SMe Groups Research Articles

Star-like, dopant-free, corannulene-cored hole transporting materials for efficient inverted perovskite solar cells

Hole transporting materials (HTMs), owing to their unique bottom position in inverted perovskite solar cells (PSCs), exert a considerable influence on the hole-transporting process and the morphology/performance of the perovskite layers. Considering the well-known interfacial problems associated with commonly-used NiOx and poly(triarylamine) HTMs in traditional inverted PSCs, there is an urgent need for exploring efficient HTMs exhibiting good film formability/processability and interfacial contact to meet the specific requirements of high-performance and stable inverted PSCs. Herein, we fabricated inverted PSCs involving two star-like, dopant-free, corannulene-cored HTMs with O-terminals (sym-penta(N, N-bis(4-methoxyphenyl)aniline)corannulene, namely Cor-OMePTPA) and S-terminals (sym-penta(N, N-bis(4-(methylthio)phenyl)aniline)corannulene, namely Cor-SMePTPA) for the first time. The Cor-SMePTPA HTM exhibited a stronger hole-transporting ability and a better interfacial chemical linkage when compared to the Cor-OMePTPA HTM. The device containing Cor-SMePTPA HTM delivered a power conversion efficiency of 21.70%, which was the highest among inverted PSCs based on methylthio (SMe)-terminated HTMs. Furthermore, comprehensive experimental and theoretical characterizations clearly showed that the core and outer terminals (O or S) affected the optoelectric and chemical properties of the HTMs as well as the photovoltaic performance and stability of the corresponding PSCs, highlighting the superiority of the design involving a corannulene core and SMe groups in HTMs for inverted PSCs. We believe that such dopant-free corannulene-cored HTMs can have considerable potential for realizing highly efficient and stable PSCs in the future.

Organometallic Synthesis of 2,3,6,7-Tetrasubstituted 1,8-Bis(dimethylamino)naphthalenes for Investigation of the Double Buttressing Effect in Proton Sponges.

The lithiation of 2,7-disubstituted derivatives of 1,8-bis(dimethylamino)naphthalene (DMAN, proton sponge) bearing potentially ortho-directing OMe, NMe2, and SMe groups was studied. It has been shown that OMe groups facilitate selective dual β-lithiation of the naphthalene moiety while the 2(7)-NMe2 groups allow only monolithiation presumably due to the decreased acidity of the ring C-H bonds and conformational immobilization after coordination to the lithium atom. In contrast, the SMe groups provided no ring lithiation and underwent deprotonation of their methyl fragment. The first representatives of previously unknown 2,3,6,7-tetrasubstituted DMANs have been synthesized in good yield after treatment of 2,7-dimethoxy-3,6-dilithio DMAN with the appropriate electrophiles (MeI, Me2S2, Me3SiCl, DMF, etc.). Because the exceedingly high basicity of 2,7-dimethoxy DMAN is commonly attributed to the so-called "buttressing effect" (BE), the availability of 2,3,6,7-tetrasubstituted species provided the first opportunity to study the double BE version. Using X-ray diffraction and basicity measurements, we showed that due to the high conformational mobility of the methoxy groups, the most striking manifestations of double BE are the strong planarization of peri-NMe2 groups and a significant decrease in basicity, while the length and the other properties of the intramolecular NHN hydrogen bond in the corresponding protonated species undergo minor changes.

Peningkatan Potensi Ekonomi Melalui Program Pemeliharaan Lingkungan Desa Dan Pemberdayaan Bank Sampah Desa Pamagersari

This village environmental maintenance program aims to raise public awareness of the creationof a healthy environment while providing economic benefits for the community. This activity iscarried out by integrating the environmental village program with economic empowerment fromexisting waste banks, based on the 4R (Reduce, Reuse, Recycle, Replace) program for thePamagersari Village community to support the development of the Lebak Wangi tourist village.This program involves neighborhood associations (RT) and neighborhood associations (RW),environmental groups. This program will also involve existing Educational Institutions, such asSchools and Islamic Boarding Schools as well as SME groups. We hope that this program cansupport government programs in environmental care as well as extracting and developing villagepotential.

