently about what is important to assess QoL.

Measurement and Analysis of Time-Temperature-Transformation Curves of Boron Steel 22MnB5

2010 ◽  
Vol 29-32 ◽  
pp. 484-489 ◽  
Author(s):  
Lian Fang He ◽  
Guo Qun Zhao ◽  
Hui Ping Li
Keyword(s):  
Phase Transformation ◽  
Hot Stamping ◽  
Expansion Method ◽  
Optical Microscope ◽  
Boron Steel ◽  
Forming Technology ◽  
Measurement And Analysis ◽  
Quenching Process ◽  
Temperature Transformation ◽  
Boron Steels

Hot stamping of quenchable boron steels is a new and complex forming technology integrating metal hot forming and quenching process. In order to gain the Time – Temperature - Transformation (TTT) curves of 22MnB5, the phase-transformation temperatures of boron steel 22MnB5 are measured by DIL 805A/D quenching and deformation dilatometer. According to the expansion curves of phase-transformation at some constant temperatures, the start and finish temperatures of phase-transformation are calculated by using the expansion method and the tangential method. The types of metallographic phases after phase-transformation are judged by the optical microscope and micro hardness. The TTT curves of 22MnB5 are drawn in terms of the results of testing and calculating.

Influence of learning Ugandan folksongs using aural/oral versus notation means on US music majors’ preferences for instruction method and quality of freely created rhythmic accompaniments

2018 ◽  
Vol 36 (4) ◽  
pp. 630-643
Author(s):  
Janice N Killian ◽  
Lawrence Branco Sekalegga
Keyword(s):  
Oral Tradition ◽  
Future Research ◽  
Music Majors ◽  
Significant Difference ◽  
Better Than

To examine the quality of rhythmic improvisations after learning Ugandan folksongs via notated or aural/oral means, we asked university music majors ( N = 32) to practice two Ugandan folksongs via Western notation or while viewing a prerecorded video of an expert Ugandan performer singing the same song to mimic aural/oral tradition conditions. Subsequently participants heard an authentic performance of the song they had just learned and were asked to create a rhythmic accompaniment to that song. All conditions were counterbalanced by treatment and by song. Resulting improvisations were judged regarding whether the first was better than the second. Results indicated no significant difference between improvisations on the basis of how the song was learned ( p = 0.2617), differences between the songs themselves ( p = 0.1261) or the order of the songs ( p = 0.7518). Participants improvised better when the song was learned under notation conditions (differences not significant), but 70.1% of participants preferred to learn the song via aural/oral means ( p = 0.0041). Results are discussed in terms of challenges in assessment of improvisations and pedagogical implications for future research.

Investigation on tribological characteristics of boron steel 22MnB5–tool steel H13 tribopair at high temperature

2016 ◽  
Vol 231 (2) ◽  
pp. 165-175 ◽  
Author(s):  
Yanhong Mu ◽  
Baoyu Wang ◽  
Mingdong Huang ◽  
Jing Zhou ◽  
Xuetao Li
Keyword(s):  
High Temperature ◽  
Friction Coefficient ◽  
Tool Steel ◽  
Laser Scanning ◽  
Hot Stamping ◽  
High Strength ◽  
Tribological Characteristics ◽  
Confocal Laser ◽  
Boron Steel ◽  
Boron Steels

In the background that the quenchable boron steels have been widely used to manufacture body-in-white by hot stamping because of its ultra-high strength, the understanding of frictional characteristics of the boron steel–tool steel tribopair at high temperature should be deepened. In this work, the friction behaviors of the tool steel H13 against the boron steel 22MnB5 were investigated at different temperatures, sliding velocities, contact pressures, and lubrication conditions by ring-on-disc sliding testing. The tribological characteristics were analyzed through scanning electron microscope and confocal laser scanning. The results show the relationship between the friction coefficient and the hot stamping parameters well. The friction coefficient decreases remarkably with the increasing temperature and contact pressure, but sliding velocity has no noticeable influence on the friction coefficient. The wear mechanism also changes with different process parameters and the main mechanism is a combination of adhesive and abrasive wear. Furthermore, MoS2 lubricant can reduce the friction coefficient effectively and protect the die from severe wear.

scholarly journals A Tentative Study of Individual Puncture Path of PVP/ PKP in Treating OVCFs

2021 ◽  
Author(s):  
Sheng Guo ◽  
Changming Xiao ◽  
Chenglong Wang ◽  
Sen Li
Keyword(s):  
Operation Time ◽  
Clinical Work ◽  
The Elderly ◽  
Cement Leakage ◽  
Vertebral Compression Fractures ◽  
Surgical Methods ◽  
Significant Difference ◽  
Vas Scores ◽  
Better Than

