90 research outputs found
Effect of aeration on selected water quality parameters in freshwater fish culture
No full textThis paper report findings of an investigation into the effect of aeration devices on some selected freshwater quality parameters. Three aeration columns, Upturned shower rose (USR), Downturned shower rose (DSR) and Perforated pipe (PEP) were experimented. Freshwater fish culture water was passed through the devices and analysed for Temperature, pH, Alkalinity and Dissolved oxygen (DO) in the morning, afternoon and evening. The percentage modification was used to measure the effect of aeration on the selected water quality parameters. Temperature modification ranged from -2.4% to 0% with equal value in all the aeration devices at all the period, Alkalinity ranged between -10.7% and 3.7% with least modification in DSR in the morning but highest in USR in the evening, The percentage modification in pH fell between -8.3% and -1.8% with the least modification in USR in the morning while the highest was recorded also in USR but in the evening. The DO ranged between 37.1% to 161.9% with the highest modification in DSR in the afternoon and the lowest in USR in the evening. The investigated aerating devices have little effect on all the selected water quality parameters, except for dissolved oxygen where the effect is very prominent.Keywords: Aeration columns, aquaculture, downturned shower rose, freshwater quality, perforated pipe, upturned shower rose
Selected aspects of the university social responsibility (USR) in Poland
No full textMotivation: In accordance with the Law on Higher Education, the mission of the Polish education and science system is to provide top quality education and scientific activity, develop civic attitudes, and be involved in social development and creation of an innovation-based economy. The third mission of an academy focusing on social responsibility is to build mutual relations with the community in order to popularise and implement research results. In recent years, university social responsibility (USR) has turned into one of the priorities for Polish academic authorities, although research shows this to be a new matter in this area, which often leads to incorrect classification of activities resulting from regular obedience of the law as activities confirming the social responsibility of the organisation.
Aim: The main objective of this article is to identify examples of socially responsible activity assumed by Polish academies and demonstrate the similarities with such activities conducted by other foreign academies. The author also wanted to associate the name of Professor Karol Adamiecki with social responsibility affairs what is usually overlooked in studies on this subject.
Results: The conducted analyses confirmed that Polish academies are assuming socially responsible activity voluntarily and not just in order to fulfil the criterion of conformity with the currently effective laws. Furthermore, these results also confirm that — in comparison with academies abroad — the involvement of Polish academies in implementation of the concept of social responsibility is on the right path of development, although not as popularised, which only confirms the genuine and non-marketing approach to the matter of social responsibility
Author-Kit
No full text[SC 2020] output from commands that gather execution environment information.
# Environment information of Sunway Taihulight:
1. MPI version
bsub -I -n 1 -q q_sw_expr ./mpichversion
Job has been submitted to queue
waiting for dispatch ...
dispatching ...
MVAPICH2 Version: 2.2a
MVAPICH2 Release date: Mon Aug 17 20:00:00 EDT 2015
MVAPICH2 Device: ch3:mrail
MVAPICH2 configure: --without-cma --with-rdma=gen2 -prefix=/usr/sw-mpp/mpi2/mpiswgcc --with-pm=no --with-ib-include=/usr/sw-mpp/include --with-ib-libpath=/usr/sw-mpp/lib --enable-threads=single --enable-cxx --enable-f77 --enable-fc --enable-romio --with-ch3-rank-bits=32 --without-mpe --without-hwloc --disable-rdma-cm --disable-mcast --with-atomic-primitives=no --disable-fuse --disable-shared --enable-static --with-cross=crossfile --disable-registration-cache --host=sw --disable-smpcoll
MVAPICH2 CC: sw5gcc -mhost -DCONFIG_SWIB -DNDEBUG -DNVALGRIND -O2
MVAPICH2 CXX: sw5g++ -mhost -DNDEBUG -DNVALGRIND -O2
MVAPICH2 F77: sw5gfortran -mhost -L/usr/sw-mpp/lib -O2
MVAPICH2 FC: sw5gfortran -mhost -O2
Job 48191998 has been finished.