SUSTAINABLE VALUE CHAIN STRATEGY FOR TOFU SMEs

Globalization, free trade, and the current pandemic can be both a challenge and an opportunity for SMEs in Indonesia. One of the opportunities that arise from this phenomenon is the expansion of supply and demand networks. One of the SMEs in the food sector affected by the pandemic is the Tofu SME. Currently, only about 36% of tofu SMEs still survive in carrying out the production process. Most of the SMEs have problems in raw material inventory management, they do not yet have a standard warehouse. This problem minimizes their production capacity. Besides that, Tofu SMEs are still difficult to develop and sustain in the new normal era. For this reason, research on increasing the sustainability of SMEs needs to be carried out. The value chain analysis approach is used in the study to map the operational processes of SMEs and to identify activities and problems that make an important contribution to increasing the value of the SME business processes. K-means clustering method is used to group value chain levels. The Analytical Hierarchy Process (AHP) method is then used to choose a level-up strategy. Cluster 1 has the most members, which is 62 SMEs. Cluster 2 has the smallest member of 1 SME while cluster 3 has 9 SME members. The value coalition strategy is a recommended strategy to be applied to cluster 1 SME groups.

Policy Recommendations to Enhance Vietnamese SMEs’ Ability to Access Venture Capital

Small and medium enterprises, which form a large part of the entity of the domestic private sector, play a vital role in economic growth, socio-economic development and the international integration process. However, SME groups in developing countries are under-developed and face a lot of difficulties in growth due to the absence of sufficient finance. Profoundly, venture capital is typically a suitable and sustainable external source of finance for Vietnamese SMEs with high growth potential. This study provides an overview of the venture capital market and its role in SMEs’ performance in Vietnam. This research also found that one of the reasons why foreign investment funds are not interested in the Vietnamese market is that they have not seen safe and sustainable opportunities for investment. This study not only contributes to the existing literature, because this topic in Vietnam has not received much attention and evidence is not available, but also gives policymakers, in developing countries in general and Vietnam in particular, some recommendations to determine areas of improvement in regulatory and policy aspects enabling increased responsible SME access to venture capital.

Policy Recommendations to Enhance Vietnamese SMEs’ Ability to Access Venture Capital

Small and medium enterprises, which form a large part of the entity of the domestic private sector, play a vital role in economic growth, socio-economic development and the international integration process. However, SME groups in developing countries are under-developed and face a lot of difficulties in growth due to the absence of sufficient finance. Profoundly, venture capital is typically a suitable and sustainable external source of finance for Vietnamese SMEs with high growth potential. This study provides an overview of the venture capital market and its role in SMEs’ performance in Vietnam. This research also found that one of the reasons why foreign investment funds are not interested in the Vietnamese market is that they have not seen safe and sustainable opportunities for investment. This study not only contributes to the existing literature, because this topic in Vietnam has not received much attention and evidence is not available, but also gives policymakers, in developing countries in general and Vietnam in particular, some recommendations to determine areas of improvement in regulatory and policy aspects enabling increased responsible SME access to venture capital.

Dual Modulation of Single Molecule Conductance via Tuning Side Chains and Electric Field with Conjugated Molecules Entailing Intramolecular O•••S Interactions.

Herein, single‐molecule conductance studies of TBT1‐TBT6 which entails 1,4‐dithienylbenzene as the backbone and —SMe groups as the anchoring units, with the scanning tunneling microscope break junction (STM‐BJ) technique, are reported. The molecular conductance of TBT1 with intramolecular O•••S noncovalent interactions is enhanced by about one order of magnitude in comparison to their analogue TBT2 (which contains alkyl instead of alkoxy chains). By replacing the methoxy groups in TBT1 with extending alkoxy chains in TBT3, TBT4, and TBT5, the molecular backbones become twisted and as a consequence the single‐molecule conductance decreases gradually, showing that the intramolecular O•••S noncovalent interaction is influenced by the structural features of alkoxy chains. More importantly, the single‐molecule conductance of TBT3, TBT4, and TBT5 can be boosted by increasing the electric field applied to the molecular junctions. Remarkably, the conductance of TBT3, TBT4, and TBT5 can be reversibly modulated due to the conformational changes between twisted and planar ones by varying the electric field. These results demonstrate that molecules with intramolecular O•••S noncovalent interactions have the potential for in situ control of the electrical properties of molecular‐scale devices.