Abstract Background: The prior objective of this study is to discuss individualized puncture path of percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP) in the treatment of the elderly with severe osteoporotic vertebral compression fractures (OVCFs).Previous studys have compared the clinical efficacy and safety of PVP and PKP. Based on their research results, we will make a further investigation about this two main operations in treating OVCFs and propose a set of original and feasible puncture plan in clinical work, which will improve efficiency and safety of PKP and PVP.Methods: We searched all the articles related to PVP and PKP in treating OVCFs on medicine database. Issues of the selected journals published from 1999 to 2020 were hand-searched by us, including experimental or review articles. Combining conclusions of these researches and clinical cases of our department, we are forged to find more common and preferred treatments for patients with OVCFs under different situations.Results: Most of thees studies revealed that there was no significant difference in relieving the back pain and improving the quality of patients’ life between PVP and PKP surgeries, which generally based on the VAS scores and Oswestry disability index(ODI) scores. However, PKP has a lower rate of bone cement leakage and incidence of adjacent vertebrae fracture than the PVP. Restoring the vertebral height and local kyphotic angle corrections of PKP are much better than that of PVP. On the other hand, more operation time, higher cost and rate of re-surgery of PKP should also be taken into consideration when we make better choice for patients. Therefore, we are forged to find individual methods for patients who are diagnosed as OVCFs.Conclusions: Both the two types of operation can significantly relieve the pain of the patients ,reduce the risk of occurring complication and mortality after OVCFs. There is no so-called best treatment for patients between PVP and PKP. We should take the comprehensive actual conditions into account when choosing surgical methods for patients with OVCFs, which is absolutely vital to us. However, individual puncture path is beneficial for us to make operations including both PKP and PVP.

scholarly journals Comparison of Knee Proprioception Between Blind and Healthy Sportsmen

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0017
Author(s):  
Mehtap Kaçmaz Şilil ◽  
Serdar Sargın ◽  
Aziz Atik ◽  
Gökhan Meriç ◽  
Muhammet Özer ◽  
...  
Keyword(s):  
Knee Joint ◽  
Motion Control ◽  
Blind People ◽  
Visual Ability ◽  
Eyes Closed ◽  
Significant Difference ◽  
Measured Angle ◽  
Visually Challenged ◽  
Better Than

Objectives: Visual sense and proprioception have a big role in motion control. Visual communication ensures the data in proprioceptive period. The other senses of blind people are improved because of the lack of the visual ability but there are not enough data for the proprioceptive quality. The purpose of this study is to compare the knee joint proprioception of the blind and normal sportsmen and figure out the prorioceptive quality. Methods: 16 visually-challenged sportsmen (12 males and 4 females) with an average age 23.6 ±3.1(ranging from 20 to 30), and 16 healthy sportsmen (12 males and 4 females) with an average age 23.5 ±3.5 (ranging from 20 to 29) from the same sport branches were included in the study. Knee joint proprioception of the subjects in the target angle was measured. Angle repeating test was used via digital goniometer which was sensitive to 1 degree. For the statistical analyses of the data Mann-Whitney U, Wilcoxon Signed Ranks tests were used. Results: There were no differences between knee proprioceptions of dominant and non-dominant extremities in both groups. When dominant extremities were compared, blind athletes got less wrong in 15 degrees measurements statistically (p<0.05). All other comparisons revealed no statisticaly significant difference in both groups. Conclusion: It has been determined that the knee joint proprioception of the visually-challenged sportsmen are better than the normal sportsmen. If the normal sportsmen do the training with their eyes closed, the quality of their knee joint proprioception may improve.

KINERJA KEUANGAN BANK PERKREDITAN RAKYAT DAN BANK PEMBIAYAAN RAKYAT SYARIAH: STUDI KASUS DI DAERAH ISTIMEWA YOGYAKARTA

2017 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Mona Iswandari ◽  
Edy Anan
Keyword(s):  
Financial Performance ◽  
T Test ◽  
Test Results ◽  
Significant Difference ◽  
Asset Quality ◽  
Better Than ◽  
Special Region