2. uname -a
bsub -I -n 1 -q q_sw_expr uname -a
Job has been submitted to queue
waiting for dispatch ...
dispatching ...
Linux vn000001 3.8.0-sw5 # SMP Wed Apr 25 10:49:45 CST 2018 sw_64 GNU/Linux
Job 48192008 has been finished.
3. cpuinfo
bsub -I -n 1 -q q_sw_expr lscpu || cat /proc/cpuinfo
Job has been submitted to queue
waiting for dispatch ...
dispatching ...
vn000000: exec_task: execvp(/usr/bin/lscpu) failed. errno= 2, reason: No such file or directory
[48192041 ## Sun Apr 19 11:28:11 2020] warning: node [0]: user's mpe task: tid= 0, pid= 11761, exit_code= 2
Job 48192041 has been finished. exit_code is 2
bsub -I -n 1 -q q_sw_expr cat /proc/cpuinfo
Job has been submitted to queue
waiting for dispatch ...
dispatching ...
cpu : SW_64
cpu model : SW5
cpu variation : 1
cpu revision : 0
cpu serial number :
system type : shenwei
system variation : 0
system revision : 0
system serial number :
cycle frequency [Hz] : 1450000000
timer frequency [Hz] : 0.24
page size [bytes] : 8192
phys. address bits : 44
max. addr. space # : 255
BogoMIPS : 0.81
kernel unaligned acc : 0 (pc=0,va=0)
user unaligned acc : 848883545 (pc=4ff041fca8,va=5000281914)
platform string : N/A
cpus detected : 4
cpus active : 4
cpu active mask : 0000000000001111
cpus core_start : 000000000000000f
mem cycle freq : 500
L1 Icache : 64K, 2-way, 64b line
L1 Dcache : 64K, 2-way, 64b line
L2 cache : n/a
L3 cache : n/a
Job 48192044 has been finished.
4. meninfo
bsub -I -n 1 -q q_sw_expr cat /proc/meminfo
Job has been submitted to queue
waiting for dispatch ...
dispatching ...
MemTotal: 2038472 kB
MemFree: 372600 kB
Buffers: 0 kB
Cached: 1371984 kB
SwapCached: 0 kB
Active: 718224 kB
Inactive: 715008 kB
Active(anon): 131576 kB
Inactive(anon): 8 kB
Active(file): 586648 kB
Inactive(file): 715000 kB
Unevictable: 70912 kB
Mlocked: 2904 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 132136 kB
Mapped: 4224 kB
Shmem: 24 kB
Slab: 22040 kB
SReclaimable: 5144 kB
SUnreclaim: 16896 kB
KernelStack: 4368 kB
PageTables: 328 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 1019232 kB
Committed_AS: 200360 kB
VmallocTotal: 8388608 kB
VmallocUsed: 12208 kB
VmallocChunk: 8376400 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 8192 kB
======================= cg0 =====================
UserPages_Mem_size: 8192 MB
UserPages_Conti_Total: 7680 MB
UserPages_Conti_Free: 7680 MB
UserPages_Conti_Used: 0 MB
UserPages_Cross_Size: 0 MB
======================= cg1 =====================
UserPages_Mem_size: 8192 MB
UserPages_Conti_Total: 7680 MB
UserPages_Conti_Free: 7680 MB
UserPages_Conti_Used: 0 MB
UserPages_Cross_Size: 0 MB
======================= cg2 =====================
UserPages_Mem_size: 8192 MB
UserPages_Conti_Total: 7680 MB
UserPages_Conti_Free: 7680 MB
UserPages_Conti_Used: 0 MB
UserPages_Cross_Size: 0 MB
======================= cg3 =====================
UserPages_Mem_size: 8192 MB
UserPages_Conti_Total: 7680 MB
UserPages_Conti_Free: 7680 MB
UserPages_Conti_Used: 0 MB
UserPages_Cross_Size: 0 MB
Job 48192086 has been finished.