Assistance of Amanah Farmer Women's Group in Increasing Product Value Added Through Packaging and Label Design in Limapuluh Kota Regency

Kelompok Wanita Tani (KWT) Amanah is one of the SME groups that processes cassava into tradisional snacks of West Sumatra. Most products are sold wholesale, do not have labels and packaging, so the selling price is lower than the market price. The lack of knowledge of group members about the importance of product packaging and labels still an obstacle. The purpose of this community dedication is to provide awareness to the KWT Amanah community about the importance of labels and packaging in increasing product added value. In addition, the implementation team provided assistance in arranging P-IRT. The method used is trainning, discussion, observation and demonstration. This counseling activity provides insight and knowledge that can motivate KWT Amanah to make decisions in choosing the type of packaging used. This community dedication program are improves value added products through label designs, increase members knowledge and create the products selling value for partner.

Management practices and their relation to success of Polish SMEs: The empirical verification.

The aim of the paper is to identify management practices that are characteristic for SMEs that achieve market success measured by their business performance in last their years of their operation analyze the relationships between management practices applied in small and medium-sized enterprises and their success measured by their business performance drawing on the data from 2710 SMEs operating on the Polish market. A cluster analysis was used to distinguish homogenous SME groups in view of their management practices. We examined differences between groups in terms of their business performance. The HINoV algorithm allowed six variables to be selected out of 32 management practices chosen initially for testing, with these variables providing the basis for grouping. Modal values and medians were calculated for 17 business performance measures in the three clusters produced. The subsequent analysis of those findings was focused on capturing significant differences. In the group of 2710 Polish SMEs, it was possible to verify that there existed an association between management practices in the field of modern HRM, computer systems supporting management and the company's economic performance, as measured by an increase in net revenue and number of customers over the last three years. In clusters where the above mentioned practices were appreciated, modal and median values of the increase reported in net revenue and number of customers were significantly higher. The research has shown that at a time marked by a shortage of highly skilled personnel one should pay particular attention to building an integrated and committed team of workers and to employee empowerment. The research has also shown that SME managers monitor only a fraction of basic business performance measures, which may prove to be a major risk to SMEs. Previous studies have been largely conducted in a fragmentary manner, i.e. they were concerned with the relationships between the application of some practices (strategic management, BPR, entrepreneurial orientation, monitoring, etc.) and selected business effectiveness measures. In this paper, the research covered SME management practices from a variety of areas which were then compared with the entrepreneurs' assessment as to whether the company's economic condition changed over the last three years. It is also the first attempt in post-socialist economies to identify those SME management practices that are related to better economic results.

Theoretical study of gas-phase detoxication of DMMP and DMPT using ammonia-borane and its analogous compound

The detoxication of DMMP (Dimethyl methylphosphonate) and DMPT (O, S-dimethyl methylphosphonothiolate) via hydrogenation have been investigated computationally employing density functional theory (DFT). In this present study, we aim to explore the direct molecular H2 assisted as well as ammonia-borane (NH3BH3) and 3-methyl-1,2-BN-cyclopentane (denoted as cy-AB) assisted hydrogenation pathways of DMMP and DMPT in order to detoxify them. The detoxication of DMMP has been carried out by successive elimination of two -OMe groups. However, in the case of DMPT, two possibilities have been identified because of two different substituents, -OMe and -SMe. In possibility-I, the elimination of the -OMe group occurs at the beginning, followed by the -SMe group, whereas in possibility-II, the reverse order of elimination occurs for -OMe and -SMe groups. During the detoxication of DMMP using both NH3BH3 and cy-AB as the assisting reagents, the first step has been identified as the rate-determining step (RDS) in which the hydrogens attached to the N- and B-centers of NH3BH3 are transferred to the O-center of PO and P-center, respectively. In harmony with DMMP detoxication, for DMPT also, analyzing the activation barriers, it can be articulated that for both NH3BH3 and cy-AB assisted pathways, both the possibilities are equally feasible as in both the possibilities the common first step is the RDS. Therefore, our computational study is designed to explore the assisting efficiency of NH3BH3 and its cyclic analogue for detoxifying the OPCs.