This study aimed to compare the financial performance of The Conventional Rural Bank (BPR) andIslamic Rural Bank (BPRS) in special region Yogyakarta region. The sample is gotten use purposivesampling method is choosing sample that has been fulfill inclusi citeria. Study sample is gotten 70with the case study in special region Yogyakarta region in period 2012-2014. Methods of dataanalysis using Independent Samples T-Test. Test results show that there is no significant differencewhen viewed from the ratio LDR/FDR between BPR and BPRS. Second, there is significant differencewhen viewed from the ratio ROA between BPR and BPRS. Third, there is significant difference whenviewed from the ratio ROE between BPR and BPRS. Fourth, there is significant difference whenviewed from the ratio NPL/NPF between BPR and BPRS. Generally, on the aspec of likuidity,rentibilty, capital ratio and the asset quality of the Conventional Rural Bank (BPR) showed thatfinancial performance is better than the IslamicRural Bank (BPRS).Keywords: Comparison financial performance, the Conventional Rural Bank (BPR), the IslamicRural Bank, Likuidity, Rentibility, Capital Ratio, Asset quality

A Global Approach of the Finite Element Simulation of Hot Stamping

2005 ◽  
Vol 6-8 ◽  
pp. 763-770 ◽  
Author(s):  
P. Hein
Keyword(s):  
State Of The Art ◽  
Hot Stamping ◽  
Boron Steel ◽  
Simulation Tools ◽  
Weight Saving ◽  
Current State ◽  
Forming Technology ◽  
Element Simulation ◽  
Set Up ◽  
Boron Steels

The use of quenched boron steel components is an economic way to achieve significant improvements in terms of weight saving and crash performance. The material and process knowledge on the hot stamping of boron steels (e.g. Arcelor’s USIBOR 1500 P®) by the stampers needs to be extended and accurate simulation tools must be developed to support the growth of this forming technology. This paper simultaneously addresses the specific requirements of the hot stamping simulation and the current state of the art in this field. A specific approach is presented for the detection of the process limits within the simulation tool. A software chain has been set up with the target to decrease the computation times.

scholarly journals Perbandingan Kinerja Bank Syariah dan Bank Non Syariah

1970 ◽  
Vol 3 (01) ◽  
pp. 52-59
Author(s):  
Amelia Oktrivina Diapari Siregar
Keyword(s):  
Stock Exchange ◽  
Financial Statements ◽  
Jel Classification ◽  
Performance Comparison ◽  
Research Data ◽  
Islamic Banks ◽  
Research Results ◽  
Significant Difference ◽  
Conventional Banks ◽  
Better Than

A B S T R A C T The purpose of this study was to determine and measure the performance comparison between Islamic banks with conventional banks are seen by CAR, ROA, LDR, NPL, and ROA. The research data was obtained from the financial statements listed in Indonesia Stock Exchange in 2012 - 2013. The results showed that there are significant differences between Islamic banks with conventional banks if measured by ROA, LDR, NPL, and BOPO while the CAR no significant difference between islamic banks with conventional banks. Based on research results Islamic banks overall average of the ratio used shows that the CAR, LDR, NPL, and BOPO greater than conventional banks. While conventional banks have an average ROA, and BOPO higher than islamic banks while the average CAR, LDR, and NPL better than islamic banks means that the good performance of the conventional banks because even though banks have low capital and low lending to customers this has resulted in low non performing loans in the bank so that the bank has a high income. A B S T R A K Tujuan penelitian ini adalah untuk mengetahui perbandingan kinerja bank syariah dengan bank konvensional dilihat berdasarkan rasio CAR, ROA, LDR, NPL, dan BOPO. Data penelitian ini diperoleh dari laporan keuangan yang terdaftar di Bursa Efek Indonesia tahun 2012-2013. Hasil penelitian menunjukkan bahwa terdapat perbedaan yang signifikan antara bank syariah dengan bank konvensional jika diukur dengan rasio ROA, LDR, NPL, dan BOPO sedangkan rasio CAR tidak terdapat perbedaan yang signifikan antara bank syariah dengan bank konvensional. Berdasarkan hasil penelitian bank syariah mempunyai rata – rata secara keseluruhan dari rasio yang digunakan menunjukkan bahwa rasio CAR, LDR, NPL, dan BOPO lebih besar dibandingkan dengan bank konvensional. Sedangkan bank konvensional mempunyai rata – rata rasio ROA, dan BOPO lebih tinggi dibandingkan bank syariah sedangkan rata – rata rasio CAR, LDR, dan NPL lebih rendah dibandingkan bank syariah, artinya bahwa kinerja bank konvensional bagus karena meskipun bank memiliki modal yang rendah dan rendahnya pemberian kredit kepada nasabah hal ini yang mengakibatkan rendahnya kredit bermasalah pada bank sehingga bank mempunyai pendapatan yang tinggi. JEL Classification: G14, G10

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