## Environment information of TianHe 2
we run script provided by Author-Kit on login node of TianHe2
#! /bin/sh
# Linux data-gathering commands; adjust as necessary for your platform.
#
# Be sure to remove any information from the output that would violate
# SC's double-blind review policies.
env | sed "s/USER/USER/g"
set -x
lsb_release -a
uname -a
lscpu || cat /proc/cpuinfo
cat /proc/meminfo
inxi -F -c0
lsblk -a
lsscsi -s
module list
nvidia-smi
(lshw -short -quiet -sanitize || lspci) | cat
the output is in file collect_environment-tianhe2-output.txt of current repository
Unmixed steam reforming of methane and sunflower oil: A single-reactor process for H-2-rich gas
No full textInitial tests results are presented for the novel process of hydrogen production called unmixed steam reforming (USR) using methane and sunflower oil fuels. The USR process relies on two mass transfer materials which operate on a two-step cycle: an oxygen transfer material (OTM) which provides the heat necessary for the steam reforming reaction, and a CO2 sorbent which shifts the water gas reaction yielding a H2-rich reformate gas. A shortlist of Ni-based OTMs and a natural dolomite were tested during bench-scale investigation and optimisation stages following micro-reactor tests. Under near-isothermal conditions, we show the sequence via which the main reactions occurred. We unexpectedly found that thermal decomposition of the fuel played a significant role in the early H2 production concurrent with coking conditions, by causing the OTM to initially reduce. The direct OTM reduction from the fuel via the unmixed combustion reaction then took over to a point where the steam reforming reaction could begin. Most importantly, carbon lay-down (coking) during the fuel/steam flow did not lower gradually the process efficiency, as it was shown to completely oxidise under the cyclic feeds of air and fuel/steam flows of the USR process. Both methane and sunflower oil were shown to be suitable fuels for the USR process
Bibliometric analysis of scientific production on university social responsibility in Latin America and the Caribbean [version 2; peer review: 2 approved]
No full textObjective: To evaluate the scientific production on university social responsibility (USR) from institutions in Latin America and the Caribbean. Methods: A bibliometric analysis was conducted on documents published in indexed journals in the Scopus database from its inception until April 2023. Eligible documents included those on USR describing experiences carried out by universities in Latin America and the Caribbean. The number of articles per author, average authors per article, average citations per article, and the number of documents with one or more author were described. Bibliometric indicators regarding authors per article, co-authors per article, and institutional collaboration were presented. Bibliometric networks were constructed based on bibliographic coupling analysis of documents by countries and term co-occurrence in titles and abstracts. Results: Of a total of 4075 documents retrieved from Scopus, 150 were included. Documents published between 1997 and 2023 were identified, with an average annual growth rate of 2.7%. A total of 439 authors were identified, 18 articles had a single author, and an average of 0.3 articles per author and a co-authorship index of 3.13 were found. The percentage of international collaborations was 30.7%. Brazil had the highest proportion of publications (26.4%), followed by Chile (17%) and Colombia (13.2%). Opción and Revista de Ciencias Sociales were the journals with the highest number of articles published (13 each). In the analysis of term co-occurrence, recent years showed an increase in the use of terms related to e-learning, information and communication technologies, virtual education, COVID-19, sustainable development goals, and URSULA (initiative on USR in institutions in Latin America and the Caribbean). Conclusions: A growth in scientific production on USR in Latin America and the Caribbean was identified. The interest in USR documents in recent years has been focused on COVID-19 and the challenges of virtual education and sustainable development
Ear decompositions of matching covered graphs