PENGUATAN PERAN POKDARWIS DAN UKM UNTUK PENGEMBANGAN PELAGA AGROTOURISM PARK BERBASIS MASYARAKAT

The goal of community service in the second year (2020) in Pelaga village is to increase the role of tourism aware groups (Pokdarwis) and small business groups (SMEs) for the development of Pelaga Agrotourism Park-based on community. Through mentoring done by the team has been successfully created preferred tour packages and promotional tools online on Youtube, Facebook and Instagram. Agricultural products as supporting tourism produced by SME groups have been successfully improved quality and performance by using the brand Pelaga Agrotourism Park. It is hoped that the use of destination branding will increase the promotion and marketing of agribusiness products and Pelaga village as an agrotourism destination. Keywords: Pelaga Agrotourism Park, village community empowerment.

PERAN ENTREPRENEURIAL COMMUNITY DAN DIGITAL ENTREPRENEURIAL ORIENTATION TERHADAP ENTREPRENEURAL PROCESS DALAM MENGHASILKAN ENTREPRENEURIAL PERFORMANCE

Purpose- This study aims to examine the role of the entrepreneurial community and digital entrepreneurial orientation towards the entrepreneurial process in producing entrepreneurial performance.
 Design/methodology/approach- The quantitative research design was used through field research in Wonogiri District, Baturetno District, Watuagung Village, Sendang Hamlet. A total of 31 respondents were randomly selected through questionnaires.
 Findings- The results of this study indicate that the entrepreneurial community does not affect the entrepreneurial process, digital entrepreneurial orientation influences the entrepreneurial process, entrepreneurial process influences entrepreneurial performance.
 Implication- Related parties need to make efforts to improve entrepreneurial performance through mentoring members of the community in directing and developing their businesses; conduct interactive communication between management and members of the association; and forming SME groups in the context of operational and development cost efficiency (production training, managerial finance, marketing, and others)
 Keywrods: entrepreneurial community, digital entrepreneurial orientation, entrepreneurial process, entrepreneurial performance

Understanding and recommending security requirements from problem domain ontology: A cognitive three-layered approach

Socio-technical systems (STS) are inherently complex due to the heterogeneity of its intertwined components. Therefore, ensuring STS security continues to pose significant challenges. Persistent security issues in STS are extremely critical to address as threats to security can affect entire enterprises, resulting in significant recovery costs. A profound understanding of the problems across multiple dimensions of STS is the key in addressing such security issues. However, we lack a systematic acquisition of the scattered knowledge related to design, development, and execution of STS. In this work, we methodologically analyze security issues from a requirements engineering perspective. We propose a cognitive three-layered framework integrating various modeling methodologies and knowledge sources related to security. This framework helps in understanding essential components of security and making recommendations of security requirements regarding threat analyses and risk assessments using Problem Domain Ontology (PDO) knowledge base. We also provide tool support for our framework. With the goal-oriented security reference model, we demonstrate how security requirements are recommended based on PDO, with the help of the tool. The organized acquisition of knowledge from SME groups and the domain working group provides rich context of security requirements, and also enhances the re-usability of the knowledge set.

The Impact of Entrepreneurial Networks on The Performance of Small Business in Nigeria

Networking is ultimately the process of exchanging information between two or more people; in this case, entrepreneurs. The main objective of this paper is to look into the firm attributes related to formal networking and investigate whether membership in formal networks in the form of business associations and industry/trade-specific associations has been an impact on the growth of SMEs business in Lagos, Nigeria. A purposeful sample was used to select respondents. Questionnaires designed to examine the views of the entrepreneur about SME networking were distributed amongst two SME groups, namely Nigerian Association Of Small Scale Industrialists (NASSI), Lagos, and PHARMALLIANCE (Association of Community Pharmacists). The research instrument was based on a five-point Likert scale. The questionnaire administered contained 2parts, Part 1: contains general information, while Part 2: contains specific questions relating to networking. The results of the analysis showed a generally positive overview of SME networking in Nigeria. The respondents mostly agree across both groups that networking is of great benefit to their businesses.

Achieving Efficient Multichannel Conductance in Through‐Space Conjugated Single‐Molecule Parallel Circuits

AbstractConstructing single‐molecule parallel circuits with multiple conduction channels is an effective strategy to improve the conductance of a single molecular junction, but rarely reported. We present a novel through‐space conjugated single‐molecule parallel circuit (f‐4Ph‐4SMe) comprised of a pair of closely parallelly aligned p‐quaterphenyl chains tethered by a vinyl bridge and end‐capped with four SMe anchoring groups. Scanning‐tunneling‐microscopy‐based break junction (STM‐BJ) and transmission calculations demonstrate that f‐4Ph‐4SMe holds multiple conductance states owing to different contact configurations. When four SMe groups are in contact with two electrodes at the same time, the through‐bond and through‐space conduction channels work synergistically, resulting in a conductance much larger than those of analogous molecules with two SMe groups or the sum of two p‐quaterphenyl chains. The system is an ideal model for understanding electron transport through parallel π‐stacked molecular systems and may serve as a key component for integrated molecular circuits with controllable conductance.

Achieving Efficient Multichannel Conductance in Through-Space Conjugated Single-Molecule Parallel Circuits.

Constructing single-molecule parallel circuits with multiple conduction channels is an effective strategy to improve the conductance of a single molecular junction, but rarely reported. We present a novel through-space conjugated single-molecule parallel circuit (f-4Ph-4SMe) comprised of a pair of closely parallelly aligned p-quaterphenyl chains tethered by a vinyl bridge and end-capped with four SMe anchoring groups. Scanning-tunneling-microscopy-based break junction (STM-BJ) and transmission calculations demonstrate that f-4Ph-4SMe holds multiple conductance states owing to different contact configurations. When four SMe groups are in contact with two electrodes at the same time, the through-bond and through-space conduction channels work synergistically, resulting in a conductance much larger than those of analogous molecules with two SMe groups or the sum of two p-quaterphenyl chains. The system is an ideal model for understanding electron transport through parallel π-stacked molecular systems and may serve as a key component for integrated molecular circuits with controllable conductance.

Unusually Distorted Pseudo-Octahedral Coordination Environment Around CoII from Thioether Schiff Base Ligands in Dinuclear [CoLn] (Ln = La, Gd, Tb, Dy, Ho) Complexes: Synthesis, Structure, and Understanding of Magnetic Behavior.

The synthesis, structural characterization, and magnetic behavior of a new family of binuclear CoII-LnIII complexes of formula [LnIIICoIIL2(NO3)3]·H2O (Ln = La, 1; Gd, 2; Tb, 3; Dy, 4; Ho, 5; HL = 3-methoxy-N-(2-(methylsulfanyl)phenyl)salicylaldimine) have been reported. The chosen ligand system HL has adjacent soft ONS and hard OO binding pockets ideal for selective coordination of CoII and 4f metal ions. All the complexes 1-5 exhibit a CoII center in a highly distorted octahedral geometry with the LnIII centers in bicapped square-antiprism geometry. The unique distortion about the CoII center is introduced by the coordination of 4f metal ions in the hard OO coordination site. The distortion is further supported by the presence of -SMe groups giving an S donor atom which owing to its larger size can support large bond distances and angles. The geometry around the CoII centers is intermediate between meridional and facial geometric isomers. The magnetic properties of these complexes have been investigated by a "full model" approach using CONDON with the experimental magnetochemical analysis revealing ferromagnetic Co-Ln coupling in compounds 2-5. Ab initio calculations on the X-ray crystal structures of 1-5 paint a semiquatitative picture about the contribution of the individual anisotropic centers toward the overall magnetic properties of the compounds. Theoretical analysis predicts 1 and 2 as weak single-ion magnet (SIM) and single-molecule magnet (SMM) respectively with CoII being solely responsible for the complex anisotropy. In 2, JCoGd plays a crucial role in preserving the anisotropy contribution of Co by channelizing relaxation via a higher excited exchange doublet. Because of the inefficiency of JCoTb, JCoDy, and JCoHo in quenching single-ion Ln fragment transverse anisotropy and preserving CoII high axial anisotropy (favoring rhombicity), 3-5 lack SMM behavior.