No full textEar decompositions of matching covered graphs are important for understanding their structure. By exploiting the properties of the dependence relation introduced by Carvalho and Lucchesi in [2], we are able to provide simple proofs of several well-known theorems concerning ear decompositions. Our method actually provides proofs of generalizations of these theorems. For example, we show that every matching covered graph G different from K-2 and C-2n has at least Delta edge-disjoint removable ears, where Delta is the maximum degree of G. This shows that any matching covered graph G has at least Delta! different ear decompositions, and thus is a generalization of the fundamental theorem of Lovasz and Plummer establishing the existence of ear decompositions. We also show that every brick G different from K-4 and (C) over bar(6) has Delta-2 edges, each of which is a removable edge in G, that is, an edge whose deletion from G results in a matching covered graph. This generalizes a well-known theorem of Lovasz. We also give a simple proof of another theorem due to Lovasz which says that every nonbipartite matching covered graph has a canonical ear decomposition, that is, one in which either the third graph in the sequence is an odd-subdivision of K-4 or the fourth graph in the sequence is an odd-subdivision of (C) over bar(6). Our method in fact shows that every nonbipartite matching covered graph has a canonical ear decomposition which is optimal, that is one which has as few double ears as possible. Most of these results appear in the Ph. D. thesis of the first author [1], written under the supervision of the second author.19215117
Sirian and Iranian feminine figurines in the collections of MAE/USP
No full textThis article intends to present twelve terracotta figurines preserved in MAE-USR The author gives an up-to-date classification of this material, considering provenience and chronology. The magic functions of these figurines in Ancient Near Eastern Societies are algo considered
Social responsibility of high education institution in Vietnam
No full textDang, T.T.H. Social Responsibility of Higher Education Institution in Vietnam, Bachelor Thesis. Brno: Mendel University, 2017.This Bachelor Thesis is concern about Social Responsibility in Higher Education Institution (USR). The aim of the Thesis is to give recommendation on the field of Corporate Social Responsibility to a Vietnamese Higher Education Institution with economic focus-Economic Faculty, Thu Dau Mot University (EF-TDMU)by comparison with the Faculty of Businiess and Management, Mendel University (FBE-MENDELU). The recommendation is obtained based on qualitative method, benchmarking and desk research method. The study examines their awareness, knowledge and usage of CSR principles. EF-TDMU appears to practice USR passively and it is significantly surpassed by FBE-MENDELU.As a result, the EF is recommended to include USR in their policies and strategies in the long-term. The author is highly stresses USR pratice not only in higher education, but also from kindergarten to grow and develop a seed of love in kids, love for human beings, nonhuman beings and nature, and a need for expressing love and mindfulness in certain activities
The influence of ultrasonic surface rolling on the fatigue and wear properties of 23-8N engine valve steel
No full textAn ultrasonic surface rolling (USR) technique was employed for the first time as a method to enhance the fatigue and wear resistance of 33Cr23Ni8Mn3N (23–8N) austenitic engine valve steel. The microstructure of the modified layer on the material surface was characterised by scanning electron microscopy (SEM) coupled with electron back scatter diffraction (EBSD) and transmission electron microscope (TEM) methods. Nanoscale lamellar grains were discovered on the top surface of the treated material, and an increase of compressive residual stress and microhardness of the surface material observed. A comparative fretting wear test and a rotating bending fatigue test were performed out to verify the surface enhancement effect. Fractured and worn faces of specimens were evaluated through utilizing SEM and energy–dispersive spectroscopy (EDS). Compared to the untreated material, the coefficient of friction of USR treated material was significantly reduced, and the wear resistance was improved. The fatigue strength of a specimen treated at 25 °C was increased from 528 MPa to 730 MPa (38.3 %). At 650 °C, the fatigue strength increased from 345 MPa to 400 MPa (15.9 %). The fatigue resistance extension and wear resistance improvement of treated specimen can be attributed to a combination of beneficial compressive residual stress, work hardening, and the modified microstructure with fine-grains in the surface layer, and thus demonstrates the validity of this novel technique
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