Pseudodimeric complexes of 4-styrylpyridine derivatives: Structure–property relationships and a stereospecific [2+2]-cross-photocycloaddition in solution

The study addresses the spectral and photochemical properties of N-(3-ammoniopropyl)-4-styrylpyridinium diperchlorate and its substituted analogs containing either electron-donating (OMe, SMe, NMe2) or electron-withdrawing (NO2, Cl) groups on the benzene ring. These styryl dyes in MeCN form pseudodimeric complexes with uncharged 18-crown-6-containing 4-styrylpyridine due to hydrogen bonding between the ammonium group and the crown ether oxygen atoms. The stability constants of the complexes were determined by spectrophotometric and 1H NMR titration methods. Owing to complexation, the dyes containing OMe or SMe groups and the dye with unsubstituted benzene ring undergo a stereospecific [2 + 2]-cross-photocycloaddition to the crown-containing styrylpyridine to give unsymmetrical cyclobutane derivatives as single rctt isomers. The structure of cyclobutanes was confirmed by X-ray diffraction analysis. The most probable conformations of the pseudodimeric complexes in MeCN were determined by density functional theory calculations. The cross-photocycloaddition quantum yields, measured upon selective excitation of the styryl dye, and other relevant data suggested that the barrier for this photoreaction increases with an increase in the reorganization energy of the singlet excited state of the dye.

Cephalometric evaluation of rapid and slow maxillary expansion in patients with BCLP: Secondary data analysis from a randomized clinical trial.

To compare the dentoskeletal effects of rapid (RME) and slow (SME) maxillary expansion in patients with bilateral complete cleft lip and palate (BCLP). This was a secondary analysis of a previous randomized controlled trial (RCT). Forty-six patients (34 male, 12 female) with BCLP and posterior crossbite (mean age of 9.2 years) were randomly assigned to two study groups. Group RME comprised subjects treated with Haas/Hyrax expander. Group SME included patients treated with quad-helix appliance. Cone-beam computed tomography (CBCT) was performed before expansion (T1) and after appliance removal at the end of a 6-month retention period (T2) for a previous RCT that compared the transverse skeletal effects of RME and SME. CBCT-derived cephalometric images were generated and cephalometric analysis was performed using Dolphin Imaging Software (Chatsworth, Calif). Intergroup comparisons were performed using t tests (P < .05). Baseline forms were similar between groups. No significant differences between RME and SME groups were found. Rapid and slow maxillary expansion produced similar sagittal and vertical changes in patients with BCLP. Both Haas/Hyrax and quad-helix appliances can be used in patients with vertical facial pattern. Clinical relevance: RME and SME can be equally indicated in the treatment of maxillary arch constriction in patients with BCLP.

Strategi Penerapan Standar Nasional Indonesia Biskuit (SNI 2973:2011) bagi Industri Kecil Menengah

BSN on December 22, 2011 has stipulated SNI 2973: 2011 Biscuit through the Decree of the Head of BSN No.242/KEP/BSN/12/2011, scope of products in SNI 2973: 2011 are Biscuits, Krekers, Wafers and Pies, Kukis. Until now the number of industries that apply SNI Biscuits is still low from 595 brands of biscuit products that have been registered in BPOM (BPOM, 2017) only 28 brands of biscuits that have received the certificate of SNI (BSN, 2018). Developing strategies to apply SNI Biscuit for SME is to increase applying SNI, as well as input to related technical institution and related party in conducting coaching related to application SNI products for SME. The results of the assessment of the readiness of the five SME in implementing SNI 2973: 2011 Biscuits respectively as follows: SME A is 97.4%; SME B is 84.5%; SME C of 83.6%; SME D of 62.9%; and SME E of 71.4%. The grouping of the five SME using statistical analysis four SME groups based on their level of readiness in applying Biscuit SNI, namely the first group that is ready to apply the Biscuit SNI (SME A) which is in zone 1; the two groups are quite ready in applying the Biscuit SNI (SME B and C) in zone 2; the three groups of SME that are less prepared in applying the Biscuit SNI (SME E) which are in zone 3; the four groups of SME that are not ready to apply the Biscuit SNI (SME D) which are in zone 4. The recommended strategy for the four groups of IKM using Ishikawa diagram which focuses on the lowest internal and external factors of resources in each SME group.